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SERVICE MANUAL

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1. U es 7 7 K IXTONE 232 02311 3601 jii P601 RY 75503 EXPRESSION PEDAL MULT mare BRILLIAN J708 P708 331 GATE amp PERCUSSION AMP BOARD 219 04312 PW 271B 1 MAIN BOARD 218 02311 2 EXT SPEAKER OUTPUT NEON P L 308 02006 3300 1 MAIN AMP UNIT 105 09206 i i FO 2001 SUPPLY H T Pow L T P10 102 43 105 09302 2 8 _0 0 PLUG EXPRESSION PEDAL SPS CKET MULTI CONNETOR K 2 LINE OUT 20 30 R lt EXT INPUT p8021 FUSE Bd PBOI SJBOT 4802 SE Ba 224 14341 04712 250 Fo ns 3 BEI aal 22 2805 P804 E 4000006 KI 10K P101 43 1 BRILLIANCE 550 LED PL 9 PLUME 8 Ebo UNIT EJ POWER SWITCH AC 120V LOGIC DIAGRAM 2 105 09301 M t 4 1 sra 850 Salsa lt S99 650 140 ya 172 zza v6 u 763 992 6212 012 veo 854 852 282 908 9019 Oti 792 ls scu seo 654 652
2. BE gd my WE anat EL U EA I RESISTORS 560 R13 thru 24 1000 R37 thru 48 61 thru 72 10K R1 thru 12 22K R25 thru 36 49 thru 60 47K R73 thru 84 86 thru 88 94 97 thru 133 135 137 thru 141 143 144 151 thru 156 162 167 168 56K R85 89 thru 93 95 96 134 136 142 166 ii gee lal LLL RE x 32219 1 A A LA d TE SEN FIGURE 3 3 DV 4B 229 20316 DIVIDER BOARD LAY OUT 3 4 ee WIE W lt lt ei gt ace 2 24 SBE pee Got n n 1 teu out zza I vea HOH vu Spa 1 ved LEH 888 852 280 vs A e a x T 9 8 2 210 velo rza sea sva 094 2 4 O W r J401 s 01017 152473 306 01005 151555 101 THROUGH 1012 319 01007 5824 2 UNLESS OTHERWISE SPECIFIED SYMBOL DENOTES NUMBERS IN TERMINAL SYMBOL DENOTES NUMBERS IN PLUG 8 ALL RESISTORS ARE IN OHMS 5 1 AWATT ALL CAPACITORS ARE MICROFARADS AND THROUGH C170 ARE USED MYLAR TYPE 10 CURCUITS OF EACH NOTES ARE ALL SIMILARLY 4 NOTE THROUGH E N
3. Figure 5 sasa mass TDv alci DIVIDER GEN BOARD X5 PEDAL amp PEDAL TO LOWER MANUAL LOGIC DIAGRAM LOWER MANUAL KEY ASSY AK 649AI lt TS Soles 2502 iA OOP 1502 5006 wl ern MI BASS GEN BOARD ice 223 35386 EJET 2 00 PEDAL KEY ASSY PK 3D1 ales tn d esos 1 7 04 el 5 BASS GENERATOR BOARD FUNCTIONAL BLOCK DIAGRAM FOR PEDALS AND PEDALS TO INVERTED 3 BIT NOTE 3 BIT NOTE PRIORITY ENCODER STAGE SELECT CODE SELECT CODE DIODE LADDER MATRIX SELECTED LOGIC 1 KEYING INPUT PRIORITY FROM 13 SELECT PEDALS OR KEYING INPUTS 20 LOWER MANUAL KEYS 1503 1504 AND 1505 Oy ACTIVE HIGH SELECT My ACTIVE LOW 2 BIT INHIBIT ENABLE CODE INVERTED 2 BIT INHIBIT ENABLE ICS 1 2 83 Ics 7 10 CODE 01 202 e RC MUTE ENVELOPE GATES FILTER NAND Q7 08 09 10 14 03 ENVELOPE GENERATOR STRING BASS Quee i GA KEY DOWN DATA BUSS OV KEYS DOWN 14 KEYS UP BASS SELECT DATA 8055 5 BASS GENERATOR BOARD BLOCK DIAGRAM FOR PEDALS AND PEDALS TO LOWER MANUAL INVERTED 3 BIT NOTE SELECT CODE REINVERTED 3 BIT NOTE SELECT CODE 1501 1502 1503 20 BASS FREQUEN
4. 1012 x 1 uel e 5D 2 8 6 AT 1446 1692 1 gt LQ 4 NOTES SYMBOL DENOTES NUMBERS IN TERMINAL SYMBOL DENOTES NUMBERS IN PLUG HROUGH C170 ARE USED MYLAR TYPE 10 4 C NOTE THROUGH E NOTE ARE 6STAGES AND 101 THROUGH 1012 319 01007 5824 ALL RESISTORS ARE IN OHMS t5 1 4WATT ALL CAPACITORS ARE IN MICROFARADS AND 1 O2THROUGH 074 306 01017 152473 or 306 01005 151555 2 UNLESS OTHERWISE SPECIFIED 30 NOTE THROUGH B NOTE ARE 7STAGES CURCUITS OF EACH NOTES ARE ALL SIMILARLY DIVIDER GENERATOR BOARD DV 4 C 229 20318 1 1 3413 3 1 848 1619 D ue 1 iea S end i 1664 zu 1 27 284 I ae 5 poro us 1 980 1 l 9 ssa L FII fea L4 iza lea O sya 1 1 1 94 zsa 1 1829 oy ac 828 oru Ecke ra I 51 TE 2 m gt sco DIVIDER GENERATOR BOARD SCHMATIC AND LAYOUT 51 229 20318 229 20218 EM NONE R43 470 R42 RAS 14 1507 5600 1
5. OUTPUT MANUAL COM 8 PEDAL 7 14v 5 STRING BASS DECAY MUTE 8 BASS 16 4506 NOTES 1 D THROUGH 026 THROUGH DAG _ THROUGH Q3 05THROUGH 09 9 01 0204 1 1C1 THROUGH IC3 1C4 THROUGH 1 IC8 THROUGH 1 14 1815 44 10 8 em 100K 825 7 09 047 09 4505 8 D17 Y 016 R7 SN 33K 27 R23 RB 33K Rao R39 C5 sek R29 R28 68 68K R372 R38 R27 56K 56K 100K 1 caa 1613 sip 8 or GN 020 019 R13 100K os 306 01017 1S2473 306 01027 DAN 4 IDIODE ARRAYI 320 97004 8 33u IRESISTOR ARRAYI 305 01008 25 7330 305 03040 25 9450 305 03023 2SC1000GR 319 09001 14532 PRIORITY ENCODER 319 10001 14512 8 Ch DATA SELECTOR 319 06007 MC14025CPITRI PLE NOR GATE 319 06006 MC14011CP QUAD NAND GATE 319 03004 MC14013CPIDUAL D FLIP FLOP 2 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN 5 1 4 WATT ALL CAPACITORS ARE IN MICROFARADS AND C14 ARE USED WITH TANTALUM 210 SYMBOL DENOTES NUMBERS IN PLUG D 3Y L 1000P T 031 14 GND MANUAL B As MANUAL amp PEDAL KEYING INPUT 1 4504 4500 Z EEN O Q 018 DAS TMS 1 EE II H mm a Eo GS 0
6. Depress Tab Adjust Oscilloscope Step Test amp Test Point Extend Tone Bar Play Keys or Other ind Fig c Lower Man Tone Bar 8 Tone Bar 2 9v rms 4 2 3v rms 2 2 3 2 0v rms 2 22v rms 1 3 5 9 22v rms 1 1 3 2 1v rms v 2 4v rms Pedal 5 a I Pedal Decay Time Pedal Tab 8 amp Pedal Key Cof Pot 2 on 1 5 sec 2 Across Speaker String Bass I amp High Note SB 5 B Bd II Tab to String Bass Tab 150 msec to OFF 2 15 msec String Bass Tab 400 msec I to ON 40 msec String Bass Tab 800 msec II to 80 msec b H Pedal Level Pedal Tone Bar Pedal Key C of Pot 3 4v rms Across Speaker to8 High Note SB 5 B Pedal Tab to 8 Pedal Key G 4 5 0 rms Pedal Key C of 5 4 0 rms Low Note Pedal Tone Bar Pedal Key C of 2 3v 0 rms to8 High Note Pedal Tab to 8 Mute Tab to ON Extent of Expression Pedal 6 a Across Speaker Full Tibias Tab Mid Key Con Level 2048 to Up Man 24dB when Exp Pedal MAX to MIN Level is OdB at Exp Pedal MAX Noise Level 7 a Across Speaker Tab s to ON 5 mv rms MAX Except Reverb Tab amp Mute Tab All Tone Bars to 8 All Tab s to OFF Mid Key 10 mv rms MAX All Tone Bars to on Up Man O OFF and amp Low Man Percussion Tab s to ON No noise occurs NOTE During Test Procedur
7. 15 9 GND PRE AMPLIFIER HEAT SINK m 341 06004 2 27 GENERATER 3 GND AC27V AC27V COM 224 14316 224 14216 NOTES 101 306 01023 1B2C1 06 337 06017 RD20 EF D2 306 01024 15271 03 04 337 06013 RDI5EC 05 337 06015 RD27EB 01 305 04005 280234 02 03 305 01013 2SA490Y 2 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN 0 5 10 1 2 WATT ALL CAPACITORS ARE IN MICROFARADS 3 SYMBOL DENOTS NUMBERS IN TERMINALS 4 POWER SUPPLY BOARD 5 17 224 14216 220 k ul 4 C4 R3 220 T ISK R5 1800 5600 CIS 825 1800247 35 680K 319 01005 239 319 01006 1 LEM RI2 A tame 7 jjs 1000 A PF 52 33004 L OKS cis 2 SN T 100 25 082 28 Spey 68K 420107 2 me RI7 YRI 82 GND Bi 1000 1200K 100KQ50 228 19312 4220 0 0 228 19212 NOTES 101 308 05001 152206 THROVGH 305 03063 ZSCICTY 02 03 306 01017 152473 04 337 06014 RD 5 6EB P302 i9 C 15 Cx 4 B 3 2 D 6 06 8 8 F E 5 0 5 D Oc 3 21v EO GND D 9 Q4QZTHROUGH 06 305 03040 2589450 9 2 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN OHMS X57 1 4WATT ALL CAPACITORS ARE IN MICROFARADS 3 SYMBOL DENOTES NUMBERS IN PLUG M D D GENERATOR BOARD M6 4 B 228 19212 TEST AND ADJUSTMENT PROCEDURES 5 18150 WITH
8. POWER SUPPLY PS 17 224 14216 5 8 gt 5 u z 5 a AC POWER CABLE MAIN a DIN SOCKET 5P FUSE BD POWER SUPPLY PS 17 224 14216 AC SOCKET JACK d x Tov JACK 318 04001 TRANSFORMER 156 7615 307 01078 E 06UL 20V 56 7615 307 01077 E 06 1007 FOP VIEW TOPVIEW 307 01078 E 07UL 120v NOTE NOTE 8 Socket 317 01015 14128 a DIN Socket 303 14001 AC Socket 30309008 3 AC Power Cable 43901008 Main Amp b Power Supply Cord 438 08001 100V only b Power Supply Cord 439 02002 100V only Power Supply Cord 43802021 120 only Power Supply Cord 439 0104 120V only C Fuse Board Assy 224 14241 PS 23A C Fuse Board Assy 224 14241 PS 23A 120V Fuse Board Assy 224 14243 PS 23C 100V CHANGE SERIAL 589442 Up 100V AREA SERIALNO 585539 Up 120V AREA 105 09205 100V MAIN AMP ASSY 10509208 120 JACK 318 04001 56 7615 NEON LAMP 308 02006 5595 b CIRCUIT BREAKER 1A 105 09229 100V MAIN AMP ASST 105 09230 1209 b CIRCUIT BREAKER 1A NEON LAMP 308 02006 SOCKET 317 01015 P 5595 1412 8 la DIN SOCKET a CABLE ASSY Q SOCKET 9P 317 01015 a AC SOCKET 3P CM 3 JACK 318 04001 14128 56 7615 FRONT VIEW FRONT VIEW NOTE NOTE a Cable Assy Q 105 0741
9. 1 Change the Tab Switch Vibrato 11 Circuit in the Lower L H End Block Assy See FIGURE 3 2 Take off the blue wires from P901 6 to wire end Soldered to Vibrato tab switch and from J901 6 to 202 3 3 Locate P201 plug Remove the wires from Pin 1 27V DC and Pin 2 14V DC And insert Pin 1 with blue wire into P201 2 Pin 2 with green wire into P201 1 4 Connect P201 P202 P203 and P301 Plugs to MG 14A FIGURE 2 MG 228 19237 CONNECTION FROM POWER 10 CA BO FIGURE 1 4 9 228 38242 amp MG AD 228 9214 CONNECTION L ro niren CONTROL POT xo DIVIDER BP F 00090900090000099 1301 DEM DIRECT CONNECTION TO TAB SWITCH VIBRATO VIBRATO I TABSWITCH VIBRATO FIGURE 3 cao CHANGED TAB SWITCH CIRCUIT 4 Mu SACK SIDE View P202 SUPPLY 8D FAST CONTROL POT LESLIE LESLIE ED 2 VIBRATO VIBRATO sisi FROM MG 14A 1008 1 4W LOWER L H BLOCK ASSY 1009219 2 FIGURE 3 7 3 8 ADD 3 M D D GENERATOR BOARD MG 14A 228 19337 CONVERSION PROCEDURE 3 8A 3 9A ADD 3 25260 901 Adds 18260 501 5 05260 SOL ATddnS 62260 901 ATddnS ASSY NIVW G vOLLO LOE 5 Ove 022 62010 LOE 1080 3 4405 89010 ZOE 90 3 14405 H3WHOJSNVHL v
10. 3 439 01011 to Main Amp 240V only 439 01009 to Main Amp 220 only AC Power Cable AC Power Cable MAIN AMP ASSY 105 09207 230 e Power Supply Cord 439 01006 220V only Power Supply Cord 439 01005 240V only CHANGE SERIAL NO 01800 Up 10509231 220 105 09232 240 b CIRCUIT BREAKER 1A MB 1 JACK 318 04001 14128 NEON LAMP 31802006 P 5595 56 7615 SOCKET 317 01015 MAIN ASSY NEON LAMP 308 02006 5595 DIN SOCKET 5P JACK 318 04001 SG 7615 b FUSE PS 34 AC SOCKET 3P SOCKET 9P 317 01015 L la CABLE ASSY Q 3 1412 8 FRONT VIEW IFRONT VIEWI NOTE NOTE Cable Assy Q 10507415 a DIN Socket 5P 303 14001 Socket 30209005 3 DIN Cord 44001002 b Circuit Breaker 1A 30202000 15 b Fuse Boad Assy 22415211 5 34 c Transformer 230V 30701068 05 c Transformer 220V 240V 307 01104 CHANGE SERIAL NO 01800 Up 4 7 ADD 2 Ths peb Layout very NOTES MDD GENERATOR BOARD 31901014 550240 01 02 30503063 2SCIB 5LorK M ada 228 19337 30605002 177 310 228 19237 02 33706022 C2 C3 31119003 THERMAL COMPENSATOR CAPAC Pa 311 05005 POLYSTYRENE FILM CAPAC FIGURE 3 7 3 8 ADD 1 2 UNLESS OTHERWISE SPECIFIED ALL
11. Test Point Low Man Tone Middle Key C on Pot VR2 on 2v 3 R 43 amp on PA 56 Bar 8 to 8 Lower Manual PA 56 Board Board b Test Point Reverb I amp II Mid Key C Pot VR4 on About 70 mv amp 8 Reverb Tab amp Ear Tab to ON E amp Gon PA 56 Board Decay Low Man Time 2 5 3 sec c Balance Ear Pot VR3 on Same Level on PA 56 Board Reverb OFF from I amp II to ON 2 6 Step Test amp Test Point Depress Tab or Extend Tone Bar Play Keys Adjust Oscilloscope or Other Ind 12 a 12 a 13 a 14 15 Other Operation Leslie Socket Pin 7 Pon 6 amp 1 Leslie ON OFF to Leslie Slow Fast to Fast Leslie ON OFF to OFF Ensemble Tab to Lower Man Tone Bar sets to 8666444 String Tab to ON Upper Man Tone Bar sets to 008888666 Full Tibias Tab to ON do sets 806808006 Theater Brass Tab to do sets 848868666 Test of Mechanism Operation a Confirm that Tone Bars are easy to operate and that one Tone Bar doesn t disturb other Tone Bar operation and that Mark 8 is visible b Confirm that Keyboards are operational c Confirm that Expression Pedal is normal to operate and to stop at will d Confirm that position of Knob Mark is normal e Confirm that Pedal Keys are normal to operate f Confirm that Tab s are normal to operate Assembly Note
12. 2 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN OHMS 5 1 4WATT SYMBOL DENDTES NUMBERS IN PLUG CAPACITORS ARE IN MICROFARADS The LC oscillator is comprised of L D1 C1 C2 C3 R3 and 01 and is a Colpitts type 03 a varicap diode is used to vary the oscillator s frequency for vibrato and tuning control As the voltage at the junction of R2 C1 an D1 becomes more negative the capacitance of the varicap diode increases and the oscillator frequency decreases Since the cathode of the varicap is normally with no vibrato at ground potential and the anode is held at 5 6V by D4 and R1 the capacitance of the varicap remains constant and stability of the oscillator is maintained Capacitor C1 is used to isolate the D C bias on the varicap from the tank circuit L1 with C3 C4 C1 and the varicap diode oscillator at 4 0048 MHz R4 and R5 supply a bias voltage for Q1 The oscillator signal is coupled through C5 to buffer amplifier Q2 which drives 1 1 MDD Gent LC 1 a si input sign the driven by this LC is by C7 1 2 and 1 2 gen Cx and 1 0 3 doe buffer 03 signal for i 2485 319 03001 07319 03002 2 319 01005 B2 GND 81 30373 509450 54 1 4WATT ARADS IN PLUG MDD Generator 1 C 1 a signal divider It is used to insure a square input signal with a 50 per cent duty cycle to drive the MDD
13. SERVICE MANUAL dki kak kika 4 4 HAMMOND X 5 COMBO ORGAN The Hammond X 5 is the first truly portable organ that embodies all the traditional capabilities of Hammond tonebar organs It s a synthesis organ that allows you to create your own sound It s easy to set up compact and weighs only 165 Ibs Two 44 note keyboards with overhang keys 13 note pedalboard Nine harmonic tonebars for upper keyboard Seven harmonic tonebars for lower keyboard One 16 harmonic tonebar for bass Vibrato 3 degrees and off Reverberation 3 degrees and off 4 presets plus upper and lower tonebar positions Synthesis touch response percussion Fast and Slow Decay Variable speed repeat reiteration on percussive voices Acoustic tremolo speaker outlet Leslie 910 plus two speed on off control tabs 16 and 8 pedal tab Two String Bass tabs 3 decay times plus Mute Brilliance Knob continually variable Volume control knob Input jack for external instruments Line out jack for other amplifiers External speaker jack 9 0 0 0 0 0 9 SPECIFICATIONS Weight 165 Ibs e Power Source 60 cycle AC 120 V e Dimensions 44 W 36 H 25 D Accessories Legs 3 5M PRODUCT SERVICE For product service contact nearest authorized Hammond Service Center or write to Manager Product Service Hammond Organ Company 4200 West Diversey Avenue
14. and 16 by Pedal Tab The Mute Tab affects all Bass Tones VIBRATO A Master Oscillator Vibrato offers three 3 widths at one speed that affects all voices This rate is 6 6 0 2 Hertz Vibrato is wider than I and the two Tabs are additive so the Vibrato is widest when both on VOLUME This Knob controls the overall volume of the organ soft to loud and its variable range is about 30 dB BRILLIANCE This Knob controls the overall tone of the organ soft to bright then gradually attains a slope of 6 dB octave and alters the response about 16 dB at 3000 Hz 1 13 1 14 1 15 1 16 1 17 EXPRESSION PEDAL The assembly is made of steel frame utilizing a single channel The variable range is about 22 dB at minimum Position REVERBERATION Three 3 degrees of Reverb are available which affects all organ tones EXT INPUT An input suitable for other Signal generating devices is provided and located under the right hand Lower End Block of the cabinet REMOTE TONE CABINET A jack is provided suitable for an 8 ohm Speaker A socket is provided suitable for a Leslie 910 Tone Cabinet The signals are taken from the organ output following the Leslie Selector Tabs and On Off Fast Slow control Tabs are coupled through the Standard Cable to the Tone Cabinet Jack and socket are located on amplifier in the Pedal Cabinet AMPLIFIER A single channel 30 Watt Block Module Design is provided and located in the P
15. levels to the gating inputs IC12 pins 5 1 or 13 Also with lower manual key 920 activated the keydown data buss rises to logic 1 grd level and the bass select buss R remains at logic 0 14V This combination of inputs at NAND gate ICI3D forces flip flop 1C13A 13B to hold a logic 0 14V level at its pin 3 output and a logic 1 grd level at its pin 4 output The pin 3 output of logic 0 14V holds ICI2B in a disabled mode and the pin 4 output holds IC12D operational Also because the bass to lower tab is actuated transistor Q6 receives 14V at its base input This potential turns Q6 on which allows pin 1 of ICI2A to maintain a logic 1 grd level Conse quently IC12A passes the medium bass signal gate The result of holding lower manual key 20 down when the bass to lower coupler is on is the passing of the medium and high bass C tones from the bass select gates of IC12 to the envelope gates of ICI4 At this point the system processes the signal in the normal fashion NOTE 20 lower manual keys utilize only the medium and high bass outputs of IC12A and ICI2D NOTE All 20 lower manual keys utilize only the medium and high bass outputs of IC12A and ICI2D I PEDALS gt LOW OCTAVE BASS 5 NOTES 1 LOWER MANUAL KEYS 13 KEYS 16 TAB 1 l 13 KEYS 1 PEDALS 13 KEYS 8 1 MED
16. as bly The heart of the X 5 Bass System is the Bass Generator Board 223 35386 This board contains 10 basic sections These sections are 1 A diode ladder matrix 2 A priority encoder stage 3 inverter NOR gate stage 4 A latch stage 5 A channel data selector stage Multiplexer 6 A divider stage 7 Octave select gates 8 Envelope gates 9 A Mute filter 10 An amplifier stage Thesc TI stages interact to provide all the features that are associated with bass on the 5 Figure 2 in the back of this booklet demonstrates how these basic stages fit together in a functional block diagram Notice in Figure 2 that the keying inputs from the pedals or lower manual are applied to 7503 1504 and 2505 and the diode matrix The selected keying inputs are logic 1 ground levels which are received by the matrix and are sent to the appropriate data D1 D7 inputs of the priority encoder stage ICs 1 2 and 3 The priority encoder ICs encode the 3 highest priority input D7 DO to a 3 bit This code is released at the Q2 Q1 and Q0 outputs The encoders also release inhibit enable information at their Gs outputs This inhibit enable information is used to disable or enable the data selector ICs later on in the keying process Both the note select code and the inhibit enable code are sent to the inverter stages of IC7 and transistors 01 02 respectively The NOR gates within IC 7 invert the note sel
17. at its pin 4 and pin 0 14V at its pin 3 The two outputs of the flip flop combine with the inputs of the 16 8 tab to allow the medium bass G frequency and the high bass G frequen cy to pass through 1 12 and ICI2D to enter the envelope gates of 1 14 and 1 14 12120 directly receives the logic 1 grd gating input at pin 13 from IC12A receives a logic 1 grd at its gating input pin 1 from conducting transistor Q6 ICI2B is inhibited be cause the logic 0 14V from pin 3 of 1C13A overrides the logic 1 grd from transistor 05 Refer to schematic of the Bass Generator Board After the medium and high bass signals reach the envelope NAND gates of 1 14 the signals undergo the same process that was explained in example n EXAMPLE 3 MODE 3 Assuming that pedal 2 is depressed and the 16 8 stop is set for 8 the following operation occurs The note selection process of the C bass tone from data selector ICS is accomplished in exactly the same manner as that described in example 1 Likewise the CH low medium and high bass tones are made available at 1C12 at its respective B A and D selections But with the 16 8 tab set for the 8 mode the octave select gates of IC13 transistor Q5 and transistor Q6 enable the medium and high bass gates 1 12 and 12120 and disable the low bass gate IC12B Because both the keydown data buss S and the bass select data buss R are held to logi
18. packages This divider 1 may be driven by the vibratoable oscillator The 5V for this 1 is generated by D4 and R11 and bypassed by C7 2 and 3 are the two frequency generators 2 generates frequencies of Note through and 3 does Note through 1 drives buffer O3 supplying an 11V 2 00024 MHz clock signal for the MDD packages Three power supplies 11V 14V and 27V are required for the operation of the two MDD packages 14V and 27V are supplied from the organ power supply PS 5 B R12 and R13 form a voltage divider between ground and 14V to generate the 11V supply Each of the three supplies is protected from static discharge by a capacitor C8 10 11 12 FIGURE 3 11 MDD GENERATOR TWO PACKAGE 228 19312 LAYOUT amp THEORY eee 114 GND C MV B Lu D NOTES 1 DITHROUGH 011 306 01017 152473 012 337 02005 022 12A Q1THROUGH 012 305 03040 2509450 2 UNLESS OTHERWISE SPECIFIED L RESISTORS ARE IN OHMS 57 1 4WATT SYMBOL DENOTES PIN NUMBERS IN PLUG EF 12 223 MDD BUFF This board Board on approximati There are 17 are O1 thro are Q12 is coi connector Generator pin 16 but forms are r duty cycle These inpu RIO 700 22 R 2200 10K DIO 52473 22 12 509450 5 1 4WATT IBERS
19. 03060 443 4 14 Power Supply Board PS 5 B 224 05311 Diode Diode Diode Zener 6V Transistor PNP Transistor PNP Transistor NPN Transistor NPN Heat Sink Heat Sink Screw Nut Fiber Tube Pre amp Reverb Amp Board PA 56 219 51306 Transistor PNP Transistor NPN Transistor PNP Transistor NPN Integrated Circuit Pot Trim 10K Pot Trim 50 Main Amplifier Board PW 27 B 218 02311 Diode Diode Zener 15V Transistor PNP Transistor NPN Transistor NPN Integrated Circuit Pot Trim 5K 0 1 7 8 0 2 Through 6 0 10 0 9 1 1 VR 3 VR 2 VR 1 D 3 4 D 1 2 0 3 0 1 0 2 IC 1 VR 1 306 01023 306 01024 337 02001 305 01008 305 01013 305 03040 305 03027 341 06003 341 06004 323 17019 323 04003 505 03023 305 01006 305 03023 305 01014 305 03041 319 23001 336 01006 336 01010 336 01009 306 01017 337 06013 305 02010 305 03040 305 04012 319 23001 336 01005 AEW 5 BASS SYSTEM PEDALS amp BASS TO LOWER MANUAL INTRODUCTION The new X 5 Bass System supplies bass tones for 13 pedals at both 16 and 8 pitches as well as bass tones for twenty lower manual keys Figure 1 shows the relative ranges of bass tones employed by the lower manual and pedals In manual bass the system operates in a low select manner because of the action of 3 priority encoder ICs In pedal bass mode the system operates high select because of the wiring of the pedal
20. Also at this time the Gs output of IC2 rises from a logic 0 14V to a logic 1 grd The Gs output is supplied to the input of transistor Q1 Finally with a logic 1 grd applied to the 07 input IC2 releases the note select code of 1 1 1 from its Q2 Q1 and Q0 outputs These outputs exist on pins 6 7 and 9 respectively After the Gs output of IC2 is inverted to a logic 0 14V by transistor Q1 the signal works with the inverted Gs output of IC3 logic 1 at transistor Q2 s output to form the 2 bit inhibit enable code The 2 bit code activates two latches with ICs 9 and 10 The logic 0 14V the output of transistor Q1 combines with the logic 1 grd of the keydown data buss S at gate 1 100 the logic 0 14V also travels to the input pin 6 of IC9A one half of a latch consisting of IC9A and IC9B The logic 1 grd and logic 0 14V inputs to 1 10 force a logic 1 output at pin 11 of 1C10D Now with a logic 0 14V applied to pin 1 of IC9A and a logic 1 applied to pin 6 of IC9B the latch forces a logic 0 14V to pin 4 of IC9B This logic 0 14V travels to the disable input D1 pin 15 of data selector ICS With logic 0 14V maintained at the D1 input of the ICS the chip becomes enabled and therefore available for operation The logic 0 14V at IC9B pin 4 is also applied to pin 2 At ICI1A the logic 0 14V combines with the output of IC10B pin 4 To det
21. BOARD 1229 20318 PARERE O O 41 1 NN M DD BOARD 228 19312 LC MASTER OSICILLATOR IMIBRATO viaRATO 1009 24 z BASS GEN BOARD n 223 35386 h D P507 J507 RC FILTER amp MUTE 07 08 09 STRING 5596 15541 P506 P505 LOGIC DIAGRAM NO 1 105 09301 3 THRU 15 Ted nal ara THRU it ENOTE THRU ICS THRU B NOTE THRU i UPPER MANUAL KEY ASSY AK 540D 12 i 1 r oro dog u 24 T E I NE 1 Ki M f 4 H 3 1 AL 4 WW d D n p de 9 vg m s t J r t nar t4 I edi E A T i th EE 1 77 4 M H 11 U n n 1 1 wa it i Ju S 5 ry N go 407 THRUJ412 17 O PEDAL KEY 55 301
22. Chicago Illinois 60639 Parts are also Available by Contacting Product Service as Mentioned Above IMPORTANT Always supply model designation and serial number when writing gt TABLE OF CONTENTS SECTION I HOW THE ORGAN OPERATES 14 GENERAL 14 1 2 1 1 1 3 SOURCE 14 14 MANUAL 14 1 5 5 14 1 6 VOICING 1 1 1 7 PERCUSSION 14 1 8 14 1 9 PEDALS 12 1 10 VIBRATO 12 1 11 VOLUME 1 2 1 12 BRILLIANCE 12 1 13 EXPRESSION PEDAL 12 1 14 REVERBERATION 12 1 15 EXTERNAL 1 2 1 16 1 2 1 57 AMPLIFIER 1 2 SECTION DISASSEMBLY AND MAINTENANCE 24 GENERAL 24 22 TOP PANEL 241 2 3 UPPER MANUAL ASSEMBLY 241 24 END BLOCKS LOWER MANUAL 24 25 LOWER MANUAL ASSEMBLY 2 1 2 6 ASSEMBLY 2 1 27 POWER SWITCH AND UPPER RIGHT END BLOCK 24 28 END BLOCK POTENTIOMETER 24 2 9 ROCKER TAB REMOVAL 23 2 10 PRINTED WIRING BOARDS 22 2 11 UPPER OR LOWER MANUAL KEYS 22 2 12 SUPPLY 22 2 13 REVERB UNIT ACCESS 22 2 14 EXPRESSION PEDAL 22 215 LOWER SECTION COVER 22 2 16 POWER SUPPLY LOWER SECTION 22 2 17 PEDAL KEY BOARD ASSEMBLY 22 MAINTENANCE AND SERVICE HINTS 2 18 TEST AND ADJUSTMENT PROCEDURE 2 4 thru 2 10 SECTION DIAGRAM AND TEXT GENERAL 3 1 LIST OF ILLUSTRATIONS Figure 3 1 32 33 34 35 36 33 38 39 3 11 3 12 LOGIC DIAGRAM 2 1 3 2 LOGIC DIAGRAM 2 2 3
23. IN PLUG A 6 0 5 6 R9 R8 4 4700 4700 4700 TOS R2I 32 lt R20 R3I 2 lt RIG 2200 10 2200 10K 10 5 2200 04 100K R5I 4 10K 223 35341 223 35241 12 223 35341 MDD BUFFER BOARD This board provides the clocks to drive the DV 4 Board on which wave forms are squared and approximately 5096 duty cycle There are 12 transistors located on this board which are Q1 through 012 The inputs of these transistors are connected through RC filters but the input of Q12 is connected through resistor only to the connector J302 These inputs from the MDD Generator Board enter on J302 pin 4 through pin 16 but pin 15 is not used These input wave forms are not 50 duty cycle those are 3096 7096 duty cycle but Note pin 16 is 50 duty cycle These inputs are fed to RC time delay circuits These time delay circuits provide the charge up without time delay and the discharge down with time delay and these signals are fed to buffer transistors which operate inverters These output wave forms are approximately 50 duty cycle The output of Note is inverted only These outputs come on J301 pin 1 through pin 12 and these signal voltages are approximately 12 volts negative going in amplitude The connector J302 is connected to the connector P302 of MG 4 MDD Generator Board and the connector J301 is connected to T1 through T12 T37 T38 and T39 of DV 4 Di
24. OCTAVE 1 HIGH OCTAVE BASS 1 BASS 13 NOTES 7 NOTES X5 BASS RANGE Figure 1 MANUAL 8 PEDAL KEYING INPUT R4S 1297 8600 1 OUTPUT gt MANUAL 8 o PEDAL COM 7 470 022 99699999 1504 OOG R40 33K C 56K czg 476 Rig X5 BASS GENERATOR BOARD 223 35386 65 02 DI 0000 1 04 08 0807 Ev 0201 1 09 W O 5 4 2 MVGND C Ax A FOE MANUAL amp PEDAL KEYING INPUT 2508 4504 3503 2947999999 909999999 0099909909 T oof inn MU m 11 ZEE mr 005 03 02 01 0000 III EoGS 02 01 0000 5 Eo GS 03 02 D 0000 04 08 08076 9201 04 05 08 07 02 01 Lo 09 0 69 9900 P CLOCK INPUT GND fov aici DIVIDER GEN 1BOARD 1229 20318 E MDD MA BOARD 228 19312 5 BASS GEN BOARD 223 35386
25. R12 protects the transistor and 06 from over load HEAT SINK 341 06003 HEAT SINK 341 06004 224 05311 224 05211 4 4 ADS N TERMINALS FIGURE 3 9 PS 5 B 224 05311 POWER SUPPLY BOARD LAYOUT amp THEORY 3 10 e a 27 30 WATT POWER AMPLIFIER MODULE This Amplifier is formed by two 2 stages The first stage is a differential voltage amplifier and the second stage is a voltage and power amplifier of the symmetrical inverted darlington type A differential amplifier Operational Amplifier used for the input circuit keeps the output at D C ground by compensating the bias of the output transistors This circuit makes symmetry comple mentary output practical by eliminating the bias problems 1 is biased equally to ground with R2 and Since the load is Pin 2 of 1 through ground potential is achieved at the load o 3 sHotsen IC The feedback path from the load to Pin 2 of 1 1 also presents a convenient way to apply A C feedback The amount of feedback is controlled by R3 and 4 and their ratio determines the overall gain of the amplifier The very high op n loop gain which permits the large negative feedback is due to 1 which operates class A with D C to high frequency NOTES Y A61 012 03 4 01 02 03 04 05 on MAIN AN 218 02 319 23001 337 06013 306 01017
26. RESISTORS ARE IN OHMS 5 1 4 WATT MDD GENERATOR BOARD ALL CAPACITORS IN MICROFARADS 3 DSYMBOL DENOTES NUMBERS IN TERMINALS SYMBOL DENOTES TANTALUME CAPAC MG 14A 228 19337 SCHEMATIC DIAGRAM AND LAYOUT 3 8A 3 9A ADD 1 to DIVIDER cS M D D GENERATOR BOARD LC Oscillator with vibrato Assembly 228 19237 inclues vibrato oscillator and a high frequency LC oscillator is used to drive the M D D generator The vibrato oscillator is a phase shift type comprised of Cil C12 R11 R12 R13 R14 R15 R16 03 and 04 Pot is used adjust the oscillator s frequency The vibrato signal is coupled through C14 R17 and C15 to the base of transistor where it is amplified its width being controlled by VR2 Vibrato may be trned off by connecting 3202 2 to 1202 1 GND and may be reduced for Vibrato or Vibrato 1 by connecting J202 2 through switch Vibrato and Vibratol to 4202 1 To achieve a better sine wave the vibrato signals is filtered by R21 and C16 and is then coupled to the LC oscillator circuitry by C17 LC MASTER OSCILLATOR at VIBRATO LEVEL The LC oscillator is comprised of L1 01 C1 C2 C3 C4 R4 RS RG and 01 and is a Colpitts type 01 varicap diode is used to vary the oscillator s frequency for vibrato and tuning control As the voltage at the junction of C1 and 01 becomes more negative the ca
27. Wiev tuv 77 amp 4 5874 4 lo n 2 153 1 ov 1 2 s e 3 ck R dp uo24 2 10 u 12 13 14 14 13 7 44 lo 3 s 5 524 tolika m do IW mem CD Ho Win AA SEU 1 Cock is m 2 re 29 172 T by 1 2 Cech 52 1 b Cock 16 42 4 Z uv 8 4 Cock 4 14 N C 44 Clock 10 Z Clock 2 9 45 MC 44 TIT Sow aT 4 RITE 4 Strings 2 Full rhea 3 Teste Brass O 1 Drawhay Dawhas 4 Str TN Np SIK QW i DG GR RX i UIW q TS 2 1033 005 5k i wal Theatre CENE ies 1 RSG B aepo 01 9 O ROS Riy 8 Deme e 0 27 c RI ocu 2 m A 72 11411211115 cig 33K Rul t o 28 c BKA Races 439 S bo P Ri be 2x0 2 Ry W TDRS MAIN AMP BOARD PW 27 B 218 02311 218 02211 NOTES 319 23001 ppOISIA 77975 s 01 2 337 06013 RD 15EC 034 306 01017 152473 maid ai 305 03040 2508450 02 305 04012 250381 4 yo 03 305 02
28. footage of the pitch corresponds to 4 and 2 2 3 of Tone Bars Percussion affects all upper Tone Bar setting but not Preset Tones It has two decay times approximately 1 5 seconds Slow and 80 msec Fast REPEAT The same Percussion gate can be activated by a reiteration or repeat Oscillator and affect the same Percussions The Oscillator rate is variable from 13 times 10 seconds to 500 msec The Repeat Rate control is located on the lower right hand End Block Assembly The End Block also contains other Tabs and controls whose functions are the following Pedal String Bass Mute Reverb Volume and Brilliance 12 1 9 1 10 1 12 PEDALS A 13 note Spinet Pedal of the Block Module Design is used The keying contacts are used the Rocker type with the middle contact used for Common series of latching D C gates determines the desired bass note These contacts are wired High Note Select The latching Keyer Gates hold for at least two 2 seconds but release instantly with the next pedal depressed The selected output is then amplified to produce the 8 bass note and then frequency divided one 1 time in F F circuit to produce the 16 bass note An output gate controls the Pedal Sustain envelope The sustain decay time is selected by String Bass Tabs those its decay times are follows Tab Decay Time String Bass I 350 msec String Bass II 700 msec String Bass 1 II 1 5 sec The Bass Note is selected 8
29. is added to bus bars of the keyboard When this voltage is much different from the mean value for the signal of divider out over 0 3 volt a key noise will be loud 2 29 PS 5 B 224 05311 POWER SUPPLY BOARD This board provides the power supply regulated circuits for the organ circuits The outputs are unregulated for the LED Pilot light and Expression Pedal light and the voltage outputs are regulated for the organ circuits The current is about 15Ma for LED on terminals 6 and 7 and about 100Ma for the Expression light on terminals 8 and 9 The voltage outputs are 15 volts on terminal 12 14 volts on terminal 14 and 27 volts on terminal 16 The output of 15 volts and 14 volts are used for the control and pre amplifier and the outputs of 14 volts and 27 volts are used for generators CURRENT OUT c 15MA 047 NOTES 101 306 01023 18201 02 306 01024 18221 03 337 0200 022 6 2A 01 305 03027 2501226 02 305 03040 2509450 03 4 305 01008 2547330 05 6 305 01013 2544907 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN OHMS 5 1 4WATT ALL CAPACITORS ARE MICROFARADS SYMBOL DENOTES NUMBERS IN TERMINALS The regulated voltages are referenced from zener diode D3 its voltage is approximately 6 volts The 15 volts is decided by resistor R7 and R8 the 14 volts is decided by resistor R14 and R16 and the 27 volts is decided by resistor R9 and R10 The resistor
30. position Do not lift by keys 2 6 2 8 BAR ASSEMBLY a Unplug Upper and Lower tone bar connectors for T G 15 B PWB assembly located under Upper Manual Assembly b Remove self tapping screws mounting Tone Bars to Upper Manual Assembly POWER SWITCH AND UPPER MANUAL RIGHT HAND END BLOCK a Follow steps 2 2 thru 2 3 b Remove End Block by removing one 1 screw at rear top of End Block Screw located under felt c Raise manual and from under End Block remove screw d Between Front Strip remove small screw fastening strip to End Block Lift up End Block e From under side of End Block remove two s screws fastening cover to switch Remove cover f To remove power switch after End Block is loose from Manual remove two 2 black screws from top of End Block Switch now can be removed from under side of End Block Reassemble in reverse procedure TO REMOVE END BLOCK POTENTIOMETERS Follow step 2 2 thru 2 5 b Remove knob of potentiometer Volume Brilliance or Repeat by loosening small set screw in knob c Remove End Block by removing two 2 screws top rear of End Block Lift Block d Remove hex nut securing potentiometer to End Block Potentiometer can be removed from bottom side of Assembly ROCKER TABS REMOVAL a Proceed as stated in Stepes 2 2 thru 2 4 b From under side of End Block remove top and bottom screw of associated Rocker Tab Assembly Rocker Tab will lift ou
31. rms 2 2 3 0 75v rms MA 0 75v rms 1 3 5 je 0 75v rms 1 Tom 0 8v rms DEPRESS TAB OR EXTEND TONE BAR PLAY KEYS OSCILLOSCOPE ADJUST OR OTHER IND FIG STEP TEST amp TEST POINT c Bass 5 a 1 Bass Level across Speaker b II Bass Decay Time across Speaker c Manual Bass Across Speaker 6 a Across Speaker Noise Level 7 a Across Speaker 1 Lower Man Tone Bar 8 Tone Bar 4 Tone Bar 2 2 3 Tone Bar 2 Tone Bar 1 3 5 Tone Bar 1 1 3 Tone Bar 1 Tone Bar Bass ToneBar to 8 Bass Tab to 8 Bass ToneBar to 8 Bass Tab to 8 Mute Tab to QN String Bass Tab to OFF String Bass Tab I to ON String Bass Tab II to ON String Bass Tab I amp II to ON Bass to lower Tab to ON Extent of Expression Pedal Full Tibias Tab to ON All tabs to Except Reverb Tab amp Mute Tab All ToneBar to 8 All Tabs to OFF 11 ToneBar to 0 OFF and Percussion Tabs to ON 1 0 rms 0 9v rms 0 75v rms 0 75v rms 0 75v rms 0 75v rms 0 8v rms Pedal Key Pot VR1 on 1 0 rms of high note EF 24 Pedal Key G Pedal Key C of Low Note Pedal Key of High Note 1 4v 0 5v rms 1 8v 0 5v rms 0 92v 0 5v rms Pedal Key 11 decay 150 msec of High Note Lower Man Key lowest to of 20 notes Mid Key C on Up Man Mid Key C on Up Man 6 Low Man Time are 15 MAX
32. sec Reit to Reit 7047 msec Fast MAX Vibrato 10 a Test Point Vibrato I amp II Pot VR1 on t 152 msec 5 R 26 on MG 4 B Bd Tab to MG 4 B Board 6 8Hz 6 Pot VR2 on 8v p p MG 4 B Board 2 Vibrato 1 amp II Ov Tab to OFF Vibrato 1 Tab 2v pp 7 to Vibrato Tab 4v to Reverb 11 a Test Point Low Man Tone Middle Key C on Pot VR2 on 2v p p 7 R 43 amp on PA 56 Bar 8 to 8 Lower Manual PA 56 Board Board b Test Point Reverb I amp II Mid Key C Pot VR4 on About 70 mv amp 8 Reverb Tab amp Ear Tab to E amp Gon PA 56 Board Decay Low Man Time 2 5 3 sec Balance Ear Pot VR3 on Same Level on PA 56 Board Reverb from I amp II to ON A 11 Step Test amp Test Point Depress Tab or Extend Tone Bar Play Keys Adjust Oscilloscope or Other Ind Fig 12 a 12 a 13 a Other Operation Leslie Socket Pin 7 Pon 6 1 Leslie ON OFF to Leslie Slow Fast to Fast Leslie ON OFF to OFF Ensemble Tab to Lower Man Tone Bar sets to 8666444 String Tab to ON Upper Man Tone Bar sets to 008888666 Full Tibias Tab to do sets 806808006 Theater Brass Tab to do sets 848868666 Note That Pin 6 is Pin 7 is removed from ground Pin 1 Tab is returned to Slow Pin 7 will Pin 6 and Pi
33. sev AlddNS A001 318V9 y gt o Lvwoor 018 5 80010 208 022 VS 8 16 4 21010 208 2313 890148 13 908 NI SHJ8WNN 108WAS D 72 NI SHOLIOV4VO 11V wad 2031312345 3SIMH3HLO SS31NN 1 cok S310N Dud usiiranv DES Em 4 gt wa e 9 TA dans oio coe ve YS ESV 90ESI vz 54 GHVOB ISNA A001 vevt vez 06254 ISNA 101 19691 92 VEZ AladnS A0yZ 70227 CE Sd TA 14405 8 A001 21 54 GHYOB 14405 B3MOd 5 1051 9202 9101 22 O O O 104 OL zorr torr CURRENT OUT 15MA 27 27 NOTES 1 01 306 01023 182 1 02 306 01024 18221 03 04 337 06013 RD 15EC 05 337 06015 RD 27EB ai 305 04005 280234 02 03 305 01013 2 100V amp 120V SUPPLY F1 F2 302 01012 220V amp 240V SUPPLY F1 F2 302 01073 FAST BLOW 2SA490Y 100 amp 120 SUPPLY 400mAT SLOW BLOW 3 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN OHMS 10 1 2 WATT ALL CAPACITORS ARE IN MICROFARADS 220 amp 240V SUPPLY 4 SYMBOL DENOTES NUMBERS IN TERMINALS SYMBOL DENOTES TANTALUME CAPAC FIGURE 3 15 ADD 1 PS 17 2
34. 010 258536 oo 04 30501009 254627 16 62 Q5 305 0401 280188 2 RESISTORS RS R9 R13 R15 R17 R19 ARE 3101 2 WATT gt UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN OHMS 5 1 4 WATT Pa ALL CAPACITORS ARE IN MICROFARADS 4 0 SYMBOL DENOTES NUMBERS IN TERMINALS DIV 9 Transistors Q2 and 04 Q3 and O5 are Inverted 2 of Two diodes D3 and D4 and transistor Q1 represent part of the load seen by 1 1 and perform the Darlington connected Q2 and O4 is like a NPN by important function of biasing the output transistors transistor and Q5 is like a PNP transistor verall In order for Q2 and Q3 to be biased on the voltage gain drops across collecter to emitter of 01 must equal RC pad R18 and CB across the load provides high ue to the voltage drops across the emitters O2 and O3 frequency stabilization C7 is high frequency high plus the drops across R14 and R16 The current compensation of second stage amplifier and C3 is through the Q1 is determined by R10 and R11 and high frequency compensation of overall amplifier this current in turn determines the voltage drop across the 01 by VR1 A 04 05 quiescent current of approximately 100Ma is necessary to prevent crossover distortion then this current determines the voltage drop across R12 or R20 and the voltage is approximately 35 Mv The quiescent current must be determined by adjusting VR1 to clockwise completely and
35. 04 and 04 in turn sends gating pulse to the 3 envelope NAND gates of ICi4 A B and C The result of this operation is the gating of the appropriate bass tones through the envelope gates to the RC mute filter If String Bass is selected the envelope generator continues to function after the key or pedal is released and a sustain effect occurs At the RC mute filter transistors 08 and Q9 normally permit maximum bass signal to reach amplifier Q10 When the mute tab is activated transistors 09 and Q10 conduct and shunt a portion of the bass signal away from 010 The result of the mute operation is significant drop in volume of the bass tones The output signal of the mute filfer feeds amplifier 010 travels through the bass level adjust potentiometer and leaves the Bass Generator Board at 7507 pin 1 After leaving the Bass Generator Board the bass signal travels to the organ preamp where it mixes with signals from other systems of the organ GENERATION OF BASS TONES EXAMPLES As stated previously the Bass Gener ator Board contains 10 basic sections These sections interact to produce all base tones required by the organ The operation of the Board however is not consistent over the entire pedal and manual frequency ranges The board can operate in five different modes and the selected pedal or lower manual keys in the 16 or 8 settings determine the appropriate mode The following list defi
36. 1 grd to the data line of data selectors Finally the logic 0 14V 00 out of IC7C pin 10 travels to pin 9 of IC11C and to pin 13 of IC8D NANDS the logic 1 grd of the keydown buss and the logic 0 14V output of IC7C This holds pin 8 of IC8C to logic 1 grd Consequently the flip flop IC8C 8A places a logic 1 grd level on the data line of the data selectors At this time data selectors ICs 4 5 and 6 receive logic 1 5 grd at their A B and C inputs These inputs will be maintained by the flip flops even after pedal 2 is released to allow the sustain in String Bass Only 1 5 responds to the code at its B and C inputs because IC4 and 6 are disabled by the logic 1 grd levels at their D inputs The result of this process is the transferri the bass signal from the X7 data input of IC5 to the Z signal output of 1 signal is available on the Z line because the Z output pins of disabled ICs 4 and 6 are at high impedances The Cf square wave released by the data selector is inverted by NAND gate 1 12 This inverted signal travels to pin 12 of IC12D as well as to pin 11 of 1 15 IC15 divides the Cf bass signal by 2 twice The resultant signal from the first stage of division leaves 1 15 at pin 13 and enters NAND gate IC12A at pin 2 the signal from the second stage leaves 1 15 at pin 1 and enters IC12 at pin 6 At this time the highest CH frequency high bass is a
37. 1 319 23001 uPCISI 2 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN OHMS 5 1 4 ALL CAPACITORS ARE IN MICROFARADS A SYMBOL DENOTES NUMBERS IN TERI 212 SYMBOL DENOTES SAME CIRCUIT 22341TKAD EL SB 5 B 223 17 PEDAL BOAR This board Signals with sus The clocks fr input on termi 22 T24 T26 Keys conni 715 T17 719 and 35 The This Pedal Key Select and 1 This section i other notes are the terminal T and the capaci R27 The curr 01 and 02 capabilities of and 025 befor This envelope D1 and R33 Bass Tabs in the envelope of STRING BASS OUTPUT Q m r tat 1 Pe 1 R20 Rat 1822 1924 18251 cie ciej cis czej ces cza cesi EUERE TE d 1 he in ri Ice al les den pal pel ler Ics 1 deo d lee t d Rej 1 17 1 RS 17 R7 17 09 i tuo IC nid Iii p 6 M B 1029 306 01017 182473 106 305 03002 2508280 os 03040 2569450 305 03023 256100061 085 ARE IN OHMS 5 1 4WATT TORS ARE IN MICROFARADS AND AUF THROUGH 4 7 ARE USED TANTALUM 10 L DENOTES NUMBERS IN TERMINAI L DENOTES SAME CIRCUIT 223 17311 PEDAL BOARD This board provides the 13 Pedal Bass Notes Signals with sustain String Bass or without Sustain The clocks f
38. 15022 WASHER PANEL 401 02294 COVER a 401 03236 POWER SUPPLY UNIT BOTTOM VIEW 4 10 SOCKET NEON LAMP TERMINAL 317 01015 308 02006 WIRE ASSEMBLY Q 105 07401 19 18 WASHER 402 05002 BUSH 340 04005 MAIN AMP PANNEL 401 02293 CIRCUIT BREAKER 302 02020 BUSH 402 01032 MAIN AMP MODULE 105 06205 P W B ONLY CHASSIS 218 02311 401 01109A TRANSFORMER 307 01079 120 ONLY 307 01078 OTHERS DIODE CAPACITOR 311 1014 SEDNA 30 WATT MAIN AMPLIFIER COMPLETE 105 07304 SCREW 323 17017 MAIN AMP COVER 401 01110A CAUTION MARK 402 09190 4 12 NATURAL KEY ASSEMBLY 237 00602 6 KEY ONLY 237 00211 209 00011 B 237 00210 209 00010 A 237 00209 209 00009 23700208 209 00008 23700207 209 00007 237 00206 209 00006 23700205 209 00005 23700212 209 00004 SHARP KEY ASSEMBLY 237 00213 SHARP KEY 209 00013 KEY CHANNEL 237 00019 KEY SPRING TAP SCREW FOR FIXING MOLD SW COVER C 4 238 00004 LOCK SPRING 209 00047 Z PLATE RESISTOR 100KOHm SW COVER B 4 238 00003 320 06104 441 USED 237 00007 GUIDE BUSH 209 00022 CONTACT LEAF N 490 USED SIDE BLOCK 2 USED 237 00002 SW COVER 4 238 00002 L PLATE 401 03179 BUS BAR 44P 238 00007 POLYURETHANE COATED WIRE 504 17002 CONTACT LEAF P 49 USED 237 00008 FIGURE 2 MANUAL ASSEMBLY UPPER MANUAL AK 6
39. 24 14316 PS 32 224 15301 SCHEMATIC OF POWER SUPPLY BOARD 3 16A ADD 1 AND LAYOUT 224 14316 PS 17 a 14216 ps 32 224 15301 224 15201 APPENDIX LIST OF ILLUSTRATIONS 5 ke PAGE LOGIC DIAGRAM NO 1 105309301 A 2 LOGIC DIAGRAM NO 2 no 105 09301 39e 4 A DIVIDER GENERATOR BOARD DV 4 C 229 20318 eise ope AR 4 BASS GENERATOR BOARD EF 24 4 223 35386 OOOO x 5 POWER SUPPLY UNIT 105 09302 1 oe leew at 6 POWER SUPPLY BOARD PS 17 224 14216 5 5 2 gt 4 7 M D D GENERATOR BOARD MG 4 B 228 19212 A 8 SETUP PROCEDURE oeo eoque t 2h e 9 PARTS LIST 217 THE ABOVE NEW BOARDS USED IN THE UPDATED MODEL 5 WITH BASS LOWER MANUAL COUPLER SCHEMATICS FOR THOSE BOARDS COMMON TO BOTH X 5 MODELS ARE LISTED BELOW SEE THE EXISTING X 5 H0 1296 SERVICE MANUAL GATE amp PERCUSSION AMP BOARD PA 33 219 04312 3 6 PRE amp REVERB AMP BOARD PA 56 219 51306 fes eie ei ad TAS ZA MIXTONE BOARD TG 15 B 4 232 02311 oe aaa do 0 0 oe 30W POWER AMP MODULE 218 02311 3 11 M D D BUFFER BOARD 4 223 35341 2 28 27V 10 41 IDIVIDER GEN
40. 2500 20 18913504 JHNLVNNIN 17010 20 1 3504 JHNLVNNIW 133 208 8 9n14 STVNIWH3 L NI SHJ8WNN S310N30 108WAS D Z b t 8 SWHO NI SHOLSIS3H 11V 93131034 ISIMYIHLO SS31NN 1 S310N pru I eee E baku ra 9000805 NO3N 13A HJWHOJSNYHL 1 12010906 30010 390188 11 Tistvez vesd GuvOdasna 1 pe gh ee as iim ss lp 8 AOC 016 311831 90020 80 1 1 AZZOV W3WHOJSNVHI I 12010906 1 390149 1 4 1010 16 13208 Nid 6 100 LIEZOBLZ dWY NIVIA 8 C Md 100t1 0 48 134008 133005 OV FIGURE 3 12 ADD 1 X 5 MAIN AMPLIFIER 105 09329 32 SCHEMATIC OF MAIN AMPLIFIER UNIT 3 13A ADD 1 3 15A ADD 1 90 E 10091 606 48 134908 o gt 82260 ZI 12260 SOL 5 92260 SOL ATddnS 9 s 82260 SOL 14405 AOL LINN 14405 H3MOd 9 60 20 10 O ATddnS 1 84010 206 1090 3 4408 as 11010 208 90 3 ATddNS HJWHOJSNYHL S a 60010 85 ATddNS 8 4 0 80010
41. 3 DIVIDER BOARD LAYOUT amp LIST 3 4 229 20316 DIVIDER BOARD THEORY 3 5 229 20316 GATE AND PERCUSSION AMP BOARD 3 6 LAYOUT AND THEORY 219 04312 PRE AND REVERB AMP BOARD 3 7 LAYOUT AND THEORY 219 51306 PEDAL BOARD LAYOUT AND THEORY 3 8 223 17311 MIXTONE BOARD LAYOUT AND THEORY 3 9 232 02311 POWER SUPPLY BOARD LAYOUT AND THEORY 3 10 224 05311 30W POWER AMPLIFIER MODULE LAYOUT AND THEORY 218 02311 3 11 MDD GENERATOR TWO PACAGE SYSTEM VIBRATOABLE LAYOUT AND THEORY 228 19312 3 12 MDD BUFFER BOARD LAYOUT AND THEORY 3 13 223 35341 SECTION IV ILLUSTRATION PARTS LIST 4 1 INDEX 4 1 1 HOW THE ORGAN OPERATES DD X 5 18050K GENERAL PERFORMANCE DESCRIPTION 1 1 1 2 1 3 14 1 5 1 6 GENERAL This section contain a brief description of the various sections of the instrument CABINETRY The metal frame and wood panels coated with vinyl leather and CHS form the case work Case has a metal handle for carring and a removable key cover TONE SOURCE The X 5 18050K utilizes the single master oscillator with the multiderivative divider MDD system The twelve 12 1 5 mounted on the 229 20316 DV 4B Divider Generator Board provide the division of outputs and provide the sine wave tones seventy nine 79 tones made use of by the instrument MANUAL The 18050K uses two 2 44 note Manual that Upper Manual has 10 contacts under each key The Man
42. 3 02 01 0000 16 050 02 01 0000 Eo GS 03 02 01 0000 1c3 D4 05 0607 0201 1 2 04 05 06 07 02 01 ict 04 05 06 D7 Ei 02 01 C19 C20 cu uum dcus US B G Fe D C 05 FF is CLOCK INPUT 223 35386 223 35388 1 XS X6 x m 4502 BASS GENERATOR BOARD EF 24 223 35386 Te 2150 50 s 19252 501 4405 Ass 1133205 9 59114 STYNIWH3L SYJ8WNN 831030 108WAS 1 Z NI SHOLIJYdYJ 119 3131140 OL 104 1 3 1003NIT7 133205 46 C 9 0 8 6 8084 BLOLO LOE IA1NO 02 110090 3 35 1 LIT E 188 a an cq His i su gt g Q ig 1034 5 0 0313193dS 3SIMH3HLO SSIINN 1 S310N 021 805 TT iNOS APZOV 62 54 lyCpl pzZ 3504 AINO 9 0 61010 20 81010 20 9 69 22 144085 H3MOd 2017 11 54 O W 101 Power Supply Unit 105 09302 A 6 RI HEAT SINK R2 1800 341 06004 LED P L CURRENT OUT ci 15 _ 047 4204 4 EXP LAMP 4
43. 3 7 3503 8 1503 9 1503 10 1503 11 1503 12 1503 13 1503 14 1503 15 05034 J503 2 1503 3 1503 4 J503 5 11505 5 1505 6 1505 7 1504 2 1504 3 1504 4 1504 5 1503 1 D7 of IC3 pin 4 D6 of IC3 pin 3 DS of IC3 pin 2 D4 of IC3 pin 1 D3 of IC3 pin 13 D2 of IC3 pin 12 D1 of IC3 pin 11 DO of IC3 pin 10 D7 of IC2 pin 4 D6 of IC2 pin 3 DS of IC2 pin 2 D4 of IC2 pin 1 D3 of IC2 pin 12 D2 of IC2 pin 11 D1 of IC2 pin 10 DO of IC2 pin 9 D7 of ICI pin 4 D6 of ICI pin 3 DS of IC1 pin 2 D4 of ICI pin 1 DO of IC3 pin 10 D7oflC2pin4 D6 of IC2 pin 3 DS of IC2 pin 2 D4 of IC2 pin 1 D7 of IC3 pin 4 D6 of IC3 pin3 DS of IC3 pin 2 D4 of IC3 pin 1 D3 of IC3 pin 13 D2 of IC3 pin 12 D1 of IC3 pin 11 DO of IC3 pin 10 5 vette NIHON HAMMOND SERVICE NEWS HAMOND LTD SERVICE DEPARTMENT 2 30 2 chome Shinkitajima Suminoe ku Osaka Japan 7 559 Volume 1 Number 1 SEPTEMBER 1977 NEW X 5 CHANGES Eight new pages for the NEW X 5 18150K Appendix HO I296A are enclosed These pages should be inserted into your NEW X 5 18150K Appendix in place of the pages that are there now Three of the pages 3 8 3 9 ADD 1 3 8A 3 9A ADD 2 and 3 3 9A ADD 3 concern changes in the M D D Genrator Board and the M D D Buffer Board Five of the pages 3 13A ADD 1 3 15A ADD 1 3 16A ADD 1 4 7A ADD 1 and 4 7A ADD 2 concern changes in the Power Supply Unit and the Main Amp Assy TW
44. 305 03040 305 04012 305 02010 305 01009 305 04011 pP RD 182 286 250 258 28A 28D RESISTORS R5 R9 R13 RI6 R UNLESS OTHERWISE SPECIFI ALL RESISTORS ARE IN OH ALL CAPACITORS ARE IN MI 4 SYMBOL DENOTES NUN Two diodes I part of the important fu In order for drops across the voltage plus the dro through the this current across the Q of approxim crossover dis the voltage voltage is The quiesce adjusting VF counterclock in 2 of aly olled by overall op gain s due to to high NOTES 01 2 034 01 02 03 04 05 Cuda ahal wo UFRO A ASOKA 319 23001 pPCISIA 337 06013 RD 15EC 306 01017 152473 305 03040 2569450 305 04012 250381 305 02010 258536 305 01009 254627 305 04011 250188 2 RESISTORSIR5 R9 R13 R15 R17 R19 ARE 10 1 2 3 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN 0 5 1 4 WATT ALL CAPACITORS ARE IN MICROFARADS 4 SYMBOL DENOTES NUMBERS IN TERMINALS Two diodes D3 and D4 and transistor Q1 represent part of the load seen by 1 1 and perform the important function of biasing the output transistors In order for Q2 and to be biased on the voltage drops across collecter to emitter of Q1 must equal the voltage drops across the emitters Q2 and O3 plus the drops across R14 and R16 The current through the Q1 is determined by R10 and R11 and this current in turn determines the vol
45. 400 msec 800 msec 1500 msec NOTE 1 String Bass Tab 6 Mute Tab are achieved except Bass tab 2 Manual Bass note is Low Note Select and 16 only Level is at 20dB 24dB When Exp Pedal MAX to MIN Level is OdB at Exp Pedal MAX 2mv rms MAX 4 mv rms MAX No noise occurs NOTE During Test Procedure the following must be maintained unless otherwise stated a All Control Knobs amp Expression Pedal at Maximum A 10 b All Tabs and all Tone Bars in the off position Depress Tab Oscilloscope Step Test amp Test Point Extend Tone Bar Play Keys Adjust or Other Ind Fig Brilliance amp Freq Response 8 a Across Speaker Upper Man Tone Upper Man Key Point of Brill Bar 4 to 8 F of Lowest Note Volume Max Up Man Key F MIN OdB Set to of Highest Note Volume Control 2dB 4dB 13dB 20dB Percussion 9 a Across Speaker Second Middle Key C on Pot VR2 on t 1500 msec 3 Tab to ON Upper Manual PA 33 B Board Decay Tab to Slow Next Decay Tab t 90 msec to Fast Third Harmonic Check as same to Tab as in step Second to do Sec Harm Harmonic Tab Repeat b Across Speaker Second Harmonic Middle Key C on Reit Volume t 500 100 msec 4 Tab to Upper Manual to Slow Decay Tab to Slow Repeat Tab to and Decay Reit to Reit 1343 times Tab to Fast Slow MIN 10
46. 40D LOWER MANUAL AK 648D MDD Buffer Board 12 223 35341 Diode Zener 12V Diode GENERATOR Board 4 228 19312 Diode Diode Varicap Diode Zener 5 6V Coil 10 uH Transistor NPN Transistor NPN Integrated Circuit Integrated Circuit Integrated Circuit IC Socket 14P Socket Assembly Pot Trim 1000 Ohms Pot Trim 50K Divider Generator Board DV 4 B 229 20316 Diode Integrated Circuit IC Socket 14P Pedal Board SB 5 B 223 17311 Diode Transistor NPN Transistor NPN Integrated Circuit Mix Tone Board TG 15 B 232 02311 Gate amp Percussion Amp Board PA 33 B 219 04312 Diode Diode Zener 12V Transistor Transistor NPN Transistor NPN Transistor FET Wafer Assembly Wafer Assembly Wafer Assembly Wafer Assembly 0 12 0 1 Through 11 0 2 3 0 1 0 4 0 1 0 2 3 4 5 6 IC 1 IC 2 IC 3 P 302 VR 2 VR 1 D 1 Through 72 1 1 Through 12 D 1 Through 29 Q 1 Through 6 Q 7 IC 1 0 1 2 3 4 0 5 0 1 2 3 0 4 5 6 7 8 9 0 13 14 15 0 10 11 12 2705 J703 704 4701 702 4708 707 337 02005 306 01017 306 01017 306 05001 337 06014 322 01028 305 03014 305 03040 319 03001 319 01005 319 01006 303 13005 317 03068 336 01003 336 01009 306 01017 319 01007 303 13005 306 01017 305 03040 305 03023 319 23001 306 01017 337 02007 305 01006 305 03023 305 03040 305 05005 317 03053 317 03054 317 03055 317
47. 5 a DIN Socket 5P 303 14001 Socket 303 09005 CM 3 DIN Cord 440 01002 b Circuit Breaker 1A 30202020 1 b Circuit Breaker 1A 302 02004 NW 1S CSA only Circuit Breaker 1A 302 02020 1 UL amp 100V only CHANGE SERIAL NO 589442 100 AREA SERIAL 585539 Up 120V AREA 4 7 ADD 1 DIFFERENCE BETWEEN NEW AND OLD TYPE POWER SUPPLY UNIT DIFFERENCE BETWEEN NEW TYPE AND OLD TYPE MAIN AMP ASSY lt 220V 8 240V AREA I gt PRESENTED SERVICE MANUAL OLD TYPE ADD NEW TYPE POWER SUPPLY UNIT 105 09204 230V 105 09227 105 09228 220v POWER SUPPLY 240 8 SOCKET 9P 1412 B b FUSE PS 23B 5 17 e POWER SUPPLY JACK 56 7615 31804001 c TRANSFORMER E 06 d AC Power Cable TO MAIN AMP b FUSE PS 33 a DIN SOCKET 5 8 AC SOCKET VIEW NOTE a Power Supply PWB Assy 224 14216 b Fuse Boad Assy 224 14242 Transformer 230V 307 01077 d Socket 317 01015 e Power Supply Cord 504 12002 Plug 316 03001 PS 17 5 238 E 06 1412 8 230v 230v 8 88 PS 32 zs 55 c TRANSFORMER VIEW NOTE a Power Supply PWB Assy 224 1520 25 32 b Fuse Boad Assy 22415206 PS 33 e Transformer 220 240V 30701103 d DIN Socket 303 14001 AC Socket 30309008
48. 60 COVER 401 01142 TONE BAR ASSY 206 03201 INDICATOR STRUP 206 00004 BLACK 206 00018 IVORY 206 00015 MIX Bd 232 06212 UPPER MANUAL ASSY DIVIDER GEN Bd AK 640D 229 20316 FIXING PLATE v 401 03178 FIXING PLATE 401 03180 MDD GEN Bd 228 19312 PEDAL Bd 22327311 3 POWER SUPPLY ASSY 105 07303 END BLOCK ASSY L 105 07211 END BLOCK ASSY 105 07212 GATE amp PERCUSSION AMP 219 51306 PRE amp REVERB AMP Bd 219 51306 INSIDE VIEW OF UPPER MANUAL ASSEMBLY UP FRONT STRIP POWER SWITCH COVER PILOT LAMP 401 02362 301 08006 LED 308 02010 POWER SWITCH VIEW 47 4 8 LOWER R H END BLOCK ONLY 402 04202 TAB 8 PEDAL 16 247 10025 KNOBS 304 01022 TAB REVERS II 247 06010 TAB STRING BASS I 247 06021 po TAB REVERB 1 247 06009 TAB STRING BASS II TAB MUTE 247 06022 247 10019 LOWER RIGHT HAND END BLOCK ASSEMBLY TOP VIEW COMPLETE LOWER L H END BLOCK ONLY 402 04188 TAB DECAY 24700038 TAB VIBRATO I 247 05003 TAB 3rd HARMONIC 247 10037 TAB REPEAT 247 06025 TAB VIBRATO II 247 05004 TAB 2nd HARMONIC 247 10036 TAB SLOW LESLIE FAST TAB 8 ENSEMBLE 247 10023 247 10027 TAB OFF LESLIE ON 247 10022 TAB 8 STRING gt gt 2 24710028 16 THEATER BRASS 247 10030 TAB 16 FULL TIBIAS 247 10029 LOWER LE
49. ABLE or os m vo 68 ae oo 0 X X X X X X X X 0 0 1 0 0 0 1 1 X X 1 1 1 1 1 0 1 0 0 0 0 0 1 1 1 1 0 X Don t Care Logicl High Logic O Low D7 isthe highest priorityand DO isthe lowest The priority encoder is inhibited when the chip enable input E is low When E is high the binary representation of the highest priority input appears on output lines Q2 QO and the group select GS is to indicate that priority inputs are present The enable out EQ is high when no priority inpufs are present Figure 7 8 CHANNEL DATA SELECTOR J TRUTH TABLE 2 0 4 0 1 09 0 0 0 10 1 0 0 x 011 0 0 0 2 0 11 1 0 0 X3 1 010 0 0 X4 1 0 1 0 0 x5 1 0 0 0 1 1 1 0 0 7 9 9 9 1 impedanca Figure 8 Figure 9 X 5 PRIORITY SELECT INPUTS L MKEY PEDALKEY 1 2 3 4 5 6 7 8 9 10 1 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 Ff Note G Note G Note Note Note B Note C Note Cf Note D Note Df Note E Note F Note Note G Note Gf Note A Note Note B Note C Note C Note Note D Note Df Note Note F Note Note G Note Gf Note A Note Note B Note C Note 1505 2 1505 3 1505 7 1505 9 1505 10 J504 1 1504 5 1504 8 1504 9 1504 10 1503 6 150
50. ACITORS ARE IN MICROFARADS NU 1uF THROUGH 4 7pF USED TANTALUM SYMBOL DENOTES NUMBERS IN PLUG tions the plifier lifier upply is jected olume signal signal Lower utput e Pot ot is OOOO M pm 2 The second section of this board provides the reverbration signal This section is formed from twoparts The first is the amplifier drive for the Reverb unit and the second is the amplifier to pickup the Reverb unit The drive amplifier Feeds the current drive type 1 Q9 and 010 That level setting is controlled by VR2 The Resistor R43 provides feedback current The pickup amplifier is formed by the diffrential amplifier Q6 through Q8 The low frequency passed filter is formed by R44 R45 C30 and C31 And this level is controlled by VR3 The output level is controled by VR4 The Reverb Unit is connected through J804 219 51308 219 51206 The output is connected through J806 pin 2 to Reverb Tab in Lower right hand End Block and added to the signal at the Master Volume The connector J805 is for Master Volume and The connector J807 is for the output and the power supply connections FIGURE 3 6 PA 56 219 51306 PRE amp REVERB AMP BOARD LAYOUT amp THEORY 37 STRING BASS 23Y3 58 58 42 COMKY C 0 D D 3 NOTES 1 DI THROUGH 029 306 01017 182473 01 THROUGH 06 305 03002 25082800 07 305 03023 25610000 10
51. BASS LOWER MANUAL COUPLER Depress Tab or Oscilloscope Step Test 8 Test Point Extend Tone Play Keys Adjust or Other Ind Fig Preperations 1 a Connect Pedal Connector Main Amp Connector b Connect Ext Sp 1 Out of Main Amp as Fig 1 And Power Switch is to c Tab s are to OFF All Control Knobs are to MAX Power Supply 2 a Indicator Light Note Confirm b Terminals on 5 17 Light ON Board TERM 12 BLU 25 27 5V TERM 10 GRN 13 TO 15V TERM 8 14 15 5V TERM 7 BRN 18 TO 21V Note Confirm AC Line and GND are u OPEN Tune amp Scale 3 a Across Speaker Upper Man Tone Middle Key A on Coil L1 on 440 Hz Bar 8 108 Up Man MG 4 B Bd b All Foot amp All Keys Note 3dB MIN Sounds two keys next to Except Scale Repeated Output Level y 4 a Across Speaker Up Man 8 Tone Middle Key C on Pot VR1 on Conform Upper Bar to 8 Upper 8 Lower PA 33 B Bd Man 8 Lower Man Low Man 8 Tone Man is same level Bar to 8 b Ensemble Tab Mid amp Pot VR1 1 2v rms to on Loser PA 56 Bd 1 5v 40 3v rms String Tab to ON Mid C E amp 1 5v 0 3v rms Full Tibias Tab G on Upper 1 8v 0 4v rms Theater Brass Tab Manual c Upper Man Tone Note levels 1 4v rms Bar are 20 MAX 0 9v rms 16 Tone Bar 1 9v rms Bam s 1 0v rms os 4 0 75v
52. CIES FROM GENERATOR BOARD SQUARE WAYE CLOCKS 3 BIT NOTE SELECT CODE SELECTED BASS TONE SQUARE WAVE 5 FLIP FLOPS MEMORY CHANNEL DATA SELECTOR MULTIPLEXER MANUAL LOW SELECT PEDALS HIGH SELECT 2 BIT INKIBIT ENABLE CODE INVERTED 2 BIT INH181T ENABLE 105 7 10 CODE 103 8 8 81411 01 102 3 INHIBIT ENABLE CODE RC MUTE FILTER 17 Q8 Q8 ENVELOPE GATES NAND 10 14 03 BASS SELECT GATES NAND 16 12 amp 13 05 06 SIGNALS ENVELOPE GENERATOR 14 STRING BASS TABS USS OV KEYS DOWN 14 KEYS UP JASS SELECT DATA BUSS EF 24 BASS GEN BOARD 223 35386 507 2507 RC FILTER 8 MUTE 48 ra AI GEN 04 16 STRING STRING BASS BASS BASS MUTE 8 D H H H 1 X5 BASS GENERATOR BOARD LOGIC DIAGRAM WI C vb LOW F C B GAG Ce C B MA GHG Fe MOE Il 559 EF 24 BASS GEN BOARD 223 35386 Prodi s GEN Prodi X5 BASS GENERATOR BOARD LOGIC DIAGRAM HAMMOND PART NUMBER J 319 009001 MOTOROLA NUMBER MC 14532 CP RCA NUMBER CD 4532 E 7 8 ENCODER HAMMOND PART NUMBER J 319 010001 MOTOROLA NUMBER MC 14512 CP zPIN 16 PIN 8 DATA SELECTOR Figure6 8 BIT ENCODER TRUTH T
53. CREW 401 03167 NUT 401 05027 KEY COVER 402 07112 HINGA amp B 352 01012 CATCH CLIP 352 01013 METAL HANDLE 401 02380 TOP SECTION OF ORGAN FRONT VIEW SPACER 401 02381 SCREW FOR LOWER MANUAL ASSY FIXING COVER 323 08047 401 03203 EXT IN JACK 318 04001 SCREW FOR UPPER L MANUAL ASSY FIXING 323 08047 MULTI CONNECTOR 401 02366 303 14001 SCREW FOR TOP PANEL FIXING 323 08054 TOP SECTION OF ORGAN BOTTOM VIEW ORNAMENTAL BAR 401 02290 amp WOOD SCREW 327 04015 BADGE amp 401 02383 amp WOOD SCREW 326 08008 TOP SECTION OF ORGAN BACK VIEW KNOB PLATE 401 03216 RIGHT 349 02001 BOLT 401 03217 LEFT 401 05009 NUT CATCH CLIP KNOB 401 03201 UPPER 401 05010 401 03238 LOWER M a FIXTURE I 401 03495 LEG LEFT 401 02288 A LEG RIGHT 401 02289 SCREW 323 04025 401 05021 LEG ASSEMBLY LOWER SECTION OF ORGAN VIEW EXPRESSION PEDAL ASSY amp 105 06203 PEDAL KEY ASSY SCREW NUT 234 02033 24 LIGHT BULB 308 01001 PHOTO CELL 321 01001 SCREW NUT 333 04004 LOWER SECTION TOP COVER 402 07 106 COVER 402 02045 MAIN AMP ASSY 105 07304 BOTTOM BASE 402 07105 MULTI CONNECTOR 317 01009 LOWER SECTION OF ORGAN INSIDE VIEW 45 46 CLANIPER 5 401 03446 TURE FORM OF ORGAN INSIDE VIEW UP TONE BAR ASSEMBLY EM M TOP PANEL 402 07111 FIXTURE 401 032
54. FT HAND END BLOCK ASSEMBLY VIEW COMPLETE LOWER RIGHT HAND END BLOCK ASSEMBLY BOTTOM VIEW COMPLETE WIRE ASSY J 1 105 07401 19 11 WIRE ASSY L 105 07401 19 13 LOWER R H END BLOCK 402 04202 ONLY POT S 10K OHMS 309 74002 POT 500K 5 309 75005 LOWER R H CHASSIS 401 01140 ONLY WIRE ASSY K 105 07401 19 12 SCREW SCREWS 326 01015 330 17008 LOWER LEFT HAND END BLOCK ASSEMBLY BOTTOM VIEW COMPLETE WIRE ASSY D LOWER L H END BLOCK 305 8740 08 907 WIRE ASSY H 4 Y 402 04188 ONLY 105 07401 19 9 RESISTOR 1000 OHMS 92102 53 WIRE ASSY G 105 07401 19 8 RESISTOR 22K OHMS 320 92223 WIRE ASSY 1 105 07401 19 10 LOWER L H CHASSIS 401 01108 CAPACITOR 47 MFD RESISTOR 3300 OHMS 311 04034 320 92322 4 9 CLIP 340 02001 SUPPLY CORD WIRE ASSY 438 02021 120V ONLY 105 07401 19 15 504 12002 230 ONLY P W B ASSY COMPLETE 224 05322 TRANSFORMER 307 01078 120V ONLY JACK 307 01077 OTHERS 318 04001 WIRE ASSY O 105 07401 19 16 _______ E 317 01015 FUSE HOLDER CLIP 303 11002 340 02001 3 FUSE 302 01014 COVER 401 03283 EN EAN 401 03037 TERMINAL 314 03007 CLIP 340 02006 120V ONLY CAPACITOR 047 MFD 340 02005 OTHERS 311 04043 POWER SUPPLY UNIT TOP VIEW 105 07303 CHASSIS 401 01111A CAUTION MARK 402
55. IGHT HAND END BLOCK ELECTRONIC VOLT METER LESLIE OUT 9 9 Fig 9 Og G9 ELECTRONIC INPUT EXT SP OUT VOLT METER OSCILLOSCOPE OSCILLATOR DUMMY RESISTANCE ELECTRONIC VOLT METER PW 27 B Board SECTION Ill DIAGRAMS AND TEXT 0 3 1 GENERAL This section contains schematic diagrams and text to illustrate and provide information necessary to proper organ servicing 3 1 DV 4 B DIVIDER GENER dy BOARD 229 20316 MG 4 Bl M D D GENERATOR BOARD 228 19312 22 SR PP E A lt 5 e m 1990 1 STRING sh GATE 16 9 STRING STRING PEDAL BASS BASS MUTE I 1 1 8 132434 NE UPPER MANUAL KEY ASSY LOWER MANUAL KEY ASSY P403 1 1 DU t ss Sasa 155 2 Cos Ivwlslm 8 0 21 EJ UE S 218 4 E E S 2 p j a Ae ene em ine 2 i5 s d a 5 D ONERE Bo LEEREN m i 5i BIAS l eis 2 P403 THROUGH P405 3 2 FIGURE 3 1 LOGIC DIAGRAM 2 1 LEVEL P903 4903 FILTER i F F 05 06 ING 55 DECAY 33 SAN ON EEEE pe
56. K SUBJECT ADD NEW TYPE POWER SUPPLY UNIT amp MAIN AMP ASSY Refer to appendix Pages 3 13A ADD 1 3 15A ADD 3 16A ADD 1 4 7A ADD 1 and 4 7A ADD 2 SUBJECT CIRCUIT CHANGES ON NEW TYPE MAIN AMP ASSY IN 220V amp 240V AREA CORRECTION Changes Value of Fuses F1 and F2 1AT to 1 6 AT on the 224 15211 PS 34 Fuse Board in the New Type Main Amp Assy Serial No 572263 Up SUBJECT CIRCUIT CHANGES ON NEW TYPE POWER SUPPLY UNIT IN 220V amp 240V AREA CORRECTION Changes value of Fuses F1 and F2 0 63A to 315 mAT on the 224 15206 PS 33 Fuse Board in the New Type Power Supply Unit Serial No 578268 Up and No 580591 Down CORRECTION Changes value of Fuses F1 and F2 315 mAT to 400 mAT on the 224 15206 PS 33 Fuse Board in the New Type Power Supply Unit Serial No 580592 Up SUBJECT BASS GENERATOR P W B EF 24 223 35286 REVISION For output level up Serial No 02200 Up CORRECTION Refer to schematic of 223 35386 Bass Generator Board on Page 3 7A in NEW X 5 service manual HO 1296A Change value of resistor R11 5600 to 4700 DIFFERENCE BETWEEN NEW AND OLD TYPE POWER SUPPLY UNIT DIFFERENCE BETWEEN NEW TYPE AND OLD TYPE MAIN AMP ASSY lt 100V amp 120V AREA gt PRESENTED SERVICE MANUAL OLD TYPE ADD NEW TYPE 105 09201 100V POWER SUPPLY UNIT 105 09292 120V 105 09225 100V POWER SUPPLY UNIT 10509226 120V a SOCKET 1412 8 c FUSE BD PS 23A
57. LECTRONIC VOLT METER OSCILLOSCOPE 10 of NORMAL LEVEL Fig 2 t MAX 10 msec DECAY TIME T A 13 Fig 4 1095 of NORMAL LEVEL Fig LEVEL t DECAY TIME 4 Board OSCILLOSCOPE Fig 5 Fig 6 LEVEL 14 Fig 7 Fig 8 Fig 10 Fig 11 RA 56 Board OSCILLOSCOPE LOWER RIGHT HAND END BLOCK INPUT EXT SP OUT OSCILLATOR PW 27 B Board OR ELECTRONIC VOLT METER LESLIE OUT Fig 9 675 9 OVO OG ELECTRONIC VOLT METER OSCILLOSCOPE DUMMY RESISTANCE ELECTRONIC VOLT METER PARTS LIST X 5 18150 WITH PEDAL COUPLER MDD BUFFER BOARD 12 223 35342 TRANSISTOR 01 thru 012 25694509 305 03040 Dl THRU 011 182473 306 01017 D12 12 Volt Zener 022 12A 337 02005 MDD GENERATOR BOARD MG 4B 228 19212 IC 1 319 03001 or 319 03002 IC 2 319 01005 IC 3 319 01006 TRANSISTOR Q1 THRU Q3 25 1675 305 03063 Q4 THRU 06 28C945Q 305 03040 DIODE DL 182206 306 05001 02 D3 182473 306 01017 5 6 Zener RD 5 6 EB 337 06014 DIVIDER GENERATOR BOARD DV 4 C 229 20218 IC 1 THRU 12 MM5824 319 01007 DIODE D2 THRU D 74 182473 or 306 01017 181555 306 01005 BASS GENERATOR BOARD EF 24 223 35386 16 1 THRU IC 3 MC14532 CP 8 Bit Priority Endcoder 319 09001 IC 4 THRU IC 6 MC14512 CP 8 CH Data Selector 319 10001 IC 7 MC14025 CP Triple Nor Gate 319 06007 IC 8 THRU IC 14 14011 CP Quad Nand Gate 319 06006 16 15
58. MC14013 CP Dual D Flip Flop 319 03004 TRANSISTOR 01 02 04 2869459 305 03040 93 95 THRU 09 28A733Q 305 01008 Q10 2SC1000GR 305 03023 DIODE Dl THRU D21 182473 306 01017 DA 1 THRU DA 6 DIODE ARRAY DAN 4 306 01027 1 THRU RA 6 RESISTOR ARRAY 8 33u 320 97004 C LOWER MANUAL ASSEMBLY AK 649A uw aa PEDAL KEY ASSEMBLY PK 3D 17 MAIN AMP UNIT 105 07402 Circuit Breaker 1 amp 302 02004 Transformer 307 01079 Bridge Diode Pak 5188 306 01021 MAIN AMP BOARD PW 27B 218 02211 IC 1 NPC151A 319 23001 TRANSISTOR 01 2569459 305 03040 92 250381 305 04012 93 258536 305 02010 04 28A627 305 01009 Q5 250188 305 04011 DIODE D1 D2 15v Zener RD15EC 337 06013 D3 182473 306 01017 PRE AND REVERB AMP BOARD PA 56 219 51206 1 1 151 319 23001 TRANSISTOR Q1 Q7 Q8 2SA493GR 305 01006 Q2 THRU Q6 2SC1000GR 305 03023 09 28C509Y 305 03041 Q10 2SA509Y 305 01014 DIODE D1 THRU D3 182473 306 01017 POWER SUPPLY UNIT 105 09302 Power Transformer 120V E 06ul 307 01078 Power Transformer 100 8 230v 06 307 01077 Fuse Board 100v 120v 5 23 224 14341 Fuse Board 230v 224 14342 Fuse 100v 8 120v 5A 302 01018 Fuse 230v 3A 302 01019 POWER SUPPLY BOARD 5 17 224 14216 TRANSISTOR 01 250234 305 04005 92 03 2SA490Y 305 01013 DIODE Di 18201 306 01023 2 18271 306 01024 D3 D 15v Zener RD15EC 337 06013 05 27 Zener RD27EB 337 06015 A 18 H0 1296 A 3M DIV 5 76 PRINTED U S A EE 7 Tee Wicu Bottom
59. O NEW SERVICE SHEETS Service information for two models is enclosed complete manual 00 006023 JR for 123JMR and H000 006041 JR for 124JMR NIHON HAMMOND SERVICE NEWS Volume 1 Number 1 SEPTEMBER 1977 MODEL NEW X 5 18150K SUBJECT MISPRINTED NEW X 5 18150K SERVICE MANUAL CORRECTION Refer to schematic NOTES 1 of 228 19312 M D D Generator Board on Page 3 8A in NEW X 5 18150K service manual HO 1296A WRONG 01 305 03014 25 373 02 THROUGH 06 305 03040 2589450 RIGHT Q1 THROUGH 305 03063 2SC1675L or K 04 THROUGH 06 305 03040 25 9450 SUBJECT ADD PITCH CONTROL IN 220 amp 240V AREA Serial No 572263 Up See detail as follows MDD POWER GENERATOR BD SUPPLY BD Menor 88120 Black Wire P102 14V Green Wire Yellow Wire CABLE ASSY T CAUTION MG 4D is added pin terminal 2P 3203 to MG 4B PARTS Pin Terminal 2P J203 317 03081 5028 2A Cable Assy T 105 03421 Connector 2P P203 317 03001 2139 2 Connector Pin for P203 317 03009 2478 TL Connector Pin for P102 314 07001 1380 TL Potentiometer 10KB 309 17002 EVC BOA S15 Blind 2 401 02418 Bracket 401 03497 Potentiometer Knob 304 02047 FT 20S SUBJECT ADD NEW TYPE M D D GENERATOR BOARD IS USED 1 CHIP LSI S 50240 Except 120V Area Refer to Appendix Page 3 8 3 9 ADD 1 3 8A 3 9A ADD 2 and 3 8A 3 9A ADD 3 NIHON HAMMOND SERVICE NEWS 1 Number 1 SEPTEMBER 1977 MODEL NEW X 5 18150
60. OTE ARE 6STAGES AND F NOTE THROUGH B NOTE ARE 7STAGES 1 D2THROUGH 074 306 222222 2223 NOTES FIGURE 3 4 DV 4B 229 20316 DIVIDER BOARD THEORY 5 R82 R94 ru 1 1 1 5 1 css R58 R7O C99 I R99 8135 RI23 0135 23 bs ej 71 aa to 1 1 a a v x 229 20318 229 20218 Frequency Divider and Filter Assembly DV 4 contains twelve 12 IC packages and Sine Wave Filters These packages contain all circuitry associated with dividing the top octave frequencies actually used in the organ The IC is a MOS type enclosed in a dual inline package and it provides six stages of binary division to produce six octave related outputs of the tone generator Each output of the IC is connected a sine wave filter Three groups of the filters from top octave operate as follows the square wave from divider is transformed into a triangular wave by CR low pass filter ex C1 and R1 and is additionally C89 C77 Clo RI37 RI25 DIVIDER GENERATOR BOARD SCHMATIC AND LAYOUT 1 transformed into similar sine waves by a diode clippers ex D1 and 013 Other groups of the filters consist of only CR type with a sloping character of 12 dB per octave ex C73 R73 C85 and R85 A voltage for a common line of diodes D1 through 072 is smoothed by C171 It is about 6 volts D C and
61. That Pin 6 is grounded to Pin 1 and that Pin 7 is removed from ground Pin 1 If Tab is returned to Slow Pin 7 will be grounded Pin 6 and Pin 7 are removed from ground Pin 1 Note Same Tone as Tone Bar Setting Same Tone as Tone Bar Setting ditto ditto a Confirm that Cabinet can be put on the Leg b Confirm that Pedal Unit can be smoothly inserted Confirm that Knob Bolts can be set normally 23 Step Test 8 Test Point Adjust Oscilloscope or Other Indication Fig Main Amplifier 16 a Preparations Connection as Fig 10 11 10 Across Ext Sp Out b Test Point Pot VR1 on Sot 10mV and about afteral 11 R26 on PW 27 B PW 27 B Board Minute 35mV 5mV Board Note Set VR1 to turn left and turn right ae Stop at 10mV Point c Across Ext Sp Out Input 0 3V rms 1000 2 Output 16V 10 Note Confirm that Output Wave Form is normal or not d Test Point GND 30V 35V DC GND 30V 35V DC FIGURE MONITOR SPEAKER EXT SP OUT a Fig 1 ELECTRONIC VOLT METER OSCILLOSCOPE 10 of NORMAL LEVEL Fig 2 t MAX 10 msec DECAY TIME 2 8 Fig 3 Fig 5 Fig 6 1096 of NORMAL LEVEL LEVEL t DECAY TIME MG 4 B Board Fig 4 COO OSCILLOSCOPE LEVEL 29 Fig 7 Fig 8 Fig 10 Fig 11 2 10 OSCILLOSCOPE 56 Board LOWER R
62. at Tab in Lower left hand End Block This output pulse triggers the transistor Q3 and then the percussion signals is repeated automatically The repeat rate of this oscillator is controlled by Repeat Rate Pot In Lower right hand End Block through J706 in 1 and pin 2 36 a NOTES 1 01 THROUGH 03 306 0101 05 01004 02 THROUGH 06 305 0302 09 305 0304 010 305 0101 101 319 2300 2 UNLESS OTHERWISE SPECIF ALL RESISTORS ARE IN OH ALL CAPACITORS ARE IN M USED TANTALUM 3 SYMBOL DENOTES NUM PA 56 219 51306 PREAMP amp REVERB AMPLIFIER BOARD This board will be described in two sections Section 1 will be the Pre Amplifier for the Expression and the Output of The Main Amplifier and Line Section 2 will be the Reverb Amplifier 1 The signals from PA 33 B and the power supply to PA 33 B are connected to J801 This signal is amplified by transistors Q1 and Q2 and connected to Expression Pedal through J802 and the volume of this signal is controlled by Exp Pedal This signal through transistor Q3 is added to Ext Input signal amplified by Q4 on Master Volume in Lower right hand End Block and the signal is output through OS its level set by VR1 The Brilliance Pot is connected to J806 pin 4 The Brilliance Pot is located on Lower right hand End Block 4805 MASTOR VOLUME tip 101 3 UNLESS OTHERWISE SPECIFIE ALL RESISTORS ARE IN OHMS 5 1 4 ALL CAP
63. c 1 grd levels with pedal 2 depressed flip flop IC13A 13B pro vides a logic 0 14V at its pin 4 ouput and a logic 1 grd at its pin 3 output Even through transistor Q6 is shut off in 8 mode the logic 1 grd output of maintains pin 1 of 2 at ground potential This enables the medium bass gate Refer to board schematic Transistor 05 maintains cutoff poten tial in 8 mode The transistor s high collector emitter resistance develops a logic 0 14V level and applies this level to pin 5 of IC12B The logic 0 14V at pin 5 disables the low bass gate After the medium and high bass signals leave IC12 they enter the envelope gates of IC14 and follow the normal path through the RC mute filter and transistor 010 EXAMPLE 4 MODE 4 Assuming that pedal 98 is depressed and the 16 8 stop is set for 8 the following operation occurs The G low medium and high bass tones are applied to the bass select gates of IC12B A and D in the normal manner Because pedal 98 is depressed the keydown data buss S goes to logic 1 grd and the bass select data buss goes to a logic 0 14V These levels force pin 3 of IC13A to fall to the logic 0 14V level and pin 4 of IC13B to rise to the logic 1 grd level Because the 16 8 tab is set for 8 the outputs of the IC13A 13B flip flop combine with the floating and logic 1 grd potentials at J506 pins 2 and 1 respective
64. e The Following Must Be Maintained Unless Otherwise Stated All Control Knobs and Expression Pedal at Maximum b Tab s and Tone Bars in the Off Position Depress Tab or Oscilloscope Step Test amp Test Point Extend Tone Bat Play Keys Adjust or Other Fig Brilliance amp Freq Response 8 a Across Speaker Upper Man Tone Upper Man Key Point of Brill Bar 4 to 8 F of Lowest Note Volume Max Up Man Key MIN OdB Set to of Highest Note Volume Control 2dB 4dB 13dB 20dB Percussion 9 a Across Speaker Second Harmonic Middle Key C on Pot VR2 t 1500 msec 3 Tab to Upper Manual PA 33 B Board Decay Tab to Slow Next Decay Tab t 90 msec to Fast Third Harmonic Check as same to Tab as in step Second to do Sec Harm Harmonic Tab Repeat b Across Speaker Second Harmonic Middle Key C on Reit Volume t 500 100 msec 4 Tab to Upper Manual to Slow Decay Tab to Slow Repeat Tab to and Decay Reit to Reit 133 times Tab to Fast Slow MIN 10 sec Reit to Reit 70 7 msec Fast MAX Vibrato 10 a Test Point Vibrato I amp II Pot VR1 on t 152 msec 5 R 26 on MG 4 B Tab to MG 4 B Board 6 8Hz 6 Pot VR2 on 8v p p MG 4 B Board Vibrato I amp Ov Tab to Vibrato I Tab 2v to ON Vibrato II Tab 4 Reverb 11 a
65. ect data and transistors Q1 and 02 invert the inhibit enable information Following inversion the two codes travel to the latch stage Latching is accomplished by ICs 8 9 10 and 11 which are quad NAND gates wired as flip flops The latches receive the data from the inverters re invert the infor mation memorize the information and then apply the information to the note select A B C and disable D inputs of the data selector ICs 4 5 and 6 The combination of note select and inhibit data at ICs 4 5 and 6 allows a specific bass frequency from 2501 3502 J503 to pass through the appropriate data selector IC and reach the Z output buss The selected signal enters a buffer stage and flows to the divider stage ICIS Figure 2 demonstrates that IC15 a dual D flip flop generates the low bass and medium bass frequencies The output signal from the data selector ICs clocks IC15 and also feeds IC12 as the high bass signal The high bass medium bass and low bass signals then enter IC12 the bass select gates The combinations of inputs at the bass select gates from the key down data buss S the bass elect data bass R and the 16 8 stop determine which combination of bass frequencies pass through the bass select gates of 1 12 and enter the envelope gates of IC14 During times of manual or pedal down the key down data buss applies an input to the D section of 114 The NAND gate activates transistor
66. edal Unit Assembly D 241 GENERAL This section contains instructions for removal of specific assemblies of the organ Step 2 2 thru 2 13 provide disassembly procedures for the Upper Section Manual Keyboard of the organ Steps 2 14 thru 2 17 provide disassembly procedures for the Lower Section of the organ The removal of some sub assemblies and un plugging connectors or unsoldering is obvious These will not be discussed For reassembly use reverse procedures UPPER SECTION 22 23 24 TOP PANEL a Two 2 bronze screws 6 long located under Upper Section must be removed FIRST Note See Figure 2 1 for location b Near top and center of each side of Upper Section remove bronze screw c From front of top panel lifting evenly raise top to swing up position UPPER MANUAL ASSEMBLY a See figure 2 1 for location Remove six 6 1 long bronze screws from under side of Upper Section b Raise manual to swing up position Do not lift by keys END BLOCKS LOWER MANUAL a Remove two 2 phillips screws from rear of each End Block Assembly b Carefully lift up and avoid marring or scratch ing LOWER MANUAL ASSEMBLY a Lower Manual End Blocks should be removed first to avoid damage to case or other assemblies b See Figure 2 1 for location Remove four 4 1 long bronze screws from under side and toward front of Upper Section c Carefully Manual can be placed in up right
67. ermine the output level of 1 10 pin 4 we must follow the Gs output of IC3 Because priority encoder IC2 receives no logic 1 grd D inputs with the CH pedal depressed its Gs output must maintain a logic 0 14V level Transistor Q2 inverts this logic 0 14V into a logic 1 grd and applies that level to pin 9 of and pin 6 of 0 The logic 1 grd output of Q2 then combines with the logic 1 grd of the keydown buss at 1 10 As a result the NAND gate output pin 10 falls to a logic 0 14V which is transferred to pin 1 of 1 10 Now because the input pin 6 of 1 10 is held to logic 1 grd and the input pin 1 of ICIOA is held to logic 0 14V the latch forces a logic 1 grd ICIOA pin3 The logic 1 grd at 1 10 pin 3 travels to the disable D2 input of data selector IC4 pin 15 This disables IC4 Also the logic 1 grd at pin 3 of 1 10 combines with logic 0 14V from pin 4 of IC9A at IC11A The logic 1 grd and logic 0 14V inputs of force a logic 1 grd at pin 3 of and this level reaches the disable 00 input of IC6 disabling IC6 Thus far we have examined how the Gs outputs of ICs 2 and 3 have formed a 2 bit inhibit enable code that has enabled 1 5 and has inhibited IC4 and 1 6 when the pedal is depressed In order for 1 4 to release the appropriate bass frequency the chip must receive a 3 bit note select code at its A B and C inputs T
68. eys will be downed through J703 or J704 the negative D C voltage is connected to UG point or LG point and Q10 or Q11 is turned off The signals UPMAN INPUT 4701 GND GND GND LOW MAN INPUT 5 4 1 2 12 14 9702 PERCINPUT 5 GND 2 gt 1004 4 DECAY TIME 9 NOTES NOTI 2 UNLESS OTHERWISE SPECIFIED ALL RESISTORS 5 ALL CAPACITORS ARE MICROFAR USED TANTALUM 3 SYMBOL DENOTES NUMBERS IN ARE IN OHMS appear th emitter fc are balan through Ji 2 The se Percussion from and pin The signi controlled amplified and to inp The envel 03 Its c through J and 2 and if pir decay tim percussion HERWISE SPECIFIED N OHMS 5 1 ARE IN MICROFARAUS AND i THROUGH 4 7yF ARE LUM L DENOTES NUMBERS IN PLUG appear through 06 or Q7 which is used as emitter follower The signals gated and amplified are balanced by VR1 and added Pedal signal through J707 and exit at J708 pin 5 2 The second section of this board provides the Percussion signals These signals are applied to J702 from Percussion Tabs in Lower left hand End Block and pin 5 is the input and pin 3 is the output The signal is amplified by 08 which gain is controlled by Q12 Q9 is buffer amplifier and these amplified signal provide to add the Tone Bars signals and to input the upper manual input J701 The envelope of
69. filtered and output to Pedal Tone Bar on Terminal T2 and its output level is controled by FIGURE 3 7 SB 5 B 223 17311 PEDAL BOARD LAYOUT amp THEORY 38 J 602 LOWER KEYS 27807 L La Lose O22 RE Qs E 8 11384 33440 851 91 1620 2682 23Y3 2I 0T GND GND BIAS 25 94 J 602 LOWER KEYS 5 00000 NOTES 1 ALL RESISTORS ARE IN OHMS X575 1 4WATT ALL CAPACITORS ARE MICROFARADS AND ARE USED TANTALUM 10 232 02311 tos 232 02211 Em ENSENBLE PRESETS 607 o e 2 9 PERCUSSION n 160549 9 0 O O 16 8 573 4 224 2 136 1 8 1 GND UPPER TONEBARS TG 15 B 232 02311 MIXTONE BOARD This board provides the Tone Bars tones and Presets Tones of each Manuals upper and Lower The cireuits make up an RC ladder The capacitors are used for D C bias cut and the resistors are used for the signals added The signal inputs are to J602 and J604 through each manual J602 is for Lower Manual and J604 is for upper Manual The output signals leave on J603 J605 J606 and J607 J603 is used for Lower Tone Bars J605 is used for Upper Tone Bars J606 is used for Percussion and J607 is used for Presets Tones Pin 1 thru pin 3 are for Upper Manual Presets the s
70. g Preperations 1 a Connect Pedal Connector Main Amp Connector b Connect Ext Sp 1 Out of Main Amp as A Fig 1 And Power Switch is to c All Tab s are to OFF Control Knobs are to MAX Power Supply 2 a Indicator Light Note Confirm b Terminals on PS 5 B Light ON Board GND B2 BLU 26 27 5v D C GND B1 GRN 14 15v D C GND B1 ORN 14 15 5v D C 18 21 D C Note Confirm Line and GND are OPEN Tune amp Scale 3 a Across Speaker Upper Man Tone Middle Key A on Coil L1 on 440 Hz 8 108 MG 4 B Bd b All Foot amp All All Keys Note 3dB MIN Sounds two keys next to Except Scale Repeated Output Level 4 a Across Speaker Up Man 8 Tone Middle Key C on Pot VR1 on Conform Upper Bar to 8 Upper amp Lower PA 33 B Bd Man amp Lower Man Low Man 8 Tone Man is same level to 8 b Ensemble Tab Mid C E amp Pot VR1 on 3 4v rms to ON G on Lower PA 56 Bd Manual String Tab to ON Mid C E amp 4 5v 0 5v rms Full Tibias Tab on Upper 4 5 0 rms Theater Brass Tab Manual 4 9v 0 5v rms Upper Man Tone Note All levels Bar 20 MAX 16 Tone Bar 3 5v rms 5 1 3 m 2 6v rms 8 lt 2 8 rms 4 2 2 0v rms 2 2 3 2 0v rms 2 z 2 3v rms 1 3 5 a 2 3v rms 1 1 3 ra 2 3v rms 1 5 2 rms 2 4
71. herefore we must return to the Q2 Q1 and 00 outputs of IC2 Earlier we stated that with the D7 input of IC2 held to a logic 1 grd the chip s Q2 Q1 and Q0 outputs were al logic 1 grd levels These levels are sent directly to the inverting NOR gates of IC7 IC7 s A B and C sections invert the Q2 Q1 and 00 outputs of IC2 to logic 0 14V levels These levels are then applied to the latches of ICs 8 and 9 and to NAND gate 1 11 The inverted Q2 output leaves pin 6 of 1 7 as a logic 0 14V This level 15 transferred to pin 13 of IC11D as well as to pin 13 at IC9D At IC11D the logic 1 grd of the keydown data buss com bines with the logic 0 14V to force the NAND gate to release a logic 1 grd to pin 8 of IC9C Now with IC9C and IC9D receiving logic 1 grd and logic 0 14V inputs respectively the pin 11 output of latch IC9C 9D goes to a hi logic 1 grd level This level is applied to the data line of the data selectors ICs 4 5 and 6 The inverted Q1 output leaves pin 9 of IC7B as a logic 0 14V Also from pin 9 the low level travels to pin 5 of IC11B as well as to pin 1 of ICBA At IC11B the logic 0 14V from IC7 pin 9 becomes NANDED with the logic 1 grd of the keydown data buss The NAND process yields a logic 1 grd at pin 6 of IC8B The combination of logic 1 grd at pin 6 of IC8B and the logic 0 at pin 1 of IC8A makes flip flop ICBB BA pro vide a logic
72. ignal of pin 1 is for String that of pin 2 is for Full Tibias and that of pin 3 is for Theater Brass The signal of pin 5 is for Ensemble of Lower Preset The signal of J606 pin 1 is for Third Harmonic and that of J606 pin 2 is for Second Harmonic J601 is fed a negative D C voltage from DV 4 B Divider Generator This voltage is used for the bias and the voltage is about 7 volts D C FIGURE 3 8 TG 15 B 232 02311 MIXTONE BOARD LAYOUT amp THEORY 3 9 GENERATOR TWO PACKAGE SYSTEM VIBRATOABLE LC Oscillator With Vibrato Assembly MG 4 B includes a vibrato oscillator vibrato circuitry and a high frequency LC oscillator used to drive the MDD generator The vibrato oscillator is a phase shift type comprised of C13 C14 C15 R16 R17 R18 R19 R20 R21 04 and O5 is used to adjust the oscillator s frequency The vibrato signal is coupled through C16 R22 and C17 to the base of transistor 06 where it is amplified Its width being controlled by VR2 Vibrato may be turned off by connecting J202 1 to 20V J202 3 and may be reduced for Vibrato I or Vibrato by connecting R24 through J202 2 to 20 To achieve a better sine wave the vibrato signals is filtered by C18 and is then coupled to the LC oscillator circuitry by C19 319 030 101 319 0 101 306 05001 152206 02 03 306 01017 182473 04 337 06014 RD 5 6EB 01 305 03014 280373 Q2THROUGH 06 305 03040 2509450
73. ing applied to pins 1 and 6 of IC14 sections A and B Thus pins 2 and 6 feel logic 1 grd potential as long as the pedal remains depressed Asa result 1 14 and 14B pass the low and medium bass tones into the RC mute filters When the pedal is released with String Bass transistor 03 shuts off and capacitor C3 discharges quickly through the parallel combination R9 and R10 With String Bass 1 the capacitor discharges through the paral lel combination of R9 and R10 in series with a 180K resistance Finally with String Bass the capacitor discharges through the parallel combi nation of R9 and R10 in series with an 820K resistance The availability of these various dis Charge time constants allows control over the conduction time of transistor Q4 which in turn controls the passing of bass tones through the envelope gates of IC14 As the low and medium bass tones leave IC14 they become filtered by an RC network before reaching the bass amplifier Q10 With the mute switch in the off position transistors Q8 and Q9 receive no forward bias from J506 pin 4 and they allow maximum signal to transfer from the filter to the bass of Q10 When mute is selected the transistors receive 14V from pin 4 they conduct and shunt a portion of the signals away from transistor Q10 EXAMPLE i2 MODE 2 Assuming that pedal 8 G is depressed and the 16 8 stop is set for 16 the follow
74. ing operation occurs Note selection at the data selector ICs occurs in the same manner as example 1 except e priority encoder IC3 receives the logic 1 grd keying input at its DS pin 4 e data selector IC4 receives a 1 0 1 code at its A B and C inputs while ICs 5 and 6 are inhibited As a result IC4 passes the low G clock from its X5 input to the Z output buss 1 12 receives the low G square wave from the Z line and sends it to the divider 1 15 to form the low and medium octaves of G Consequently the low bass is available at pin 6 of IC12B the medium bass G is available at pin 2 of IC12A and the high bass G is available at pin 12 of ICI2D The NAND gates of IC12 however cannot pass the three signals until they receive octave select inputs at pins 5 1 and 13 from the octave select circuitry of IC13 Q5 and Q6 Because pedal 8 is within the 6 13 group of pedals the depression of pedal 8 forces logic 1 grd at the keydown data buss S and a logic 0 14V at bass select data buss R This combina tion yields logic 1 grd at the pin 11 output of IC13D The logic 1 grd at pin 11 is sent to pin 1 of and pin 9 of IC13C IC13C NANDS the logic 1 grd from IC13D and the logic 1 grd from the keydown buss to produce a logic 0 14V at its output pin 10 Now with pin 1 of at logic 1 grd and pin 6 of IC13B at logic 0 14V flip flop 1C13A 13B produces a logic 1 grd
75. ly and force pins 5 and 1 of 1 12 and 2 to logic 0 14V levels This action allows only the high bass gate of IC12D to become active and pass a signal to the envelope gates EXAMPLE 45 MODE 5 Assuming the bass to lower tab is set for the position and lower manual key 20 C is depressed the following action occurs With the bass to lower tab on ground is removed from the pedal assembly and applied to a buss bar in the lower manual assembly This rearrangement of ground disables the pedals and enables the first 20 lower manual keys for bass keying When the lower manual keys 1 20 are depressed in bass mode J505 J504 and J503 receive logic 1 grd keying inputs These keying inputs travel through the diode matrix and key the priority encoder ICs Lower manual key 20 for instance places a logic 1 grd at the D4 input of IC1 The note select process from this encoder stage to the data selector stage operates in the same manner as that of the pedal mode TA With lower manual key 20 depressed the high C bass frequency at the X4 input of IC6 is released at the Z output line This frequency travels through 1 12 reaches IC12 pin 12 as the high bass signal and clocks IC15 to form the medium and low bass signals at IC12A pin 2 and IC12B pin 6 As in the pedal modes 1 12 does not pass any signals to the envelope gates of 1 14 until the bass select circuitry C13 05 and Q6 releases logic 1 grd
76. n 7 are Note Same Tone as Tone Bar Setting Same Tone as Tone Bar Setting ditto ditto 14 15 12 Test of Mechanism Operation a Confirm that Tone Bars are easy to operate and that one Tone Bar doesn t disturb other Tone Bar operation and that Mark 8 is visible b Confirm that Keyboards are operational Confirm that Expression Pedal is normal to operate and to stop at will d Confirm that position of Knob Mark is normal e Confirm that Pedal Keys are normal to operate f Confirm that Tab s are normal to operate Assembly a Confirm that Cabinet can be put on the Leg b Confirm that Pedal Unit can be smoothly inserted Confirm that Knob Bolts can be set normally grounded to Pin 1 and that be grounded removed from ground Pin 1 J Step Test amp Test Point Adjust Oscilloscope or Other Indication Fig Main Amplifier 16 a Preparations Connection as Fig 10 11 10 Across Ext Sp Out b Test Point Pot VR1 on Sot 10mV and about afteral 11 R26 PW 27 B PW 27 B Board Minute 35mV 5mV Board Note Set VR1 to turn left and turn right Stop at 10mV Point Across Ext Sp Out Input 0 3V rms 1000 2 Output 16V 10 pr Note Confirm that Output Wave Form is normal or not d Test Point GND 30V 35V DC GND 30V 35V DC 4 FIGURE MONITOR SPEAKER EXT SP OUT Fig 1 E
77. nes the conditions which set the Bags Generator Board for the various modes of operation Mode 1 The pressing of a pedal 1 5 low C through E when the bass stop is set for 16 Mode 2 The pressing of a pedal 6 13 F through high C when the bass stop is set for 16 Mode 3 The pressing of a pedal 1 5 when the bass stop is set for 8 Mode 4 The pressing of a pedal 6 13 when the bass stop is set for 8 Mode 5 The pressing of a lower manual key 1 20 when the bass to lower coupler is ON In each of these modes the String Bass and the features can be used The following descriptions are step by step circuit analyses of the Bass Generator Board for the 5 different modes of operation Refer to Figures 3 4 and 5 EXAMPLE 1 MODE 1 Assuming that pedal 2 CH is depressed and the bass tab is set for 16 the following operation occurs The activation pedal 2 C transfers a logic 1 ground potential to J503 pin 2 of the Bass Generator Board This logic 1 grd passes through the matrix diode D6 and reaches the D7 input of priority encoder IC2 at pin 4 The logic 1 grd at J503 pin 2 also changes the bass select data buss R and the keydown data buss S from a logic 0 14V to logic 1 grd With a logic 1 grd applied to the D7 input of IC2 the output pin 15 of 1 2 falls from a logic 1 grd to a logic 0 14V This transition disables
78. pacitance of the diode increases and the oscillator frequency VIBRATO Eas OSCILLATOR Since the cathode of the varicap is normally with no 03 04 vibrato at ground potential and the anode is held at 10 by 02 and R9 the capacitance of the remains constant and stability of the oscillator is maintained Capacitor C1 is not part of the tank capacitance but is used to isolate the D C bias on the varicap from the tank circuit L1 with and C4 and the varicap diode oscil at 2 00024 M Hz and RS supplt bias voltage for Q1 The oscillator signal is couple through C5 to buffer amplifier Q2 which drives ICT The tuning is controlled at J203 2 from the varying voltage 0 to 14V on the tuning potentiometer 10 K ohms M D D GENERATOR The top octave note is made from the clock signal coming from 02 by 1 1 from POWER They are supplied the negative D C voltage as that the SUPPLY 80 vibrato oscillator is supplied 27V L C oscillator 10V CONTROL buffer amp IC1 14V is used tor the high frequency by pass bj makin to use the inductance of wire wound resistor and C7 CB C9 P102 2102 are also for by pass VIBRATO VIBRATO MDD GENERATOR BD MG 14A 228 19237 FIGURE 3 7 3 8 ADD 2 MG 14A 228 19231 BLOCK DIAGRAM OF M D D GENERATOR BOARD AND THEORY 3 8A 3 9A ADD 2 CONVERSION PROCEDURE from EF 12A amp MG 4D MG 4B to MG 14A
79. percussion signals is generated Its decay time is controlled by Decay Tab through J702 pin 1 and pin 2 is switched If pin 1 and pin 2 will be connected the decay time is slow and if pin 1 and pin 2 will be not connected the decay time is fast VR2 controls the off point of percussion signals 4706 J708 4707 REPEAT 14V GND 15V GND OUT GND PEDALIN J704 4703 0 GATE ast O Low key Our key ur pull vis 2 aus 4705 ane REPEATor percussions pme a NOTES ges 1 DI THROUGH 04 308 01017 152473 05 337 02007 022 12A 01 THROUGHO3 305 01008 25449368 04 THROUGH 08 305 03023 25100068 QIOTHROUGH 012 305 05005 25300 QISTHROUGH 015 305 03040 2509450 218 04312 219 04212 FIGURE 3 5 PA 33 B 219 04312 GATE 8 PERCUSSION AMP BOARD LAYOUT amp THEORY If an upper manual key is depressed the negative D C voltage is connected to J705 through Repeat Tab and this voltage triggers Q3 Q3 is turned on and charges up C38 or C39 This charging controls the envelope of percussion 3 The third section of this board provides the repeat oscillator The oscillator used is the self running multi vibrater type Q15 is normally off and the is stopped upper manual key is depressed the negative D C voltage is connected to the base cf O15 through J703 and Q15 is turned on and the oscillator runs This output of osc is connected J705 pin 3 through the Repe
80. refully raise panel and gain access to reverb assembly LOWER SECTION 2 14 2 15 2 16 2 17 EXPRESSION PEDAL ASSEMBLY Remove four 4 nuts fastening base of Assembly to Lower Section b Lift out c To remove pedal from the metal base Rubber mat of pedal can be removed by lifting edges of mat Mat will lift and peel off d With mat removed remove four 4 screws holding metal pedal to Base Section and separate Reassembly in reverse procedure TO REMOVE LOWER SECTION COVER a From under side of Lower Section Remove ten 10 phillips screws b Cover will lift off POWER SUPPLY ASSEMBLY a Remove cover as stated in Step 2 15 b Remove four 4 nuts fastening amp to wood base PEDAL KEYBOARD ASSEMBLY a Remove six 6 nuts and washers mountirtg keyboard assembly to wood base b Pedal assembly will lift off c Contact switch assemblies can be removed by loosening screws at each end of switch module and slide away from screw and lift up Reassemble in reverse procedure A SCREWS FOR LOWER MANUAL ASSY UPPER MANUAL SCREW SCREW FOR LOWER MANUAL ASSY FIXING SCREWS FOR UPPER MANUAL ASSY FIXING UPPER MANUAL SCREWS POWER SUPPLY SCREWS SCREWS FOR TOP PANEL ASSY 6 LONG FIGURE 2 1 23 TEST AND ADJUSTMENT PROCEDURES X 5 18050K 1 Depress Tab or Oscilloscope Step Test amp Test Point Extend Tone Bar Play Keys Adjust or Other ind Fi
81. rom DV 4 B Generator Board are input on terminals T10 T12 T14 T16 T18 T20 T22 T24 T26 T28 T32 and T34 The Pedal Keys are connected on the terminals T9 T11 T13 T15 T17 T19 T21 T23 T25 T27 T29 T31 T33 and T35 The terminal T35 is for common key This Pedal Keyer assembly is wired with High Note Select and 1 contact of key connected to common This section is illustrated by only one note the other notes are all as same If Pedal key is depressed the terminal T9 is connected to the common T35 and the capacitor C1 is charged up through resistor R27 The current through R27 switches transistors Q1 and 02 to turned on and discharges all capabilities of capacitors through diode D1 D3 and D25 before the capacitor C1 will be charged up This envelope of the discharging capacitors through D1 and R33 or R33 and R31 added through String Bass Tabs in Lower right hand End Block provides the envelope of the sustain The clock is gated by D2 and amplified by Q4 and 1 1 and this signal is divided by flip flop of 05 and O6 But if the T7 and T8 are not connected through Pedal Tab 8 16 the flip flop is not operated These amplified and divided signals are gated on D28 and D29 by the D C voltages amplified by 03 The decay time of the Sustain envelope is controled by VR2 Next those gated signals are amplified by 07
82. s LI AE AN DB nee s Le 83 TO J708 P708 OSLENE Y PA 33IBI GATE amp PERCUSSION AMP BOARD 219 04312 FIGURE 3 2 LOGIC DIAGRAM 2 2 9 271 MAIN AMP BOARD 218 0231 INPUT EXT SPEAKER OUTPUT NEON PL 24 IFOR LESLIE 825 MAIN AMP UNIT 105 07402 P901 J901 P102 J102 2 202 9 PLUG EXPRESSION PEDAL 9PSOCKET MULTI CONNETOR O20 io nan IO LINE OUT 30 40 xr INPUT P801 5J801 LEVEL 9 A VOLUME REVERS POWER SWITCH AC 120V 31502 65 1580 9240 0 0 6 1 DV 4 B RC LIST CAPACITORS 401 C95 96 015 C80 thru 84 39 thru 94 022 C10 thru 12 75 thru 79 85 thru 88 027 C8 9 34 thru 36 73 74 108 119 120 033 C5 thru 7 31 thru 33 104 thru 107 113 thru 118 039 C1 thru 4 29 30 101 thru 103 112 047 C25 thru 28 98 thru 100 109 thru 111 056 C58 thru 60 97 130 thru 132 141 thru 144 068 C55 thru 57 127 thru 129 137 thru 140 082 C53 54 124 thru 126 134 thru 136 0 C49 thru 52 121 thru 123 133 150 thru 156 162 thru 169 NOTES All capacitors are in microfarads 50 volts All resistors are in ohms M
83. t 2 1 22 DISASSEMBLY CONTINUED 2 10 2 11 2 12 2 13 PRINTED WIRING BOARDS REMOVAL a The removal of PWB Assemblies is quite obvious and will not be necessary to describe TO REPLACE UPPER OR LOWER MANUAL KEYS a Follow Steps 2 2 thru 2 3 Upper Manual and thru 2 5 Lower Manual b Remove several locking 5 Springs holding plastic covered rod in area of key or keys to be replaced c Remove key spring from rear of key channel d Lift rear of key channel slightly and in a forward motion carefully remove key and channel assembly from manual In the removal of sharp black keys it will be necessary to remove neighboring keys Reassemble in reverse pro cedure c NOTE Key contact adjustment can be made by turning most forward screw on key and channel assembly in or out for key depth POWER SUPPLY a Follow steps 2 2 thru 2 3 b Remove six 6 screws fastening cover above power supply assembly Remove cover c From under side right rear of Upper Section remove four 4 screws See Figure 2 1 for location d Carefully unplug and lift assembly out ACCESS TO REVERB UNIT Follow Steps 2 2 thru 2 3 b Remove six 6 screws fastening cover above power supply Remove cover c Remove two 2 screws and fasteners hold EF 12 PWB d Remove four 4 screws fastening MG 4 PWB to hinged panel Carefully unplug and remove e Remove four 4 nuts and washers from rear of swing panel f Ca
84. t for 16 J506 pin 1 receives no input from the 16 8 tab Therefore transistor 05 becomes self biased and produces a logic 1 grd at its collector This logic 1 grd is applied to pin 5 of IC12D Because both IC12B pin 5 and IC12A pin 1 are held to logic 1 grd levels 1 12 and 1 12 pass the inverted low bass and medium bass Cf signals to the envelope gates of 1 14 pin 2 and 1 14 pin 5 respectively IC12D cannot pass the high bass frequency to 1 14 because 1 13 is holding pin 13 of IC12D to a logic 0 14V level NAND gates IC14A and 14B cannot pass the low and medium bass frequen cies until envelope generator Q4 sends logic 1 grd gating pulse to their input pins 1 and 6 The generation of the logic 1 grd gating pulse begins at the keydown data buss S When any pedal is depressed a logic 1 grd appears at the keydown buss which is felt at pins 12 and 13 NAND gate IC14D IC14D inverts the logic 1 grd to a logic 0 14V and sends this level from pin 11 to the base of transistor Q3 refer to schematic of Bass Generator Board Transistor Q3 turns on with the application of 14V on its base As Q3 conducts it immediately charges capac itor C3 and forces transistor Q4 into conduction as well With transistor Q4 conducting a load is applied to resistor R11 which forces the junction of R11 and R12 to rise from 14V to 7V The is reduced by three 560K resistors before be
85. tage drop across the Q1 by VR1 A 04 05 quiescent current of approximately 100Ma is necessary to prevent crossover distortion then this current determines the voltage drop across R12 or R20 and the voltage is approximately 35 Mv The quiescent current must be determined by adjusting VR1 to clockwise completely and then counterclockwise to achieve 100Ma Transistors Q2 and Q4 O3 and O5 are Inverted Darlington connected O2 and O4 is like a NPN transistor Q3 and Q5 is like a PNP transistor RC pad R18 and C8 across the load provides high frequency stabilization C7 is high frequency compensation of second stage amplifier and C3 is high frequency compensation of overall amplifier FIGURE 3 10 30W POWER AMP MODULE 218 02311 LAYOUT amp THEORY 3 11 4 3 m 5 4 PA 33 B 219 04312 GATE amp PERCUSSION AMP BOARD This board will be described in three sections Section 1 will be the Gate Amplifiers for Upper Manual and Lower Manual Section 2 will be the Voltage controlled amplifier for Percussion and Section 3 will be the repeat oscillator for the percussion 1 The signals is applied to J701 from Presets Tabs in Lower left hand End Block The signal of Upper Manual included Percussion comes pin 1 of J701 and the signal of Lower Manual comes pin 5 of J701 These signals are amplified by Q1 and O4 or O2 and Q5 and these amplified signals are normally grounded by Q10 or Q11 and then if Manual K
86. then counterclockwise to achieve 100Ma FIGURE 3 10 30W POWER AMP MODULE 21802311 LAYOUT amp THEORY 3 11 244 SABA s 5 Suae axs u 5 sh PD S tuh ET p 3184 Lo 40 a T a 244 W T 4 n buh AN 422 GH y wgs Wee 1 2 1 27 q Eu aS E a AN h al 4 lt bth 12 7 bey 4 d 5 a ns 2193 LL L i pups ipm eum cq ems Highest input number is let through hopik Lov Vend gt icg 2 Qt 02 lc 15 1 HEH 22 65 E 5 3 4 5 2 5oy gt 503 5 5 55 5 505 6 505 7 504 Z 3 Soy 4 Soy 5 Sor 4 st gt nm m 4 4 D EI must be 1 to let data P out on Qx 1 s 52
87. uals provide means of switching signals from 229 20316 Generator Board and keying voltage to the 219 04312 Gate amp Percussion Board The lowest one of these contacts is used for switching voltage for Gate amp Percussion and Others are used for switching the signal directly TONE BARS Three Groups of Tone Bars complement the Upper Manual Pedal and Lower Manual They carry the footage markings and vary loudness PRESETS OR TAB VOICING The three 3 Presets Tabs may bring in pre set tones instead of the setting of the upper Tone Bars And the One 1 Preset Tab may bring in those of lower Tone Bars 1 7 1 8 They may be used individually The presets have the following Tone Bar structure Lower Tone Bars Preset Ensemble 068666 444 Upper Tone Bars String 008888 666 Full Tibias 806808 006 Theater Brass 848868 666 Depression of either Preset Tab disconnects the setting of the Tone Bars and all Tabs turn to position and restore the Tone Bars On Upper Presets the right hand Tab has priority over the left hand Tabs The Tabs used are of the current switch type The Preset Tabs are located on the lower left hand End Block Assembly The End Block also contains other Tabs whose functions are the following Percussion Second Harmonic Third Harmonic Decay Repeat Vibrato and Leslie Acoustic Tremolo PERCUSSION Percussion Tones are switched on by the Tabs which are Second Harmonic and Third Harmonic Each
88. vailable at ICI2D the sand highest frequency medium 3 is available at ICI2A and the lowest CH frequency low bass is available at IC12B The NAND gates of 1C14 however will not pass the low medium or high bass signals unless pins 5 1 and 13 receive logic 1 grd levels To determine if these inputs exist we must examine the operation of octave select circuitry IC13 and transistors 05 and Q6 Because the C pedal is within the group of pedals 1 through 5 both the keydown data buss S and the bass select data buss R are held at logic 1 s grd during pedal down 1 13 NANDS these two logic 1 s grd levels This forces a logic 0 14V at pin 11 of D IC13C then NANDS the logic 0 14V from IC13D with the logic 1 grd from the kedydown buss produc ing a logic 1 grd output at pin 10 Now the logic 0 14V from IC13 pin 11 and the logic 1 grd from IC13 pin 10 force flip flop IC13A 13B to produce a logic 1 grd at pin 3 and a logic 0 14V at pin 4 The output from pin 3 is applied to transistors Q5 and Q6 and the output from pin 4 is applied to IC12D With the 16 8 tab set for 16 mode normal J506 pin 2 of the Bass Generator Board receives 14VDC logic 0 This potential is inverted by tr istor Q6 Thus both the inputs of 06 and hold IC12A pin 1 to a logic 1 grd level Refer to schematic of Bass Generator Board Also because the 16 8 tab is se
89. vider Generator Board FIGURE 3 12 MDD BUFFER BOARD 223 35341 LAYOUT amp THEORY 3 13 lt D 18050K FRONT VIEW 42 TOP SECTION OF ORGAN FRONT VIEW 4 3 TOP SECTION OF ORGAN BOTTOM VIEW 4 3 TOP SECTION OF ORGAN BACK VIEW 4 4 LEG ASSEMBLY 4 4 LOWER SECTION OF ORGAN FRONT VIEW 45 LOWER SECTION OF ORGAN INSIDE VIEW 4 5 TOP SECTION OF ORGAN INSIDE VIEW OF TOP UP 4 6 BAR ASSEMBLY 4 6 SECTION OF ORGAN INSIDE VIEW OF UPPER MANUAL ASSEMBLY UP 4 7 POWER SWITCH VIEW 4 7 END BLOCK ASSEMBLY VIEW LOWER RIGHT 4 8 END BLOCK ASSEMBLY VIEW LOWER LEFT 4 8 END BLOCK ASSEMBLY BOTTOM VIEW LOWER RIGHT 4 9 END BLOCK ASSEMBLY BOTTOM VIEW LOWER LEFT 4 9 POWER SUPPLY UNIT VIEW 4 10 POWER SUPPLY UNIT BOTTOM VIEW 4 10 30W MAIN AMPLIFIER 4 11 MANUAL ASSEMBLY 4 312 PARTS LIST PWB MDD BUFFER BD EF 12 4 13 MDD GENERATOR MG 4E 4 13 DIVIDER GENERATOR DV 4B 4 13 PEDAL BOARD 58 58 443 TONE BOARD TG 15B 4 14 GATE AND PERCUSSION 338 4 14 POWER SUPPLY BOARD PS 5B 4414 56 4 14 MAIN AMPLIFIER PW 27B 4 14 42 MUSIC PANEL ASSY ML 2 234 15201 7 STUD 401 05101 LOWER SECTION ASSY 105 09209 18050K FRONT VIEW z A UE xh 4 TOP PANEL 402 07111 POWER SWITCH 301 08006 PIPE LEGS ASSY TOP PANEL PANEL HOLDER 402 07111 S

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