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1. 1 2 3 4 5 6 7 8 DECOUPLING CAPS NEAR VCC PINS ONE CAP ON EACH SIDE 3V ONLY DECOUPLING CAPS NEAR PINS 1 AND 21 TOPO 2 A8 KISO 2 A8 BSMRAS 029 BSMCAS 741 162245 BSMR W VCCA VCC2 RP s Share Footprint Area with U28 U30 U16 U17 RESET 1 B4 D5 2 A1 4 D6 5 C1 RESET VCC8 VCC1 1Mx16 DRAM 1Mx16 DRAM DMD 23 P EM Bi D15 D15 LISACS 2 5 1 2 At 47 D14 DMD 22 D14 TWE 1 4 5 2 1 4 6 BIDII AIE DMDD 23 1 8 Dis DMD 21 Bis 1 1 2 1 Bid DMDD 22 2 7 Ais DMD 20 512 CA 20 00 1 8 2 1 4 5 CA 09 Bile DMDD 21 3 6 Dh DMD 19 Dit Bile DMDD S 1 3 0101 35 puppi 010 CA 06 Bia p 2 7 Ed DMD 16 Du 05 DMDD I7 3 6 DMD 15 007 CA 04 DIR1 GT DMDD 16 4 5 Dog 9 DMD 14 eM E CAD 2 1 47 14 D05 9 DEDIT Dos 8 2 2 Aal 47 RP15 D04 004 1 8213 Azis DMDD 15 1 8 0085 Dos A d DMDD 14 2 7 003 4 DMD 1O peara CD 15 00 1 A8 2 C1 4 C6 CD 15 D
2. R63 19M 114148 1 D16 A Fel 121 0K 1 a L C21 L 1NTMIDITxD 1 A8 165K 1 R67 072 1000pF 1 2 U3 i 5 INTMIDIRXD 1 A8 1 1 1 LCD Contrast Adjust is ers 1 01 BREATH LL4148 CONTROL 55 05 a J305 5Vref 1 A1 74HCUO4 t 2 SLIDER MUXAO 1 8 10uF 16V 5VREF 1 B8 C7 CTRL1 1 8 CTRL3 U11 CTRL4 DEREN AGND SLDR 1 1 5Vref 1 A11 FOOTSWITCH 1 FTSW1 1 C1 TELMOD6PIN 1 5K C14 RBN XYZ R82 T 1000pF REF REF SEC2 Y SEC3 pee E TOUCH 1 C1 FOOTSWITCH 2 FTSW2 1 1 LLA148 14148 4 LL4148 J816 D9 D10 011 a m 2 TOUCH 1 C1 a D6 D7 D8 LL4148 LLA148 LL4148 TOUCHO 1 61 FOOTSWITCH 3 FTSWS 1 C1 C16 ol 1000pF Q2 MMBT2222 7 m ul R77 m YOUNG CHANG CO LTD D bus Reproduction without the express written consent MMBT2907 of Young Chang Co Ltd is prohibited PC88 II CONNECTOR PCB Digital Interfaces Filename 021221C4 Date 9 29 00 By DMH Sht2 of 3 TOUCHSENS 1 1 7 11 Kurzweil PC2 Series
3. Left Front Right Front Panel Board Panel Board J604 J603 4602 4601 FP Bridge 2 FP Bridge FP Bridge Front Panel I Hp Vol Pwr Sw mM Board H J3 J2 FP Bridge 2 Vol Pwr Hp Connector Board l i J322 J301 J303 J304 J302 I Vol Pwr Hp PC2 Power MIDI amp CPU Front Panel Power In LCD 3 J406 J402 J412 LCD PC2PWR Audio Out Engine Ten Backlight Board 9 E 4410 Expansion Sound ROM 1 4409 Expansion Sound ROM 0 J404 EPROM Board J408 MIDI amp CPU 9 13 Troubleshooting PC2 Interconnect Diagram PC2 Interconnect Diagram Front Panel Board 5 14 Button Board 0101 Slider Slider Board J604 Front Panel J602 FP Bridge J102 FP Bridge J402 2 PWR J412 Engine LCD Audio Out J408 J405 Board Backlight e J410 Expansion Sound ROM 1 N J409 Expansion Sound ROM 0 J403 MIDI amp CPU J404 EPROM Board Connector Board J301 J303 J308 J306 J307 J304 J305 PC2 Power MIDI amp CPU Wheels Treble Bass Front Panel Slider J204 Pitch Wheels Board J205 Mod
4. C90 C82 0 1 0 1 uF Kurzweil PC2 Series Service Manual DECOUPLING A U10 A SMA 25 1815 wb 210 74VHC139 SMA 24 14 4 vg 12 YTo a 510 64 1596 935 73208 U18 U19 U20 ROM4MX16 ROMAMX16 A21 A21 A20 BHE A20 BHE A19 A19 18 18 OE A17 17 b RUN A16 A16 ean A15 015 1 A15 015 1 14 014 29 14 014 29 SMA A13 D13 2 A13 D13 2 LA A12 D12 A12 D12 PHA 11 01122 11 01122 SMA A10 D10 A10 D10 B A09 D09 A09 D09 Bu A08 008 A08 008 1 06 PA 4 07 07 50 SMDI 07 Do7 30___SMD Sma A06 006 06 006 EU A05 05 26 A0
5. uen 77777 STU vwx Be 55 Sound Setup Select Effects and Reverb cdas Hed ux TIT EA soups 0 Puno Pino EPlno1 EPlano2 PopKeys Organ FXA 1 Ta j Cancel Chorus Vib Previous Next 1 MuteA 1 No n 1 EZ a de Ses Voices Pads Gutar Bees Drums Percussion che p i g sus ST MT MT acl oT MT J Aw Tue t i i i f Effects i Master Sound Setup Reverb Volume Select Sound Sound Setup Source Select Figure 1 2 PC2 PC2X Front Panel layout Zone Select and Assignable Controllers Main Layer Split Split Layer Zone 1 2 2 Zone 3 2 4 Solo Perc On Off Volume Decay Pitch Drawbar Master U Split Point Toggle Volume A B EQ Octave Shift 8 SWi Fast Slow 5 02 Chorus Vib L M i On Off i g SW3 16 5 1 3 8 4 Chorus Vib 22 3 2 13 5 11 3 Depth Figure 1 3 Master Volume Zone Select and Assignable Controllers section Introduction PC2 PC2X Master Volume Slidepot to adjust the overall volume Zone Select and Assignable Controllers The operation of the buttons and sliders in this section depends on which of the three performance modes is active Their labelling is color coded to identify their
6. nennen ettet tenens 6 12 poete A E dA MR M LI CAN RA E eC 6 13 Connector Board NO1230004d 233 232 ea ere ov eee estoy tee ede 6 13 Front Panel Assembly 12300070 ente tnter nnne tenens 6 14 Left Front Panel Board NO12300080 cccccccssecssscescecssceesscssscessecessecsscessecsececsssecasessesessecessecsueeesseceeeecseeeaeens 6 14 Rieht Front Panel Board NO12 00000 a Be 6 15 Headphone Volume Power Switch Board N012700019 essent tentes tententn tens 6 15 LCD Board 012103802 5 boe 6 15 Final Assembly N012000153 2 tite tiet isnt e ete de eed bete cen eite beo tia dena 6 16 Chapter 7 Schematics Engine Board Mictoproc ssor pape 1 of b oe bec ne 7 8 Engine Board Master Slaye Mabels page 2 of I dans 7 4 Engine Board Lisa F X 128Ch Option Clocks page 3 of 5 400020000000000000000020000B0 tenentur tates 7 5 Engine Board Sound ROM Uart Glue Decoupling page 4 of 5 sse 7 6 Engine Board Audio Channel Muting Control page 5 of 5 sessi tete rne 7 7 Front Panel and IBBB Board keyboard models FP Buttons and LEDs page 1 of 2 7 8 Front Panel and IBBB Board keyboard models IBBB Buttons and LEDs page 2 2
7. g7 VOLPWR HPho es WV R133 AAA 15 0K 196 2 MMBT2907 Q8 C28X C34X 100uF 16V 7 100uF 16V lt C26 4 R132 1000 FB2 5TSMT 15 0K 1 NE5532 Sl 1 2 2 ug 1 V 15 0K 1 4 2907 2907 A142 Q12 Q13 9142 gt 15 0K 1 C42 R8 R127 R129 5 6K E 3K 2907 Q4 HPLEFT C46 100pF Sw Q7 4409 HPRIGHT HPRIGHT 4 70 MMBT2222 B R136 Q14 eq Q15 KSC2331 KSC2331 15 0K 196 E xi 2 0 R135 1000uF 16V 15 0K 1 NE5532 V V 1 2 09 LEFT MONO i 7 2 1 5 15 0K 1 138 123 2 RING 15 0 1 200 1 1 3W 1 NA 2 R124 TIP 200 1 1 3W Ja02 R130 57 LEFT MONO LOUT LOUT AGND ROUT ROUT PC88ll AUDIO OUT V 2 1 3 021 TE LL4148 A a 2 200 1 1 3W 2 R139 200 1 1 3W 141 7 ONE EACH AT GROUND PINS Ut 02 U5 U7 011 YOUNG CHANG CO LTD Reproduction without the express written consent of Young Chang Co Ltd is prohibited P
8. L_ MIDI jack screws 2 7 8 longer screws with spacers Figure 4 7 Rear panel hardware locations Remove the two screws that secure the MIDI jacks to the rear panel See Figure 4 7 Remove the Connector Board 4 9 PC2 PC2X Disassembly Assembly Top Enclosure Replacing the Connector Board 1 Hold the Connector Board and position it so that the power switch LCD Contrast potentiometer and the rear panel jacks are correctly positioned through the rear panel portion of the top enclosure Install the two screws that secure the MIDI jacks to the rear panel See Figure 4 7 Install the five screws that secure the Connector Board to the rear panel Be sure to place a spacer and use one of the longer screws at the locations noted in Figure 4 7 Connect the wire trap flat ribbon cables in the following order Caution Be sure to look for the marking on the edge of the cable denoting Pin 1 and that you match it correctly with Pin 1 on the board Make certain that the wires are straight prior to inserting them into the connector and that each wire is correctly inserted into its respective position Note Be sure the sides of the connector are lifted Insert the flat ribbon cables into the wire trap connectors and push down the sides of each connector to lock the cable into the connector Gently pull each cable to verify that it is locked into its connector Insert the five wire flat ribb
9. eise ee Freie poete dre oes 5 13 PC2Interconnect Diagram ento bote iiie ero ten re T i tiere 5 14 Chapter6 Parts Lists Introduction Do Te tei tud ted idee D 6 1 PC2 PC2X Printed Circuit Boards and Assemblies esee tenente tete 6 1 PC2R Printed Circuit Boards and Assemblies rennen 6 2 PER terr E EM A 6 3 Engine Board N012300051 entree ea He ap AEAEE 6 3 IKE AE E 6 5 Kurzweil PC2 Series Service Manual Contents Front Panel Board N012400052 ettet eee eerte reet eb e ns dedos 6 5 Connector Board N012300061 i utr 6 6 ECD Board N012103800 5 12 es ite et een i di ce tm ER 6 8 Pitch amp Mod Wheel Assembly 01250005253 eet 6 8 Slider Board NOT2400051 2 22 822 cti decre eie cer pepe ere Pee tpe even tee ede e ee 6 9 DO oc tuc d inco iet ders eti ro nie LR nee 6 9 Final Assembly N012000150 m i tereti ei edet ite in 6 9 Keyboard Assembly 215040311 entente tenente entente tenens 6 10 CE EE 6 11 FiriakAssembly N01200015 1 5 rte tr teo n Pre Pr ti bert e Ce e eere eie tend 6 11 Keyboard Assembly N2I50404T
10. PORT63 PORT62 PORT61 PORT60 5 47 PORTS Al2 BI2 6 PoRTe2 TACK 2 B8 AB BS 15 PORTES PORT63 PORT67 4 64 PORT62 PORT66 TOUCH 2 05 5 13 PORTES PORT61 PORT65 A 6 86 15 Portes PORT60 PORT64 TOUCH 2 05 TOUCHS 2 05 AU BIZ 11 PoRTez J304 RONT PANEL 45V 20 1 19 DGND3 16 DGND2 DGND1 L2 FE BEAD PHASEB PHASEA A 8 B 8 Gi G2 o SENSE DRIVE 100 RP6 COLA COLD COLC COLB PORT57 ROW7 PORT56 ROW6 PORT55 ROWS PORT54 ROW4 ROWS3 ROW2 ROW1 ROWO AAAA 100 PORT53 PORT52 PORT51 PORT50 100 _RP8 COMPONENTS TO KEEP NEARCONNECTORS 575757575757575 CONNECTOR COMPONENTS J304 L2 R117 R20 RP6 8 MKO C6 1000pF FATAR 88 BASS
11. RESET 3 C1 PWRUPRST 3 A8 INTMIDIRxD 2 C7 INTMIDITxD 2 C7 TRO 2 C7 DAC2 DAC1 U1 M37451 P 37 P 36 H uNuseD RESETOUT 5 AIN 7 RxD P 34 RP11 10K AIN 6 PWM P 33 AIN 5 EV3 P 32 AIN 4 EV2 P 31 AIN 3 EV1 P 30 AIN 2 AIN 1 A15 P 17 COMPONENTS TO KEEP NEAR CONNECTORS AIN O 14 16 CONNECTOR COMPONENTS P P P P P P P P RIBN SLDR A13 P 15 57VSLD7 A12 P 14 J304 L2 R117 R20 RP6 8 56 5106 A11 Pf13 55 5105 A10 P 12 54 8104 AO9 P 11 Uti 53 5103 A08 P 74HC4051 52 5102 S1V SLD1 A07 P s 50 8100 AO6 P 5 J TP SYNC A04 P i RIBN SLDR A03 P v RW A02 P 1 WR A01 P VOLUME YA IRD A00 P 3 A3 5 Y5 PORT27 Ye PORT26 v PORT57 PORT56 PORT55 PORT54 PORT53 PORT52 51 50 16 57 56 55 PORT54 T R22 1 5K CLKOUT D7 P PORT53 XOUT D6 P PORT52 XIN D5 P PORT25 PORT51 D4 P PORT24 50 2 PORT23 USED PORT22 D2 P VREFADC D1 P VREFDAC DO P EM FB2 STSMT 2 gat f 12 2880M i
12. 2 001 jo 002 B 3 A 3 FE BEAD L5 B 4 A 4 B 5 A 5 003 004 B 6 A 6 D05 B 7 A 7 o 00 1 O wN 006 B 8 A 8 DR o LCDCS 4 C6 LCDE 4 7 C7 1000PF D07 20x2 LCD J403 MIDI amp CPU 4 B6 MTXD 4 7 7 AK7 CRXD CTXD AESO 2 A8 gt IO YOUNG CHANG CO LTD Reproduction without the express written consent of Young Chang Co Ltd is prohibited PC88 II ENGINE MICROPROCESSOR Filename P82RDV4 Date 9 19 2000 Eng By T THOMPSON Mfg Sht 1 Doc 021197 Kurzweil PC2 Series Service Manual KISI 3 08 DSACKT 1 A1 3 A1 TWE 1 3 4 5 3 1 4 6 TSI Toa ToS T94 2 KISO 3 A1 CA 20 00 1 A8 3 A1 4 B5 3 A1 D6 SMWE 4 D1 CLK20 3 08 4 06 CLK25 1 1 3 08 5 1 RESET 1 4 05 3 01 4 06 5 1 DACBCLK 5 01 JTAGIN JTAGOUT BA EAT P ADCMCLK JTAGCLK AESO 1 06 SSMRCS 4 A1 MA 25 01 4 B1 ADCDATA ADCBCLK ADCL R 5 25 SMA 25 127 64 67 MDATAI 59 MSYNC 02
13. Left Front Panel Board N012300080 Part No Description Gty Reference Designation N013035412 CABLE FRONT PANEL PC2R 200mm 1 N041030036 HEADER 16P PICOFLEX MOLEX 90325 0016 1 J603 N041034002 HEADER 098 SP 2P 22 03 5025 1 J604 N043003704 SW TACT SPST 160gf ALPS SKHHDA 6 515 20 N045010111 LED T1 RED HI EFF DIFFUSED LTL 4221 1 D10 N045010610 LED MINI RED GREEN DIFUSSED T1 DKL 30RGM 5 D11 13 15 17 19 N035033800 KEYCAP W LED PC2R 6 15 20 N051102304 POT 10K 15mmLx6mmD FLAT ELEC 4 R19 22 035025813 POWER SWITCH VOLUME PC2R 4 R19 22 N051101702 RES CF 159 5 1 8W 1206 2 R17 18 N052007503 CAP CER X7R 0 1UF 50V 10 1206 1 C7 N053000802 DIODE SWITCH 1N4148 SMT DL 35 4 D12 14 16 18 N054000802 TRANSISTOR MMBT2222L SOT 23 2 Q9 10 6 14 Right Front Panel Board N012300090 Parts Lists PC2R Part No Description Qty Reference Designation N041030036 HEADER 16P PICOFLEX MOLEX 90325 0016 1 J602 N041030326 HEADER 1 SP DUAL ROW 26P 057 026 153 1 J601 N043003704 SW TACT SPST 6mmX6mm 160gf ALPS SKHHDA 14 51 14 N045010111 LED T1 RED HI EFF DIFFUSED LTL 4221 D1 8 N045010610 LED MINI RED GREEN DIFUSSED T1 DKL 30RGM 1 D9 N051004710 POT 36STEP 2BIT GRAY 1 SP1 N051102303 POT 10K 20mmLX6mmD KNURLED ELEC 1 R1 N052002422 CAP ELECT 470UF 6 3V 3 5mm SP 11mm 2 C12 N035033800 KEYCAP W LED
14. eter ort eee 5 1 Plat Ribbon Cables ee ede oe eat ele EE edes 5 1 Cable Routing eeepc notet oe 5 1 Surfaces Mount DEVICES arte tte eee Ere ePi 5 1 Saving net eee im ae ln tef rose Ios a Ee T ER Stat wales 5 1 Boot Block Ed bd eee 5 2 Entering the Baot Black ne 5 2 ue a Pre ed e det le 5 2 Kurzweil PC2 Series Service Manual Contents Hard RES Ct seca ERR 5 2 a nern ENGER Eon ENG PERS 5 2 software Upd tes iie ie ee Rite nisi eret let tereti Sea askin i E Used 5 3 File Formatss ren MC 5 3 Installing the Operating System or seh an 5 3 Installing a New Boot Block 5 4 Installing Sound ROM Options 5 4 Replacing 5 5 PCZ Keyboard Models 2 282 aan rp e P e RI 5 5 Accessing th een LL NL ni 5 5 Removing the Battery iuba aeo ora e to oben eben pl Sed 5 5 the Battery e uet ut 5 5 PG2R R ack np E 5 6 ee a ee 5 6 Removing the Ballerve ee bes ee Wr 5 6 th Bakery ss es 5 6 Scanner re tert an nina hien he
15. 7 9 Connector Board keyboard models Scanner page 1 of 3 sese 7 10 Connector Board keyboard models Digital Interface page 2 of 3 ssssssssssssseeeeee 7 11 Connector Board keyboard models Power Supply Audio page 3 of 3 sse 7 12 Slider Board keyboard models Sliders un 7 13 Right Front Panel Board rack models FP Buttons and LEDs page 1 Of 2 sss 7 14 Left Front Panel Board rack models Controllers FP Buttons and LEDs page 2 Of 2 7 15 Connector Board rack models Seanner page 1 of ederet 7 16 Connector Board rack models Digital Interface page 2 of 3 sse 7 17 Connector Board rack models Power Supply Audio page 3 Of 3 sse 7 18 Power Volunme Headphone Board rack models ur nn fu tob ios ache 7 19 Kurzweil PC2 Series Service Manual Contents vi Chapter 1 Introduction 2 JN em 4 LEN This chapter provides the service technician with a layout of the front and rear panel features as well as a brief explanation of thier functions For in depth descriptions of the many features the PC2 Series instruments include consult the Musician s Guide This chapter also includes a description of the models available in the PC2 Series and a description of the symbols used throughout this manual
16. er dS edis 3 13 Removing the Headphone Volume Power Switch Board sse 3 14 Replacing the Headphone Volume Power Switch Board sse 3 14 Chapter 4 PC2 PC2X Disassembly Assembly Introduction e 4 1 Notes Cautions Wafnings eed eene energie sine 4 1 Cables tese i 4 1 Flat Ribbon Cablesza e eet et etd tete tt ak tate Ha Lose ente 4 1 Gable Routing e t eet ei ins 4 1 Required Tools and Materials rte rn red ae ee dir ta ihe eee 4 1 4 2 POZ m ise Gne nd eie dash itte eR e IHR 4 2 PC2X BOttom DR UR NS PIENE einr umt 4 3 Removing the cse range kai 4 4 Replocins die Top EHCIOSUfe 4 6 Closing the T C2 POX runen 4 6 TOP onte eee epe temo e aee ete tese diia da oats cubes ed e 4 7 Removing the Enclosure Support Walls zn 4 8 Left Enclosure Support Wall eese entente 4 8 Right Enclos re Support Wall are ze ae ee ee 4 8 Replacing the Enclosure Support NAILS ns a u 4 8 Left Enclosure Suppott Wall wenn niemals an Rene ere HER RE 4 8 Right Enclosure Support Vall bee ee en ten 4 8 Removing het onnector Board a er fiera 4 8 Replacing Connector Board te educt
17. DOS 4 0814 211 111 7 3V ONLY 4 6 3 4 3 AUF 8 DMAIOS azas 00172 001 DIRI GT LM39401S 3 3 A2 AA ADIAA Doo a L u 3 A1 A3 VCCi Al A3 VCCI 20 0000MHZ 1 VCC2 9 2 VCC2 9 L 2 06 GND VCC3 i VCC3 H 3 F lt VR 4 089 NC A0 vCC4 NC A0 VCC4 DMA 03 47uF 33uF TANT DGND26 39 45 50 DGND26 39 45 50 DMA 02 DMAJ01 ll GG U13 y DMA 00 VEO E NC7SZU04 3V ONLY LOCATE 220 330 RESISTORS AT FARTHEST POINT FROM DR a 4 L pRAM PWR 220 1 4 10 15 21 28 34 39 45 DGND a 3VCC and DRAM_PWR need fat traces VCC J408 vcc vcc BV ONLY 128 CHANNEL OPTION E VCCi VCC2 R23 GND2 10K 6 8pF 50V NPO SS 1 1 55 2 gH SCK 1 C1 SCK SGND1 a nur MISO 1 B1 C3 MISO PRSNT MOSI 1 B1 C3 MOSI SGND2 KISI 2 A1 24 5760MHz KISI SGND3 CLK20 2 A8 men CLK20 SGNDS CLK25 1 61 CLK20 2 A1 5 C1 RESET SGND6 D Sen YOUNG CHANG CO LTD GND3 GND4 RESET 1 4 05 2 1 4 06 5 1 LISA MABEL Decoupling Caps T U29 Decoupling Caps U28 Decoupling Cap U30 Decoupling Caps 4 Reproduction without the express written consent of Young Chang Co Ltd is prohibited c84 C85 PC88 II ENGINE 0 1 uF 0 1 UF 0 1 uF LISA F X 128CH OPTION CLOCKS Filename P82RDV4 Date 9 19 2000 gt T THOMPSON 3V ONLY Sht3 of 5
18. LOUT AGND ROUT 15 0K 1 R142 N V R122 z 15 0K 196 042 0 1uF C46 100pF 1 R136 15 0K 1 2 R135 15 0K 1 1 2 ROUT 2 1 PC88ll AUDIO OUT V 15 0K 1 138 N V NE5532 U9 7 Q12 R127 3K MMBT2907 MMBT2907 Q13 R129 3K HEADPHONES R123 15 0K 1 D V Q14 KSC2331 R130 015 KSC2331 E V 200 1 1 3W 2 LEFT MONO R124 200 1 1 3W 2 R141 200 1 1 3W 2 R139 200 1 1 3W 2 YOUNG CHANG CO LTD Reproduction without the express written consent of Young Chang Co Ltd is prohibited PC88 II CONNECTOR POWER SUPPLY AUDIO Filename 021221C4 Date 9 29 00 By DMH Sht3 of 3 Kurzweil PC2 Series Service Manual 1 2 3 4 5 6 7 8 J102 FP BRIDGE A LEDROWI LEDROW2 3 SWROW 4 COLO 5 COL1 6 COL2 gt COL3 8 NC x Y m Y 7 2 2 2 2 B Di ARD xx 03 D4 DUAL COLOR X DUAL COLOR DUAL C
19. 1 AVCC A avss WE WRIP no RD E P C4 C5 VCC CSI P PORT64 7 PORT63 NPO 33pF NPO VSS2 AO P VSS1 RDY P PORT63 6 62 PORT62 5 PORT61 INT3 P MODE INT2 P FORI INT1 P 8 PORT64 5Vref 3 A3 CPU J304 RONT PANEL Q18 CONTHI MMBT2222 WPR CONTLO CONTRAST 2 C6 CTRL1 CTRL2 CTRL3 CTRLA 5V 1 yy 12 PHASEB FB2 5TSMT End 110 PORT26 PORT27 100 RP6 2 PORT25 PORT24 PORT23 SENSE DRIVE PORT57 PORT56 PORT55 YOUNG CHANG CO LTD Reproduction without the express written consent of Young Chang Co Ltd is prohibited PORT52 PC2 Rack Connector PCB PORT51 Scanner Filename 021250B3 Date 9 29 2000 100 RP8 B By D O Neill Sht 1 of3 Rev 100 RP7 7 16 Kurzweil PC2 Series Service Manual L5 Use either U6 or U7 R6 AES XFRMR 270 5 2 1 SPDIF OUT C47 LL4148 r1000pr 013 A R102 56 2 3 a a PC910 U6 U5 U5 74HCU04 74HCU04 uq 13 DIGITAL O
20. 2 5 2 5 D DIS 3 poi 3 BDO 3 14 2 6 2 6 Doo 000 D DMDD i 1 8 15 E e DMDD 10 2 7 VCC1 12 D 2 DMDD O 3 6 VCC2 VCC3 VCC2 H D of DIR2 GZ DMDD 08 4 5 D DGND 22 37 42 DGND 22 37 42 03 D 00 410152128 34 39 45 DGND P LEE 08 D DMAIS DMDD 07 8 1 D 8 DMDD O6 7 2 Sut on 09 D DMA 7 U28 DMDD 05 6 3 Use Dual Footprint for DRAM s 04 5 TALCX2245 2 5 1 DRAM Decoupling Capd DRAM Decoupling Capd 08 D DMA A DMDD 02 7 2 DRAM_PWR DRAM_PWR B 02 D BE 4 DMDD Oi 6 3 al D DMA 2 B 5 DMDD 00 5 4 C86 C87 C22 C23 00 D DMAH 4 6 0 1 0 1 uF 0 1 0 1 uF BIS RPi8 47 a a a a 74 8 B 6 7 47 R39 VCC 4174151 7180 8 1 2 B 7 BSMRAS B DGND 5 18 42 52 73 81 BIB 9 vec en U31 VCC us DIR DMA 09 1M AMx16 DRAM 1M AMx16 DRAM 9 DMAI08 RASIM 18 RASIM 47 21 RASAM Io RASAM pis S AQUCASIM pic DMD 07 5 MAIO UCASAM 015 SEQUCASAM pi DMDJ06 LCASIM SSOTCASIM DMD 05 U12 U30 3 6 DMA 05 013 aa 5 NC7SZU04 74LCX162245 4 5 04 D12 D12 0 1 8 DMA 03 wm 011 011 03 4 VCC4 VCC2 2 7 DMA O2 WaM D10 D10 on vcc3 VCCi 3 6 01 009 009 Pi BSMRAS 4 5 DMA 00 OE4M 008 1 2 1 2 BSMCAS A9 A11 Es 9 A9 A11 Bu 9 3 ATS BSMR W AB A10 8 AB A10 8 4j 30 azao 005 7 azao 005 7 c11 5 1 5 AG A8 0045 AG AB 045 6 8pF 50V NPO 6 1 6
21. 26 4 3 2 2 3 4 61 62 63 168 62 61 DACCTRL2 SMOE 4 A1 D1 SMWE 4 D1 MDATAO SMFIFOLO 2 SMFIFOLO 29 DACCTRLO DACCTRL1 ADCCTRLO ADCCTRL1 ADCCTRL2 ADCCTRL2 ADCCTRL1 ADCCTRLO DACCTRL2 DACCTRL1 DACCTRLO TDI TDO MSMRCS 4 A1 TMS RESET 18 54 57 889092 124 125 128 VCC VCC 1854 57 88 90 92 124 125 128 CS 17 55 58 87 89 91 123 126 129 DGND RD DGND 17 55 58 87 89 91 123 126 129 WR BIUA14 BIUA13 BIAU12 BIUA11 BIUA10 9 CANO u10 BIUAO9 74VHC139 BIUAO8 15 Calor 15 2 4 BIUAO7 2 9054 MMABELCS BIUAO6 1 9 CAIO6 SMABELCS BIUAOS Y20 LUSACS BIUAO4 19 dG BIUAO3 BIUAO2 BIUAO1 BIUAOO U11 MABEL 2 MASTER BIUD15 BIUD14 BIUD13 BIUD12 BIUD11 BIUD10 BIUDO9 BIUDO8 BIUDO7 BIUDOG BIUDO5 BIUDO4 BIUDO3 BIUDO2 BIUDO1 BIUDOO gt gt gt gt gt gt gt gt gt gt gt gt gt gt UJ UJ U9 U9 U9 U9 U9
22. SERT P Such Continuous Breath Alben M o pen i m D 1 1 1 1 1 NE 1 j 1 1 i 1 1 1 4 t NER See E es 1 1 i Power MIDI i Switch Audio i Switch Ports Pedals Outs MIDI LCD Continuous Headphones Select Switch Contrast Control Pedals Figure 1 1 PC2 rear panel features Rear Panel Features 1 2 Power Switch Rocker switch to turn the power on and off Power Connector Keyed four pin connector to attach the Kurzweil 9VDC power adapter MIDI Select Switch Slide switch to select the operation of the MIDI Thru Out port This switch is recessed into the rear panel so that it cannot be accidentally changed MIDI Ports In Thru Out and Out ports to connect the PC2 to other MIDI devices to receive pass and send MIDI data LCD Contrast Rotary potentiometer to adjust the LCD for the best visibility Digital Out RCA jack to connect to digital recorders and mixers Switch Pedals Three 1 4 jacks to connect switch pedals that can be assigned to control operations such as sustain sostenuto etc use 1 4 tip sleeve Continuous Control Pedals Two 1 4 jacks to connect pedals that can be assigned to control operations such as volume expression etc use 10KQ linear taper potentiometer 1 4 tip ring sleeve Breath Input A 3 5mm jack to connect a standard breath controller Ribbon Input Modular jack to con
23. Strikes the front and rear key contact on key depression Mounts through the keyboard chassis Figure 4 12 Natural White key 76 note keyboard Pivot location 7 Key spring location Strikes the front and rear key contact key depression Mounts through the keyboard chassis Figure 4 13 Sharp Black key 76 note keyboard 4 22 PC2 PC2X Disassembly Assembly PC2 Keyboard Assembly Natural White Keys 1 Each key has a spring located at the rear of the key Using needle nose pliers slightly pull up the top portion of the spring to release it from the key a N Caution Be careful not to pull up too much which could damage the spring ZN 2 Unlock the key from the pivot anchoring the key to the keyboard chassis To do this insert small flat screwdriver at the back end of the pivot and press toward the front edge of the keyboard While doing so lift the back end of the key where the spring was positioned Use needle nose pliers to pull up the top portion of the spring ge Pivot After the spring is removed insert a small flat screwdriver here to remove the key Spring FO Keyboard chassis section Figure 4 14 Key spring location 76 note keyboard 3 The key should now be free of the pivot Remove the screwdriver 4 Liftthe key up slightly then forward You should be able to feel when the key is free of the pivot A portion of the key hooks onto the keyboard chassis see Figure 4
24. oo 5 J601 2604 J602 e eee e eee eee eee eese Front panel edge screws Figure 4 8 Front Panel Board screw locations Remove the six screws that secure the three PC board clamps two screws per clamp These screws also secure the rear panel edge of the Front Panel Board 4 11 PC2 PC2X Disassembly Assembly Top Enclosure The LCD is mounted onto a bezel that is secured to the Front Panel Board with small pegs that snap into holes on the Front Panel Board Removing the LCD requires cutting the tie wraps that bundle the LCD cables to cable mounts positioned along the rear panel It is not necessary to remove the LCD from the unit Remove the four screws that secure the LCD to the front panel bezel Lift the LCD up from the bezel and fold it over so that the circuit side of the LCD is positioned above the Slider Board For protection place a piece of anti static material between the LCD and Slider Boards Lift the Front Panel Board up from the top enclosure The spinknob and switch button caps should remain in place Caution Each switch button cap uses a set of small pegs to mount the cap to the Front Panel Board The button caps are mounted individually or in clusters If a cap becomes separated from the board be careful that a peg is not inadvertently broken Replacing the Front Panel Board 1 Position the Front Panel Board onto the top enclosure then raise the top enclosure up
25. 1 18 S40 TACT 48 TACT 55 S63 TACT Legend Sound Setup Select top row bottom row middle row column left to right Zone Parameters Sound Source Sound Parameters Midi Parameters Effects Stand Alone Effects LEDs 55512 322 5551 3 2 SSSb4 3 2 SSSb1 3 2 541 TACT 49 TACT S56 TACT S64 TACT 2 3 4 5 SSSb5 32 2 SSSt7 3 2 SSSb6 322 SSSb3 327 2 6 7 00 C D 542 TACT S50 TACT S57 TACT S65 TACT 8 J602 FP BRIDGE 5558 322 SSSb8 3 2 SSSb9 35452 SSSb7 3 2 S43 TACT S51 TACT S58 TACT 566 5551411 322 555110 322 SSSb10 322 SSSb11 3 2 544 552 59 67 CLEAR 372 Et 3 2 Eb1 3 52 Eb2 3 7 2 545 TACT S53 TACT S60 TACT S68 TACT A o m CANCEL 322 Eb3 3 2 LEDROWO LEDROW1 SWROWO SWROW 1 COL4 554 569 3 2 YOUNG CHANG CO LTD Reproductio
26. 127 129 N051125201 RES TF 2000 1 1 4W 1210 4 R124 130 139 141 N052001223 CAP CER MONO 0 22UF 50V 20 AX 1 C39 N052001712 CAP ELECT 1000UF 25V RAD 1 C30 N052002412 CAP ELECT 470UF 25V 20 2SP 1 C31 N052007401 CAP CER NPO 100PF 50V 5 1206 2 C46 55 N052007503 CAP CER X7R 0 1UF 50V 10 1206 21 C12 13 23 24 29 32 33 35 38 41 42 44 45 48 54 56 N052007810 CAP CER X7R 1000PF 50V 10 0603 21 C1 3 6 8 11 14 22 25 27 47 N052007833 CAP CER NPO 33PF 50V 5 0603 2 04 5 N052901601 CAP ELECT GP 100UF 16V 20 SZC SMT 4 C28 34 36 37 N052901602 CAP ELECT GP 0 197 SP RAD 1000UF 16V 20 1 C40 N052901610 CAP ELECT GP 10UF 16V 20 SZB SMT 1 C7 N053000703 DIODE RECT GP SMT 1A S1A SMA 1N4001 1206 5 D12 14 15 17 22 N053000802 DIODE SWITCH 1N4148 SMT DL 35 14 D1 11 13 16 21 N054000802 TRANSISTOR MMBT2222L SOT 23 4 02 7 9 18 054002906 TRANSISTOR MMBT2907L SOT 23 6 Q1 3 4 8 12 13 N054010301 TRANSISTOR NPN KSC2331 Y 2 Q14 15 N055001505 IND FE BD 2 5 TURN SMT 2 L3 4 N055001509 IND FE BD SMT 200mA 6002 100MHz 0805 2 L1 2 N059010010 XTL 12 2880MHz 50PPM FND PAR 18PF SMT 1 Y1 N061010302 IC LOGIC 74HCU04 SOP14 1 U5 N061014002 IC LOGIC 74HC4051 SOP16 200 1 U11 N061014003 IC LOGIC MC74HC541DW SOP 20 1 U2 N063002302 IC COUPLER 410 1 U7 N064001602 IC LINEAR OPAMP 1 072 SOP8 160 1 U3 N064003508 IC ANA OPAMP DL BIP LO NOIS NE5532A 1 09 064010031 COMPARATOR QUAD LM339 SOIC14 14W 1 U4 N064010804 IC LINEAR 12
27. 57 L C57 T R61 5600pF 5 NPO 1 24K 1 1 16W R53 MMBT2907A 1 2 475 1 1 160 Q4 S E rag 2200pF 5 NPO 464 1 1 16W MMBT2907A PC2 AUDIO OUT hy To Coils ROUT C40 ROUT D2 22UF 16V R35 AGND LL4148 36 1 8W LOUT RESET 1 B4 D5 2 A1 2 1 2 LOUT 3 D1 4 D6 R29 D3 J412 106 p SMOD i 2 1 B Q2 D5 pF 5 MUTE 1 D1 D3 MMBT2222A a L R42 R46 NE5532 C50 R62 3 487 1 1 16W 499 1 1 16W 47 35V 453 1 1 16W 1 1 2 1 2 3 57 11 2 1 2 U27 2 DNS NE5532 co2x 7 R66 5600pF 5 NPO 1000UF 16V 1 24K 1 1 16W R54 1092 sours 1 2 475 1 1 16W C64 C39 U23 1 2 AK4393 en R70 1 2 1 V 47 DVSS CKS2 H R50 1 2 DVDD CKS1 2200pF 5 NPO 464 196 1 16W CLK25 1 C1 2 A1 3 D8 3MCLK CKSO RESET 1 B4 D5 2 A1 3 D1 4 D6 4PD 5 3 DACBCLK 2 8 VCOM EE ae DACDATA 2 A8 SSDATA AOUTR 11 DACL 2 A8 Zi RCK AOUTR en nae 8 NE5532 DACMUTE 1 C1 C4 SMUTE AOUTL C51 R63 487 1 1 16W 499 1 1 16W Iors AOUTL ii ei 35v 453 1 1 1 6w 7 i 2 i 2 5 5 m 10 AVSS 2 ver Ground Join 11 1 AVDD 2 12 T b VDO VREFH 1 24K 1 5600 5 VREFL 475 1 1 16W D 14 pira SVSS 1 2 C76 YOUNG CHANG CO LTD D 2111 11 Reproduction without the express written consent of Young Chang Co Ltd is prohibi
28. 76 N052007503 CAP CER X7R 0 1UF 50V 10 1206 46 C5 615 38 41 43 47 60 63 69 70 73 74 77 81 86 87 91 N052007809 CAP CER NPO 100PF 50V 5 0603 1 C1 N052007833 CAP CER NPO 33PF 50V 5 0603 4 C9 10 12 14 N052080010 CAP CER NPO 1000PF 50V 5 0805 2 C27 N052900747 CAP ELE GP 47UF 35V SZE SMT 5 48 51 68 N052901610 CAP ELECT GP 10UF 16V 20 SZB SMT 8 C39 44 46 64 67 N052901622 CAP ELCCT GP 220UF 10V 20 SZE SMT 1 052902522 ELECT GP 22UF 35V 20 520 SMT 1 C40 N053000703 DIODE GP SMT 1A 1 SMA 1N4001 1206 1 D5 N053000802 DIODE SWITCH 1N4148 SMT DL 35 2 D2 3 N054000102 TRANSISTOR KST3904 SOT 23 1 Q1 N054000802 TRANSISTOR MMBT2222L SOT 23 1 Q2 N054002906 TRANSISTOR MMBT2907L SOT 23 2 03 4 N055001505 IND FE BD 2 5 TURN SMT 2 L1 2 N055001509 IND FE BD SMT 200mA 6002 100MHZ 0805 2 R11 12 N059010060 XTL 20 0000MHz 50PPM FND PAR 18PF SMT 1 Y1 N059010061 XTL 24 576MHz 50 FND FAR 18PF SMT 1 Y2 N061000802 IC LOGIC FAIRCHILD SN74AHCIGO8DBVR 3 U3 4 18 N061000912 IC LOGIC INV TINY UHS UNBUF SOT23 5 2 U12 13 N061007139 IC LOGIC 74VHC139 SOP16 1 U10 N061007144 IC LOGIC 74VHC14 SOP14 150 1 U1 N061011008 IC LOGIC 74AC08 SOP14 150 2 U6 14 N061011245 IC LOGIC 74HC245 SOP20 1 U8 N062004905 IC IF UART ST16C550 W FIFO S PLCC 44P 1 U22 N062004913 IC IF DAC AK4393VF DL 24B DS 5VS VSOP28 1 U23 N062005525 IC MEM FLSH ROM 1MX16 70nS SSOP56 525 5V 1 U5 N062005704 IC GAL 16V8A 15QJ SMT PLCC20
29. A12 A11 A10 A9 AB A7 A6 A5 A4 A3 A2 A1 AO pard ard OD ol EIS RESET 2 A1 3 D1 4 D6 5 C1 U5 1M 2MX16 FLASH ROM NC A21 A20 A19 7A18 A17 A16 A15 A14 A13 A12 A11 A10 A09 NS oo oa VCC 142842 DGND 15 29 44 vec 20 Zee Sis eo Q1 XJ1 DNS BOOT Select 0 1 FC2 CS5_L FC1 CS4 L FCO CS3 L BGACK L CS2 L ERAMCS N BOOT Select 2mm a BG CS1 L BR CSO L FLASHCS MMBT3904 JP1 256KX16 SRAM GND 1234 CSBOOT L PQS7 TXD T UDSCLK pipe _L pso 22 PPE FREEZE QUOT FREEZE PWMB 4 PWMA K CLKOUT ES XTAL 8 r 100 VCC _ GND NC 11 19 25 37 47 61 72 86 89 109 121 135 144 2 12 20 26 35 48 54 62 74 82 91 107 120 128 134 1 16 17 18 21 27 34 36 38 53 55 59 73 88 108 123 126 129 J401 BERR DS BKPT VSEE1 FREEZE VSEE2 FTECH RESET PIPE VCC Do Not Install J402 BUVDD 12V PWRUPRST U4 NC7SZ08 RA
30. slightly to verify that the spinknob and switch button caps are correctly positioned through their openings in the top enclosure Align the center screw holes of the three hole groupings on the front panel edge of the board with the thread marks in the extrusion and install the two screws that secure the front panel edge See Figure 4 8 Place a PC board clamp in position Align the center screw holes of the clamp with the thread marks in the extrusion and install the two screws that secure the clamp Repeat for the other two clamps Position the LCD onto the front panel bezel and install the four screws that secure it to the bezel Connect the wire trap flat ribbon cables in the following order Caution Be sure to look for the marking on the edge of the cable denoting Pin 1 and that you match it correctly with Pin 1 on the board Make certain that the wires are straight prior to inserting them into the connector and that each wire is correctly inserted into its respective position Note Be sure the sides of the connector are lifted Insert the flat ribbon cables into the wire trap connectors and push down the sides of each connector to lock the cable into the connector Gently pull each cable to verify that it is locked into its connector Insert the five wire flat ribbon cable from the Button Board into the wire trap connector at J601 on the Front Panel Board Insert the eight wire flat ribbon cable from the Slider Board into the wire
31. 6 Front Panel cui ses n fd p ei ad ec re Henn 1 7 Chapter 2 Diagnostics Diagnostic Tests M Qn 2 1 Entering Diagnostics eene ennt 2 2 Diagnostic Test Mod s onte eee Ueber rude Ks beo ni dives 2 2 Run One EA 2 2 e et Dh terae oe cote e hei er Dae 2 3 Test Results anemeunn epo tiber reet Hiec iiie rp 2 3 Description of Tests esent 2 4 dibattito npe 2 4 Ed c lines 2 4 du du c oUm 2 4 MABEL e Duns idend conta Dream 2 4 2 4 SOvind ROM CM 2 4 2 5 MI rot Serie a Re 2 5 at n x UE 2 5 PCX I ROM sense 2 5 POXSIL RWisensusth aen Ue dt Od E hu 2 5 POXSL RAMS 2 5 PEX T MADE 2 6 PCX TSROM nasse im e te chats codes tones p Go ede 2 6 Chapter 3 PC2R Disassembly Assembly Introductions reed ated eie tei re ee tee ee t 3 1 Cables Cothectots c 28 27 evt tct aste 3 1 Flat Ribbon tees er A E 3 1 Cable Routing Era ied eee aset he HR RENS 3 1 Requir
32. Disassembly Assembly Opening the PC2R Opening the PC2R Removing the Top Cover Before you begin disassembly please be sure that the power is off and that the AC power adapter and all other cables are disconnected The top cover is secured to the PC2R with seven screws three on the top one on each side and two on the rear See Figure 3 1 Figure 3 1 PC2R top cover 1 Remove the seven screws that secure the top cover Figure 3 2 Removing the top cover 2 Refer to Figure 3 2 Slide the top cover back from the Front Panel Assembly to release the top cover from the bottom enclosure and place the top cover safely aside to avoid damage Replacing the Top Cover 1 Place the top cover in position and slide it toward the Front Panel Assembly 2 Install the seven screws that secure the top cover See Figure 3 1 PC2R Disassembly Assembly Opening the PC2R Removing the Connector Board 1 10 11 Following Steps 2 5 disconnect the cables listed in Table 3 1 Ref Name Cable Type Destination J301 PC2 Power stranded wire Engine Board J302 PC2R Audio In flat ribbon Engine Board J303 MIDI CPU flat ribbon Engine Board J304 Front Panel flat ribbon Right Front Panel Board J322 FP Vol Pwr Hp stranded wire Headphone Vol Pwr Sw Board Table 3 1 Connector Board cables Disconnect the stranded wire cable from J301 on the Connector Board Remove the cable locking clip and disconnect t
33. If the unit you are servicing has a PCX 1 Board follow the procedure on page 4 13 to install it 9 Follow the procedure on page 4 8 to install the left enclosure support wall Removing the Mod Wheel Assembly 1 Refer to Figure 4 11 on page 4 19 Slide the left side of the unit forward off of your work surface so that you can access the four screws and washers securing the assembly to the bottom enclosure Remove the four screws and washers Slide the unit back onto your work surface Lift the Mod Wheel Assembly up approximately two inches Nylon reinforced tape secures the Aftertouch flex cable s to the bottom enclosure Peel back the tape from one side and disconnect the cable s Note If you are servicing a PC2 one flat flex cable attaches to the Mod Wheel Assembly location J202 If you are servicing a PC2X two flat flex cables attach to the Mod Wheel Assembly locations J202 and J203 4 17 PC2 PC2X Disassembly Assembly Top Enclosure 4 The flat ribbon cables connected to the two boards on the Mod Wheel Assembly use wire trap connectors The shielding has been removed from the end of these cables to expose the wires The wires are inserted directly into these connectors From the Mod Wheel Assembly disconnect the flat ribbon cable from J201 on the Wheels Board This cable connects to J308 on the Connector Board From the Mod Wheel Assembly disconnect the flat ribbon cable from J701 on the IBBB Board This cable
34. LISA Sound ROM e e MIDI e LED If a PCX 1 Board is installed the following tests are also available e PCX 1 ROM e PCX 1 RW e PCX 1 RAM e 1 MABEL e PCX 1SROM Warning Some diagnostic tests erase user programs and setups If possible be sure to save all user programs and setups before entering diagnostics For instructions refer to Saving User Data in Chapter 5 page 5 1 Diagnostics Entering Diagnostics Entering Diagnostics 1 Apply power to the unit When the Please wait message appears in the LCD quickly press and release the Panic button for PC2 keyboard units or the Edit button for PCR rack units The LCD should display the following Main menu Install engine Figure 2 1 LCD example entering diagnostics Press either the Left or Right cursor button until Fun 4133051165 appears in the LCD Press the Enter button The LCD displays the following Main menu Eun one test Figure 2 2 LCD example diagnostic main menu Press Enter to select the run one test mode To select the run burn in test mode press either the Left or Right cursor button then press the Enter button to begin the tests Diagnostic Test Modes Run One Test Run One Test allows you to select an individual test or to step through and run each available test To step through the different tests use the Left or Right cursor button Press the Enter button to select the test Select tezt to run t
35. MIDI Ports In Thru Out and Out ports to connect the PC2 to other MIDI devices to receive pass and send MIDI data MIDI Select Switch Slide switch to select the operation of the MIDI Thru Out port Power In Keyed four pin connector to attach the Kurzweil 9VDC power adapter PC2R Front Panel Figure 1 8 is an illustration of the front panel for the PC2R Enlargements of sections of this illustration follow as well as a brief description of the front panel features Power Volume Performance 1 Performance zone1 Zone 2 Zone 3 Zone 4 KURZWEIL WT Peformance m PC2R Fait amp ORO L D Figure 1 8 PC2R Front Panel 1 6 LCD Contrast Introduction PC2R Front Panel Features Power Volume Push to turn the power on off and turn it to adjust the volume Headphones Standard 1 4 jack to connect headphones Performance section The buttons and knobs in this section are multi function and their operation depends on which performance mode is active Internal Voices KB3 or MIDI Setups Their labelling is color coded to identify their operation for each of the performance modes They are labelled as follows white Internal Voices mode blue MIDI Setups mode and orange KB3 mode mussPWR erformance Zone 1 Zone 2 Zone 3 Zone4 O Solo Main Layer Split Split tare Ro
36. U9 UJ U9 UU U9 UJ U2 UU UJ UU UU UJ UU UU UU UJ UJ C9 vv vvv DMDOO DMDO1 DMDO2 DMDO3 DMD04 DMDO5 DMDO6 DMD07 DMD08 DMDO9 DMDO7 DMDO6 DMDO5 DMDO4 DMDO3 DMDO2 DMDO1 DMDOO 102 109 MDMD 00 113 SDMD 05 108 SDMD 07 106 FOUR DECOUPLING CAPS ON U9 amp U11 ONE ON EACH SIDE MDMDI05 108 MDMD 03 110 MDMDJ 02 111 MDMDJ 01 112 MDMD 06 107 MDMD 04 MDMD 10 103 MDMD 09 104 MDMDI 08 105 MDMD 07 106 SDMD 03 110 SDMD 04 109 SDMD 06 107 SDMD 08 105 SDMD 09 104 SDMD 10 103 SDMD 00 113 SDMD 01 112 SDMDJO2 111 MDMD 11 gt gt gt gt gt gt gt gt CD 15 00 1 A8 3 A1 4 C6 MD 15 00 4 C1 2 Y o SDMD 05 4 MDMD 05 SDMD 03 MDMD 03 SDMD o2 7 MDMD 02 SDMD 01 MDMD o1 4 1 x 13 U DO NOT INSTALL SMT2 5T 2 ADCDATA J407 SDMD 11 4 MDMD 11 4 SDMD 10 MDMD 10 D DATA SGND1 SDMD 09 MDMDJ 09 ADCBCLK BITCLK SGND2 SDMD 08 9 MDMDJ 08 S YOUNG CHANG CO LTD ADCL R L R SGND3 ADCMCLK MCLK SGND4 Reproduction without the express written consent DO NOT INSTALL 3194 VCC DGND 7 35 of Young Chang Co Ltd is prohibited 5Vana NC SDMD 07 MDMDJ 07 14 5Vana AGND SDMD 06 MDMD 06 METER PT SDMD 04 MDMDJ 04 12V 00D SDMD 0O MDMDJ oo Filename P82RDV4 Date 9 19 2000 DO NOT IN
37. boot block for keyboard models br boot block for rack models bp boot block for Polyphone Expansion PCX 1 option keyboard and rack units k operating system software for keyboard models r operating system software for rack models p operating system for Polyphony Expansion PCX 1 option keyboard and rack models s soundware data for keyboard and rack models sp soundware data for Polyphony Expansion PCX 1 option keyboard and rack models Installing the Operating System or Setups y Warning This procedure requires performing a hard reset All user programs and setups will be 7 erased Before continuing be sure to save all user programs and setups 1 Connect a MIDI cable from the MIDI Out port of the computer interface or sequencer to the MIDI In port on the PC2 Open the first MID file using the sequencer program Turn on the PC2 and follow the procedure to enter the Boot Block Press the Enter button to select Install engine Press the Enter button to select MIDI D cR The LCD shows for MIDI Start playing the MIDI file from the sequencer While a file is loading the bottom line of the display shows the progress If the display continues to show Waitin for MIDI after starting the sequencer stop and restart the sequence 7 After the file is loaded the display will show done 8 If you have additional files to load open the file from the sequencer and begin playing it 9
38. function in each of the performance modes They are labelled as follows white Internal Voices mode blue MIDI Setups mode and orange KB3 mode Zone Parameters Sound Parameters System MIDI Xmit Program Key Range Transpose Timbre Envelope LFO Global MIDI Recv Panic Functions Velocity Controllers Arpeggiator Compare Copy Store Sound Source Internal User Exp 1 Exp2 14 Figure 1 4 PC2 Front Panel center section LCD Forty character two line liquid crystal display Cursor buttons These buttons move the cursor bar in the LCD Generally they select bank and program ID parameters and some settings Zone Parameters Each button in this section represents a menu of available parameters for use while editing setups Sound Source Each button in this section selects a bank of programs or setups for each of the performance modes Sound Parameters Each button in this section represents a menu of available parameters for use while editing programs in the Internal Voices and KB3 modes Functions Use the buttons in this section while editing programs or settings to compare between an original and a modified setup or program copy sections from one setup to another and begin the process to store the changes System The three buttons in this section se
39. key should now be free of the pivot Remove the screwdriver Lift the key up slightly then forward You should be able to feel when the key is free of the pivot The front edge of each key hooks under the keyboard chassis Be sure the key is not hooked under the keyboard chassis prior to lifting the key completely off 4 29 PC2 PC2X Disassembly Assembly PC2X Keyboard Assembly Replacing 1 20 D The following instructions apply to both natural and sharp keys Note Always replace a sharp key before replacing the adjacent natural keys Hook the front end of the key under the keyboard chassis Check that the mounting peg is correctly positioned Lower the key into position Align the pivot with the hole at the rear of the key Push down on the key It should snap into position onto the pivot Install the spring Servicing the Keyboard Contact Boards 1 Place the keyboard upside down on a flat soft surface Be sure that the keys are resting on a soft surface to avoid scratching or other damage The Treble and Bass Contact Boards are now visible Removing the Treble Contact Board 1 Disconnect the flat ribbon cable that connects the Treble Contact Board to the Connector Board The connector is secured with tape Peel back the tape to free the cable Disconnect the small ribbon cable that connects the Treble and Bass Contact Boards Remove the 26 screws that secure the Treble Contact Board
40. keys and key springs 4 33 PC2 PC2X Disassembly Assembly PC2X Keyboard Assembly 4 34 Chapter 5 Troubleshooting Introduction Cables Connectors Flat Ribbon Cables flat ribbon cables with connectors are keyed and therefore cannot be reversed Most flat ribbon cables have locking cable clips Be sure to reapply the clips when connecting cables Flat ribbon cables that connect to picoflex connectors do not have locking cable clips Some flat ribbon cables have exposed wires that insert directly into a wire trap connector When disconnecting and connecting these cables you must look for the marking on the edge of the cable denoting Pin 1 and be sure that you match it correctly with Pin 1 on the board Cable Routing In some cases tape secures cable connections or fastens cables to the bottom enclosure Always peel back the tape from one side when disconnecting cables so that the tape remains properly positioned Surface Mount Devices The removal and replacement of surface mount devices requires training and the proper equipment If you do not have the training or equipment to remove or replace surface mount devices contact the service department to order a board replacement International service technicians should contact their appropriate Young Chang Distributor Saving User Data 1 2 Set up a MIDI recording device Connect the a MIDI cable to the MIDI Out port of the PC2 to the MIDI In port on the externa
41. of an individual test the LCD displays the test results An expected result is Pass Fail or Not Run If a failure occurs the LCD displays Fail To the right of Fail two characters can be displayed in parenthesis These characters indicate the type of failure If the test fails a t is displayed If a hardware error occurs an H is displayed 2 3 Diagnostics Description of Tests Description of Tests ROM This test checks the software data engine boot and setups stored in FlashROM on the Engine Board A failure of this test may indicate a problem with the Flash ROM chip U5 on the Engine Board associated circuitry or the Engine Board Read write RAM This test is a combination of the RAM MABEL and LISA tests The Read write test writes data to RAM and the MABEL and LISA registers then confirms that the data written can be read back successfully A failure of this test indicates a problem with the Engine Board The RAM test writes to the microprocessor RAM space and verifies that the write was successful A failure of this test may indicate a problem with the RAM or related circuitry on the Engine Board MABEL LISA This test performs a read write of the MABEL registers and verifies that the data written can be read back successfully A failure of this test may indicate a problem with a related circuitry or the Engine Board This test confirms that the Lisa chip U15 is properly install
42. of the PC2 An illustration of the PC2X has not been LG included because the difference between the two is minimal The only difference is the spacing and quantity of the rear panel screws If you are servicing a PC2 there are seven screws securing the rear panel portion of the top enclosure to the bottom enclosure If you are servicing a PC2X there are nine screws PC2 PC2X Disassembly Assembly Opening the PC2 PC2X IL Figure 4 4 Top cover and bottom enclosure Warning Be sure to have your work surface prepared This includes placing foam blocks behind the unit When the top enclosure is removed place it on the foam blocks to avoid damaging the Alpha Wheel control panel buttons and sliders The following procedure requires enough room behind the rear of the unit to place the top enclosure face down on your work surface 6 Grip each end of the top enclosure and rotate it back approximately two inches This separates the bottom edges of the top enclosure and bottom enclosure 7 Liftthe top enclosure straight up 8 Turn the top enclosure over and place it face down onto your work surface N Caution Table 4 1 lists the cables by board location from the top enclosure to the assembly they connect to the bottom enclosure You do not need to disconnect these cables Top cover Assembly Bottom Enclosure Connector Board Keyboard Assembly Connector Board Keyboard Assembly FP Board Button Board Wheel Assembly Con
43. of the keyboard and keyboard wooden spacer screws Both sets of screws are accessible from the bottom enclosure keyboard front screws Keyboard N re 000 m i E E USES o 9 lt 0 oars o 77776 front 1 1 o9 9 wooden spacer screws o f 1 1 o o rear o o o o0 o o o m Oc 5 a EE 9 le ogon o Je 6 Access panel j S as o UM ENS 27 Rear panel N ner m keyboard rear screws Figure 4 11 PC2 76 note keyboard bottom 2 Tilt the PC2 up and remove the four keyboard rear screws then lay the PC2 flat on your work surface 3 Move the PC2 forward so that the front hangs over the edge of your work surface giving you access to the remaining screws 4 Remove the four keyboard front screws 5 Remove the four Mod Wheel screws and washers At this point the keyboard is loose in the bottom enclosure but it has cables connected to the Mod Wheel Assembly the Connector Board and the Front Panel Board 6 Slide the PC2 back onto your work surface 4 19 PC2 PC2X Disassembly Assembly PC2 Keyboard Assembly 20 4 20 10 11 12 Lift the Mod Wheel Assembly and disconnect the Aftertouch flex cable This cable has nylon reinforced tape securing it to the bottom enclosure Peel back the tape from one
44. secure the Left Front Panel Board to the mounting bracket Refer to Figure 3 6 This illustration shows the location of a soldered connection between the Left Front Panel and Headphone Volume Power Switch Boards To remove the board desolder this connection from the Left Front Panel Board Note This illustration shows the Headphone Volume Power Switch Board lying flat to indicate the connection between it and the Left Front Panel Board In its normal position it is perpendicular to the Left Front Panel Board 6 PC2R Disassembly Assembly Front Panel Assembly Left Front Panel Board HP Vol Pwr Sw Board eee ee eee eee 2 9 E i 05 e J603 e e ee ee ee e elelelelelelele e Circuit 4 J2 soldered connection Figure 3 6 Left Front Panel and Headphone Volume Power Switch Board connection Remove the Left Front Panel Board Replacing the Left Front Panel Board 1 2 2 4 AN _ _ 5 6 Place the Left Front Panel Board in position on the mounting bracket and line up the screw holes Install the two screws that secure the board to the mounting bracket Note Verify that the rotary potentiometers and switch button caps are correctly positioned through their openings in the front panel f
45. sink Carefully lift the board and heat sink out of the PC2R and place them on a flat protected surface PC2R Disassembly Assembly Opening the PC2R Replacing the Connector Board 1 1 000 AOR 10 Tilt down the inner edge closest to the Front Panel Assembly of the Connector Board and heat sink and place it flat on to the bottom enclosure Slide the Connector Board and heat sink toward the rear panel so that the jacks and MIDI switch are positioned through their openings in the rear panel Install the four screws that secure the heat sink to the bottom enclosure Install the three screws that secure the Connector Board to the bottom enclosure Install the two screws that secure the MIDI jacks to the rear panel Install the two nuts that secure the 1 4 audio out jacks to the rear panel Connect the wire trap flat ribbon cables in the following order Caution Be sure to look for the marking on the edge of the cable denoting Pin 1 and that you match it correctly with Pin 1 on the board Make certain that the wires are straight prior to inserting them into the connector and that each wire is correctly inserted into its respective position Note Be sure the sides of the connector are lifted Insert the flat ribbon cables into the wire trap connectors and push down the sides of each connector to lock the cable into the connector Gently pull each cable to verify that it is locked into its connector Insert the fiv
46. the flat ribbon cables into the wire trap connectors and push down the sides of each connector to lock the cable into the connector Gently pull each cable to verify that it is locked into its connector Insert the seven wire flat ribbon cable from the Connector Board into the wire trap connector at J101 on the Slider Board Insert the eight wire flat ribbon cable from the Front Panel Board into the wire trap connector at J102 on the Slider Board If the unit you are servicing has a PCX 1 Board follow the procedure on page 4 13 to install it Follow the procedure on page 4 8 to install the left enclosure support wall Removing the Engine Board 1 2 Follow the procedure described on page 4 8 to remove the left enclosure support wall If the unit you are servicing has a PCX 1 Board installed remove it following the procedure described on page 4 13 Following Steps 4 6 disconnect the cables listed in Table 4 4 PC2 PC2X Disassembly Assembly Top Enclosure 1 16 Ref Name Cable Type Destination J402 PC2 PWR stranded wire Connector Board 4403 MIDI amp CPU flat ribbon Connector Board J405 Backlight stranded wire LCD Board J406 LCD flat ribbon LCD Board J412 PC2 Audio Out flat ribbon Connector Board Table 4 4 Engine Board cables The flat ribbon cables connected to J403 and J412 use wire trap connectors The shielding has been removed from the end of these cables to expose the wires The
47. the front panel edge with the thread marks in the extrusion and install the screw that secures the front panel edge See Figure 4 10 Place the PC board clamp in position Align the center screw holes of the PC board clamp with the thread marks in the extrusion and install the two screws that secure the PC board clamp Connect the flat ribbon cable from the LCD to J406 on the Engine Board Be sure to install the cable locking clip Connect the stranded wire cable from the LCD to J405 on the Engine Board Connect the stranded wire cable from the Connector Board to J402 on the Engine Board Connect the wire trap flat ribbon cables in the following order Caution Be sure to look for the marking on the edge of the cable denoting Pin 1 and that you match it correctly with Pin 1 on the board Make certain that the wires are straight prior to inserting them into the connector and that each wire is correctly inserted into its respective position Note Be sure the sides of the connector are lifted Insert the flat ribbon cables into the wire trap connectors and push down the sides of each connector to lock the cable into the connector Gently pull each cable to verify that it is locked into its connector Insert the ten wire flat ribbon cable from the Connector Board into the wire trap connector at J403 on the Engine Board Insert the five wire flat ribbon cable from the Connector Board into the wire trap connector at J412 on the Engine Board
48. this product near water for example near a bathtub washbowl kitchen sink in a wet basement or near a swimming pool or the like 3 This product should be used only with a stand or cart that is recommended by the manufacturer 4 This product either alone or in combination with an amplifier and speakers or headphones may be capable of producing sound levels that could cause permanent hearing loss Do not operate for a long period of time at a high volume level or at a level that is uncomfortable If you experience any hearing loss or ringing in the ears you should consult an audiologist 5 The product should be located so that its location or position does not interfere with its proper ventilation 6 The product should be located away from heat sources such as radiators heat registers or other products that produce heat 7 The product should be connected to a power supply only of the type described in the operating instructions or as marked on the product 8 This product may be equipped with a polarized line plug one blade wider than the other This is a safety feature If you are unable to insert the plug into the outlet contact an electrician to replace your obsolete outlet Do not defeat the safety purpose of the plug 9 The power supply cord of the product should be unplugged from the outlet when left unused for a long period of time When unplugging the power supply cord do not pull on the cord but grasp it by t
49. trap connector at J602 on the Front Panel Board If you have disconnected the flat ribbon cable from J604 reconnect it Be sure to install the cable locking clip Follow the procedure on page 4 10 to install the Connector Board Follow the procedure on page 4 8 to install the right enclosure support wall PC2 PC2X Disassembly Assembly Top Enclosure Removing the LCD Board 1 2 9 Follow the procedure described on page 4 8 to remove the right enclosure support wall Disconnect the stranded wire from location J405 on the Engine Board Remove the cable locking clip and disconnect the flat ribbon cable from 406 on the Engine Board Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable Removing the LCD Board requires cutting the tie wraps that bundle the LCD cables to cable mounts positioned along the rear panel Cut the tie wraps at the cable mounts that the two LCD cables pass through Remove the four screws that secure the LCD to the front panel bezel Lift the LCD Board up and remove it Caution Be sure that the LCD cables are not tangled with other cables routed along the rear panel Replacing the LCD Board 1 2 3 4 2 Place the LCD Board in position face down onto the front panel bezel Install the four screws that secure it to the front panel bezel Connect the stranded wire cable to J405 on the Engine Board Connect the flat ribbon cable to 40
50. weight 4 32 removing contact strips 4 31 removing keys 4 27 removing the keyboard 4 26 replacing a key weight 4 33 replacing contact strips 4 32 replacing keys 4 30 replacing the keyboard 4 27 sharp black keys description 4 29 L LCD Board parts list keyboard models 6 8 parts list rack models 6 15 removing keyboard models 4 13 removing rack models 3 11 replacing keyboard models 4 13 replacing rack models 3 12 LED diagnostic test 2 5 Left Front Panel Board parts list 6 14 removing rack models 3 12 replacing rack models 3 13 LISA diagnostic test 2 4 MABEL diagnostic test 2 4 MIDI diagnostic test 2 5 Mod Wheel scanner tests PC2 5 9 Mod Wheel Assembly parts list 6 8 removing keyboard models 4 17 replacing keyboard models 4 18 P PCX 1 diagnostic test 2 6 PCX 1 RAM diagnostic test 2 5 PCX 1 ROM diagnostic test 2 5 PCX 1 RW diagnostic test 2 5 PCX 1 SROM diagnostic test 2 6 Pedals continuous scanner tests PC2 5 9 switch scanner tests PC2 5 9 Polyphony Expansion Board PCX 1 diagram 3 5 removing keyboard models 4 13 removing rack models 3 5 replacing keyboard models 4 14 replacing rack models 3 5 R RAM diagnostic test 2 4 Read write diagnostic test 2 4 Rear Panel Kurzweil PC2 Series Service Manual diagram keyboard models 1 2 4 4 diagram rack models 1 6 features keyboard models 1 2 features rack models 1 6 Resets Hard Reset 5 2 Soft Reset 5 2 Right Front Panel B
51. wires are inserted directly into these connectors Lift up the sides of each connector This unlocks the trap to free the cable wires Gently pull each cable up out of the connector Note the marking red or black on each cable that indicates the connection to Pin 1 you ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Engine Board Disconnect the stranded wire cables from J402 and J405 Remove the cable locking clip and disconnect the flat ribbon cable from J406 Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable Two of the screws that secure the left enclosure support wall also secure the front panel edge of the Engine Board You have already removed the enclosure support wall but one screw remains securing this edge of the board See Figure 4 10 and remove the remaining screw PC board clamp and screws c oo g qe RIP Jaos Ei 412 ege Front panel edge screw Figure 4 10 Engine Board screw locations Remove the two screws that secure the PC board clamp and rear panel edge of the Engine Board to the top enclosure Remove the Engine Board PC2 PC2X Disassembly Assembly Top Enclosure Replacing the Engine Board 1 2 Place the Engine Board in position on the top enclosure Align the center screw hole on
52. 0 5 1 16W 0603 4 R100 101 126 128 N051064110 RES TF 10KQ 5 1 16W 0603 21 R1 3 9 10 12 14 24 70 77 84 86 108 109 121 144 146 147 149 N051064150 RES 1509 5 1 16W 0603 1 R81 N051064470 RES TF 470Q 5 1 16W 0603 1 118 051100010 RES NET SMAD ISO TOKAS 1 16 5 RP9 13 N051100011 RES NET QUAD ISO 1000 5 1 16W 8 RP1 8 N051101706 RES CF 479 5 1 8W 1206 2 R134 137 N051101708 RES TF 560 5 1 8W 1206 2 R45 6 6 Parts Lists PC2 PC2X Part No Description Qty Reference Designation N051101721 RES CF 2700 5 1 8W 1206 2 R6 83 N051101724 RES 470 5 1 8W 1206 2 R18 117 N051101730 RES CF 1 0KQ 5 1 8W 1206 3 R87 120 148 N051101734 RESTF 1 5KQ 5 1 8W 1206 1 R82 N051101738 RES CF 2 2KQ 5 1 8W 1206 2 R8 66 N051101760 RES CF 20KQ 5 1 8W 1206 1 R80 N051101768 RES TF 680KQ 5 1 8W 1206 3 R76 78 79 N051101780 RES CF 100KQ 5 1 8W 1206 7 R7 15 88 91 150 N051101783 RES TF 200KQ 5 1 8W 1206 1 R145 N051101790 RES CF 1 0MQ 5 1 8W 1206 5 R11 16 71 72 119 N051101794 RES CF 1 5MQ 5 1 8W 1206 1 R63 N051102302 POT R A 10K 12RV03 JUNG POONG 1 R107 N051103073 RES CF 165KQ 1 1 8W 1206 1 R64 N051103121 RES TF 121 1 1 8W 1206 1 R67 N051103151 RES TF 15 00KQ 1 1 8W 1206 8 R122 123 132 133 135 136 138 142 051120030 RES TF 3 0KQ 5 1 8W 1206 3 R106
53. 1 CABLE CONN TO FRONT PANEL 26P PC2R 320mm 1 N013043001 CABLE CONN TO ENG AUDIO 5P PC2R 105mm 1 N022002703 BUTTON SUPPORT DONG A DABS 8R 4 N025223306 TAPPING SCREW 2 BH 3X6 BLK 18 N025224508 TAPPING SCREW 2 BH 3 5 8 WHITE W WASHER 1 N025323306 MACHINE SCREW BH 3X6 BLK 7 N025383306 MACHINE SCREW FH M3X6 SMALL 4 032062301 ENCLOSURE BOTTOM PC2R 1 N032062500 ENCLOSURE TOP PC2R 1 N032064900 HEAT SINK PC2R 1 N125223408 TAPPING SCREW 2 BH 3X8 BLK PLASTIC 2 N039020700 PRESSURE STRIP BOTTOM EDGE PCB PC2R 1 6 16 Chapter 7 Schematics Description Engine Board Microprocessor page 1 of 5 page 7 3 Engine Board Master Slave Mabels page 2 of 5 page 7 4 Engine Board Lisa F X 128Ch Option Clocks page 3 of 5 page 7 5 Engine Board Sound ROM Uart Glue Decoupling page 4 of 5 page 7 6 Engine Board Audio Channel Muting Control page 5 of 5 page 7 7 Front Panel and IBBB Board keyboard models FP Buttons and LEDs page 1 of 2 page 7 8 Front Panel and IBBB Board keyboard models IBBB Buttons and LEDs page 2 of 2 page 7 9 Connector Board keyboard models Scanner page 1 of 3 page 7 10 Connector Board keyboard models Digital Interface page 2 of 3 page 7 11 Connector Board keyboard models Power Supply Audio page 3 of 3 page 7 12 Slider Board keyboard models Sliders page 7 13 Right Front Panel Board rack models FP Buttons and LEDs page 1 of 2 page 7 14 Left
54. 1 U21 N062100410 IC MEM SRAM 256 16 55nS TSOP44 400 LOV 1 U7 PWR N062100416 IC MEMORY DRAM 1MX16 70nS max SOJ42 2 016 17 N064003508 IC ANA OPAMP DL BIP LO NOIS NE5532A 4 U24 27 N083016001 IC MASKROM PC2 BASE HI 830160 001 1 U19 N083016101 IC MASKROM PC2 BASE LO 830161 001 1 U20 N252007456 CAP CER NPO 5600PF 50V 5 1206 8 C52 59 N253000702 DIODE SHTKY SIG 5NS LO C SL BAS40 SOT 23 2 01 4 N262001301 IC MC 68331CPV25 MOTOROLA 1 U2 N266000412 IC CUSTOM MABEL 2 2 9 11 N266000801 IC LISA VY06514 PLCC84 1 U15 N035040105 BATTERY COINCELL 3V 195mah CR2032 TOSHIBA 1 PC2 PC2X Front Panel Board N012400052 Parts Lists PC2 PC2X Part No Description Qty Reference Designation N032009401 FRONT PANEL PCB SUPPORT BRACKET PC 88 1 N035026011 BUTTON SM W LED 3GANG 5 N035026012 BUTTON SM W LED RED PC2 X 1 N035026101 BUTTON LG W LED PC 88 13 N035026141 BUTTON LG W LED 1 2 3 4 PC2 X 1 N035026142 BUTTON LG W LED 5 6 7 8 PC2 X 1 N035026143 BUTTON LG W LED 9 10 11 12 PC2 X 1 035026144 BUTTON LG W LED 13 14 15 16 PC2 X 1 N035026145 BUTTON LG NO LED 3 1 2 3 PC2 X 1 N035026146 BUTTON LG NO LED 3 4 5 6 PC2 X 1 N035026147 BUTTON LG NO LED 3 7 8 9 PC2 X 1 N035026148 BUTTON LG NO LED 3 0 CLEAR 1 N035026149 BUTTON LG NO LED 1 CANCEL PC2 X 1 N035026150 BUTTON LG NO LED 1 ENTE
55. 12 Lifting the back end of the key forward unhooks the key from the keyboard chassis SUAE Keys To remove a sharp key first remove the adjacent natural keys as described in the previous procedure 2 Each key has a spring located at the rear of the key Using needle nose pliers slightly pull up the top portion of the spring to release from the key Caution Be careful not to pull up too much which could damage the spring N 4 3 Unlock the key from the pivot anchoring the key to the keyboard chassis To do this insert a small flat screwdriver at the back end of the pivot and press toward the front edge of the keyboard While doing so lift the back end of the key where the spring was positioned 4 The key should now be free of the pivot Remove the screwdriver 5 Liftthe key up slightly then forward You should be able to feel when the key is free of the pivot A portion of the key hooks onto the keyboard chassis see Figure 4 13 Lifting the back end of the key forward unhooks the key from the keyboard chassis 4 23 PC2 PC2X Disassembly Assembly PC2 Keyboard Assembly Replacing a Key The following instructions apply to both natural and sharp keys 2 Note Always replace a sharp key before replacing the adjacent natural keys 1 Place the key on the keyboard chassis and lower the key into position 2 Align the pivot with the hole at the rear of the key Push down on the key It should snap into pos
56. 16W 0603 2 R64 65 N051064025 RES TF 3300 5 1 16W 0603 1 R32 N051064100 RES TF 1KQ 5 1 16W 0603 T amp R 4 R5 8 34 68 N051064109 RES TF 1MQ 5 1 16W 0603 T amp R 2 R15 16 N051064110 RES TF 10KQ 5 1 16W 0603 T amp R 10 R7 14 17 18 23 25 29 36 37 N051064130 RES TF 1 3KQ 5 1 16W 0603 T amp R 1 R4 051064220 RES TF 2 2KQ 5 1 16W 0603 T amp 2 9 N051064470 RES TF 4 7 5 1 16W 0603 T amp R 3 R2 10 30 N051064472 RES TF 4709 5 1 16W 0603 2 R31 33 N051064820 RES TF 8200 5 1 16W 0603 1 R3 N051066124 RES TF 1 24KQ 196 1 16W 0603 4 R60 61 66 67 N051066453 RES TF 4530 1 1 16W 0603 4 R56 57 62 63 N051066464 RES TF 464Q 1 1 16W 0603 4 R48 51 N051066475 4750 1 1 16W 0603 4 R52 55 N051066487 RES TF 4870 1 1 16W 0603 4 R40 43 N051066499 RES TF 4990 1 1 16W 0603 4 R44 47 N051100010 RES NET QUAD ISO 10KQ 5 1 16W 11 RP1 4 6 12 N051100047 RES NET QUAD ISO 470 5 1 16W 9 RP13 21 N051101701 RES TF 360 5 1 8W 1206 1 R35 N051101706 RES CF 47Q 5 1 8W 1206 1 R70 N051130082 RES TF 8 20 5 1 4W 1210 1 R13 N051130220 RES TF 2200 5 1 4W 1210 2 R19 21 N051130330 RES 3300 5 1 4W 1210 2 R20 22 N052007006 CAP CER NPO 6 8PF 50V 5 1206 2 C11 13 Parts Lists PC2R PC2 PC2X Part No Description Qty Reference Designation 052007406 CER N90 2200PF 50V 5 1206 4 C71 72 75
57. 1TX10X1000 BLK 2 015048236 oo BLK KRYBOARD 1 N022002703 SPACER PUSH LOCKING 8 0MM TALL 4 N022003714 CABLE CLAMP 14P 1 022003720 CABLE CLAMP 20 4 N025224508 TAPPING SCREW 2 BH 3 5X8 WHITE W WASHER 35 N025226508 TAPPING SCREW 2 BH 3 5X8 BLK W WASHER 2 N025323312 MACHINE SCREW BH 3X12 BLK 1 N025323408 MACHINE SCREW BH M4X8 BLK 35 N025323410 MACHINE SCREW BH M4X10 BLK 4 N025323414 MACHINE SCREW BH 4X14 BLK 2 N025328310 MACHINE SCREW 3X10 W WASHER 4 N025328610 MACHINE SCREW BH 4X10 W SFWASHER BLK 8 N032033633 BOTTOM PC2X 1 N032037732 LEFT SUPPORT WALL PC2 X 1 N032037822 RIGHT SUPPORT WALL PC2 X 1 N032038813 CLAMP PCB PC2 X 5 N032038814 BRACKET CLAMPING ENCLOSURE TOP PC2 X 2 N032038815 BRACKET LOCKING ENDCAP PC2 X 2 N032038950 SPACER BLK 2 N03205901 1 PLATE COVER PCB PC2 X 1 N035020711 KNOB ENCODER 1 N03502651 1 LCD DISPLAY LENS PC 88 1 N039004322 CABLE MOUNT BASE DAMD 10 9 N125223408 TAPPING SCREW 2 BH 3X8 BLK PLASTIC 4 N032033522 TOP COVER PC2X 1 6 11 Parts Lists PC2X Part No Description Qty Reference Designation N039040004 BUMPON 3M 4 N052001022 ADAPTER 1 N035027013 CHECK PITCH amp MOD WHEEL 1 N032033713 ENDCAP LEFT 1 N032033813 ENDCAP RIGHT 1 N125223408 TAPPING SCREW 2 BH 3X8 BLK PLASTIC 14 FOR ENDCAPS N125223410 TAPPING SCREW 2 BH 3X10 AN PLASTIC 2 N215040413 KEYBOARD TP 10MDF AFT ABS 1 Keyboard Assembly N215040413 Part No Desc
58. 2301 CABLE KEYBOARD BASS amp TREBLE PC2 X 1 N013042302 CABLE KEYBOARD BASS PC2 1 N013042401 CABLE FRONT PANEL TO CONN BD PC2 X 1 N015048232 FELT 2TX20X1200 BLK KEYBOARD K2500 S 1 N022002703 SPACER PUSH LOCKING 8 0MM TALL 4 N022003714 CABLE CLAMP 14P 1 N022003720 CABLE CLAMP 20P N025153512 TAPPING SCREW 1 TH 3 5 12 BLK N025153520 TAPPING SCREW 1 TH 3 5 20 BLK 16 N025224508 TAPPING SCREW 2 BH 3 5X8 WHITE W WASHER 35 N025323408 MACHINE SCREW BH M4X8 BLK 35 N025323410 MACHINE SCREW BH M4X10 BLK 4 N025323414 MACHINE SCREW BH 4X14 BLK 2 N025328310 MACHINE SCREW 3X10 BLK WI WASHER 4 N032033632 BOTTOM PC2 1 N032037732 LEFT SUPPORT WALL PC2 X 1 N032037822 RIGHT SUPPORT WALL PC2 X 1 Parts Lists PC2 Keyboard Assembly N215040311 Part No Description Qty Reference Designation N032038813 CLAMP PCB PC2 X 5 N032038814 BRACKET CLAMPING ENCLOSURE TOP PC2 X 2 N032038815 BRACKET LOCKING ENDCAP PC2 X 2 N032038950 SPACER BLK 2 N03205901 1 PLATE COVER PCB PC2 X 1 N035020711 KNOB ENCODER 52 1 N03502651 1 LCD DISPLAY LENS PC 88 1 N039004322 CABLE MOUNT BASE DAMD 10 9 N125223408 TAPPING SCREW 2 BH 3X8 BLK PLASTIC 4 N125223410 TAPPING SCREW 2 BH 3X10 AN PLASTIC 2 N032033521 TOP COVER PC2 1 N039040004 BUMPON 3M 4 N052001022 ADAPTER 1 N035027013 CHECK PITCH amp MOD WHEEL 1 N032033713 ENDCAP LEFT 1 N032033813 ENDCAP RIGHT 1 N125223408 TAPPING SCREW 2 BH 3X8 BLK PLA
59. 24414 TAPPING SCREW 2 BH 3X14 BLK 2 N031053800 BRACKET MOUNTING PITCH amp MOD WHEEL PC2 1 N032021811 BUSHING 8 0X26 K2000 1 N032021911 SPRING TORSION MUSIC WIRE 1 N035020311 PITCH amp MOD WHEEL 35 2 N035027013 PITCH amp MOD WHEEL CHEEK 1 Slider Board N012400051 Parts Lists PC2 Part No Description Reference Designation N035026158 BUTTON LG W LED ZONE1 3 4 PC2 4 N035026321 SLIDER KNOB PC 88 5 035026411 SLIDER BEZEL 88 5 N039000701 SLIDE VOLUME FELT 0 3TX12X70 5 N041032307 CONN WIRE TRAP 2 00mmSP 7P 52147 0710 1 J101 N041032308 CONN WIRE TRAP 2 00mmSP 8P 52147 0810 1 J102 N043003703 SW TACT SPST 6mmX6mm 160GF ALPS SKHWAC 4 S14 045010610 LED MINI RED GREEN DIFUSSED T1 DKL 30RGM 4 D1 4 N051101502 SLIDER VOLUME SINGLE 10KB LIN 45mm 5 R1 5 N053000801 DIODE 1N4148 DO 35 4 D5 8 PC2 Final Assembly N012000150 Part No Description Qty Reference Designation E207407181 DOUBLE SIDE TAPE 3M BMMX50M 467 0 01 N013030951 CABLE TIE 13 N013041601 CABLE SLIDER TO FRONT PANEL 8P PC2 X 1 N013041701 CABLE SLIDER TO CONN BD 7P PC2 X 1 N013041801 CABLE ENGINE TO CONN BD 10P PC2 X 1 N013041901 CABLE ENGINE TO CONN BD 5P PC2 X 1 N013042001 CABLE WHEEL TO CONN BD 6P PC2 X 1 N013042101 CABLE BUTTON BD TO FRONT PANEL 5P PC2 X 1 N013042201 CABLE ENGINE TO CONN BD POWER PC2 X 1 N01304
60. 4 22 removing the keyboard 4 19 Disassembly instructions 88 note Keyboard Assembly contact boards 4 30 removing a key weight 4 32 removing contact strips 4 31 removing keys 4 27 removing the keyboard 4 26 Disassembly instructions keyboard models bottom enclosure 76 note keyboard 4 2 bottom enclosure 88 note keyboard 4 3 Connector Board 4 8 Enclosure Support Walls 4 8 Engine Board 4 15 Front Panel Board 4 10 LCD Board 4 13 Mod Wheel Assembly 4 17 Polyphony Expansion Board PCX 1 4 13 Slider Board 4 14 top enclosure 4 4 Disassembly instructions rack models Connector Board 3 3 Engine Board 3 6 Headphone Volume Power Switch Board 3 14 LCD Board 3 11 Left Front Panel Board 3 12 Polyphony Expansion Board PCX 1 3 5 removing the front panel assembly 3 8 removing the front panel faceplate 3 9 Right Front Panel Board 3 10 Top Cover 3 2 E Enclosure Support Walls removing keyboard models 4 8 replacing keyboard models 4 8 Engine Board cables keyboard models 4 16 cables rack models 3 6 diagram keyboard models 4 16 parts list 6 3 removing keyboard models 4 15 removing rack models 3 6 replacing keyboard models 4 17 replacing rack models 3 6 Entering Diagnostic Tests 2 2 F Final Assembly parts list 76 note keyboard models 6 9 parts list 88 note keyboard models 6 11 parts list rack models 6 16 Front Panel diagram keyboard models 1 3 1 4 1 5 diagram rack models 1 6 1 7 1 8 features keyboard models 1 3 featur
61. 4201 E 9 S keyboards only Wheels Chapter 6 Parts Lists Introduction e The parts lists included in this chapter cover all models of the PC2 series Some printed circuit boards and assemblies are used in more than one model Therefore the parts lists on the following pages are listed under these headings PC2R PC2 PC2X All Models PC2 PC2X Keyboard Models PC2R Rack Model The following two tables list the printed circuit boards and assemblies by model Note The PC2 and PC2X have been combined as these two models share most printed circuit boards and assemblies in common The exceptions are the parts lists for the Final and Keyboard Assemblies PC2 PC2X Printed Circuit Boards and Assemblies Part No Description Page N012000150 Final Assembly PC2 page 6 9 012000151 Final Assembly PC2X page 6 11 012103800 LCD Board page 6 8 012300051 6 3 012300053 Pitch amp Mod Wheel Assembly page 6 8 012300061 Connector Board page 6 6 012400051 Slider Board page 6 9 012400052 Front Panel Board page 6 5 N215040311 Keyboard TP 8R AFT 76 Note page 6 10 N215040413 Keyboard TP 10MDF AFT 88 Note page 6 12 Parts Lists Introduction PC2R Printed Circuit Boards and Assemblies Part No Description N012000153 Final Assembly page 6 16 N012103802 LCD Board page 6 15 N012300040
62. 45 49 53 57 59 61 63 d YOUNG CHANG CO LTD D Reproduction without the express written consent of Young Chang Co Ltd is prohibited PC88 II ENGINE SOUND ROM UART GLUE DECOUPLING Filename P82RDV4 Date 9 19 2000 By T THOMPSON Sht4 of5 Kurzweil PC2 Series Service Manual C52 5600pF 5 NPO 1112 R40 R44 NE5532 C48 R56 487 1 1 16W 499 1 1 16W 47uF 35V 453 196 1 16W 1 1 2 1 2 1172 1 2 3 U26 2 NE5532 Z L C56 R60 5600 5 NPO 5 R52 120K 1 WOW 475 1 wew 5VANA R48 2200pF 5 NPO 464 1 1 16W C53 5600pF 5 NPO 1112 R41 R45 NE5532 C49 R57 487 1 1 16W 499 1 1 16W 47uF 35V 453 1 1 16W 7 1 2 1 2 5 11 2 1 2 d n U26 6 B NE5532
63. 5 005 SMA A04 D04 A04 D04 Vds E A03 Dos 21 8MDI A03 pos 21 VOU Ugo SMA A02 002 02 002 CA 20 00 1 A8 2 A1 3 A1 ST16C550CJ44 b A01 por 12 A01 Do1 12 CAJ02 m A00 Doo A00 Doo CA 01 BRUDOUT VCC 23 VCC 23 00 RCLK DGND 1332 DGND 1332 SIN SMD 15 00 2 08 CSO UE TWE 1 4 5 2 1 3 1 J409 J410 ROM Option vec ROM Option vog CD 15 00 1 8 2 1 3 1 2 2 b A23 1 A23 SMA A22 VCC2 34 A22 VCC2 21 VCC3 A21 VCC3 TROG 1 B1 C3 SMA A20 A20 SMA EUM A19 A19 SMA RE ae IRQ 1 B1 C3 SMA 16 015 A16 015 RESET I S 19 15 14 20 A15 014136 _ SE gm MA 013 A14 D13 A13 012 A13 0 2 E A12 011 A12 011 SMA Ai DO 010 b 10 09 43 SMD 10 09 48 __ SMD SMa A09 008 A09 E 1 A3 2 LGDE 1 06 SMA 46 007 146 LCDCS 1 B3 D6 3 1 C4 A07 006 07 006 SIZ1 1 A3 2 1 04 IK gt A06 005 28 SMDI A06 005 48 ene 120 1 3 Sma A05 004 A05 004 2 PA Do3 91 SMDI A04 lt SMA A03 002 A03 d b A02 DO01 24 SMD O1 g 2 Dot 24 SMD RESET 1 B4 D5 2 A1 3 D1 5 C1 A0 000 A01 000 DASS DR 1 EXROMOCS CS cs SMWE 2 A6 B8 WE PRSNT WE PRSNT ROMTPR 1 1 SMOE 2 A8 OE DGND 1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 596163 DGND 1 5 9 13 17 21 25 29 33 37 41
64. 6 on the Engine Board Be sure to install the cable locking clip Position the LCD cables at the cable mounts on the rear panel and install new tie wraps through the cable mounts to bundle the cables Caution Be sure that you have bundled the LCD cables with the other cables positioned at the cable mounts Follow the procedure on page 4 8 to install the right enclosure support wall Removing the Polyphony Expansion Board PCX 1 The Polyphony Expansion Board is mounted on to the Engine Board and held in place with four nylon PC board standoffs and a 24 pin female header on the underside of the board 1 2 Follow the procedure described on page 4 8 to remove the left enclosure support wall Squeeze the top of one of the four nylon PC board standoffs and lift the corner of the board until it clears that standoff Repeat for the other three standoffs When the board is free of the standoffs lift the board straight up to disconnect the 24 pin connector from the Engine Board 4 13 PC2 PC2X Disassembly Assembly Top Enclosure Replacing the Polyphony Expansion Board PCX 1 1 3 Place the PCX 1 Board over the four standoffs This should properly position the 24 pin connector over the 24 pin header on the Engine Board Press the PCX 1 Board down securing the 24 pin connector and snapping the board onto the standoffs Note If you are installing a new PCX 1 Board check the old board for Sound ROM options If
65. 601 and J602 use wire trap connectors The shielding has been removed from the end of these cables to expose the wires The wires are directly inserted into these connectors Lift up the sides of each connector This unlocks the trap to free the cable wires Gently pull each cable up out of the connector Note the marking red or black on each cable that indicates the connection to Pin 1 you ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Front Panel Board Remove the cable locking clip and disconnect the flat ribbon cable at J604 on the Front Panel Board Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable Note The flat ribbon cable at location J604 was disconnected following the procedure to remove the Connector Board It is not necessary to disconnect it from the Front Panel Board However if you are replacing the Front Panel Board with a replacement board be sure to disconnect the cable and connect it to the replacement board Five of the screws that secure the right enclosure support wall also secure the front panel edge of the Front Panel Board You have already removed the enclosure support wall but two screws remain securing this edge of the board See Figure 4 8 and remove the two remaining screws PC board clamps and screws 1 t i 4 qe oo oo oo oo
66. Battery 1 Qr m coms Position the battery over the holder so that the positive terminal is pointing to the Engine Board Slide the battery into the holder and apply slight pressure until it snaps into place If the unit has Sound ROM options install them Place the top cover in position and slide it toward the Front Panel Assembly Install the seven screws that secure the top cover Troubleshooting Scanner Tests Scanner Tests PC2R Rack Models The Scanner Tests for the PC2R rack model include separate tests for the front panel buttons and LEDs rotary potentiometers including Knobs A D and Volume and the Alpha Wheel To enter the Scanner Tests first turn on the PC2R Once the PC2R is on and ready to play simultaneously hold down the three buttons located in the top row of the Modes section Internal Voices KB3 and MIDI Setups All front panel LEDs will light in a sequence and the LCD will display the following SCHM1 3 B 23 8 W 125 WOL SLIDER 25 Figure 5 2 LCD example PC2R scanner tests The first line of the display shows the scanner software version the battery voltage and the current value for the Mod Wheel position Disregard the Mod Wheel value it is applicable only to keyboard units The second line shows the results of the current test Figure 5 2 shows the result of the volume potentiometer test To exit the Scanner Tests and return to normal operation simultaneously press the Cancel and Ent
67. C17 22 25 27 47 N052007833 CAP CER NPO 33PF 50V 5 0603 2 C45 N052901602 CAP ELECT GP 0 197 SP RAD 1000UF 16V 20 6 1 C40 6 13 Parts Lists PC2R Part No Description Qty Reference Designation N053000703 DIODE GP SMT 1 1 SMA 1N4001 1206 4 D14 15 17 22 N053000802 DIODE SWITCH 1N4148 SMT DL 35 2 D13 21 N054000802 TRANSISTOR MMBT2222L SOT 23 3 Q7 9 18 N054002906 TRANSISTOR MMBT2907L SOT 23 4 Q4 8 12 13 N054010301 TRANSISTOR NPN KSC2331 Y 2 Q14 15 N055001505 IND FE BD 2 5 TURN SMT 4 11 4 N059010010 XTL 12 2880MHz 50 FND PAR 18PF SMT 1 Y1 N061010302 IC LOGIC 74HCUO4 SOP14 1 05 061014002 IC LOGIC 74HC4051 SOP16 200 1 U11 N063002302 IC COUPLER PC410 SOP6 170 1 U7 N064003508 IC ANA OPAMP DL BIP LO NOIS NE5532A 1 U9 N064010804 IC LINEAR 12V LM79L12 SOP8 1 N064010805 IC LINEAR 5V KA78T05 5V 3A TO 220 1 VR1 N064010806 IC LINEAR 12V LM78M12 TO 220 1 VR2 N215000105 SCHOTT TRANSFORMER 67129600 1 L5 N262100608 IC MICROCONTROLLER M37451M8 731FP 1 U1 Front Panel Assembly N012300070 Part No Description Qty Reference Designation N025323306 MACHINE SCREW BH 3X6 BLK BRACKET CLAMPING PCB amp FRONT LEFT amp RIGHT N025383306 MACHINE SCREW FH M3X6 SMALL 4 FRONT PANEL amp BRACKET CLAMPING PCB N031063100 BRACKET CLAMPING PCB PC2R 1 N035033900 LCD DISPLAY LEN PC2R 1 N032027426 FRONT PANEL PC2R 1
68. C2 Rack Connector PCB POWER SUPPLY AUDIO Filename 021250B3 Date 9 29 2000 B By D O Neill Note on signal polarity Line out TIP Headphone out and Digital positive going signal The Digital out is inverted with respect to the output of the DAC Sht3 of 3 Rev 7 18 VR1 Power sw Volume control Do not connect these pins Kurzweil PC2 Series Service Manual E Headphone PC2R FRONT PANEL VOL PWR HPhones Front Panel Bridge 2 2 5vref AVSS J3 YOUNG CHANG LTD Reproduction without the express written consent of Young Chang Co Ltd is prohibited PC2R Power Volume Headphone PCB Filename 121262B1 Date 12 7 2000 Eng By Fran Turner Mfg Sht 1 of 1 Doc 021262 Rev BV1 7 19 Kurzweil PC2 Series Service Manual 7 20 A Alpha Wheel Test scanner tests PC2 5 8 scanner tests PC2R 5 7 Assembly instructions 76 note Keyboard Assembly connecting the keyboard 4 21 contact boards 4 24 replacing contact strips 4 25 replacing keys 4 24 replacing the keyboard 4 20 Assembly instructions 88 note Keyboard Assembly contact boards 4 30 4 31 removing a key weight 4 33 replacing contact strips 4 32 replacing keys 4 30 replacing the keyboard 4 27 Assembly instructions keyboard models bottom en
69. Connector Board page 6 13 012300051 6 3 012300070 Front Panel Assembly page 6 14 N012300080 Left Front Panel Board page 6 14 N012300090 Right Front Panel Board page 6 15 N012700019 Headphone Volume Power Switch Board page 6 15 PC2R PC2 PC2X Engine Board N012300051 Parts Lists PC2R PC2 PC2X Part No Description Qty Reference Designation N035040201 BATTERY HOLDER TOSHIBA BV 32 PC 88 1 J411 N041010401 SHUNTS JUMPER 2mm DIGI KEY SPE1302 ND 1 Q JP1 041021264 SOCKET SIMM 22 5D 64P LEFT METAL 2 J409 410 N041025308 HEADER 156 SP 8P 09 65 2088 1 J402 N041030040 HEADER 2mm SQR 3P R A SAMTEC 1 JP1 N041030124 HEADER DUAL 2 0mm 24P MOLEX 87089 2416 1 J408 N041030150 HEADER DUAL 0 1 SQR 50POS DIGIKEY 1 J404 N041031210 CONN 1 SP DUAL ROW 14P 057 014 153 1 J406 N041032305 CONN WIRE TRAP 2 00mmSP 5P 52147 0510 1 J412 N041032310 CONN WIRE TRAP 2 00mmSP 10P 52147 1010 1 J403 N041034002 HEADER 098 SP 2P 22 03 5025 1 J405 N042005422 JUMPER WIRE 2 5MM 1 JP2 PINS 1 amp 2 N051102103 RELAY 5V DPDT G6H 2 DC5 2 RY1 2 N064003502 IC LINEAR 5V LM78M05 500mA TO 220 1 VR1 N051064004 RES TF 470 5 1 16W 0603 T amp R 4 R1 26 27 39 N051064010 RES TF 1000 5 1 16W 0603 T amp R 1 R38 N05106401 1 RES TF 1102 5 1 16W 0603 T amp R 1 R28 N051064015 RES TF 1 5KQ 5 1
70. EA HT datei ve pes epe ee Tt o reet dua 5 7 PEAR Rack Models cerent 5 7 Front Panel Buttons sostiene re aa E ET 5 7 C CMM LE UM 5 7 Front Panel Knobs n een pete dietum tdem tee tede ree e te v Re 5 7 PC2 Keyboard Models nn sense 5 8 Front Panel B ttOfiS ioter pede eser eid nn aate rer ens 5 8 Alpha VA e ac ete 5 8 Front Panel Sliders 5 ni eire Ne 5 8 Tune Seda el re hal 5 9 Keyboard 2 22 52 Jelena nein RR 5 9 Switch Pedals en LU ee 5 9 Continuous Pedals Land 2 eed Zen 5 9 Power er erp tree 5 10 B PA 5 10 Audio Problems2 22 2 eoa abe e eto tetas 5 10 INO Addio circnm rte ene 5 10 Fr nt Panel Problems i eme tert EE rea Grote ta uon 5 11 EGD MOE Lit 222 EE 5 11 Buttons Sliders or Controllers not working sese nennen 5 11 Keyboard Problems esee e eere 5 12 Dead Keyboard days Given ea Ie in ee o tere eei te etie e ER HERI oie te ua 5 12 tetti 5 12 More 5 12 Mechanical an ee eee 5 12 PEAR InterconnectDiagram zt teet sr
71. Follow the procedure on page 3 8 to install the Front Panel Assembly Removing the LCD Board Remove the Front Panel Assembly as described on page 3 8 It is not necessary to disconnect all the cables that connect the Front Panel Assembly boards to boards located on the bottom enclosure Disconnect the stranded wire cable soldered to the LCD Board from location J405 on the Engine Board Remove the locking cable clip and disconnect the flat ribbon cable soldered to the LCD Board from location J406 on the Engine Board If the unit you are servicing has a PCX 1 Board installed this cable is routed underneath the PCX 1 Board After you disconnect the cable carefully slide it so that it is positioned close to the left edge of the PCX 1 Board left edge as viewed standing at the front panel Gently pull the cable toward the Front Panel Assembly to completely free it from underneath the PCX 1 Board It is not necessary to remove the front panel faceplate to remove the LCD Board One screw that secures the faceplate to the Front Panel Assembly is located above the LCD Board Refer to Figure 3 5 and remove the screw Remove the two screws that secure the LCD Board to the mounting bracket and remove the LCD PC2R Disassembly Assembly Front Panel Assembly Replacing the LCD Board 1 2 4 Place the LCD Board in position over the mounting standoffs the mounting bracket Install the two screws that secure the LCD Board to the
72. Front Panel Assembly are the Right Front Panel LCD Left Front Panel and Headphone Volume Power Switch Removing the Front Panel Assembly Refer to Figure 3 4 The bottom edge of the Front Panel Assembly and front edge of the bottom enclosure connect to form a lip Figure 3 4 Front Panel Assembly and bottom enclosure 1 Tiltup the front edge of the PC2R 2 Using a 1 screwdriver remove the four screws that secure the Front Panel Assembly to the bottom enclosure Note Before continuing be sure that you have a soft surface to rest the Front Panel Assembly on so that the front panel switches jacks and rotary potentiometers are not damaged 3 Slide the Front Panel Assembly forward and away from the bottom enclosure Caution There are four cables connected to the Front Panel Assembly You do not need to disconnect these cables Replacing the Front Panel Assembly 1 Position the Front Panel Assembly so that its bottom edge is under the front edge of the bottom enclosure 2 Tiltup the front edge of the PC2R and install the four black flat head machine screws PC2R Disassembly Assembly Front Panel Assembly Removing the Front Panel Faceplate 2 Note If the service you are performing only requires that you have access to the front panel boards for component testing component replacement or installing a replacement board it is not necessary to remove the front panel faceplate Refer to the procedure for the fr
73. Front Panel Board rack models Controllers FP Buttons and LEDs page 2 of 2 page 7 15 Connector Board rack models Scanner page 1 of 3 page 7 16 Connector Board rack models Digital Interface page 2 of 3 page 7 17 Connector Board rack models Power Supply Audio page 3 of 3 page 7 18 Power Volume Headphone Board rack models page 7 19 MC68331CPV25 DSACKT 2 1 3 1 DSACKO WONT YI YY VV MISO 3 06 MOSI 3 06 SCK 3 C6 SS 3 06 TSC BKP PAI 29 D 1 DACMUTE 5 D1 30 MUTE ROMTPR 4 D5 4 05 OPRSNT 3 07 vec PCLK PCLI CLK25 2 A1 3 D8 5 C1 74VHC14 U1 MUTE 5 C13 2 1 z4 FREEZE TFETCH 7 o TRESET XFC PE2 AVEC_L PE1 DSACK1_L PEO DSACKO L PF7 IRQ7 L PF6 IRQ6_L PF5 IRQ5 L PF4 IRQ4_L PF3 IRQ3_L PF2 IRQ2_L PF1 IRQ1_L PFO MODCLK PQSO MISO PQS1 MOSI PQS2 SCK PQSS PCSO SS L PQS4 PCS1 PQS5 PCS2 PQS6 PCS3 RXD IFETCH L DSI PGP7 IC4 OC5 PGP6 OC4 a PGP5 OCS OC1 PGP4 OC2 OC1 PGP3 OC1 PGP2 IC3 PGP1 IC2 PGPO IC1 VDDSYN EXTAL PE7 SIZ1 SIZ1 4 C6 6 5120 9120 4 C6 PE4 DS_L DS PES AS_L 1 U1 R W WE 1 3 1 4 6 2 A 74VHC14 A23 CS10_L E 4 C6 A22 CS9 L TAK7 A21 CS8 L ASICS 2 B4 A20 CS7 1 A19 CS6 L A18 A17 A16 A15 A14 A13
74. GHT PC2 RACK FRONT PANEL FP Buttons and LEDs Filename 021251C1 Date 12 20 2000 Eng DAON By DO Mfg Sht 1 of 2 Doc 021251 000 Kurzweil PC2 Series Service Manual ROWDRIVERPOWER A Q9 0 1uF 50V 20 MMBT2222A C E S e e v Lin Y Y 2 2 J603 Front Panel Bridge RDRPWR Q10 DGND MBT2222A ZONE 4 ZONE 1 ZONE 2 E B 015 x A 017 x X DUAL DUAL COLOR DUAL SROWO SROW1 DROWO DROW1 4 A CTRL4 QA 3 CTRL3 UL D12 UL D14 CTRL2 ZONE 4 IN LL4148 IN 4148 CTRL1 e 2 COL9 COL7 COL6 COL3 COL2 COL1 C Front Panel Bridge 2 5vref AVSS J604 cw cw cw CW 10K LIN 10K LIN 2 10K LIN 10K LIN R19 R20 gt R21 R22 em ae POLG iie YOUNG CHANG CO LTD Reproduction without the express written consent D of Young Chang Co Ltd is prohibited LEFT PC2 RACK FRONT PANEL Controllers FP Buttons and LEDs Filename 021251C1 Date 12 20 2000 By DAON Sht2 of 2 Rev C v1 7 15 Kurzweil PC2 Series Service Manual VBAT
75. IC 74HC373 DIP20 1 U3 N252003102 CAP ELECT ECE BOJU471 470UF 6 3V VERT AX 2 C1 6 Connector Board N012300061 Part No Description Qty Reference Designation RES TF 7 5KQ 5 1 8W 1206 1 R19 N025224508 TAPPING SCREW 2 BH 3 5X8 WHITE W WASHER 3 N025323308 MACHINE SCREW BH M3X8 BLK 1 N03203881 1 BRACKET SUPPORT I O PCB PC2 X 1 N032038816 BRACKET SUPPORT POWER JACK PC2 X 1 N032064801 EXTRUSION HEAT TRANSFER 1 N041006503 CONN PWR JACK 4P W SHIELD UNITOP 1 J321 041021903 JACK PHONE TYPE 1 4300 041025308 HEADER 156 SP 8P 09 65 2088 1 J301 N041030033 MODULAR JACK 6P R A AMP 555163 1 1 4316 041030310 CONN MIDI JACK 3 GANG 51 5041 JALCO 1 J320 N041031220 HEADER 1 SP DUAL ROW 20P 057 020 153 3 4304 306 307 N041032305 CONN WIRE TRAP 2 00mmSP 5P 52147 0510 1 J302 N041032306 CONN WIRE TRAP 2 00mmSP 6P 52147 0610 1 J308 N041032307 CONN WIRE TRAP 2 00mmSP 7P 52147 0710 1 J305 N041032310 CONN WIRE TRAP 2 00mmSP 10P 52147 1010 1 4303 041034401 PHONE JACK MONO 1 4 RA49C 12A MONO 3 J317 319 N041034411 CONN STEREO 1 8 W SWITCH UNITOP 1 J315 N041034501 PHONE JACK STEREO 1 4 RA49C 14B 5 J310 314 N043003702 SWITCH POWER DPDT NKK M2022TXW30 DA 1 S2 N043010510 SWITCH SLIDER R A 2 5mmSP SPDT 1 S1 N051064005 RES TF 569 596 1 16W 0603 4 R98 96 99 102 N05106401 1 RES TF 1109 5 1 16W 0603 12 R17 20 65 68 69 73 75 94 95 97 98 N051064015 RES TF 1 5KQ 5 1 16W 0603 1 R22 N051064022 RES TF 220
76. J306 RP1 3 J307 RP4 5 YOUNG CHANG LTD J308 RP11 C1 3 Reproduction without the express written consent of Young Chang Co Ltd is prohibited PC88 II CONNECTOR PCB Scanner Filename 021221C4 Date 9 29 00 Sht 1 of 3 FATAR_88_TREBLE Kurzweil PC2 Series Service Manual L5 Use either U6 or U7 AES XFRMR 5Vref 1 1 Q1 MMBT2907 EXPRESSION PEDAL 1 D3 a A EXPDL1 1 B1 EXPRESSION PEDAL 2 114148 0 1uF D4 E A EXPDL2 1 1 U7 PC410 1 c17 14148 A 1000pF D13 R102 56 a vec N 2 3 1 C18 1000pF PC910 U6 U5 U5 74HCU04 74HCU04 1 THRU 3 OUT 12 18 24 1 05 05 74HCU04 74HCU04 eee Oe 1 6 PI ei 4 DIGITAL OUT SPDIF OUT MIDI RxD 1 OUT THRU SELECT 10 11 lt 3 INT RxD INT TxD DIG OUT GND VBAT Ojo Oo o015 o0 m
77. MCS CWE 2 A1 3 A1 4 C6 BERR 7 IROS 4 7 TROS RO4 4 C8 2 CA 19 CA 18 CA 17 CA 16 CA 15 CA 14 CA 13 CA 12 CA 11 CA 10 CA 09 08 CA 07 06 05 CA 04 031 CA 02 CA 01 Kurzweil PC2 Series Service Manual D 15 00 2 C1 3 A1 4 C6 20 00 2 A1 3 A1 4 B5 E CWE 2 3 4 DSACKO 50 5 DACMUTE 5 D1 MUTE CA 01 2 3 4 CWE 02 03 04 L2 SMT2 5T VANVASVASPASPASPASPASPASPASPASPASPASPASPASPAS J405 GND BACKLIGHT J406 Vss Vdd 1 VEE PCLK BUVdd MUTE 12 AGND 12V 5V DIG DGND MUTE 5 C1 Co 1 00 PC2 POWER U1 74VHC14 12 74VHC14 D6 R69 DNS DNS 2 gt 1 R6 1 2 2K 2 RESET 4 C6 U1 74VHC14 10 RESET 2 A1 3 D1 4 D6 5 C1 FE BEAD L4 A U8 74HC245 A 1 RS R W E 000
78. Note If possible all user programs and setups should be saved prior to opening the unit entering the Boot Block to run diagnostics or to perform a hard reset For instructions to save all user programs and setups see Saving User Data in Chapter 5 page 5 1 Models There are three models in the PC2 series The available models are listed below e PC2 76 note keyboard e 2 88 note keyboard e PC2R rack mount Notes Cautions Warnings Please pay special attention to all Notes Cautions and Warnings used throughout this manual as they not only point out specific instructions but also alert you to differences between the PC2R rack units the 76 note PC2 keyboard and the 88 note PC2X keyboard Certain chapters and sections are solely for the rack or keyboard units Other chapters combine both the rack and keyboard units A brief description of these symbols follows Note Provides additional information indicates differences between models and emphasizes specific instructions Caution Instructs you to proceed cautiously so that damage does not occur to the unit or individual components Warning Alerts you so that damage does not occur to yourself others or external devices Introduction PC2 PC2X PC2 PC2X PC2 PC2X Rear Panel Power Digital Breath ____ Ribbon Connector Out Input Input i i i i od i i Power Pedals Inputs Audio Outs
79. OLOR DUAL COLOR ZONE 1 ZONE 2 ZONE 3 ZONE 4 J101 SLIDER 5VREF C CTRL1 CTRL2 a 2 R 2 gt 82 2 2 lt R4 R5 VSLDR 10K LIN 10K LIN N 10K LIN N 10K LIN 10K LIN AGND UP c UP UP UP SLIDER D SLIDER C SLIDER B SLIDER A VOLUME YOUNG CHANG CO LTD Reproduction without the express written consent of Young Chang Co Ltd is prohibited PC88 II SLIDER PCB Sliders See Table Buttons D Filename 121198B1 Date 10 26 99 Eng By Mfg Sht 1 of 1 Doc Kurzweil PC2 Series Service Manual 7 14 U1 74HC145 SW ROTARY voc A B D _ 1 470uF 6V 0 1uF 50V 20 C9 0 1uF 50V 20 FRONT C10 0 1uF 50V 20 J601 CONTHI WPR CONTLO CTRL1 CTRL2 CTRL3 CTRL4 5V OONA UOUN O ROWDRVPWR 2907 2907 2907 2907 2907 2907 ROWDRVPWR J602 1 C2 470uF 6V U2 74HC373 PHASEB PHASEA SENSE DRIVE COLA COLD COLC COLB ROW7 ROW6 ROWS5 ROW2 ROW1 ROWO DGND4 DGND3 DGND2 DGND1 G 0 1 50V 20 Front Panel Bridge RDRPWR DGND SROWO SROW1 DROWO DRO
80. PC2 Series Service Manual KURZWEIL Viaggi Seta 2004 All rights reserved Kurzweil is a product line of Young Chang Co Kurzweil is a trademark of Young Chang Co All other products and brand names are trademarks or registered trademarks of their respective companies Product features and specifications are subject to change without notice Part Number 910395 Rev A CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the product IMPORTANT SAFETY amp INSTALLATION INSTRUCTIONS INSTRUCTIONS PERTAINING TO THE RISK OF FIRE ELECTRIC SHOCK OR INJURY TO PERSONS WARNING When using electric products basic precautions should always be followed including the following 1 Read all of the Safety and Installation Instructions and Explanation of Graphic Symbols before using the product 2 Do not use
81. PC2R 9 53 8 10 11 12 N035033600 KEYCAP NO LED PC2R 5 Q 81 2 9 13 14 N035034000 KNOB ENCODER PC2R 1 SP1 N051101702 RES CF 159 5 1 8W 1206 2 R9 10 N051101703 RES CF 19 5 1 8W 1206 1 R2 N051101757 RES CF 10KQ 5 1 8W 1206 12 R3 8 11 16 N052007503 CAP CER X7R 0 1UF 50V 10 1206 7 C3 6 8 10 N054000802 TRANSISTOR MMBT2222L SOT 23 2 01 2 054002906 TRANSISTOR MMBT2907L SOT 23 6 03 8 N061000302 IC LOGIC 74LS145 SOP16 1 U1 N061014003 IC LOGIC MC74HC541DW SOP 20 1 U3 N061020502 IC 74HC373A OCTAL LATCH SOIC20 1 U2 Headphone Volume Power Switch Board N012700019 Part No Description Gty Reference Designation N041021007 HEADPHONE JACK HTJ 064 05 MARK XXX 1 J1 N041034110 HEADER 10P 1 ROW 098 SP R A 1 J2 N251102305 POT 10K LIN PUSH SW PC2R 1 R1 LCD Board N012103802 Part No Description Gty Reference Designation N013042502 CABLE ENG TO LCD 14P PC2R 330mm 1 N013042603 CABLE ENG TO LCD BACKLIGHT 2P PC2R 1 N245010320 LCD DISPLAY 20X2 Tinama TM202JFF6 1 6 15 Parts Lists PC2R Final Assembly N012000153 Part No Description Qty Reference Designation N013041802 CABLE ENG TO CONN BD 10P PC2R 160mm 1 N013042202 CABLE ENG TO CONN BD POWER PC2R 200mm 1 N032062700 FRONT PANEL 1 N039040001 BUMPON BLACK 5508 4 N052001021 ADAPTER YCA PC2 1 N013042801 CABLE CONN TO HEADPHONE PC2R 270mm 1 N01304290
82. Press the Cancel button twice to return to the main menu Scroll to Hard Reset and select Yes Troubleshooting Software Updates Installing a New Boot Block N Warning This procedure performs a hard reset All user programs and setups will be erased Before continuing be sure to save all user programs and setups 1 Connect a MIDI cable from the MIDI Out port of the computer interface or sequencer to the MIDI In port on the PC2 Using the sequencer program open the first MID file Turn on the PC2 and follow the procedure to enter the Boot Block Press the Enter button to select UPdate boot block Press the Enter button to select via MIDI aA ON The LCD shows Maitins for MIDI Start playing the MIDI file from the sequencer While a file is loading the bottom line of the display shows the progress If the display continues to show 1 1 9 for MIDI after starting the sequencer stop and restart the sequence 7 After the file is loaded the unit will reset Installing Sound ROM Options After installing a Sound ROM option the presets need to be transferred into Flash ROM A N Warning This procedure requires performing a hard reset All user programs and setups will be 4 erased Before continuing be sure to save all user programs and setups 1 Turn on the PC2 and follow the procedure to enter the Boot Block 2 Use the Left or Right cursor button to scroll to Install ROM oftion and press the En
83. R PC2 X 1 N035026151 BUTTON LG W LED SOLO PC2 X 1 N035026152 BUTTON LG W LED EQ PC2 X 1 N035026153 BUTTON LG W LED SW1 PC2 X 1 N035026154 BUTTON LG W LED SW2 PC2 X 1 N035026155 BUTTON LG W LED SW3 PC2 X 1 N035026156 BUTTON LG W LED SW4 PC2 X 1 N035026157 BUTTON LG W LED SW5 PC2 X 1 N035026217 BUTTON LG NO LED 6 N035026611 LCD SUPPORT BEZEL 1 N035026711 SPIN KNOB BEZEL 1 N041031220 HEADER 1 SP DUAL ROW 20 1 J604 N041032205 CONN WIRE TRAP 2 00mmSP 5P R A 1 3701 N041032305 CONN WIRE TRAP 2 00mmSP 5P R A 1 J601 N041032308 CONN WIRE TRAP 2 00mmSP 8P 1 J602 N043003708 SWITCH TACT SPST 6mmX6mm 160GF 72 81 72 No44010501 ENCODER 36 STEP 2BIT 1 5 1 N045010111 LED T1 RED EFF DIFFUSED LTL 422 49 145107 20 2426729 TB Oc oes 55 60 N045010612 LED MINI GREEN DIFUSSED T1 3 D33 41 49 N051005010 RES 125 1 8W 1 R8 N051100102 RES CF 159 5 1 8W R17 Parts Lists PC2 PC2X Part No Description Qty Reference Designation N051100157 RES CF 10KQ 5 1 8W 18 R9 26 N052001204 CAP CER MONO Z5U 1UF 50V 20 3AX 3 2 4 054000801 TRANSISTOR PN2222 TO 92 7 01 7 N054001201 TRANSISTOR PNP KTA1271 KSA643CY TO 9 10 Q8 17 N061000301 IC LOGIC 74LS145 DIP16 300 1 U2 N061014001 IC LOGIC 74HC541 DIP20 1 U1 N061020501 IC LOG
84. STALL bo NOT INSTALL Eng By T THOMPSON Mfg Sht2 of 5 Doc 021197 Kurzweil PC2 Series Service Manual
85. STIC 14 FOR ENDCAPS N215040311 KEYBOARD TP 8R AFT STRIP 76 NOTE 1 Part No Description PCB KEY CONTACT LOW Qty Reference Designation PCB KEY CONTACT HIGH KEY CONTACT STRIP 12 NOTE BRACKET ROD KEY WEIGHT SUPPORT 12 PO KEY PIVOT BRACKET ROD KEY WEIGHT SUPPORT 4 POS KEY NATURAL A KEY NATURAL B KEY NATURAL C KEY NATURAL D KEY NATURAL E KEY NATURAL F KEY NATURAL G KEY NATURAL LOW A KEY NATURAL HIGH C KEY SHARP KEY WEIGHT NATURAL KEY WEIGHT SHARP FELT RED AFTER TOUCH STRIP 6 10 PC2X Final Assembly N012000151 Parts Lists PC2X Part No Description Qty Reference Designation E207407181 DOUBLE SIDE TAPE 3M 5MMX50M 4670 01 N013030951 CABLE TIE 13 N013041601 CABLE SLIDER TO FRONT PANEL 8P PC2 X 1 N013041701 CABLE SLIDER TO CONNECTOR BD 7P PC2 X 1 N013041801 CABLE ENGINE TO CONNECTOR BD 10P PC2 X 1 N013041901 CABLE ENGINE TO CONNECTOR BD 5P PC2 X 1 N013042001 CABLE WHEEL TO CONNECTOR BD 6P PC2 X 1 N013042101 CABLE BUTTON BD TO FRONT PANEL 5P PC2 X 1 N013042201 CABLE ENGINE TO CONN BD POWER PC2 X 1 N013042301 CABLE KEYBOARD BASS amp TREBLE PC2 X 1 013042303 CABLE KEYBOARD BASS PC2X 1 N013042401 CABLE FRONT PANEL TO CONNECTOR B D PC2 X 1 N015047014 FELT W ONE SIDE ADHESIVE
86. Service Manual 7 12 014 S1A 17V Switch is in ON Position C30 1000uF 25V gt a PC8sil PWR vbi J321 C31 470uF 25V _ vw V 78T05 IN OUT N V VR3 79L12ACM C28X GND C34X 100UF 16 100uF 16V C27 C26 1000PF _T 1000 FB2 STSMT GJ1 1 2 JUMPER V R8 5 6K E ise GJ1 connects directly to C28 2 in a star ground pattern MMBT2907 Q4 R117 470 12 C36X 100uF 16V 4 13 OUT 14 100uF 16V C374 E Ll4 N N RESET 1 A1 Q7 MMBT2222 U5 74HCU04 s VCC PWRUPRST 1 A8 J301 IPWRUPRST IBUVdd IMUTE 12 AGND 12V oo N DIG DGND PC88 II POWER R133 15 0K 1 R132 15 0K 1 1 2 Q9 MMBT2222 NE5532 09 C40X 1000uF 16V lt 148 N 2 1 1 ONE EACH AT GROUND PINS OF U1 U2 05 U7 011 LM339 U4 a J302 LOUT
87. UT Us s J303 MIDI amp CPU 1 qaod RxD 3 THRU 7 MIDI OUT OUT THRU SELECT NI On Go 1 L C21 1000pF NTMIDITxD 1 A8 NTMIDIRxD 1 A8 L PORTA 1 06 CONTRAST 1 C8 1 A8 YOUNG CHANG CO LTD Reproduction without the express written consent of Young Chang Co Ltd is prohibited PC2 Rack Connector PCB Digital Interfaces Filename 021250B3 Date 9 29 2000 E By D O Neill Sht2 of3 Rev 7 17 Kurzweil PC2 Series Service Manual 51 17V 2 pH 74HCUO4 PWRUPRST 1 8 VCC J301 1000 25V caet 100uF 16V 7 PWRUPRST BUVdd IMUTE H12V AGND 12V DIG 1 2 4322 51 17V D15 K VR3 c3 L 79L12ACM 470uF 25V Z a 14VACSW 2 ovoc V OUT L PCB8IIPOWER 9VDCSW 4 100uF 16 5Vref 1 5 H 5V ref C37 VOLUME 1 87 WPR DGND LEFT RIGHT WV AGND Q9 MMBT2222 m co evo 1109 o HPLEFT HPRIGHT ololoo PC88ll PWR
88. V LM79L12 SOP8 1 VR3 N064010805 IC LINEAR 5V KA78T05 5V 220 1 VR1 N064010806 IC LINEAR 12 LM78M12 TO 220 1 VR2 N215000105 SCHOTT TRANSFORMER 67129600 1 L5 N262100608 IC MICROCONTROLLER M37451M8 731FP 1 U1 Parts Lists PC2 PC2X LCD Board N012103800 Part No Description Qty Reference Designation N013040112 CABLE ENGINE TO LCD 14P RIBBON 1 N013042601 CABLE ENGINE TO LCD BACKLIGHT 2P PC2 X 1 N045010302 LCD UC 20212BLANO SAMSUNG PC 88 MX 1 Pitch amp Mod Wheel Assembly N012300053 Part No Description Qty Reference Designation N013040122 CABLE POT TO WHEEL BD 3P 26 AWG 4 2 041030007 HEADER 0 1 SP 22 03 2041 2 J202 203 N041032306 CONN WIRE TRAP 2 00mmSP 6P 52147 0610 1 J201 N051100118 RES CF 2200 5 1 8W 2 R18 19 N051100132 RES CF 1 5 1 8W 1 R17 N051100310 RES MF 1KQ 1 1 8W 1 R12 N051100316 RES MF 1 5KQ 1 1 8W 1 R13 N051100336 RES MF 4 99KQ 196 1 8W 2 R16 20 N051100354 RES MF 10KQ 1 1 8W 2 R9 10 N051100379 RES 110K 1 8W 196 2 R6 7 N051100439 RES MF 30 1KQ 1 1 8W 3 R4 5 8 N051100850 RES MF 2 49KQ 196 1 8W 1 R11 N051101401 RES POT 100K 3 4 TURN 2 R14 15 N051101410 RES TRIMPOT 50K 3 4 TURN 1 R3 N051102301 POT ROTARY 10K K2000 2 R1 2 N052001204 CAP CER MONO Z5U 1UF 50V 20 3AX 6 C1 6 N064001903 IC LINEAR OPAMP TLC2272CP DIP8 3 U1 3 N025223410 TAPPING SCREW 2 BH 3X10 BLK 1 N0252
89. W1 Qi MMBT2222A E CNTRLR4 11 CNTRLR3 CNTRLR2 CNTRLR1 _ CTRL4 CTRL3 CTRL2 CTRL1 COL9 COL7 COL6 COL3 COL2 COL1 MIDI SETUPS X RED p 05 GLOBAL x RED D7 Ks V Q2 MMBT2222A E COMPARE RED D2 INT VOX TE RED A e 2 MIDI RCV 3 a D9 DUAL COLOR A D 1 Q 1 D 2 Q 2 D 3 Q 3 D 4 Q 4 D 5 Q 5 D 6 Q 6 D 8 8 D 7 Q 7 U3 74HC541 FRONT PANEL RIGHT B 1 A 1 2 2 A 3 B 4 4 5 A 5 B 6 A 6 lt 00 B 7 A 7 B 8 8 G2 GT C4 O 1uF 50V 20 C5 0 1uF 50V 20 C6 0 1uF 50V 20 COMPARE 337 1 INT VOX 33 1 4 2 54 337 S5 CANCEL 1 4 2 13 FRONT PANEL RIGHT Note From RevB to RevC no schematic changes nade YOUNG CHANG CO LTD D Reproduction without the express written consent of Young Chang Co Ltd is prohibited RI
90. X Removing the Top Enclosure 1 Depending on the unit you are servicing follow the procedures described on page 4 2 for the PC2 bottom or page 4 3 for the PC2X bottom 2 Refer to Figure 4 3 2 Note Figure 4 3 is an illustration of the PC2 rear panel An illustration of the PC2X has LYS not been included because the difference between the two is minimal The quantity and position of the endcap screws is identical 3 Remove the four screws that secure the endcaps to the rear panel Endcap screws Lo KURZWEIL PC e A A Endcap screws Figure 4 3 PC2 rear panel N Caution The following steps describe removing the left and right endcaps To avoid PN damage to the endcaps be sure to hold onto each endcap when removing the screws When the endcap screws are removed the endcap is free of the unit 4 Refer to Figure 4 1 for the PC2 or Figure 4 2 for the PC2X Move the unit so that one end hangs over the edge of your work surface Remove the four endcap screws from the bottom enclosure One of these screws secures the endcap locking bracket When you remove the endcap locking bracket screw the bracket remains loosely in the endcap assembly Set the endcap safely aside Repeat for the other endcap 5 Refer to Figure 4 4 The bottom edge of the rear panel and back edge of the bottom enclosure connect to form a lip The rear panel screws secure the lip 22 Note Figure 4 4 is an illustration
91. a Oi AUC e 4 10 Removing the Front Panel ib ico RAS 4 10 Replacing the Front Panel Board 4 12 Removing the LCD Boards ee ee ee ee 4 13 Replaone die Le 4 13 Removing the Polyphony Expansion Board PCX 1 ai aee ee 4 13 Replacing the Polyphony Expansion Board I 4 14 Kurzweil PC2 Series Service Manual Contents Removing the SHIGE Board tee ioter p 4 14 Replacing die elder Board en 4 15 Ketnovinedhe Engine 4 15 Replacing cM d etu ud 4 17 Removing the Mod Wheel anne En 4 17 Replacing dhe Mod Wheel ee er her 4 18 PEZ Keyboard Assembly ce leiten lehnen bh 4 19 Removing the 2 Keyboard Assembly on ee a 4 19 Replacing the PC2 Keyboard Assembly una nee 4 20 Diseonnectua the Poo Rev board once ee 4 21 Connecting ihe Den odo tu 4 21 Removins Keys oic RR e eee eet 4 22 Natural Witte Key t 4 22 Natural White Keys nase ae ee 4 23 Sharp o 4 23 Replacing ia Key cce Se reete eee ee eode tee estet dt eii ene eis 4 24 Servicing the Keyboard Contact Boards socer td nn ei 4 24 Remove te Treple ORAL Board a een ee 4 24 Replacne the Trebl Con
92. aceplate Turn the rotary potentiometers to be sure that they move freely and push the switch button caps to be sure that their corresponding switches click Install the screw that secures the front panel faceplate Connect the flat ribbon cable from the Right Front Panel Board to the Left Front Panel Board location J603 Caution The side walls of the picoflex header are different The Pin 1 side is slightly wider than the other side and the corresponding sides of the connector incorporate the differences When you connect the cable be sure to orient the marking red or black on the cable that indicates the connection to Pin 1 on the board to prevent damage to the header connector or a failure caused by an improper connection Refer to Figure 3 6 Solder the wire connection from the Headphone Volume Power Switch Board to the location indicated on the Left Front Panel Board Follow the procedure on page 3 8 to install the Front Panel Assembly 3 13 PC2R Disassembly Assembly Front Panel Assembly Removing the Headphone Volume Power Switch Board 1 Remove the Front Panel Assembly as described on page 3 8 It is not necessary to disconnect all the cables that connect the Front Panel Assembly boards to boards located on the bottom enclosure Follow the procedure on page 3 9 to remove the front panel faceplate Disconnect the stranded wire cable that connects the Headphone Volume Power Switch Board to the Conn
93. ard front screws e SSS SSS eee ae ea nn ee 1 e e oy iens i N t 1 e 9 e i Keyboard rear screws pote mom nonc ie seme m HOS Hem mem om e Oy e e Lg e e e e Access panel oo e o e Eg e Rear panel __ Mod Wheel screws Figure 4 16 PC2X 88 note keyboard bottom 5 Slide the PC2X back onto your work surface 6 Lift the Mod Wheel Assembly and disconnect the Aftertouch flex cables These cables have nylon reinforced tape securing them to the bottom enclosure Peel back the tape from one side to free the cables 7 Place the Mod Wheel Assembly in its position on the bottom enclosure 8 Remove the cable locking clips and disconnect the flat ribbon cables from locations 306 and J307 on the Connector Board These cables are also secured to the bottom enclosure with nylon reinforced tape Peel back the tape from one side to free the cables 2 Note If you are merely replacing or more keys it is not necessary to entirely remove the Keyboard Assembly from the PC2X Follow the procedure page 4 27 9 Remove the Keyboard Assembly 4 26 PC2 PC2X Disassembly Assembly PC2X Keyboard Assembly Replacing the PC2X Keyboard Assembly e Re gv 20 Place the keyboard on the bottom enclosure Be sure that the
94. arder the display will change and show the pressure value PRESSURE 255 Switch Pedals 1 2 and 3 To test a switch pedal press the pedal An example of the expected test result for the switch pedal 1 follows Full depression PEDAL 1 Continuous Pedals 1 and 2 To test the continuous control pedal press the pedal An example of the expected test result for the continuous control pedal follows No depression CTRL PEDAL 255 Full depression CTRL FEDAL Troubleshooting Power Problems Power Problems Dead Before opening the unit verify the following e AC outlet is supplying power AC adapter is properly connected to the unit Check the power switch power jack and AC adapter Refer to the Interconnect Diagram See page 5 13 for rack models or page 5 14 for keyboard models Check all related connections Refer to the Connector Board schematics and check all supply voltages Audio Problems No Audio 26 Qv wm 59 Note If you are diagnosing a PC2R rack unit you can check for audio without having a controller connected Connect a pair of headphones turn the power on When the unit is on and ready to play simultaneously press the MIDI Receive and Global buttons to play one of the stored demos Flashing LEDs in the Performance section indicate the locations of the stored demos Select one to play to check the audio Press the Cancel button to exit Run the Scanner Diagnostics to che
95. boot block and returns the unit to normal operation Hard RESET Clears the memory to factory default settings Resets Hard Reset There are two ways to perform a Hard Reset to the PC2 1 Press the Global button and press the Right cursor button to step through the Global parameters to Reset 2 and press the Enter Yes button The LCD displays an Are You sure message Press the Enter Yes button to continue or the Cancel No 2 Enter the Boot Loader and press either the Left or Right cursor button to scroll through the menu Press Enter to select Hard Reset The LCD displays an Erase RAM objects message Press the Right button to execute the hard reset Press the Left button to cancel Soft Reset The Soft Reset does not erase user programs and setups and is equivalent to turning the power off and on To Soft Reset a PC2R simultaneously press the FX MIDI Receive and Global buttons To Soft Reset a PC2 simultaneously press the 0 and Clear buttons Troubleshooting Software Updates Software Updates A computer with a MIDI interface and sequencer is necessary to transfer software to your PC2 units MIDI Sysex File Formats Software upgrades are stored as standard MIDI files Filenames are in the format PC2XV V MID where X is the software block and is the version number V VV The following lists the possible values for X Never install files with names that don t conform to this format it won t work bk
96. buttons in the third group labelled 1 16 to select a category of Internal Voice programs or MIDI setups In KB3 Mode use these buttons to select one of the 16 KB3 programs Effects and Reverb Use the buttons in this section to select from two blocks of effects to apply effects and reverb to programs and setups Data Entry 7 8 9 STU VWX 2 0 Clear UPPER lower 0 9 Space Cancel Enter No Yes Figure 1 6 Data Entry section Data Entry This section contains the Alpha Wheel Minus and Plus buttons and the Alphanumeric keypad Use the Alpha Wheel or the Minus and Plus buttons to increase or decrease a value Use the buttons in the Alphanumeric keypad to enter text numbers spaces etc This section also includes the Cancel No and Enter Yes buttons Mod Pitch Wheel Assembly not shown Use the two wheels to vary modulation and pitch Also included on the assembly is the SW4 and SW5 switches for use in the Internal Voices and MIDI Setups modes 1 5 Introduction PC2R PC2R PC2R Rear Panel KURZWEIL PC2R FR Digital Out Outs MIDI MIDI Audio Digital Select Switch Outs MIDI Power Ports In Figure 1 7 PC2R rear panel Rear Panel Features Audio Outs Balanced 1 4 left and right audio output jacks to connect to an amplifier mixer or sound system Digital Out RCA jack to connect to digital recorders and mixers
97. cement of the front panel faceplate screws located above the boards Refer to the procedure for the front panel board you need to remove and follow the steps described PC2R Disassembly Assembly Front Panel Assembly 8 0 i Headphone Volume Power Switch Board Left Front Panel Board Right Front Panel Board Figure 3 5 Front panel faceplate screw locations Removing the Right Front Panel Board 1 Remove the Front Panel Assembly as described on page 3 8 It is not necessary to disconnect all the cables that connect the Front Panel Assembly boards to boards located on the bottom enclosure 2 Remove the cable locking clip and disconnect the flat ribbon cable from J601 on the Right Front Panel Board 3 Disconnect the flat ribbon cable from J602 This cable uses a picoflex molex connector To disconnect it grip the connector and pull it out straight N Caution Do not wiggle the connector back and forth Doing so could cause damage to N the header 2 Note aware of the marking red or black the cable that indicates the connection to LA Pin 1 you ll need to reconnect the marked edge of the cable to Pin 1 when you replace the board 4 tis not necessary to remove the front panel faceplate to remove the Right Front Panel Board Two of the screws that secure the front panel faceplate to the Front Panel Assembly are located above the Right Front Panel Board Refer to Fi
98. ck models or page 5 14 for keyboard models Check all related cables Disconnect and reseat the cables Check the solder connections at the connectors Check front panel ribbon cable s Refer to the Connector Board schematics and check U1 IC Scanner 37451 for signal activity Troubleshooting Keyboard Problems Keyboard Problems Dead Key 1 Qv GOLD iiec EJ board Check the flat ribbon cables connecting the keyboard Bass and Treble Contact Boards to the Connector Board locations J306 and J307 Be certain that the cables are not loose or damaged Disconnect and reseat the cables Refer to the Connector Board schematics Check U1 IC Scanner 37451 on the Connector Board for keyboard signals Trace signal path Find and replace bad component s or order a board replacement Dead Note s One or More in a Section 1 2 Remove related contact board Check contact strip for dirt damage or wearing Clean dirty contacts with denatured alcohol Replace damaged or worn contact strip Install contact strip If section is still dead remove strip and check contact board for shorts cold solder joints etc Find and replace bad component s or order replacement board Mechanical Noise 1 9 12 Check keyboard for broken key weights support brackets or ripped contacts 2 Interconnect Diagram Troubleshooting PC2R Interconnect Diagram
99. ck the volume slider operation Refer to the Interconnect Diagram See page 5 13 for rack models or page 5 14 for keyboard models Check the flat ribbon cable from J412 on the Engine Board to J302 on the Connector Board Check the solder connections at the connectors Refer to the Engine Board schematics and check the signal activity on the DAC U23 Trace the signal path Troubleshooting Front Panel Problems Front Panel Problems LCD not 1 it Check the LCD contrast potentiometer Turn the pot to see if there is any change Note If you are servicing a PC2R rack unit the LCD Contrast is located on the front panel If you are servicing a PC2 keyboard it is located on the rear panel Check the stranded wire cable from the LCD Board to J405 on the Engine Board Disconnect and reseat the cable Check the flat ribbon cable from the LCD Board to J406 on the Engine Board Disconnect and reseat the cable Check the solder connections on the LCD and Engine Boards Refer to the Engine Board schematics and check the signal path Buttons Sliders or Controllers not working 1 n NG uu Oh Be ces Run the Scanner Tests Note If you are servicing a PC2R rack unit simultaneously press the Internal Voices KB3 and MIDI Setups buttons located in the top row of the Modes section If you are servicing a PC2 keyboard simultaneously press the 4 5 and 6 buttons Refer to the Interconnect Diagram See page 5 13 for ra
100. closure 4 6 Connector Board 4 10 Enclosure Support Walls 4 8 Engine Board 4 17 Front Panel Board 4 12 LCD Board 4 13 Mod Wheel Assembly 4 18 Polyphony Expansion Board PCX 1 4 14 Slider Board 4 15 top enclosure 4 6 Assembly instructions rack models Connector Board 3 4 Engine Board 3 6 Headphone Volume Power Switch Board 3 14 LCD Board 3 12 Left Front Panel Board 3 13 Polyphony Expansion Board PCX 1 3 5 removing the front panel faceplate 3 9 replacing the front panel faceplate 3 8 Right Front Panel Board 3 11 Top Cover 3 2 Battery removing PC2 5 5 removing PC2R 5 6 replacing PC2 5 5 replacing PC2R 5 6 Boot Block entering 5 2 installing 5 4 Boot block installing the Sound ROM Option 5 4 Bottom Enclosure closing keyboard models 4 6 diagram 76 note keyboard 4 2 4 19 diagram 88 note keyboard 4 3 4 26 opening 76 note keyboard 4 2 opening 88 note keyboard 4 3 Burn in Tests diagnostics 2 3 Button Test scanner tests PC2 5 8 scanner tests PC2R 5 7 Kurzweil PC2 Series Service Manual Cables keyboard models Connector Board 4 8 Engine Board 4 16 Front Panel Board 4 11 Cables rack models Connector Board 3 3 Engine Board 3 6 Connector Board cables keyboard models 4 8 cables rack models 3 3 diagram hardware 4 9 parts list Keyboard models 6 6 parts list rack models 6 13 removing keyboard models 4 8 removing rack models 3 3 replacing keyboard models 4 10 replacing rack models 3 4 Contact Boards re
101. connects to J601 on the Front Panel Board Lift up the sides of each connector This unlocks the trap to free the cable wires Gently pull each cable up out of the connector Note the marking red or black on each cable that indicates the connection to Pin 1 you ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Mod Wheel Assembly 5 Remove the Mod Wheel Assembly Replacing the Mod Wheel Assembly Hold the Mod Wheel Assembly in position over the bottom enclosure 2 Connect the wire trap flat ribbon cables in the following order Caution Be sure to look for the marking on the edge of the cable denoting Pin 1 and that you match it correctly with Pin 1 on the board Make certain that the wires are straight prior to inserting them into the connector and that each wire is correctly inserted into its respective position Note Be sure the sides of the connector are lifted Insert the flat ribbon cables into the wire trap connectors and push down the sides of each connector to lock the cable into the connector Gently pull each cable to verify that it is locked into its connector Insert the six wire flat ribbon cable from the Connector Board into the wire trap connector at J201 on the Wheels Board Insert the five wire flat ribbon cable from the Front Panel Board into the wire trap connector at J701 on the IBBB Board Connect the flat flex cable s Note If you are servicing a PC2 connect the flat flex cabl
102. ction 7 Hook Figure 4 19 Key spring Unlock the key from the pivot anchoring the key to the keyboard chassis To do this insert a small flat screwdriver at the back end of the pivot and press toward the front edge of the keyboard While doing so lift the back end of the key where the spring was positioned The key should now be free of the pivot Remove the screwdriver Lift the key up slightly then forward You should be able to feel when the key is free of the pivot The front edge of each key hooks under the keyboard chassis Be sure the key is not hooked under the keyboard chassis prior to lifting the key off Sharp Black Keys 1 To remove a sharp key first remove the adjacent natural keys as described in the previous procedure Remove the gold key spring located at the rear of the sharp key You will notice that the bottom of the spring is secured to the keyboard chassis by a hook Refer to Figure 4 19 You can remove the spring by inserting a dowel 3mm diameter into the spring and pushing down on it slightly Then pull the top of the dowel toward the front of the keyboard This will unhook the spring from the keyboard chassis Unlock the key from the pivot anchoring the key to the keyboard chassis To do this insert a small flat screwdriver at the bottom of the pivot and press toward the front edge of the keyboard While doing so lift the back end of the key where the spring was positioned The
103. e Remove the Slider Board The slider knobs slider bezels and switch button caps should remain in place PC2 PC2X Disassembly Assembly Top Enclosure Caution Each switch button cap uses a set of small pegs to mount the cap to the Slider Board The button caps are mounted individually or in clusters If a cap becomes separated from the board be careful that a peg is not inadvertently broken the Slider Board 2 3 4 N 20 5 6 Position the Slider Board onto the top enclosure Raise the top enclosure up slightly to verify that the slider knobs and switch button caps are correctly positioned through their openings in the top enclosure Align the center screw hole on front panel edge with the thread marks in the extrusion and install the screw that secures the front panel edge of the Slider Board See Figure 4 9 Place the PC board clamp in position Align the center screw holes of the PC board clamp with the thread marks in the extrusion and install the two screws that secure the PC board clamp Connect the wire trap flat ribbon cables in the following order Caution Be sure to look for the marking on the edge of the cable denoting Pin 1 and that you match it correctly with Pin 1 on the board Make certain that the wires are straight prior to inserting them into the connector and that each wire is correctly inserted into its respective position Note Be sure the sides of the connector are lifted Insert
104. e 18 screws that secure the board to the keyboard chassis 3 Connect the bass end of the flat ribbon cable and reapply the nylon tape to the connector 4 24 PC2 PC2X Disassembly Assembly PC2 Keyboard Assembly Removing the Keyboard Contact Strips 1 Place the keyboard upside down on a flat soft surface Be sure that the keys are resting on a soft surface to avoid scratching or other damage 2 Follow the procedure for removing the Bass and Treble Keyboard Contact Boards on page 4 24 3 Examine the keyboard contact strips and look at the design of an individual contact The top portion of the contact has two indentations One indentation is deeper than the other When replacing the keyboard contact strips the deeper indentation is always positioned toward the rear of the key 4 The keyboard contact strips have mounting pegs that secure the contact strips to the keyboard contact boards 5 To remove a keyboard contact strip gently lift and free the strip from its position Be careful not to rip or damage any contact in the process Pivot location gt Front of key Key spring location 4 Strikes the front and rear key contact on key depression PC board MEN 771 4 Key contacts side view Mounting pegs 7 1 lt _ Key contacts top view Deeper contact to back Figure 4 15 Side view of the natural white key 76 note keyboard Replacing the Keyboard Contact Strips 1 Position
105. e to location 202 on the Mod Wheel Assembly If you are servicing a PC2X connect the two flat flex cables to locations 202 and J208 on the Mod Wheel Assembly Reapply the nylon reinforced tape to the flat flex cable s Lower the Mod Wheel Assembly into position Slide the unit forward and install the four screws and washers to secure the Mod Wheel Assembly to the bottom enclosure PC2 PC2X Disassembly Assembly PC2 Keyboard Assembly PC2 Keyboard Assembly This section describes the removal and replacement of the PC2 76 note Keyboard Assembly See page 4 26 for the corresponding procedures for the PC2X 88 note Keyboard Assembly Removing the PC2 Keyboard Assembly The following procedure assumes that the PC2 is open and that you have followed the instructions on page 4 4 to remove the top enclosure The PC2 keyboard is mounted onto a wooden spacer and is secured to the wooden spacer with 16 screws The Keyboard Assembly refers to the keyboard and the wooden spacer The assembly is secured to the bottom enclosure with eight screws Note The following steps describe the procedure to remove the keyboard from the PC2 and the wooden spacer to gain access to the keys contacts contact boards and key weights If you need to gain access to the keys only i e key replacement you can do so by following the procedure described on page 4 21 Disconnecting the PC2 Keyboard 1 Refer to Figure 4 11 This illustration shows the locations
106. e wire flat ribbon cable from the Engine Board into the wire trap connector at J302 on the Connector Board Insert the ten wire flat ribbon cable from the Engine Board into the wire trap connector at J303 on the Connector Board Connect the stranded wire cable from the Headphone Volume Power Switch Board to 822 Connect the flat ribbon cable from the Right Front Panel Board to J304 Be sure to install the cable locking clip Connect the stranded wire cable from the Engine Board to J301 PC2R Disassembly Assembly Opening the PC2R Removing the Polyphony Expansion Board PCX 1 The Polyphony Expansion Board is mounted onto the Engine Board and held in place with four nylon PC board standoffs and a 24 pin female connector on the underside of the board It is also secured to the bottom enclosure with two screws 1 Remove the two screws that secure the PCX 1 Board to the bottom enclosure 2 Squeeze the top of one of the four nylon PC board standoffs and lift the corner of the board until it clears that standoff Repeat for the other three standoffs 3 When the board is free of the standoffs lift the board straight up to disconnect the 24 pin connector from the Engine Board 24 pin female connector on PCX 1 board uu 8 RR 8 QQ Qe ne 24 pin male header on Engine board Figure 3 3 Removing the Polyphony Expansion Board PCX 1 Replacing the Polyphony E
107. ector Board Remove the nut and flat washer that secure the headphone jack to the front panel mounting plate Remove the volume knob Remove the nut and flat washer that secure the volume power switch to the front panel mounting plate Refer to Figure 3 6 This illustration shows the location of a soldered connection between the Left Front Panel and Headphone Volume Power Switch Boards To remove the board desolder this connection from the Headphone Volume Power Switch Board Note This illustration shows the Headphone Volume Power Switch Board lying flat to indicate the connection between it and the Left Front Panel Board In its normal position it is perpendicular to the Left Front Panel Board Remove the Headphone Volume Power Switch Board Replacing the Headphone Volume Power Switch Board 1 2 3 4 5 Position the Headphone Volume Power Switch Board on the mounting bracket Install the nut and washer that secure the headphone jack to the mounting bracket Install the nut and washer that secure the volume power switch to the mounting bracket Install the volume knob Refer to Figure 3 6 Solder the wire connection from the Left Front Panel Board to Pin 5 of J2 on the Headphone Volume Power Switch Board Follow the procedure on page 3 9 to install the front panel faceplate Note Be sure that the Volume Power Switch moves freely Follow the procedure on page 3 8 to install the Front Panel Assembly Cha
108. ed 8 DEREN die ai eere etd 3 1 Opening 32 Kurzweil PC2 Series Service Manual Contents Removitie the Top Cover zn een 3 2 Replacing tie Top een ee 3 2 Ketnovine the Connector sk a 3 3 Replacing theConnector or RE 3 4 Removing the Polyphony Expansion Board PCX T nen asien anne an 3 5 Replacing the Polyphony Expansion Board ROK ur eec titor 3 5 Removitie the Engine Boat nn ati oem ied teu Dd 3 6 Replacing ea tes hanes 3 6 Front Panel Assembly teme eerie HR nre aga ER 3 8 Remove Ie Pronc Panel Assembly 3 8 Replacing the Front Panel ea 3 8 Removing theFr nt Panel Ace Le te aca e eu ut ed eM 3 9 Replacing the Front Panel Pace py ate an un 3 9 Front Panel Boards nct e Rer TEE gerade eerte dites nennen 3 9 Removing the Right Front Panel Boarder te petes UI petrus bsp 3 10 Replacing the Right Front Panel Boafd o 3 11 Removinsiihe LED Board equino lange 3 11 Replocine dte LCD Boat neue Meere ers 3 12 Ketnovine the Left Front Panel Board ana ken ek 3 12 Replacing the Lett Krone Panel Board a
109. ed and successfully interfacing with the microprocessor A failure of this test indicates a problem with Lisa related circuitry or the Engine Board Sound ROM This test confirms that the Sound ROMs can be read by the MABELs by performing a checksum of the Sound ROMs The computed checksum is then compared to the stored checksum A failure of this test may indicate a problem with a Sound ROM 019 U20 or the Engine Board ZRAM MIDI LED Diagnostics Description of Tests This test performs a quick read write of the internal RAM and verifies that the data was successfully written and retained A failure of this test may indicate a problem with the RAM or the Engine Board The MIDI test performs a loop back of the serial port by sending a 23 byte pattern over the external MIDI link This test requires a MIDI loop a MIDI cable that connects two MIDI jacks The test will fail if a MIDI cable is not connected between two MIDI jacks Be sure to run this test with MIDI cables connected as follows Note Be sure to use a known working MIDI cable 1 Connect a MIDI cable to the MIDI In and MIDI out jacks and run the test 2 Connect a MIDI cable to the MIDI In and MIDI Out Thru jack and set the Out Thru switch on the rear panel to Out Run the test A failure of this test could be caused by failure of the serial port other MIDI circuitry or a problem on the Connector Board or the Engine Board This test lights all the
110. embly and connect the Aftertouch flex cable Be sure to reapply the nylon reinforced tape that secures the flex cable to the bottom enclosure Place the Mod Wheel Assembly in its position on the bottom enclosure Move the PC2 forward so that the front hangs over the edge of your work surface and install the four keyboard front screws Install the four Mod Wheel Assembly screws and washers Slide the PC2 back onto your work surface Tilt the PC2 up and install the four keyboard rear screws AA PC2 PC2X Disassembly Assembly PC2 Keyboard Assembly Disconnecting the PC2 Keyboard Follow this procedure if you are merely replacing one or more keys 1 2 Refer to Figure 4 11 Tilt the PC2 up and remove the four keyboard rear screws then lay the PC2 flat on your work surface Move the PC2 forward so that the front hangs over the edge of your work surface giving you access to the remaining screws Remove the four keyboard front screws Caution The keyboard Aftertouch flex cable from the keyboard is connected to the Mod Wheel Assembly and is secured to the bottom enclosure with reinforced tape When following the instructions below be certain that you only slightly lift or move the Keyboard Assembly to avoid damage to the flex cable The 16 screws that secure the keyboard to the wooden spacer rest in holes provided for them on the bottom enclosure To move the keyboard lift the keyboard up slightly to free the 16 screws from t
111. en compared to the stored checksum A failure of this test indicates a problem with a Sound ROM 015 or U16 or the PCX 1 Board Chapter 3 PC2R Disassembly Assembly Introduction This chapter contains all the procedures for the disassembly and reassembly for the PC2R as well as instruments with factory installed or after market options A Warning If possible save all user programs and setups before disassembly For instructions 4 refer to Saving User Data in Chapter 5 page 5 1 Cables Connectors Flat Ribbon Cables All flat ribbon cables with connectors are keyed and therefore cannot be reversed Most flat ribbon cables have locking cable clips Be sure to reapply the clips when connecting cables Flat ribbon cables that connect to picoflex connectors do not have locking cable clips Some flat ribbon cables have exposed wires that insert directly into a wire trap connector When disconnecting and connecting these cables you must look for the marking on the edge of the cable denoting Pin 1 and be sure that you match it correctly with Pin 1 on the board Cable Routing In some cases tape secures cable connections or fastens cables to the bottom enclosure Always peel back the tape from one side when disconnecting cables so that the tape remains properly positioned Required Tools and Materials e No 1 Phillips head screwdriver e No 2 Phillips head screwdriver Small flat screwdriver e Needle nose pliers PC2R
112. er buttons Front Panel Buttons To test a button press any front panel button An example of the expected test result for the Solo button follows BUTTON Sala Alpha Wheel To test the Alpha Wheel turn it to increase or decrease the value by one The expected test result when the Alpha Wheel is turned is one of four values 0 1 2 or 3 3 Front Panel Knobs To test Knobs A D or the Volume potentiometer turn a knob to check its value at the bottom zero far left and at the top far right An example of the normal test results for the Knob A follows your results may vary slightly At zero far left SLIDER 1 H At top far right SLIIER 1 255 Troubleshooting Scanner Tests PC2 Keyboard Models The Scanner Tests for the PC2 keyboard models include separate tests for the front panel buttons and LEDs front panel sliders including the Master Volume slider the Alpha Wheel the Mod and Pitch wheels the keyboard and the pedals To enter the Scanner Tests first turn on the PC2 Once the PC2 is on and ready to play simultaneously hold down the 4 5 and 6 buttons front panel LEDs will flash and the LCD will display the following Figure 5 3 LCD example PC2 scanner tests The first line of the display shows the scanner software version as well as the battery voltage and the current value for the Mod Wheel position The second line shows the results of the current test Figure 5 3 shows the
113. es rack models 1 7 Front Panel Assembly rack models description front panel boards 3 9 diagram 3 8 diagram front panel faceplate 3 10 diagram Headphone Vol Pwr Sw Board connection 3 13 parts list 6 14 removing the front panel assembly 3 8 removing the front panel faceplate 3 9 replacing the front panel assembly 3 8 replacing the front panel faceplate 3 9 Front Panel Board cables keyboard models 4 11 diagram keyboard models 4 11 parts list 6 5 removing keyboard models 4 10 replacing keyboard models 4 12 Front Panel Knobs Test scanner tests PC2R 5 7 H Headphone amp Power Switch Assembly parts list 6 15 Headphone Volume Power Switch Board removing rack models 3 14 replacing rack models 3 14 K Keyboard Dead 5 12 Dead Note s 5 12 noise 5 12 scanner testsPC2 5 9 Keyboard Assembly parts list 76 note keyboard models 6 10 parts list 88 note keyboard models 6 12 Keyboard Assembly 76 note keyboard models connecting the keyboard 4 21 contact boards 4 24 disconnecting the keyboard 4 21 key spring diagram 4 23 natural white keys description 4 23 removing contact strips 4 25 removing keys 4 22 removing the keyboard 4 19 replacing contact strips 4 25 replacing keys 4 24 replacing the keyboard 4 20 sharp black keys description 4 23 Keyboard Assembly 88 note keyboard models contact boards 4 30 4 31 diagram key weights 4 32 key spring diagram 4 29 natural white keys description 4 28 removing a key
114. es Communications du Canada SAVE THESE INSTRUCTIONS Young Chang Distributors Contact the nearest Young Chang office listed below to locate your local Young Chang Kurzweil representative A N D Music Corp P O Box 99995 Lakewood WA 98499 0995 Tel 253 589 3200 Fax 253 984 0245 Young Chang Akki Co Ltd 178 55 Gajwa Dong Seo Ku Inchon Korea 404 250 Tel 011 82 32 570 1380 Fax 011 82 32 570 1218 Young Chang America Inc Canadian Division P O Box 61515 9350 Yonge Street Richmond Hill Ontario Canada 3N0 Tel 905 508 0531 Fax 905 508 1308 Contents Young Chang sense iii Chapter 1 Introduction Models55 3 5 5m enin en Dr RE 1 1 Notes Cautions Warnings etes eee pq e inen eoe 1 1 PCP PCI ES na V DEMEURE eed vede N 1 2 PC2 PCOX Rear PE 1 2 Rear Panel Features ani sales AE PE X FE EH 1 2 PC PG2Xbront Panebs252 Er eres EORR et tendo ttes cer erem ee ener rt 1 3 Front Panel Features d eee os Her esto deese ta dod ee HL dips de Pe E e reed 1 3 PER idee uite hii ab en A Hs ee ets ee bess 1 6 gt 1 6 Rear Panel Features eee eR o e de i e 1 6 PC2R Front Panel n anser tese iei 1
115. ess panel It is not necessary to remove the five remaining access panel screws 4 Slide the unit back onto the work surface 4 2 PC2 PC2X Disassembly Assembly Opening the PC2 PC2X PC2X Bottom Refer to Figure 4 2 Arrows indicate the locations of the enclosure support wall endcap and rear smeJos deopu3 YY panel screws Keyboard e ee e e e e p Enclosure support wall screws e e T Access panel j o o LL _ d d Rear panel screws Rear panel Endcap locking bracket screws ES X Figure 4 2 PC2X bottom enclosure lt lt Endcap screws Caution Do not remove the endcap or rear panel screws at this point of the procedure 1 Tilt the PC2X up and remove the eight enclosure support wall screws 2 Place the unit flat on your work surface 3 Move the unit so that the rear panel portion of the unit hangs over the edge of your work surface This gives you access to the nine screws that secure the rear panel portion of the top enclosure to the bottom enclosure Remove the nine screws Note Two of the rear panel screws also secure the rear panel edge of the access panel It is not necessary to remove the five remaining access panel screws 4 Slide the unit back onto the work surface 4 3 PC2 PC2X Disassembly Assembly Opening the PC2 PC2
116. est Figure 2 3 LCD example Run One Test Diagnostics Test Results At the completion of a test whether pass or fail press the Cancel button to exit the test Press either the Left of Right cursor button to advance to the next test or another test in the sequence At the completion of a test press the Cancel button to return to the test menu To exit diagnostics turn the power off and on to return to normal operation Run Burn in Burn in continuously runs the following sequence of tests e ROM e Read write Sound ROM e e MIDI If a PCX 1 Board is installed the sequence of tests is as follows e ROM e Read write e MIDI PCX 1 ROM e PCX 1 read The LCD displays the test results at the completion of each test To stop the burn in process and view the test results for each test run press the Cancel button Use the Left or Right cursor button to scroll through the results of each test To exit Run Burn in and return to the main menu press the Cancel button To exit diagnostics turn the power off and on to return to normal operation 2 Note If a PCX 1 Board is installed you must cycle the power after running the SROM or PCX 1 SROM tests If you do not cycle the power some tests may not run properly Test Results The top line of the LCD displays the test name to the left and test result to the right Additional information if any is displayed on the bottom line of the LCD At the completion
117. flat ribbon cables from the keyboard are correctly positioned to connect them to the Connector Board Note If you have disconnected the Bass and Treble ends of the flat ribbon cables from the keyboard contact boards during service be sure that you have reconnected them and secured them with tape Be sure that the small ribbon cable connecting the Bass and Treble Contact Boards is connected Connect the flat ribbon cables to J306 and J307 on the Connector Board and reapply the cable locking clips Secure the flat ribbon cables to the bottom enclosure Be sure to reapply the nylon reinforced tape that secures the cables to the bottom enclosure Lift the Mod Wheel Assembly and connect the Aftertouch flex cables Be sure to reapply the nylon reinforced tape that secures the flex cables to the bottom enclosure Slide the PC2X forward so that you can install the five keyboard front screws Install the four Mod Wheel Assembly screws and washers Slide the PC2X back on to your work surface Tilt the PC2X up and install the five keyboard rear screws Removing Keys 1 The following procedure assumes you have removed the top enclosure from the PC2X Follow the procedure for removing the keyboard Note If you are merely replacing one or more keys it is not necessary to entirely remove the keyboard from the PC2X Once the keyboard is loose you can slide it toward the rear panel to give you enough access to remove keys The followin
118. front panel LEDs To complete the test and obtain the test result press the Cancel button When the Cancel button is pressed the LEDs shut off and the test result is shown A failure of this test may indicate a problem with the Front Panel Board s related circuitry or the Connector Board PCX 1 ROM This test checks the software data engine boot and setups stored in FlashROM on the PCX 1 Board Failure of this test may indicate a problem with the Flash ROM chip U5 on the PCX 1 Board associated circuitry or the PCX 1 Board PCX 1 RW This test is a combination of the RAM MABEL and LISA tests This test writes data to RAM and the MABEL and LISA registers then confirms that the data written can be read back successfully A failure of this test indicates a problem with the PCX 1 Board PCX 1 RAM The PCX 1 RAM test writes to the microprocessor RAM space and verifies that the write was successful A failure of this test may indicate a problem with the RAM or related circuitry on the PCX 1 Board Diagnostics Description of Tests PCX 1 MABEL This test performs a read write of the MABEL registers and verifies that the data written can be read back successfully A failure of this test may indicate a problem with a MABEL associated circuitry or the PCX 1 Board PCX 1 SROM The PCX 1 SROM test verifies that the PCX 1 MABELs can read the Sound ROMs by performing a checksum of the Sound ROMs The computed checksum is th
119. g diagrams illustrate the outlines of the natural and sharp keys and the location and functions of the components described in the following procedures 4 21 PC2 PC2X Disassembly Assembly PC2X Keyboard Assembly Natural White Key Pivot location Key spring location Strikes the front and rear key Hooks under the front contact on key depression of the keyboard chassis Mounts through the keyboard chassis Figure 4 17 Natural white key 88 note keyboard Pivot location 7 Key spring locati Hooks under the front ocation of the keyboard chassis Strikes the front and rear key contact on key depression Mounts through the keyboard chassis Figure 4 18 Sharp black key 88 note keyboard Natural White Keys 1 Remove the silver key spring located at the rear of the key You will notice that the bottom of the spring is secured to the keyboard chassis by a hook You can remove the spring by inserting a dowel 3mm diameter into the spring and pushing down on it slightly Then pull the top of the dowel toward the front of the keyboard This will unhook the spring from the keyboard chassis 4 28 PC2 PC2X Disassembly Assembly PC2X Keyboard Assembly Insert the screwdriver here Insert a 3mm dia dowel into the spring and push down slightly Then move the top of the dowel toward the front of the keyboard to remove the spring from the hook E Pio chassis se
120. gure 3 5 and remove the two screws 5 Remove the three screws that secure the Right Front Panel Board to the mounting bracket and remove the Right Front Panel Board PC2R Disassembly Assembly Front Panel Assembly Replacing the Right Front Panel Board 1 e 6 Place the Right Front Panel Board in position on the mounting bracket and line up the screw holes Note Verify that the rotary potentiometers and switch button caps are correctly positioned through their openings in the front panel faceplate Turn the rotary potentiometers to be sure that they move freely and push the switch button caps to be sure that their corresponding switches click Install the three screws that secure the board to the mounting bracket Install the two screws that secure the front panel faceplate Connect the flat ribbon cable from the Connector Board to Right Front Panel Board location J601 Be sure to install the cable locking clip Connect the flat ribbon cable from the Left Front Panel Board to the Right Front Panel Board location J602 Caution The side walls of the picoflex header are different The Pin 1 side is slightly wider than the other side and the corresponding sides of the connector incorporate the differences When you connect the cable be sure to orient the marking red or black on the cable that indicates the connection to Pin 1 on the board to prevent damage to the header or a failure caused by an improper connection
121. he plug 10 Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings 11 The product should be serviced by qualified service personnel when A The power supply cord or the plug has been damaged B Objects have fallen onto or liquid has been spilled into the product The product has been exposed to rain D The product does not appear to be operating normally or exhibits a marked change in performance E The product has been dropped or the enclosure damaged 12 Do not attempt to service the product beyond that described in the user maintenance instructions All other servicing should be referred to qualified service personnel 13 WARNING Do not place objects on the product s power supply cord or place the product in a position where anyone could trip over walk on or roll anything over cords of any type Do not allow the product to rest on or be installed over cords of any type Improper installations of this type create the possibility of a fire hazard and or personal injury RADIO AND TELEVISION INTERFERENCE WARNING Changes or modifications to this instrument not expressly approved by Young Chang could void your authority to operate the instrument IMPORTANT When connecting this product to accessories and or other equipment use only high quality shielded cables NOTE This instrument has been tested and found to comply with the limits for a Class A dig
122. he flat ribbon cable from J304 Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable Disconnect the stranded wire cable from J322 The flat ribbon cables connected to J302 and J303 use wire trap connectors The shielding has been removed from these cables to expose the wires The wires are directly inserted into these connectors Lift up the sides of each connector This unlocks the trap to free the cable wires Gently pull each cable up out of the connector Note the marking red or black on each cable that indicates the connection to Pin 1 you ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Connector Board Remove the two screws that secure the MIDI jacks to the rear panel Remove the two nuts that secure the 1 4 audio out jacks to the rear panel Remove the three screws that secure the Connector Board to the bottom enclosure Caution VR1 on the Connector Board is attached to the heat sink When you remove the Connector Board and heat sink be sure to keep the board and heat sink stable so that you do not damage 1 or its connection Remove the four screws that secure the heat sink to the bottom enclosure Slide the Connector Board and heat sink away from the rear panel and toward the Front Panel Assembly This will free the jacks and MIDI switch from their positions on the rear panel Tilt up the rear panel edge of the Connector Board and heat
123. heir positions on the bottom enclosure Lift the keyboard up and move it approximately one inch to the right as viewed standing at the keyboard You can now move the keyboard back approximately one inch toward the rear so that you can remove keys for replacement See page 4 22 for the procedure to remove and replace keys Connecting the Keyboard 1 Position the keyboard so that the 16 screws that secure the wooden spacer to the keyboard are resting in the holes provided for them on the bottom enclosure Caution Be certain that the Aftertouch flex cable is correctly positioned and that the nylon reinforced tape securing it to the bottom enclosure is still properly applied Refer to Figure 4 11 Move the PC2 forward so that the front hangs over the edge of your work surface and install the four keyboard front screws Slide the PC2 back onto your work surface Tilt the PC2 up and install the four keyboard rear screws 4 21 PC2 PC2X Disassembly Assembly PC2 Keyboard Assembly Removing Keys The following procedure assumes you have removed the top enclosure from the PC2 1 Follow the procedure for removing the keyboard page 4 19 or disconnecting the keyboard page 4 21 2 The following diagrams illustrate the outlines of the natural and sharp keys and the locations and functions of the components described in the following procedures Natural White Key Pivot location Key spring 7 C location
124. ion is positioned toward the rear of the key 2 Line up the contact strip mounting pegs with their respective mounting holes on the keyboard contact board 3 Using a small blunt end tool O Tip toothpick etc gently push the mounting pegs through the holes Do not use too much force or use a tool that can poke a hole through the mounting pegs However be sure that the mounting pegs are installed through the holes Removing a Key Weight 1 The main components of the weighted key action consist of the following the 88 keys two rods 88 key weights and support brackets for the key weights and rods There are seven 12 position brackets and one 4 position bracket 72 Note Key weights are attached to one of the two rods that span the length of the keyboard The first rod is referred to as the bass rod and the second rod is referred to as the treble rod The first rod the bass rod begins at low A and extends to G above Middle C The second rod the treble rod begins at A above Middle C and extends to High C 2 To replace a key weight identify the section with the broken key weight and remove all the keys from that section The key weights rods and support brackets are now visible 3 There is a locking clip at each end of the keyboard To remove the locking clips use a standard screwdriver to pry the locking clips off 4 Pry the rod up from the support bracket The key weights remain attached to the rod 5 To rem
125. ioned Required Tools and Materials e No 1 Phillips head screwdriver e No 2 Phillips head screwdriver Small flat screwdriver e Dowel 3mm diameter e Needle nose pliers Small blunt end tool Q Tip toothpick etc e Foam blocks PC2 PC2X Disassembly Assembly Opening the PC2 PC2X Opening the PC2 PC2X PC2 Bottom Refer to Figure 4 1 Arrows indicate the locations of the enclosure support wall endcap and rear panel screws Keyboard gt ooo o m o o o o e e zi o o e 2 8 5 a gt le Enclosure support wall screws e 8 m 9 E o o o o 8 o0 o E E Ra 2 do o o pA F gt o o o o L t t 1 Rear panel screws Rear panel Endcap locking bracket screws Figure 4 1 PC2 bottom enclosure Z N Caution Do not remove the endcap or rear panel screws at this point of the procedure EN 1 Tilt the PC2 up and remove the eight enclosure support wall screws 2 Place the unit flat on your work surface 3 Move the unit so that the rear panel portion of the unit hangs over the edge of your work surface This gives you access to the seven screws that secure the rear panel portion of the top enclosure to the bottom enclosure Remove the seven screws Note Two of the rear panel screws also secure the rear panel portion of the acc
126. ital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the instrument is used in a commercial environment This instrument generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this instrument in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his or her own expense Changes and modifications not expressly approved by the manufacturer or registrant of this instrument can void the user s authority to operate this instrument under Federal Communications Commission rules In order to maintain compliance with FCC regulations shielded cables must be used with this instrument Operation with unapproved equipment or unshielded cables is likely to result in harmful interference to radio and television reception NOTICE This apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications AVIS Le present appareil numerique n emet pas de bruits radioelectriques depassant les limites applicables aux appareils numeriques de la class A prescrites dans le Reglement sur le brouillage radioelectrique edicte par le ministere d
127. ition on the pivot 3 Install the spring Servicing the Keyboard Contact Boards Follow the procedure on page 4 19 to remove the Keyboard Assembly 1 Place the keyboard upside down on a flat soft surface Be sure that the keys are resting on a soft surface to avoid scratching or other damage The Treble and Bass Contact Boards are now visible Removing the Treble Contact Board 1 Peelback the nylon tape securing the connector and disconnect the flat ribbon cable from the Treble Contact Board 2 Remove the 24 screws that secure the Treble Contact Board to the keyboard chassis and remove the Treble Contact Board Replacing the Treble Contact Board 1 Position the Treble Contact Board on the keyboard chassis Be sure that the rubber key contacts line up properly through the holes in the keyboard chassis 2 Install the 24 screws that secure the board to the keyboard chassis 3 Connect the treble end of the flat ribbon cable and reapply the nylon tape to the connector Removing the Bass Contact Board 1 Peelback the nylon tape securing the connector and disconnect the flat ribbon cable from the Bass Contact Board 2 Remove the 18 screws that secure the board to the keyboard chassis and remove the Bass Contact Board Replacing the Bass Contact Board 1 Position the Bass Contact Board on the keyboard chassis Be sure that the rubber key contacts line up properly through the holes in the keyboard chassis 2 Install th
128. king clips safely aside so that you can install them when you reconnect the cables Note The cables used throughout the PC2 PC2X are bundled and routed so that their locations and destinations seem obvious However to avoid reversing the Bass and Treble cables when reconnecting mark one or both cables designating B for Bass and T for Treble The flat ribbon cables connected to J302 J303 J305 and J308 use wire trap connectors The shielding has been removed from the end of these cables to expose the wires The wires are directly inserted into these connectors Lift up the sides of each connector This unlocks the trap to free the cable wires Gently pull each cable up out of the connector Note the marking red or black on each cable that indicates the connection to Pin 1 you ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Connector Board Remove the five screws that secure the Connector Board to the rear panel Two of these screws are longer than the others and have spacers located between the screw and the rear panel See Figure 4 7 for the locations of the screws and spacers Note Do not remove any other hardware from this portion of the rear panel Power MIDI Pedals Inputs Audio Outs 1 0 Adapter In 9 0V 20 14 0V 0 25A Digital Out Switch Continuous Breath Ribbon That Font In Thru Out Out vant 1 2 3 1 2 Left Right Headphones Li Cont gt lt
129. l device Press the Global button on the PC2 Press the Right cursor button until the LCD displays Dumt all Objects Begin recording on the MIDI recording device Press Enter on the PC2 The LCD shows the objects being saved When all objects are saved Dium all Objects will appear in the LCD To reload the saved objects connect a MIDI cable from the MIDI Out port of the recording device to the PC2 s MIDI In port From the external device begin the playback of the file Troubleshooting Boot Block Boot Block Use the PC2 s Boot Loader to enter Diagnostics or perform a Hard Reset to the unit You can also install operating system updates and ROM objects into Flash ROM Entering the Boot Block Apply power to the unit When the Please wait message appears in the LCD quickly press and release the Panic button for PC2 keyboard units or Edit button for PC2R rack units The LCD displays the main menu of the Boot Loader and the first available option Use the Left or Right cursor button to advance to the next option The menu options are as follows Install Engine Installs new operating system software upgrades Install ROM option Loads Sound ROM presets after installing a Sound ROM option Update boot block Installs boot block updates Run diagnostics Enters the diagnostic test menu For a complete list of tests and the procedure to execute the diagnostic tests refer to Chapter 2 Diagnostics Run engine Exits the
130. lat ribbon cable from the LCD Board to J406 Be sure to install the cable locking clip 6 Connect the wire trap flat ribbon cables in the following order PC2R Disassembly Assembly Opening the PC2R Caution Be sure to look for the marking on the edge of the cable denoting Pin 1 and that you match it correctly with Pin 1 on the board Make certain that the wires are straight prior to inserting them into the connector and that each wire is correctly inserted into its respective position Note Be sure the sides of the connector are lifted Insert the flat ribbon cables into the wire trap connectors and push down the sides of each connector to lock the cable into the connector Gently pull each cable to verify that it is locked into its connector Insert the five wire flat ribbon cable from the Connector Board into the wire trap connector at J412 on the Engine Board Insert the ten wire flat ribbon cable from the Connector Board into the wire trap connector at J403 on the Engine Board Connect the flat ribbon cable from the Right Front Panel Board to J304 on the Connector Board Be sure to install the cable locking clip If you removed a PCX 1 Board install it following the procedure on page 3 5 PC2R Disassembly Assembly Front Panel Assembly Front Panel Assembly The Front Panel Assembly consists of the front panel faceplate a mounting bracket for the front panel boards and four printed circuit boards The boards mounted on the
131. lect parameters that affect the entire unit The Global button opens a menu of parameters such as checking the version of the operating system available memory performing a reset dumping all objects and running MIDIScope The MIDI Receive button opens a menu to configure individual MIDI channels The Panic button sends an All Notes Off message to the PC2 and the MIDI Out port On power up the Panic button is also used to enter the boot block to perform diagnostics operating system updates etc Introduction PC2 PC2X Sound Setup Select Effects and Reverb Internal MIDI Voices Setups Mode Piano 1 Piano2 EPiano1 EPiano2 Clavier Organ Brass FX A Select Wet Dry 1 2 3 4 5 6 7 8 Previous Next Mute A 4 Group Strings Voices Synths Pads Guitar Bass Drums Percussion FX B Select FX Mode 11 12 13 14 15 16 Mute B L Demo Figure 1 5 Sound Setup Select and Effects and Reverb sections Sound Setup Select Three groups of buttons are included in this section Use the buttons in the first group to select one of the three performance modes Internal Voices MIDI Setups or KB3 Mode The second group Previous Group and Next Group is for use in the Internal Voices and MIDI Setups modes only Depending on which mode you re in they select the previous or next group of programs or setups Use the
132. les 3 Remove the cable locking clip and disconnect the flat ribbon cable from J304 on the Connector Board Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable 4 The flat ribbon cables connected to J403 and J412 use wire trap connectors The shielding has been removed from these cables to expose the wires The wires are directly inserted into these connectors Lift up the sides of each connector This unlocks the trap to free the cable wires Gently pull each cable up out of the connector Note the marking red or black on each cable that indicates the connection to Pin 1 you ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Engine Board 5 Remove the cable locking clip and disconnect the flat ribbon cable from location J406 on the Engine Board Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable 6 Disconnect the stranded wire cables from locations J402 and J405 on the Engine Board 7 Remove the five screws that secure the Engine Board to the bottom enclosure and remove the Engine Board Replacing the Engine Board 1 Place the Engine Board on the bottom enclosure 2 Install the five screws that secure the Engine Board to the bottom enclosure 3 Connect the stranded wire cable from the Connector Board to J402 4 Connect the stranded wire cable from the LCD Board to J405 9 Connect the f
133. mounting bracket Install the screw that secures the front panel faceplate to the Front Panel Assembly Connect the stranded wire cable from the LCD Board to location J405 on the Engine Board If the unit you are servicing has a PCX 1 Board installed route the flat ribbon cable beneath the board and connect it to location J406 on the Engine Board Be sure to install the cable locking clip Follow the procedure on page 3 8 to install the Front Panel Assembly Removing the Left Front Panel Board 1 2 N 20 3 4 5 20 3 12 Remove the Front Panel Assembly as described on page 3 8 It is not necessary to disconnect all the cables that connect the Front Panel Assembly boards to boards located on the bottom enclosure Disconnect the flat ribbon cable from J603 This cable uses a picoflex molex connector To disconnect it grip the connector and pull it out straight Caution Do not wiggle the connector back and forth Doing so could cause damage to the header Note Be aware of the marking red or black on the cable that indicates the connection to Pin 1 you ll need to reconnect the marked edge of the cable to Pin 1 when you replace the board It is not necessary to remove the front panel faceplate to remove the Left Front Panel Board One screw that secures the front panel faceplate to the Front Panel Assembly is located above the Left Front Panel Board Refer to Figure 3 5 and remove the screw Remove the two screws that
134. moving 76 note keyboard models 4 24 removing 88 note keyboard models 4 30 replacing 76 note keyboard models 4 24 replacing 88 note keyboard models 4 30 4 31 Contacts troubleshooting 5 12 D Diagnostic Test Modes description 2 2 Diagnostic Tests LED 2 5 LISA 2 4 MABEL 2 4 MIDI 2 5 PCX 1 MABEL 2 6 PCX 1 RAM 2 5 PCX 1 ROM 2 5 PCX 1 RW 2 5 PCX 1 SROM 2 6 RAM 2 4 Read write 2 4 ROM 2 4 Sound ROM 2 4 ZRAM 2 5 Diagnostics Burn in Tests 2 3 entering tests 2 2 list of tests 2 1 test results 2 3 Diagram keyboard models bottom enclosure 76 note keyboard 4 2 4 19 bottom enclosure 88 note keyboard 4 3 4 26 Connector Board hardware 4 9 Engine Board 4 16 Front Panel Board 4 11 front panel layout 1 3 1 4 1 5 Interconnect 5 14 key spring 76 note keyboard 4 23 key spring 88 note keyboard 4 29 key weights 88 note keyboard models 4 32 rear panel 1 2 4 4 Slider Board 4 14 Kurzweil PC2 Series Service Manual top cover and bottom enclosure 4 5 top enclosure board locations 4 7 top enclosure enclosure support wall locations 4 7 Diagram rack models front panel 1 6 1 7 1 8 front panel assembly 3 8 front panel faceplate 3 10 Headphone Vol Pwr Sw Board connection 3 13 Interconnect 5 13 rear panel 1 6 removing the Polyphony Expansion Board PCX 1 3 5 removing the top cover 3 2 Disassembly instructions 76 note Keyboard Assembly contact boards 4 24 disconnecting the keyboard 4 21 removing contact strips 4 25 removing keys
135. mp R 6 R17 20 94 95 97 98 N051064016 RES TF 1 6KQ 596 1 16W 0603 1 118 N051064022 RESTF 2200 5 1 16W 0603 2 R100 101 N051064110 RES TF 109 5 1 16W 0603 T amp R 13 R1 3 12 14 24 108 109 121 126 128 144 147 N051100010 RES NET QUAD ISO 10KQ 5 1 16W 4 RP9 12 N05110001 1 RES NET QUAD ISO 1009 5 1 16W 3 RP6 8 N051101706 RES 470 5 1 8W 1206 2 R134 137 N051101708 RES CF 569 5 1 8W 1206 2 R4 5 N051101721 RES CF 2700 5 1 8W 1206 1 R6 N051101724 RES 470 5 THICK FILM 1206 2 R18 117 N051101730 RES CF 1 0KQ 596 1 8W 1206 2 R120 148 N051101734 RES TF 1 5KQ 5 1 8W 1206 1 R22 N051101780 RES CF 100KQ 5 1 8W 1206 1 R15 N051101790 RES CF 1 0MQ 5 1 8W 1206 3 R11 16 119 N051102103 RELAY 5V DPDT G6H 2 DC5 1 RY1 N051103151 RES TF 15 00KQ 1 1 8W 1206 8 R122 123 132 133 135 136 138 142 N051120030 RES TF 3 0KQ 5 1 8W 1206 3 R106 127 129 N051120056 RES TF 5 6KQ 5 1 8W 1206 1 R8 N051125201 RES TF 2009 5 1 4W 1210 4 R124 130 139 141 N052001204 CER MONO 250 0 1UF 50V 20 3 C1 3 N052001223 CAP CER MONO 0 22UF 50V 20 AX 1 C39 N052001711 CAP ELECT 100UF 25V 20 RAD 4 C28 34 36 37 N052001712 CAP ELECT 1000UF 25V RAD 1 C30 N052002412 CAP ELECT 470UF 25V 20 2SP 1 C31 N052007401 CAP CER NPO 100PF 50V 5 1206 2 C46 55 N052007503 CAP CER X7R 0 1UF 50V 10 1206 16 C29 32 33 35 38 41 42 44 45 49 54 56 N052007810 CAP CER X7R 1000PF 50V 10 0603 10
136. n without the express written consent of Young Chang Co Ltd is prohibited S70 TACT PC 88 II FRONT PANEL and IBBB FP Buttons and LEDs Filename 021199B1 Date 11 29 99 By DMH Sht 1 of2 Kurzweil PC2 Series Service Manual J701 IBBB LEDROWO LEDROW1 SWROWO SWROW1 COL4 YOUNG CHANG CO LTD Reproduction without the express written consent of Young Chang Co Ltd is prohibited PC 88 II FRONT PANEL and IBBB IBBB Buttons and LEDs Date 11 29 99 By DMH Sht2 of 2 Filename 021199B1 Kurzweil PC2 Series Service Manual 7 10 RESET 3 B1 PWRUPRST 3 A8 TOUCHSENS 2 D5 VBAT J308 WHEELS 5Vret 2 A1 C3 5VREF WHEEL1 RESETOUT WHEEL2 PRESSR AGND NC RP11 10K EXPDL2 2 B3 EXPDL1 2 A3 RIBN SLDR 2 C5 BREATH 2 03 C1 C2 PORT57 1000pfa 1000pfa 1000pfa MONOSENS 3 D1 57 PORT56 PORT55 PORT54 PORT53 PORT52 PORT51 50 O
137. nect the Kurzweil Ribbon Controller option Audio Outs Balanced 1 4 left and right audio output jacks to connect to an amplifier mixer or sound system Headphones Standard 1 4 jack to connect headphones PC2 PC2X Front Panel Introduction PC2 PC2X Figure 1 2 is an illustration of the front panel for the PC2 and the PC2X Enlargements of sections of this illustration follow as well as a brief description of the front panel features LCD and cursor buttons Zone Parameters Parameters System Sound Alpha Wheel Minus and Plus buttons Alphanumeric keypad Zone Select and Assignable Controllers 1 Zone Parameters Sound Parameters System Data Entry on Meum Tis dose Main Layer Split Split Layer Zonet Zes m E Functions TTE 4 SOU U X 0 0 EU 2 Bip Ep 7
138. nector Board Mod Wheel Assembly Table 4 1 Top cover and bottom enclosure cables 4 5 PC2 PC2X Disassembly Assembly Opening the PC2 PC2X Replacing the Top Enclosure 1 2 20 3 4 Position the top enclosure behind the bottom enclosure Move the top enclosure so that the bottom edge of the rear panel is positioned under the bottom enclosure edge See Figure 4 4 on page 4 5 Note Verify that the cables listed in Table 4 1 are lying flat on the bottom enclosure Be sure that all other cables are tucked between the top enclosure and the enclosure support walls Hold the top enclosure safely in place and move the unit so that one end of the rear panel edge hangs over the edge of your work surface and install the rear panel screw at that end Slide the unit back onto your work surface Repeat for other end Refer to Figure 4 1 for the PC2 or Figure 4 2 for the PC2X Warning Perform Steps 3 and 4 separately Combining these steps could cause the top enclosure to flip away from the bottom enclosure or off of your work surface Move the unit so that the rear panel edge of the unit hangs over the edge of your work surface and install the remaining screws Note If you are servicing a PC2 there are five remaining rear panel screws to install If you are servicing a PC2X there are seven remaining screws Closing the PC2 PC2X IN 1 2 3 Warning The following procedure assumes that you have completed S
139. oard parts list 6 15 removing rack models 3 10 replacing rack models 3 11 ROM diagnostic test 2 4 S Scanner Tests PC2 Alpha Wheel 5 8 Buttons 5 8 Front Panel Sliders 5 8 Keyboard 5 9 Mod Wheels 5 9 Pedals continuous 5 9 Pedals switch 5 9 Scanner Tests PC2R Alpha Wheel 5 7 Buttons 5 7 Front Panel Knobs 5 7 Slider Board diagram keyboard models 4 14 parts list 6 9 removing keyboard models 4 14 replacing keyboard models 4 15 Slider Test scanner tests PC2 5 8 Software Updates file formats 5 3 installing 5 3 Sound ROM diagnostic test 2 4 T Top Cover removing rack models 3 2 replacing rack models 3 2 Top Enclosure keyboard models description 4 7 diagram board locations 4 7 diagram enclosure support wall locations 4 7 removing 4 4 replacing 4 6 Troubleshooting Audio Problems 5 10 Front Panel Problems 5 11 Keyboard Problems 5 12 Power Problems 5 10 U User data saving 5 1 Kurzweil PC2 Series Service Manual Y Young Chang Distributors iii Z ZRAM diagnostic test 2 5
140. on cable from the Engine Board into the wire trap connector at J302 on the Connector Board Insert the seven wire flat ribbon cable from the Slider Board into the wire trap connector at J305 on the Connector Board Insert the six wire flat ribbon cable from the Mod Wheel Assembly into the wire trap connector at J308 on the Connector Board Insert the ten wire flat ribbon cable from the Engine Board into the wire trap connector at J303 on the Connector Board Connect the flat ribbon cables from the Keyboard Assembly to J306 and J307 Be sure to install a cable locking clip on each connector Connect the flat ribbon cable from the Front Panel Board to J304 on the Connector Board Be sure to install a cable locking clip on the connector Connect the stranded wire cable from the Engine Board to J301 on the Connector Board Follow the procedure on page 4 8 to install the right enclosure support wall Removing the Front Panel Board 1 Follow the procedure described on page 4 8 to remove the right enclosure support wall 2 Follow the procedure described on page 4 8 to remove the Connector Board 3 Following Steps 4 and 5 disconnect the cables listed in Table 4 3 PC2 PC2X Disassembly Assembly Top Enclosure Ref Name Cable Type Destination J601 IBBB flat ribbon Button Board Wheel Assembly J602 FP Bridge flat ribbon Slider Board Table 4 3 Front Panel Board cables The flat ribbon cables connected to J
141. on to select one of the three performance modes Internal Voices KB3 or MIDI Setups Three special mode buttons FX MIDI Receive and Global are also included in this section The special mode buttons perform as follows press the FX button to enter the effect edit mode press the MIDI Receive button to configure individual MIDI channels and press the Global button to select parameters that change the entire PC2R Many helpful parameters are included in the Global menu such as the operating system version available memory reset dumping all objects and MIDIScope Modes Internal Voices KB3 MIDI Setups L Panic FX MIDI Receive 3 L Demo Global Figure 1 11 Modes section and LCD Contrast The Modes section also contains buttons to select the Panic function and Demo mode These buttons are not individual buttons They are selected by simultaneously pressing two buttons To select the Panic function to send an Notes Off message simultaneously press the KB3 and the MIDI Setups buttons To enter the Demo mode simultaneously press the MIDI Receive and the Global buttons Flashing LEDs in the Performance section indicate the location of the stored demos LCD Contrast Rotary potentiometer to adjust the LCD for the best visibility Chapter 2 Diagnostics Diagnostic Tests The following lists the diagnostic tests available for the PC2 Series e ROM e Read write RAM e MABEL e
142. ont panel board you need to remove and follow the steps described Follow the procedure to remove the Front Panel Assembly Refer to Figure 3 5 on page 3 10 Four flat head machine screws secure the front panel faceplate to the Front Panel Assembly These screws are located along the top of the Front Panel Assembly Using a 1 screwdriver remove the four screws 3 Place the front panel faceplate safely aside to avoid accidental damage Replacing the Front Panel Faceplate 20 Position the front panel faceplate onto the Front Panel Assembly Note Verify that the rotary potentiometers jacks and switch button caps are correctly positioned through their openings in the front panel faceplate Turn the rotary potentiometers to be sure that they move freely and push the switch button caps to be sure that their corresponding switches click Install the four flat head machine screws that secure the front panel faceplate to the Front Panel Assembly Front Panel Boards The front panel boards are secured to a mounting bracket This bracket is secured to the front panel faceplate If the service you are performing only requires that you have access to the front panel boards for component testing component replacement or installing a replacement board it is not necessary to remove the front panel faceplate or remove the boards from the mounting bracket Figure 3 5 shows the position of the boards on the Front Panel Assembly and the pla
143. oo O1 4 PORT56 55 54 PORT53 PORT52 51 PORT50 veo a R22 FE BEAD 1 5K L1 2 FTSWS3 2 08 FTSW 2 C8 FTSW1 2 C8 10K f 12 2880M Sr DAC2 DAC1 Ut M37451 P P TxD P AIN 7 RxD P AING PWM P AIN 5 EV3 P 4 EV2 P AIN 3 EV1 P AIN 2 AIN 1 P AIN O 14 A18 P P B7 SLD7 12 P S6 SLD6 A11 P 55 8105 A10 P P S4 SLD4 A09 P P B3 SLD3 AO8 P P 52 SLD2 P B1 SLD1 07 P BOSLDO A05 P SYNC A04 P A03 P R W A02 P WR A01 P RD A00 P CLKOUT D7 P XOUT D6 P XIN D5 D4 P RESET D3 P D2 VREFADC D1 P VREFDAC DO P AVCC v 2 Yl C4 NPO 33pF NPO a 5Vref 02 AVSS WE WR P RD E P VCC CS 2 VSS1 MODE 37 36 35 34 33 32 31 30 17 16 15 14 18 12 11 10 06 05 04 03 02 01 00 INT1 P INTMIDIRxD 2 B8 INTMIDITxD 2 B8 TRO 2 C8 MUXA2 2 C5 2 C5 2 C5 U2 74HC541 18 60 CPU PORT67 PORT67 J306 PORT66 PORT65 PORT64
144. ove the key weights from the rod move the key weight side to side and pull it away from the rod The key weight should easily pop off the rod Note The natural and sharp key weights are physically different The sharp key weights LA are smaller When you remove multiple key weights do so in a way that you will be able to place the new natural and sharp key weights in their correct positions Natural White Sharp key weight key weight IR Figure 4 21 Natural White and Sharp Black key weights 6 Remove the broken key weight s and inspect the other key weights for reliability 4 32 PC2 PC2X Disassembly Assembly PC2X Keyboard Assembly Replacing a Key Weight em Each key weight has a strip of red felt attached with pliable adhesive Be sure the red felt extends onto the upper surface of the top of the key weight Place the key weight in position against the rod and snap it onto the rod with slight pressure Note Be sure to place the sharp key weights in the correct positions Place the rod and key weights into position over the support brackets and snap the rod into the support brackets Be certain that the rod is pressed securely into the support brackets Prior to replacing the keys check that each key weight moves freely To do this position a screwdriver at the back end of the key weight on the red felt press down and remove the screwdriver The key weight should move up and down freely Install the
145. pport wall Replacing the Enclosure Support Walls Left Enclosure Support Wall 1 Align the center screw holes of the three hole groupings in the left enclosure support wall with the thread marks in the extrusion 2 Install the four screws that secure the left enclosure support wall to the top enclosure Right Enclosure Support Wall 1 Align the center screw holes of the three hole groupings in the right enclosure support wall with the thread marks in the extrusion 2 Install the six screws that secure the right enclosure support wall to the top enclosure Removing the Connector Board 1 Follow the procedure described on page 4 8 to remove the right enclosure support wall 2 Following Steps 3 5 disconnect the cables listed in Table 4 2 Ref Name Cable Type Destination J301 PC2 Power stranded wire Engine Board J302 Audio flat ribbon Engine Board J303 MIDI CPU flat ribbon Engine Board J304 Front Panel flat ribbon Front Panel Board J305 Slider flat ribbon Slider Board J306 Treble flat ribbon Keyboard Assembly J307 Bass flat ribbon Keyboard Assembly J308 Wheels flat ribbon Mod Wheel Assembly Table 4 2 Connector Board cables 3 Disconnect the stranded wire cable from J301 on the Connector Board PC2 PC2X Disassembly Assembly Top Enclosure Remove the cable locking clips and disconnect the flat ribbon cables from 304 306 and J307 Be sure to set the cable loc
146. pter 4 PC2 PC2X Disassembly Assembly Introduction This chapter contains all the procedures for the disassembly and reassembly of both the 76 note PC2 and the 88 note PC2X as well as instruments with factory installed or after market options There are five main sections Opening the PC2 PC2X Top Enclosure PC2 Keyboard Assembly and PC2X Keyboard Assembly Warning If possible save all user programs and setups before disassembly For instructions refer to Saving User Data in Chapter 5 page 5 1 Notes Cautions Warnings Please pay special attention to all Notes Cautions and Warnings as they not only point out specific instructions but also alert you to differences between the 76 note PC2 keyboard and the 88 note PC2X keyboard Cables Connectors Flat Ribbon Cables flat ribbon cables with connectors are keyed and therefore cannot be reversed Most flat ribbon cables have locking cable clips Be sure to reapply the clips when connecting cables Some flat ribbon cables have exposed wires that insert directly into a wire trap connector When disconnecting and connecting these cables you must look for the marking on the edge of the cable denoting Pin 1 and be sure that you match it correctly with Pin 1 on the board Cable Routing In some cases tape secures cable connections or fastens cables to the bottom enclosure Always peel back the tape from one side when disconnecting cables so that the tape remains properly posit
147. result of a key test in this case striking the key C4 on the keyboard To exit the Scanner Tests and return to normal operation simultaneously press the Cancel and Enter buttons Front Panel Buttons To test a button press any front panel button An example of the expected test result for the Solo button follows Sola Alpha Wheel To test the Alpha Wheel turn it to increase or decrease the value by one The expected test result when the Alpha Wheel is turned is one of four values 0 1 2 or 3 3 Front Panel Sliders To test the front panel sliders move a slider to check its value at the bottom center and top An example of the normal test results for the Slider A follows your results may vary slightly Atbottom SLIDER 1 Atcenter SLIDER 1 125 Attop SLIDER 1 255 Troubleshooting Scanner Tests Wheels To test the pitch and mod wheels move the wheel up and down An example of the expected test results for the pitch wheel follows your results may vary slightly Atbottom PITCH WHEEL Atcenter PITCH WHEEL 128 Attop PITCH WHEEL 255 Keyboard To test the keyboard press any key The key name and number will be displayed twice in the LCD The first set of name and number is the test result for the front key contact switch and the second is for the rear switch An example of the expected test result for the Middle C key follows KEY C4 C4 Pressing h
148. ription PCB KEY CONTACT LOW Qty Reference Designation PCB KEY CONTACT HIGH KEY CONTACT STRIP 12 NOTE BRACKET ROD KEY WEIGHT SUPPORT 12 POS KEY PIVOT BRACKET ROD KEY WEIGHT SUPPORT 4 POS KEY NATURAL A KEY NATURAL B KEY NATURAL C KEY NATURAL D KEY NATURAL E KEY NATURAL F KEY NATURAL G KEY NATURAL LOW A KEY NATURAL HIGH C KEY SHARP KEY WEIGHT NATURAL KEY WEIGHT SHARP FELT RED AFTER TOUCH STRIP 6 12 PC2R Connector Board N01230004 Parts Lists PC2R Part No Description Qty Reference Designation RES TF 7 5KQ 5 1 8W 1206 1 R19 N041006503 CONN PWR JACK 4P W SHIELD UNITOP 1 J321 041021903 JACK PHONE TYPE TA PCMT 1 J300 N041025308 HEADER 156 SP 8P 09 65 2088 1 J301 N041030326 HEADER 1 SP DUAL ROW 26P 057 026 153 1 J304 N041031104 JACK 1 4 STEREO EPJ BBB P BELTON 2 J811 312 N041032305 CONN WIRE TRAP 2 00mm SP 5P 52147 0510 1 J302 N041032310 CONN WIRE TRAP 2 00mmSP 10P 52147 1010 1 J303 N041034010 HEADER 098 SP 10P 22 03 5105 1 J322 N041034031 CONN MIDI TRIPLE R A PCMT YKF51 5046 1 J320 N043010510 SWITCH SLIDER R A 2 5mmSP SPDT 1 1 N051064005 RES TF 569 5 1 16W 0603 T amp R 4 R98 96 99 102 N05106401 1 RES TF 1100 596 1 16W 0603 T a
149. s or MIDI Setups mode Knobs A D control parameters and settings In KB3 Mode Knobs A D control such functions as drawbar lengths etc Edit section Use the eight buttons and the Alpha Wheel in this section to select programs and setups and editing functions Turn the Alpha Wheel to scroll through menus and categories to select a program or parameter In Internal Voices and KB3 mode use the Left and Right cursor buttons to select bank and program ID parameters as well as some KB3 settings While editing use these buttons to make selections 1 7 Introduction PC2R 1 8 Edit Edit Store Group Menu Compare Copy Figure 1 10 Edit section Select the Edit Store button to enter the edit mode for the current performance mode to edit programs setups etc To save the changes press the Edit Store button again to enter the save dialog In a performance mode press the Group Menu button to select a category of programs or setups In edit mode press the Group Menu button to view the menu of parameters When editing the Compare button lets you hear the difference between an original and a modified setup or program The Copy button allows you to copy sections from one setup to another The Cancel No button exits an edit mode or answers no In a performance mode the Enter Yes button selects a program or setup and answers yes In an edit mode press Enter to enter menus for editing Modes section Use the buttons in this secti
150. side to free the cable Place the Mod Wheel Assembly in its position on the bottom enclosure Remove the cable locking clips and disconnect the flat ribbon cables from locations J306 Treble and J307 Bass on the Connector Board These cables are also secured to the bottom enclosure with nylon reinforced tape Peel back the tape from one side to free the cables Remove the Keyboard Assembly The keyboard is mounted onto a wooden spacer Sixteen screws secure the spacer to the keyboard Lay the Keyboard Assembly upside down on a flat protected surface and remove the 16 screws and remove the spacer You can now access the components of the Keyboard Assembly Replacing the PC2 Keyboard Assembly Note If you have disconnected the Bass and Treble ends of the flat ribbon cables from the keyboard contact boards during service be sure that you have reconnected them and reapplied the tape to secure the connectors Place the keyboard upside down on a flat protected surface and position the wooden spacer over the keyboard Install the 16 screws that secure the wooden spacer to the keyboard Place the Keyboard Assembly on the bottom enclosure Be sure that the flat ribbon cables from the keyboard are correctly positioned Connect the flat ribbon cables to the Connector Board and reapply the cable locking clips Be sure to reapply the nylon reinforced tape that secures the flat ribbon cable to the bottom enclosure Lift the Mod Wheel Ass
151. tact Board a ee ei be 4 24 Removihe ihe Bass Contact Boards Sur eso te bu AD LR es 4 24 Replacing the Base Contact Board ne a c 4 24 Removing the Keyboard Contact Strips aes uet etes e 4 25 Replacine the Key board Contact Stips ie 4 25 PC2X Keyboard Assembly 4 26 Removing the FC2X Keyboatd Assembly ence 4 26 Keyboard Assemb yagini ae 4 27 Removing Keys iced bie esee P tede esee etes ae lien i dee ti He HEEL Bas 4 27 Natural Wiek CR OR GER o Un boe Qt ote CUR Duo TURA 4 28 White Keys a 4 28 Sharp Keys rori ee ea ucro 4 29 Replacing a Keys bieten breed het nn dft tete Human lu 4 30 Servicing the Keyboard Contact BO ate 4 30 Removing th Treble Contact Board ne 4 30 PREP anes the Treble Contact DOGEL ae ee es reset 4 30 Removing the Base Contact Boat its un 4 30 R pl cine thie Pass Contact Board sent cedet ln 4 31 Removing the Keyboard Contact sp Se RE 4 31 Replacing the Rey boat Contact Strips s s eben eto lie 4 32 Removing eis eye ee elle 4 32 Replacing d Key Ole ee ee En 4 33 Chapter 5 Troubleshooting Introduction Aura arm o eene et erste OE esos 5 1 Cables GConnectots
152. tary Fast Slow Perc On Off Volume Decay Pitch Shift A B D B AN 16 AN 5 18 AN g AN Q Nw 223 Nu 2 ND 135 ND 108 Drawbar Toggle T Pre Amp Chorus Vib Chorus Vib Off Depth Figure 1 9 Power Volume Headphones and Performance section The top row of buttons are for use in each of the three performance modes The button LEDs are tri colored Red Green and Amber The function of a button depends on which performance mode is active and the LED color In the Internal Voices mode use these buttons to enter AutoSplit mode to add layers and splits In MIDI Setups mode use these buttons to solo a zone or select a zone for viewing or editing In KB3 mode these buttons control the effects for the current KB3 program Figure 1 9 is an enlargement of the Performance section An example of the operation of the Split button in each performance mode follows Internal Voices mode selecting the Split button switches to AutoSplit mode and adds a new sound below a preset split point MIDI Setups mode Zone 3 selecting the Split button selects Zone 3 KB3 mode Decay selecting the Split button switches between fast and slow decay for the percussion effect The bottom row includes the Shift button and Knobs A D The Shift button controls the operation of Knobs A D The Shift button LED is also tri colored green amber and red The function of Knobs A D depends on which performance mode is active and the LED color In Internal Voice
153. ted PC88 II ENGINE AUDIO CHANNEL MUTING CONTROL WV Filename P82RDV4 Date 9 19 2000 By D O NEILL Sht5 of 5 2200pF 5 NPO Ed 464 1 1 16W Kurzweil PC2 Series Service Manual PHASEA COMMON s PHASEB SW ROTARY J604 FRONT PANEL 45V DGND3 DGND2 _ 1 470uF 6 DGND1 PHASEB SENSE DRIVE COLA 2o oj oO12c m Qoo oocsowv o COLD COLC COLB ROW7 ROW6 ROWS ROW4 ROWS3 ROW2 ROW1 ROWO 298A1271 E 7 RED N a7 2SA1271 G X RED a4 D63 5558 A D43 SSSt11 RED D44 SSSt0 TL RED ZX 052 e SSSb10 RED D59 SSSb11 RED D67 _ C6 470uF 6V U3 74HC373 G D 1 Q 1 D 2 92 D 3 Q 3 DIA Q4 D 5 Q 5 0 6 6 EQ 32 2 E 3 2 3 2 3 2 D 7 Q 7 D 8 Q 8 U1 74HC541
154. teps 3 and 4 in Replacing the Top Enclosure If you have not completed these steps do so before continuing Refer to Figure 4 1 for the PC2 or Figure 4 2 for the PC2X Tilt the unit up and install the eight enclosure support wall screws Slide one side of the unit off of your work surface and hold the appropriate endcap in position Install the four endcap screws in the bottom enclosure Repeat for the other endcap Refer to Figure 4 3 Install the four endcap screws in the rear panel PC2 PC2X Disassembly Assembly Top Enclosure Top Enclosure The top enclosure includes five boards Connector Front Panel LCD Slider and Engine The Right and Left Enclosure Support Walls are also included on the top enclosure Figure 4 5 shows the placement of the enclosure support walls Figure 4 6 shows the placement of the boards Right Enclosure Support Wall Figure 4 5 Top enclosure enclosure support walls Engine Board Slider Board LCD Board Front Panel Board Connector Board Figure 4 6 Top enclosure board locations PC2 PC2X Disassembly Assembly Top Enclosure Removing the Enclosure Support Walls Left Enclosure Support Wall 1 Remove the four screws that secure the left enclosure support wall to the top enclosure and remove the left enclosure support wall Right Enclosure Support Wall 1 Remove the six screws that secure the right enclosure support wall to the top enclosure and remove the right enclosure su
155. ter button 3 Use the Left or Right cursor button to select the appropriate option for the card you are installing cand 1 card 2 4 Press the Enter button The LCD indicates Installirns as the presets transfer into Flash ROM Note If you are installing a second ROM option repeat Steps 3 and 4 5 Use the Left or Right cursor button to scroll to Hard Reset and press the Enter button 6 Select ea to hard reset the unit The unit now has the additional ROM option setups installed Troubleshooting Replacing the Battery Replacing the Battery The PC2 uses a flat three volt Lithium coincell battery When the battery voltage runs low the unit boots up with a low battery message 22 Note The battery voltage be checked at anytime using the Scanner Diagnostics See WG page 5 7 for more information PC2 Keyboard Models Accessing the Battery 1 Place the PC2 upside down on a flat protected surface 2 Remove the seven screws that secure the access panel and set it safely aside 3 Ifthe unit has Sound ROM options installed remove them Removing the Battery The battery CR2032 in the PC2 keyboard is mounted into a holder on the Engine Board and is accessible when the access panel is removed 1 Insert a flat plastic tool plastic knife pen cap etc into one of the openings between the battery and the holder to lift the battery Insert the tool here to lift the battery Insert the tool between lt
156. the contact strip on the keyboard contact board 7 Note Be sure that the deeper indentation is positioned toward the rear of the key a7 2 Line up the contact strip mounting pegs with their respective mounting holes on the keyboard contact board 3 Using a small blunt end tool Q Tip toothpick etc gently push the mounting pegs through the holes Do not use too much force or use a tool that can poke a hole through the mounting pegs However be sure that the mounting pegs are installed through the holes 4 25 PC2 PC2X Disassembly Assembly PC2X Keyboard Assembly PC2X Keyboard Assembly Removing the PC2X Keyboard Assembly The following procedure assumes that the PC2X is open and that you have followed the instructions to remove the top enclosure 1 The keyboard is secured to the bottom enclosure using ten screws Refer to Figure 4 16 for the position of the screws Arrows identify the locations of the ten screws 2 Tilt the PC2X up and remove the five keyboard rear screws then lay the PC2X flat on your work surface 3 Move the PC2X forward so that the front hangs over the edge of your work surface to access the remaining screws and remove the five keyboard front screws 4 Remove the four Mod Wheel screws and washers At this point the keyboard is loose in the bottom enclosure but it has cables connected to the Mod Wheel Assembly and the Connector Board Keyboard Keybo
157. the holder and the battery to ease the battery out of the holder Figure 5 1 Battery and holder 2 Ease the battery out of the holder If necessary insert the plastic tool at the bottom of the holder closest to the Engine Board to remove the battery Installing the Battery 1 Position the battery over the holder so that the positive terminal is pointing to the Engine Board 2 Slide the battery into the holder and apply slight pressure until it snaps into place 3 Ifthe unit has Sound ROM options install them 4 Install the seven screws to secure the access panel Troubleshooting Replacing the Battery PC2R Rack Models Accessing the Battery 1 2 3 Remove the seven screws that secure the top cover Slide the top cover back from the Front Panel Assembly to release the top cover from the bottom enclosure and place the top cover safely aside to avoid damage If the unit has Sound ROM options installed remove them Removing the Battery The battery CR2032 in the PC2 keyboard is mounted into a holder on the Engine Board and is accessible when the access panel is removed 1 Refer to Figure 5 1 Insert a flat plastic tool plastic knife pen cap etc into one of the openings between the battery and the holder to lift the battery Ease the battery out of the holder If necessary insert the plastic tool at the bottom of the holder closest to the Engine Board to remove the battery Installing the
158. the unit has Sound ROM options be sure to install them on the new board Follow the procedure described on page 4 8 to install the left enclosure support wall Removing the Slider Board 1 2 Follow the procedure described on page 4 8 to remove the left enclosure support wall If the unit you are servicing has a PCX 1 Board installed follow the procedure on page 4 13 to remove it The flat ribbon cables connected to J101 and J102 use wire trap connectors The shielding has been removed from the end of these cables to expose the wires The wires are inserted directly into these connectors Lift up the sides of each connector This unlocks the trap to free the cable wires Gently pull each cable up out of the connector Note the marking red or black on each cable that indicates the connection to Pin 1 you ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Slider Board Two of the screws that secure the left enclosure support wall also secure the front panel edge of the Slider Board You have already removed the enclosure support wall but one screw remains securing this edge of the board See Figure 4 9 and remove the remaining screw PC board clamp and screws oGo ede Front panel edge screw Figure 4 9 Slider Board screw locations Remove the two screws that secure the PC board clamp and rear panel edge of the Slider Board to the top enclosur
159. to the keyboard chassis and remove the Treble Contact Board Replacing the Treble Contact Board 1 Position the Treble Contact Board on the keyboard chassis Be sure that the rubber key contacts line up properly through the holes in the keyboard chassis Install the 26 screws that secure the board to the keyboard chassis Connect the small ribbon cable that connects the Treble to the Bass Contact Board Connect the flat ribbon cable that connects the Treble Contact Board to the Connector Board Be sure to reapply the tape to secure the connector Removing the Bass Contact Board 1 4 30 Disconnect the flat ribbon cable that connects the Bass Contact Board to the Connector Board The connector is secured with tape Peel back the tape to free the cable Disconnect the small ribbon cable that connects the Bass and Treble Contact Boards Remove the 22 screws that secure the board to the keyboard chassis and remove the Bass Contact Board PC2 PC2X Disassembly Assembly PC2X Keyboard Assembly Replacing the Bass Contact Board 1 Position the Bass Contact Board on the keyboard chassis Be sure that the rubber key contacts line up properly through the holes in the keyboard chassis Install the 22 screws that secure the board to the keyboard chassis Connect the small ribbon cable that connects the Bass to the Treble Contact Board Connect the flat ribbon cable that connects the Bass Contact Board to the Connector Board Be s
160. ure to reapply the tape to secure the connector dou the Keyboard Contact Strips Key spring location Place the keyboard upside down on a flat soft surface Be sure that the keys are resting on a soft surface to avoid scratching or other damage Follow the procedure to remove the Bass and Treble Keyboard Contact Boards Examine the keyboard contact strips and look at the design of an individual contact The top portion of the contact has two indentations One indentation is deeper than the other When replacing the keyboard contact strips the deeper indentation is always positioned toward the rear of the key The keyboard contact strips have mounting pegs that secure the contact strips to the keyboard contact boards To remove a keyboard contact strip gently lift and free the strip from its position Be careful not to rip or damage any contact in the process Pivot Ni location p s gt Front of key a 4 Strikes the front and rear key contact on key depression PC board 4 lt side view Mounting pegs 2 Key contacts top view Deeper contact to back Figure 4 20 Side view of the natural white key 88 note keyboard 4 31 PC2 PC2X Disassembly Assembly PC2X Keyboard Assembly Replacing the Keyboard Contact Strips 1 Position the contact strip on the Keyboard Contact Board that you are servicing Note Be sure that the deeper indentat
161. xpansion Board PCX 1 There are two cables routed underneath the PCX 1 Board a flat ribbon cable from the LCD to the Engine Board and a stranded wire cable from the Headphone Volume Power Switch Board to the Connector Board Before you replace the PCX 1 Board be certain that these cables are properly positioned 1 Place the PCX 1 Board over the four standoffs This should properly position the 24 pin connector over the 24 pin header on the Engine Board 2 Press the PCX 1 Board down securing the 24 pin connector and snapping the board onto the standoffs 2 Note If you are installing new 1 Board check the old board for Sound ROM LA options If the unit has Sound ROM options be sure to install them on the new board 3 Install the two screws that secure the PCX 1 Board to the bottom enclosure PC2R Disassembly Assembly Opening the PC2R Removing the Engine Board 1 If the PC2R you are servicing has a PCX 1 Board installed remove it following the procedure described on page 3 5 2 Following Steps 3 6 disconnect the cables listed in Table 3 2 Ref Name Cable Type Destination 304 Front Panel flatribbon Right Front Panel to Connector J402 PC2 Power stranded wire Connector Board J403 MIDI CPU flat ribbon Connector Board J405 Backlight stranded wire LCD Board J406 LCD flat ribbon LCD Board J412 PC2 Audio Out flat ribbon Connector Board Table 3 2 Engine Board cab

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