Service Manual - MiniDisc Community Page
Contents
1. 2785 Dw m m DIGITAL 33 SENSOR 2050 REP2786A S 20508 AS 2786 REP2786A S W ELECTRICAL PARTS LOCATION reno Lo no to ta vo reine ua BISENSOR PC B OPERATION 1 C801 5D C802 4D C805 5C C806 5C C807 5C HEADPHONE 2D JK801 C803 2E 2 R805 C804 2E 3E 8806 C808 2D 34 POWER SWITCH P C B VR851 _ REC LEVEL 2786 5 295041 2786 5 POWER TRANSFORMER I ELECTRICAL PARTS LOCATION H OPERATION 2 P C B VR851 20 CN804 2C 902 2 903 28 5903 2 llPOWER SWITCH ss 8 POWER TRANSFORMER P C B 220 230V 50Hz E EG 230 240V 50Hz EB2. REP2787A P 35 12 Type Illustration of ICs Transistors and Diodes RN5RG33AA TL AN8772FHQ 48PIN BA4560FE2 AK4518VF E2 RN5RZ26BA TR MN101D03DAA1 80PIN LB1650MS TM MN66616RA4 100PIN 10PIN 5 5218 4 1 2 3 No 1 TOTAHGTOGAFLTIaPI TC7WO4FTE12L S81233SGY Z TC74HC4050EL 16 8 TC9246FELP 1 2 BAO5ST V5 28J278MYTR 2881295 6 2SD1450RSTTA 25 1764 25 14628 DTC114YETL L 5 C 5 DTA114ESATP 258123808 6 1SS291TA MA728TX SC80209TE12R DTA143ESATP 2SB1240QRTV6 DTC114ESATP 2501862 6 Cathode Cathode Cathode Ca Ca A Anode P Anode x Anode A 4051 04 188254 SLR325MCT31 MA4270HTA 4056 2 SLR325VCT31 MA4062MTA ae 4091 _ Cathode Cathode Cathode Cathode Ca Anode p Anode Cathode A A Anode Anod Anode S e Ca ILLI 36 SJ MD150 13 Wiring Connection Diagram POWER SWITCH B T201 POWER TRANSFORMER POWER TRANSFORMER CP6 M1 SPINDLE MOTOR c 7
3. W ELECTRICAL PARTS LOCATION Face Retna Ret No owe ia No ete nete SERVO P C B SIDE B 31 55 18704 REP2575A W ELECTRICAL PARTS LOCATION SWITCH P C B 2F 54 2F 87 20 2 5 8 3D 2E 56 CN6 2E 8 FL P C B REP2786A S 32 I ELECTRICAL PARTS LOCATION BMANROB O _ BMAIN P C B RN
4. Ref No Part No Part Name amp Description Pcs Remarks Ref No Part No Part Name amp Description Pcs Remarks CN251 RJSAT6ZA CONNECTOR 4P 1 1201 02 SLOQX400 D COIL 2 CN301 898146606 CONNECTOR 6P 1 L501 EXCELDR35V corr 1 CN401 RJS1A6820 CONNECTOR 20P 1 1502 ELEXT5R6KA corr 1 lt MAvD gt CN402 RJS2A3330M 30 1 1601 EXCELDR35V COIL 1 CN711 RJS7T4ZA CONNECTOR 7P 1801 02 ELEXT3R3KAO4 COIL 2 lt MAvD gt CN751 RJTO29WO6VT CONNECTOR 6 1 CN801 RJS7T72A CONNECTOR 7P 1 P1 RPG4856 PACKING CASE i lt mavp gt CN802 8120579004 4P 1 2 RPF0139 PROTECTION BAG 1 CN804 RJTO29W006 1 CONNECTOR 6P 1 P3 SPP730 PROTECTION COVER 1 CN901 RJS1A6220 1 CONNECTOR 20P NE P4 150 CUSHION 1 lt gt CP6 RJT113W10M 10 1 CP802 RJTO57W004 1 CONNECTOR 4P 1 SC80209TE12R DIODE 2 MA728TX DIODE 1 MA728TX DIODE 1 1D3 E DIODE 7 MA4270H DIODE 1 Iu or 2 d Q1 28B1295 6 TB TRANSISTOR 1 DIM 02 DTCll4YETL TRANSISTOR 1 28B14628TX TRANSISTOR i 4062 DIODE 1 A 95 2SB1295 6 TB TRANSISTOR 1 56 DIODE 1 06 DTC114YETL TRANSISTOR 1 nr 010 28J278MYTR TRANSISTOR 1 911 28 1764 TRANSISTOR 1 MAGOSIM DIODE 1 013 28B1121ST TD TRANSISTOR 1 DIODE 2 0301 02 2sD1
5. 59 Ref No Part No Part Name amp Description Pos Remarks No Part No Part Name 6 Description Pcs Remarks ERJ3GEYJ272V 1 16W 2 7K 8301 02 ERDS2FJ183 1 4W 18K 2 ERJ3GEYJ183V 1 16W 18K R303 ERDS2FJ1R2 1 4W 1 2 1 ERJ3GEYJ273V 1 16W 27K 304 05 ERDS2FJ681 1 4W 680 2 ERJ3GEYJ333V 1 16 33K R306 ERD2FCG100 1 4W 10 1 A ERJ3GEYJ223V 1 16w 22K 8307 ERDS2FJ182 1 49 1 8K 1 ERJ3GEYJ102V ERDS2FJ221 1 4W 220 1 243 ERJ3GEYJ222V ERDS2FJ103 1 4W 10K 2 R44 ERJ3GEYJ223V ERD2FCJAR7 1 4W 4 7 2 ERJ3GEYJ333V ERDS2FJ681 1 4W 680 2 ERJ3GEYJ222V ERDS2FJ271 1 aw 270 2 ERJ3GEYJ473V i ERDS2FJ102 1 4W 1K 2 ERJ3GEYOROOV JUMPER 172 ERDS2FJ681 1 4 680 1 ERJ3GEYJ102V 1 16W 1K 1 ERDS2FJ101 1 4W 100 1 ERJ3GEYJ332V 1 16W 3 3K 1 ERDS2FJ221 1 4w 220 1 223 1 16W 22K 1 ERDS2FJ101 1 4W 100 1 1 16W 6 8K 1 323 24 ERDS2FJ222 1 4W 2 2K 2 ERJ3GEYJ683V 1 16W 68K 1 R325 26 ERDS2F3103 1 4W 10K 2 R60 ERJ3GEYJ332V 1 16W 3 3K 1 R327 ERDS2FJ1R2 1 4W 1 2 1 R61 62 ERJ3GEYJ223V 1 16W 22K 2 R401 03 ERDS2FJ103 1 4W 10K 3 ERJ3GEYJ103z 1 16W 10K 1 R404 ERDS2FJ271 1 4W 270 1 ERJ3GEYJA71V 1 16W 470 3 R405 ERDS2FJ103 1 4W 10K 1 ERJ3GEYJ102v 1 16W 1 R406 ERDS2FJ271 1 4w 270 1 ERJ3GEYJ102V 1 16W 1K 1 R407 ERDS2FJ102 1 4W 1K 1 ERJ3GEYJ220V 1 16W 22 2 408 ERDS2FJ271 1 4W 270 1 R73 ERJ3GEYJ393V 1 16W 39K 1 409 11 ERDS2FJ102 1 4
6. 25 SCHEMATIC DIAGRAM 9 MAIN CIRCUIT DIGITAL D715 158254 4 703 2 0454 49 5V Eg D716 Q454 455 188254TA 0 b DTA143ESATP dium POWER SUPPLY Q V K7 IN2 2 0455 7 5 3 P 8 1 3 lt e JK702 OUT 4 9V 2 1 30 6V den 0318 GND 1 1 188291TA 80 re B 2 6 4 SELCONT2 7 wen SELCONTI To FL CIRCUIT csse 00 E CN901 REQPS F on SCHEMATIC sysnsr 2 A DIAGRAM 8 ACDET 2 H LOADSW 14 PUE EET MER MUTE 6 a ee ee i 1 17 4 PONT fig L DATAPS 09 M 55 VREF 1 KEY1 2 0401 403 114 5 SWITCHING LED3 6 RX 7 F lt au N m 9 357 MK DENEN ve MC BEE ol Se a Sons T CIRCUIT CNA lt T 5V DIAGRAM 6 LOAD SW T L 5V 19 D 3 3V 29 M 5V 21 V sws 2013 W 23 M GND ea C40 SDAR 6 3 3V 26 POSITIVE VOLTAGE LINE NEGATIVE VOLTAGE LINE gt MD RECORDING SIGNAL LINE MD PLAYBACK SIGNAL LINE 401 1 402 TC74HC4050EL INTERFACE AIC304 S81233SGY Z REGULATOR OUT GND TC74HCT7007A fen A B D o F K R M T gt Y 5V SCHEMATIC DIAGRAM 10 gt
7. 1 Operation key signal input 93 104 4 1 Operation key signal input 94 PTOS AN3 Not used connectedtoGND_ 95 2 2 Not used connected to GND 96 101 1 Not used connected to GND 97 AVg GND terminal 98 P100 ANO Not used connected to GND 99 VREF Reference voltage input 100 1 Power supply terminal 53 17 Measurements and Adjustments Note Because this unit uses the optical magnetic recording the unit outputs over 10 times more laser than a CD player does In adjustment mode the laser is always being output Therefore be especially careful not to look laser beam directly or to touch the laser beam when adjusting the unit and checking its operation 17 1 Necessary instruments Laser power meter LE8010 Test disc Pre mastered disc RFKV0006 RFKV0014 Recordable disc available on sales route with music recorded Insulated driver for adjustment such as a ceramic driver Extension cable kit RFKZJMD100EK Remote control transmitter 17 2 Set to the unit to adjustment mode 1 the power ON 2 With no MD loaded in the unit press and hold the STOP button for at least 2 seconds And then while still pressing the STOP button press the F SEARCH button for at least 2 seconds The unit is set to the self diagnostic function and is displayed MD TEST Refer to Fig 17 1
8. 229522 am 7 2 MD SERVO xis 27 TRAVERSE 2 M3 AN LOADING MOTOR 2 OPERATION 1 37 SJ MD150 14 Block Diagram AN8772FHQ RFDAT NRFSTBY 81 301 29 27 C C gt x lt e E 84 i MD OPTICAL PICKUP 2 SELECT SERIAL amp PARALLEL esse eene SIGNAL CONV GATE 1 F DARK DET RF2 1 1 1 1 1 LI Wikre O 1 25 43 AcLPr2 m ACH 1 GAIN 115 ABGAIN BO 45 AB VREF il co 46 var 48d DO 472 0 1 1 11 91 LASER POWER DRIVE 25 TEMP IN LASER POWER ADJ Q3 POWER SUPPLY 11 TRACKING COIL 1 f ae a FOCUS COIL 13 A voa Y S 2 A BB lt H DIRECTION ET 15 voz lt 9 3 17 lt dis hL 46 18 4 v04 a lt 5 5 E AN8814SB E1 J ra PGND1 PGND2 1 FOCUS TRACKING 7 d EE ee ee
9. 103 100 101 21 AS M x SCHEMATIC DIAGRAM 5 MD SERVO CIRCUIT POSITIVE VOLTAGE LINE MD PLAYBACK SIGNAL LINE 2 gt RECORDING SIGNAL LINE 3 3V 5V lt LEO AIC9 978 S AWHVTUP RNSRZ26BA TR REGULATOR C83 C22 0 1 1000P 14 47 47 Q 58 93 R59 e C70 68K 0 012 lt R58 6 8K 5 C82 R50 E 0 047 1K gs 23 2 0 1 88 gt 12 3 3 3 eo N 48 C ES 5 1 BE 1 3V 2ms 50mV DIV 29 ee I a ee 13 02 TBAL 66616 4 9 E DEE ASGAIN ENCORDER DECORDER 270 K M 1221 22 12 SERVO SIONAL PROCESSOR 1 ______________ 26 E 55 T E O PLAY 3 0V 0 764601 mA ade Fio Me sv __________ ov PLAY 1 1 Ts FA on D 8 MDISY 55 L lt ov ov 3365 8 00 v 2 55 PLAY gay a oms C A S gV M ov 0 ____ 505 1V DIV em Bx 25 690001020302 5 gt R42 gt gt gt as 1 5 2 6V Adv AAA
10. PHONES LEVEL Be 801 802 10801 sooja PLAY OFF REC 5218 gon HEADPHONES To FL CIRCUIT W901 on SCHEMATIC DIAGRAM 8 1kHz 0dB VOLUME CENTER 35 Q301 302 POWER SSI rega 2801450 2250 2739 TRANSFORMER CIRCUIT Q304 DTA114ESATP FLDRIVE 303 25 123805 6 REGULATOR 30 6V p 31 7V JK201 5 220 230V 50Hz MA4270HTA 29 2809 W ELECTRICAL PARTS LOCATION MD SERVO P C B SIDE A 30
11. 2 P IN1 B8 13 12 DATASP IC6 8 INVERTER 0 9 0454 FE n 2 2 Lies OPTICAL c lt lt o ro lt 4 2 IN2 7 ei SWITCH TC74HCT7007A D 1 401 0455 xi 10 02MHz B6 B10 810 33 32 4 11511 52 2 70 69 31 37 lt Nm N o gt gt 3020208 0 5134 2 45 gt gt amp MN101D03DAA1 IC10 SYSTEM CONTROL z 5 ta n 5 gt gt 2 2 5 5 ds s 8 gt 0 2 9 5 gt 2 HY 9 9 QO C Ca gt 60 61 56 55 54 25 24 44 48 7 46 67 11 LB1830MS TLM LOADING 3 MOTOR DRIVE O SSDW SSDR SSCK MDISY SCTSY SGSYNC HFON MSPMDARST 40 B8 4520 1 C601 25 7 ah 20 ADD A CONVERTER 5 8 lt DIVIDER DECIMATION FILTER DATAPS PW DA AD 26 501 49 21 Jem lY 20 2 MN101DFO3DAA a IC10 5 SYSTEM CONTROL 2 5 5 5 aoa B 8 2 tha 95 o O amp SS oO r 8 lt S lt cw 2 5
12. 90 TRCRS 1 Track cross 91 OFTR 1 Offtrack signalinput 2 92 jLaserpowerPWMoupu 93 z External FM clock input Connected to GND via resistor 94 loop filter output 95 EFM reference current 96 O EFM signal output 97 Perms 1 EFMsignalinput 2 51 98 AVpp0 supply terminal 99 0 GNDterminal 0 0 100 TEFSEL Not used open 1 o 4 1 10 MN101D03DAA1 System Control TET Name 1 O DAC reset signal output L rese MES SA DE emphasis signal output L DE emphasis mure Muting signal output Not used open ADRST O reset signal output L reset STBY O RF amp standby control signal output 6 PC O Powersupply control output ________ 7 MSPRST Reset signal output 8 LOAD O Loading motor drive 1 output 9 LOADO Loading motor drive O output Magnetic head current output Test terminal Not used open est detect switch signal input R Disc in detect switch signal input Reflect detect switch signal input Load OPEN detect switch signal input Q N DISC IN REFLEC gt o Load TRG detect switch signal input 17 LOADSW2 Load PLAY REC detect swit
13. Does optical pickup move up and down YES 3 Continued on next page NO 46 Does CN4 pin 18 change from H to L when disc is inserted NO Is output of IC10 pins 13 15 17 and 18 OK YES Faulty S3 54 S5 and S6 Is voltage of IC10 pins 8 and 9 OK YES Faulty IC10 Is voltage output from IC92 pins 2 and 4 YES Faulty 92 Faulty loading motor NO NO NO IC3 pin 18 Voltage alternates above and below VREF 1 3 V Does output of IC3 pin 18 alternate above and below VREF 1 3 V YES Faulty IC3 Is voltage output between IC2 pins 13 and 14 YES Faulty IC2 Faulty optical pickup NO NO VES Faulty loading TRG 87 Su MD150 50 1 TOC read and disc data displayed NO pin 11 16 wen 5 YES 2ms 50mV DIV 2ms 50mV DIV Is there output from NO pins 1 Us 1 For measurements of IC1 refer to the j item 8 5 2 of Operation Checks and Component Replacement Procedures Can waveform of IC1 pin 11 be adjusted so that itis approx symmetrical with a level of 0 1 Vp p 1 Faulty or YES optical pickup Waveform output from NO 32 TP52 1 Is voltage YES output from IC1 NO pins 38 TP44 and 39 16397 YES IC1 pin 29 TP 148 or IC3
14. 128 V 452 R453 D452 DTC114ESATP c12 8v 22K 158254 MUTING CONT d 12 6V z 33 9 0307 z Q308 48 2SD1862QRTV6 2SD2037EFTA REGULATOR REGULATOR 4 2 5 6V ii 30 6V ak m D319 155254 0320 185254 0313 4051 0314 4051 R324 2 2K R323 2 2K Omm OnO 3 ven ee a8 AIC301 AIC303 zx AIC302 7 881 055 5 5 BAOSST V5 85 BAOSST V5 85 C310 REGULATOR 01 REGULATOR 9 1 REGULATOR 9 ence it 28 SCHEMATIC DIAGRAM 12 VOLTAGE LINE om NEGATIVE VOLTAGE mmi MD PLAYBACK SIGNAL LINE gt RECORDING SIGNAL LINE PLAY 6 2V M R72 729 1kHz 0dB mE 10 150 JK701 Q Lch D711 D713 ad 731 55254 188254 1783 c Q703 706 9703 lt b Bor 2SD1450RSTTA MUTING R759 C757 R757 470 26V3 3 220K H 10751 BA4560FE2 BUFFER AMP 5902 wy excite niri S903A REC MODE MONO lt gt STEREO R760 C758 C756 470 25 3 3 2 2 o 1 9 H 1 5 EA FL CIRCUIT d W903 on 9 REC ey DIAGRAM 8 C802 802 10V100 68 2 R804 R01 20
15. 1501 5V 4 8V WE 4 8V ur 48V 0 25 2V DIV 0 24 2V DIV T 0 36 us PLAY C502 1 epee POSITIVE VOLTAGE LINE ma PLAYBACK SIGNAL LINE gt 0 RECORDING SIGNAL LINE PLAY PLAY 1 4 4 7 PLAY REC 48 C607 2200P E ov 0 34 SER 2 5V 2 5V 9 6 5 5 a 21221774 4 L 601 AK4520AVF E1 AID D A CONV DEMO 0 2us 1V DIV 1kHz 0dB COMPUTER INTERFACE 9 501 TC9246FELP CLOCK GENERATOR PHASE 2 24V 2 3V 5 5 R503 C505 L502 10K 1000P 5 64H y 85 581 85 S ag 28 sv j L SY e 27 5 DIAGRAM 11 CIRCUIT POSITIVE VOLTAGE LINE NEGATIVE VOLTAGE LINE MD PLAYBACK SIGNAL LINE C71 R711 715 25 47 560 8 2 mH 2 Ry ES 581 295 r5 09 IC711 4560 2 BUFFER 1kHz 0dB C712 712 25 47 560 D H A Q306 2SB1240QRTV6 D324 REGULATOR R312 103 gay 14 1 4WA 7 AQ451 2SD1862QRTV6 REGULATOR 0305 2SD1862QRTV6 REGULATOR A309 73V 4 tawa7 1 6 8V 5453 TA114ESA R315 R313 MUTING CONT 270 680 12 6V
16. 87 Faulty Is there output from IC1 pin 29 TP148 or IC3 pin 87 OV 2ms 1V DIV NO Is voltage output from IC3 pin 96 NO Is RF signal stable communications between and IC72 OK YES Does IC10 pin 13 change from H to L YES Faulty IC10 Faulty 4 Continued on next page NO NO 47 Is playback possible Is playback sound OK NO Press eject key and remove ROM disc Can RAM disc be inserted Is UTOC read and disc data displayed YES Play track 1 of a previously recorded MD Is playback sound NO YES Insert a recordable MD Is recording possible NO YES Operation complete Is output of YES Faulty audio circuit Faulty IC3 5 IC3 pins 61 65 OK during playback NO To two pages before to UTOC YES Faulty Is shape of magnetic head OK YES Is there output from CN8 TP110 and TP111 YES After TOC is read does traverse move NO NO 48 NO 61 64 320 3 F 16 9344MHz 0 54 1V DIV IC3 pin 62 65 ov ov T 0 364s 63 TH23us See Traverse Operation
17. 7 et the holder ass y and MD mechanism unit at a 60 degree angle and then pull out the holder ass y Holder EE A 2 27 Lock lever pin 24 When installing the holder ass y align the lock lever pin with the main rack slot 1 ue age the magnetic head Step 8 2 Do not onien the set screw in excessive torque The parts may be damaged Step 9 Remove the magnetic head RED0047 1 Boss pread the lugs of head shifter and then release the lugs from boss Step 11 REF base Step 12 elease the 2 claws and then remove the REF base Se the optica Step 13 pickup ass y 4 Remove the thrust spring Step 14 S Md be drive shaft emove t Step 16 Pull out the main shaft NOTE 1 Use care to prevent damage the optical pickup due to the precision construction 2 Do not apply the grease on the lens of optical pickup 3 Do not touch the lens of the optical pickup Step 17 Step 18 T Remove the nut plate spring and nut plate lt gt Nut plate spring lt Nut plate Optical pickup RAF1700A Notice for installing the optical pickup Apply the grease P N RFKXPG641 Optical pickup ass y Step 3 Insert the main shaft into the guide portion B Guide portion B MD mechanism Sub shaft unit Step 1 ass the FPC through the
18. Power button SEARCH butlon Bepe STOP button Fig 17 1 Caution on optical pickup The optical pickup and the magnetic head are structured precisely therefore they are very fragile Be careful not to touch them with the edge of laser power meter The sensor of the laser power meter is a very fine part Be careful not to touch it to the optical pickup lens The focus point of the laser reaches to 180 C Therefore avoid using laser power for a long time because the sensor of the laser power meter may be burned Do not allow the write power to even momentarily reach or exceed 5 5 mW Doing so will result in damage to the optical pickup Do not set the unit to the laser power adjustment mode with the MD loaded Doing so may result in damage to the MD 54 17 3 Laser power adjustment Adjust each laser power read power for reading play and write power for writing record Caution 1 About handling the MD unit magnetic head is precision unit and is very fragile Do not deform it Laser diode in the optical pickup may be destroyed by the static electricity generated in your clothes or body Be especially careful with the static electricity optical pickup is structured extremely precisely Do not subject to the strong impact or shock Do not touch the lens 2 About handling the magnetic head When replacing the magnetic head do not tighten the mounting screw RHD1
19. u Step 2 slot of MD mechanism unit lign the guide portion A of optical pickup with the sub shaft NOTE Take care not to bend the FPC 14 Apply the grease PIN REKXPG641 Step 5 lign the drive shaft bt with the guide portion lt Step 4 Locate the optical pickup to the inner side NOTE Make sure that the drive shaft alignes with the nut plate Drive shaft Nut plate 8 7 Replacement for the belt and loading motor Follow the Step 1 Step 3 of item 8 1 Step 1 x4 Step 3 Remove the MD mechanism unit Step 2 ull out the FFC from the connector 15 Step 5 Unsolder the motor terminals 6 points o Step 4 FPC N Magnetic head Step 6 Remove the 2 FPCs from the connector Connector CN1 FPC Optical pickup NOTE Optical pickup Insert a short pin into the traverse unit FPC borad Refer to Handling Precautions gt for MD unit Short pin MD servo P C B Step 8 emove the connector and then remove the MD servo Step 7 Release the 4 claws Claws Step 10 elease the 2 claws and then lift up the holder ass y Holder ass y Step 9 emove 2 pressure spring from latch Claw NOTE When installing the holder ass y the pressure spring should be latched correctly 11 et the holder ass y and MD mechanism unit at 60 degree angle and then
20. 1 Power supply terminal for driver 10 PGND2 GND terminal 11 vos Tracking coil drive ouput 12 Tracking coil drive output coil drive output 14 VO3 O coil drive output 15 VO2 Traverse motor drive output O motor drive output 1 O Spindle motor drive output VO1 O Spindle motor drive output PGND1 GND terminal 1 supply terminal 1 2PVccl1 11 2PVce output terminal 1 Connected to GND capacitor VREF 1 Reference voltage input IN1 1 Power cut 1 input Spindle motor drive signal input Traverse motor drive signal input 03 o IN2 PC2 IN3 drive signal input Power cut 2 input 26 1 Tracking drive signal input 16 3 MN66616RA4 ATRAC Encoder Decoder Servo Signal Processor yo Function Terminal Name ADIP FM signal input 2 Lens position signal input error signal input Tracking error signal input 5 AS 1 signal input 6 DRMONI 1 Drive voltage monitor input 7 BAT Battery power supply terminal 8 AMONI Servo analog monitor signal output Not used open 9 Reference voltage input ald gt gt gt lt EA m _ ojvojolj ojo co
21. 56 111 rx LOADING MOTOR M TRAVERSE MOTOR EM j Q 12 9 SWITCH CIRCUIT a 2 ommo 09 728 POSITIVE VOLTAGE LINE gt PLAYBACK SIGNAL LINE gt RECORDING SIGNAL LINE oou m IC11 TC74HCTOOAFL NAND GATE Q10 25 278 HEAD DRIVE IC92 LB1830MS TLM LOADING MOTOR DRIVE SCHEMATIC DIAGRAM 2 POSITIVE VOLTAGE LINE ami MD PLAYBACK SIGNAL LINE r gt MD RECORDING SIGNAL LINE PLAY 0 545 0 1V DIV PLAY 0 2V 0 545 SDN M PLAY AS les 0 45V N QS 95 0 548 50mV DIV TP38 TP43 J L E TP56 0 8 n sr IV QV EEE Fi BDO TRCRS 27 H H 5 F2 ned CEA ERE 13 2 2ms IVON pray AS MONST 1g pay V SomV 9 AS GAIN a 3 ams 50mV DIV N AN8772FHQ Y M TPB 7 41 TP39 40 TP42 jaja Q 81815 3 5 58 518 5 8 518 8 55 1000 C56 1000P E P 08 C17 58 DTC114YETL 4 REC DRIVE B 19 SCHEMATIC DIAGRAM 3 MD SERVO CIRCUIT POSITIVE VOLTAGE LINE 112 2 6V 3 3
22. Is output voltage of 101 pin 37 TP35 approx 1 3V 1 NO YES Is voltage NO of IC1 pin 36 2 6 V 1 YES Is voltage Is voltage on both sides of R5 NO NO 9 at least 0 025 V Faulty IC9 of IC9 pin 3 Faulty 2 6 V YES 3 3V YES Is there output from IC3 pin 92 Faulty optical pickup No Faulty IC3 Faulty L5 1 For measurements of IC1 YES refer to the item 8 5 2 of Is voltage of NO Operation Checks and pin 2 left side of R8 Faulty Component Replacement approx 1 9v Procedures YES Is voltage on both sides of R5 at least 0 V No Faulty optical pickup YES Faulty Q1 15 current flowing equal to at least 1 2 times value indicated on pick FPC 2 Faulty optical pickup 2 Indicated value Current equal to that on both sides of R5 divided by 1 0 3 3V ov Faulty IC3 Is output of IC3 pin 92 OK Is voltage of IC1 pin 2 left side of R8 Faulty IC1 Faulty optical pickup 45 ROM RAM Operation Can ROM disc be inserted correctly YES YES of above and below VREF output between IC2 pins 17 and 182 NO Hz3 V L 0V ic10 9 LOAD OPEN SWO 53 NO 2 25 ERSTER Does output IC3 pin 21 alternate 1 3 Vy Is voltage YES Faulty IC2 Faulty spindle motor
23. SCREW XTB3 10JFZ SCREW XTB348JFZ SCREW RHD17021 SCREW RHD17022 SCREW RMCO348 SPRING 0349 SPRING RML0515 HEAD GUIDE RMQ0750 BASE RMQ0751 NUT PLATE T RMS0611 SHAFT RXJ0021 GUIDE RXK0249 CHASSIS RDV0055 BELT 0077 MOTOR 1 0078 MOTOR 2 RMBO548 SPRING RMQ0752 DETECTOR PIN 1 RMQ0753 DETECTOR PIN 2 XQN174C25FZ SCREW XYC2 FF105 SCREW RAF1700A OPTICAL PICK UP XTW2 6S SCREW RHD20053 SCREW RMBO504 SPRING RMG0447 K DAMPER XTN17 6GFZ SCREW RXQ0558 HOLDER 0047 MAGNETIC HEAD 5 EUR645272 UR64EC1987B RJAO043 1C RJA0044 C REMOTE CONTROLLER R C BATTERY COVER AC POWER CORD AC POWER CORD 2 0 RHD30035 Kl SCREW 4 RILIX009B08 OPTICAL CABLE 152 rop CABINET 1 RIL2PO04B08A PIN CORD 2 XTBS348JFZ1 SCREW 1 RQT5409 E OPERATING INSTRUCTIONS REX0945 WIRE ASS Y 1 REZ1159 FLAT CABLE 30P 1 220157 FLAT CARLE 205 i RQT5411
24. continue to press the STOP button M for at least 5 seconds while in the self diagnostic function The memory will clear Always be sure to clear this memory after completing repair the display will MD cannot be loaded MD cannot be ejected Table 6 1 Traverse det switch 58 is defective Check and replace if necessary Communications error between the servo processor IC and the microprocessor IC system control Check if the flexible circuit board is disconnected Displayed when the disc is scratched too Confirm that the disc is not catching on anything The connection flexible circuit board or connector cable between the MD unit and the MD servo circuit board is disconnected or damaged check and replace if necessary The MD unit may be malfunctioning replace it Confirm that the disc is not catching on anything The connection flexible circuit board or connector cable between the MD unit and the MD servo circuit board is disconnected or damaged check and replace if necessary The MD unit may be malfunctioning replace it sequentially show the respective error codes each time the SEARCH button is pressed Power button STOP button _ button gt gt 7 Self Check Function This unit is equipped with self check function which can detect a part of malfunction Use this self check function before
25. next page Faulty magnetic head is output of IC3 pin 73 OK 3 3V ov NO YES 4 Faulty magnetic Faulty magnetic head Faulty IC3 Traverse Operation Traverse operation Remains at outer track Remains at inner track Is IC10 12 approx 0 V Faulty shorted traverse detection switch S8 Is IC10 pin 12 approx 3 3 V Is output of IC3 pin 20 OK Faulty traverse detection switch S8 Faulty Is voltage output between IC2 pins 15 and 16 Faulty traverse motor Faulty 2 49 16 Terminal Function of ICs 16 1 AN8772FHQ RF Amp CENVD 1 signal detection input LDO amp output terminal Function APC PD Photo diode detection input LD IN LD amp input APC amp reference voltage input Temperature sensor amp input O sensor amp output O FM signal output Tracking error off set adjustment input 1 Tracking balance adjustment signal input Tracking error signal output LNP Lens position signal output jAPP signal gain adjustment input 16 FE O Focus error signal output 17 AS adjustment input FBAL __ Focus balance adjustment input 19 AS MONST signal output O oO CEA envelope detection input BDO Track cro
26. servicing the unit and check the item as shown below 7 1 Setting to the self check function 1 Turn the power ON 2 With no MD loaded in the unit press and hold the STOP button for at least 2 seconds And then while still pressing the STOP button W press the SEARCH button lt lt for at least 2 seconds Then the unit is set to the self check function the FL display is turned off Refer to Fig 7 1 Power button SEARCH button lt lt STOP button liil Fig 7 1 7 2 Checking the operation buttons When the unit is set to self check function press the operation buttons on the unit except the POWER button POWER It displayed mark adapted each buttons Refer to Fig 7 2 and Fig 7 3 about allotment 3 the JOG dial to FWD side 9 Turn the JOG dial to REW side 3 Push the JOG dial Fig 7 2 Fig 7 3 7 3 Checking the FL display All buttons works normally except the POWER button POWER FL display and LED turns on and off at 0 5 second interval Refer to Fig 7 4 and Fig 7 5 DIGITAL RANDO ERASE NDOM T REC e TRACK DISC AUTO SYNCHRO faf 488 88 Fig 7 4 cron y ES Se r LED Fig 7 5 The self check function can be canceled by pressing the POWER button POWER or pressing and hold the STOP button for least 2 seconds 8 Operation Checks and Com
27. 0757 58 ECEALEKN3R3B 25 3 30 2 118 ECUVNALOSKBN 10 10 C759 ECBT1H104zF5 50 0 10 1 119 1 102 50 1000 1 761 62 1 25 3 30 2 C120 ECUV1H560JCV 50 56 1 763 65 1042 5 50 0 10 3 C121 1 102 50V 1000P 1 C766 67 ECEAlEKS4R7 25 4 70 2 C122 1052 10V 10 1 C801 02 1 101 10 1000 2 C123 ECUVNCIOAZFV 16 0 10 1 c803 08 1 103 85 16 0 010 6 C128 1047 16V 0 10 1 C908 ECEA1AKS221 6 3 2200 1 C129 1 1010 sov ioo 1 909 10 1 1042 50 0 10 2 C133 ECUVNA105zrv 10 10 1 911 EcEA1HKs2R2 50 2 20 1 C134 1 31 50 1 912 1 1042 5 50 0 10 1 C138 ECEVOJA470SR 6 3 470 1 C139 42 ECUVNCIOA4ZEV 16V 0 10 4 CN1 RJS2A4526T CONNECTOR 26D 1 C143 ECSTOGY106RR 4 100 1 4 RIS2A4830T CONNECTOR 30P 1 154 55 1 50 2 CN6 RJU113W10M CONNECTOR 10P 1 C301 1 1042 5 50V 0 10 1 CN8 RJS2A4506T CONNECTOR 6P 1 C302 16 10000 1 CN201 RJS1A6604 4P 1 57
28. 2 ERDS2FJ472 1 4W 4 7K 2 ERJ3GEYJ101V 1 16W 100 2 ERDS2FJ103 1 4W 10K 1 ERJ3GEYJ102V 1 16W 1 ERDS2FJ104 1 4W 100K 3 6119 20 ERJ3GEYJ101V 1 16W 100 2 ERDS2FJ472 1 4W 4 7K 1 8121 22 emzseevo272v i iew 2 7K Jej ERJ3GEYJ102V 1 16W 1 8908 12 2 210 3 1 4 15 ERJ3GEYJA73V 1 16W 47K 2 1 ERJ3GEYJ272V 1 16W 2 7K 1 1 ERJ3GEYJ101V 1 16W 100 1 1 ERJ3GEYJ272V 1 16W 2 7K 1 ERDS2FJ152 1 ERJ3GEYOROOV CHIP JUMPER 1 ERDS2FJ182 ERJ3GEYJ272V 1 16W 2 7K 2 R918 ERDS2FJ821 1 48 820 1 ERJ3GEYJ103z 1 16w 10K 1 19 ERDS2FJ102 1 4W 1K 1 ERJ3GEYOROOV CHIP JUMPER 1 R920 ERDS2FJ122 1 4W 1 2K 1 145 46 ERJ3GEYJ221V 1 16W 220 2 R921 ERDS2FJ152 1 4W 1 5K 1 R147 ERJ3GEYJ102v 1 16W 1K 1 R922 ERDS2FJ182 1 4W 1 8K 1 R174 ERJ3GEYJ1032 1 16W 10K 1 R923 ERDS2FJ222 1 4W 2 2K 1 R201 ERJ3GEYJ472V 1 16W 4 7K 1 8925 ERDS2FJ332 1 4W 3 3K 1 ERQ16NKWR1OE 1 6W 0 1 1 5928 29 ERDS2FJ103 1 4W 10K 2 ERJ3GEYJ391V 1 16W 390 i ERDS2FJ104 1 4W 100K 1 1 8933 82 2101 1 4w 100 1 ERJ3GEYI391V 1 16 390 1 jerpsarsse2 i 4w 5 6K 1 ERJ3GEYJ101V 1 16W 100 1 R937 ERDS2FJ561 1 4W 560 1 ERJ3GEYOROOV JUMPER 4 R938 ERDS2FJ471 _ 1 4 470 1 ERJ3GEYJ391V 1 16W 390 1 940 44 ERDS2FJ103 i 4W 10K 5 Part No Part Name 6 Description Pcs Remarks RSH1A91ZA A SW PROTECT REFLECT RSH1A044 1A SW LOAD OPEN RSH1A91ZA A SW DI
29. 9 955 95 9398 8 OO 0 20 41 57 58 15 B10 41 BA4560FE2 IC711 BUFFER AMP B3 1 DATASP 75 P95 P83 VR851 REC LEVEL LINE IN N L ch Q703 704 Q705 706 MUTING MUTING LINE OUT 5 R ch 1C801 23 HEADPHONES AMP Q801 802 HEADPHONES nm MUTING PHONES LEVEL HEADPHONES AMP B1 0452 453 MUTING DRIVE lt 89 S901A 902A PLAY OFF REC ANALOG OPT2 1 lt lt gt S903A REC MODE MONO 4 STEREO Q 2 5 9 H amp 4 20 7 26 24 8121 23 27 30 29 28 36 o O O O SS N e N N amp amp amp M30218MAA102 901 SYSTEM CONTROL 5 ER u ul ONNN on 2 x 39 E 8 38386 2 2238 98 Y 16 33 321 31 13 15 18 37 62 74 83 64 66 73 87 88 81 2 Q903 905 X901 iB 10MHz xt B1 FL901 FL DISPLAY 7901 42 D451 PD RENTE B9 lt NOTE mm MD PLAYBACK SIGNAL LINE gt RECORDING SIGNAL LINE ICP301 84 REGULATOR nu D318 Bi 0317 302 D301 304 5 REGULATOR BAOSST V5 1C3
30. elease the 2 claws and then remove the operation 2 Step 5 emove the holder Sensor P C B Step 6 emove the operation 1 P C B Step 3 Step 8 ull out the knob and then remove the nut Knob emove 18 3 claws and then remove the FL P C B 10 8 4 Removal of the power switch P C B Follow the Step 1 Step 3 of item 8 1 Follow the Step 1 Step 2 of item 8 2 Step 1 p emove the 2 screws and claw and then remove the power switch P C B 8 5 Checking for the MD servo P C B 8 5 1 Checking for the MD servo P C B A side Follow the Step 1 Step 3 of item 8 1 Step 1 T Check the MD servo P C B A side as shown below MD servo P C B A side Step 2 aise the MD mechanism unit 11 8 5 2 Checking for the MD servo P C B B side Two mathods for checking servo P C E B side are as follows with test points on the side of 2 check the whole of MD servo P C B B side with connecting ihe extensson cable 1 Test pointe checking of MO servo side IM S Iesu T ____ BDPIN Tba wawvatonma the schema diagram 2 Checking for the whole of MD servo P C B side with connecting the extension cable Extension cable kit RFKZJMDEK Step 6 Helease the 4 claws 1 piece I
31. for the MD servo P C B 8 6 Replacement for the magnetic head and optical pickup 13 8 7 Replacement for the belt and loading motor 15 8 8 Replacement for the traverse motor en 16 1 Accessories AC power supply cord for E EG areas 9 0043 1 1 pc AC power supply cord for EB area 44 1 Optical fiber cable RJL1X009B058 1 pc Page 9 Schematic Diagram 4 17 10 Schematic Diagram gt 18 11 Printed Circuit Board Diagram en 30 12 Type Illustration of ICs Transistors and Diodes 36 13 Wiring Connection Diagram mn 37 14 Block Diagram gt 1 2 38 15 Troubleshooting Guide 88 16 Terminal Function of ICs 16 1 AN8772FHQ RF Amp 16 2 IC2 AN8814SB E1 Focus Tracking Coil Spindle Traverse Motor Drive een 50 16 3 IC3 MN66616RA4 Encoder Decoder Servo Signal Processor M 50 16 4 IC10 MN101D03DAA1 System 51 16 5 72 M51V4400D7FS 4M DRAM 52 16 6 901 M30218MAA102 System Control FL Display 52 17 Measurements and Adjustments 54 17
32. gt gt gt Selm NINO 4419 BCDEFGH 1 22 SCHEMATIC DIAGRAM 6 POSITIVE VOLTAGE LINE ami MD PLAYBACK SIGNAL LINE gt gt MD RECORDING SIGNAL LINE 33v 5V AQ13 2SB1121ST TD REGULATOR 0201 MA728TX 4 AK4518VF E2 2 AD DA CONVERTER 5 REGULATOR S 50 28 SDAP Wikies 27 A 3 3V __ 29 lt SDAR 6 2 1 4 M GND WE pct 22 sws 21 M 5V 30 DEO 201 D 3 3V lt LSV H6 LOAD SW 17 CIRCUIT CN402 on 05 HEAD 5V f SCHEMATIC 5 DWG DIAGRAN 9 ar J LK Pt Tt co 75 REQ IC6 EK TC7WO4FTE12L INVERTER 23 SCHEMATIC DIAGRAM 7 FLCIRCUIT O POSITIVE VOLTAGE LINE NEGATIVE VOLTAGE LINE FL901 RSLO282 F 2902 100K x 11 S907 S901 EJECT SEARCH 44 e 3902 28 SEARCH gt gt 29 L FL DISPLAY a 88 5905 TRACK NS Es CHARA SKIP 2 Er Ag 5906 Er DISP CHARA 2 Er R923 2 2K 2 ID NTMOOHPN lt XE lt CHAHH DO DOZZTRUL gt R925 3 3K Q903 905 DTC114ESATP FL DRIVE 55 T o e 5259 yx
33. of 5 ampere and that it is approved by ASTA or BSI to 51362 Check for the ASTA mark or the BSI mark g on the body of the fuse If the plug contains a removable fuse cover you must ensure that it is refitted when the fuse is replaced If you lose the fuse cover the plug must not be used until a replacement cover is obtained A replacement fuse cover can be purchased from your local dealer CAUTION IF THE FITTED MOULDED PLUG IS UNSUITABLE FOR THE SOCKET OUTLET IN YOUR HOME THEN THE FUSE SHOULD BE REMOVED AND THE PLUG CUT OFF AND DISPOSED OF SAFELY THERE IS A DANGER OF SEVERE ELECTRICAL SHOCK IF THE CUT OFF PLUG IS INSERTED INTO ANY 13 AMPERE SOCKET new plug is to be fitted please observe the wiring code as shown below If in any doubt please consult a qualified electrician IMPORTANT The wires in this mains lead are coloured in accordance with the following code Blue Neutral Brown Live As these colours may not correspond with the coloured markings identifying the terminals in your plug proceed as follows The wire which is coloured Blue must be connected to the terminal which is marked with the letter N or coloured Black or Blue The wire which is coloured Brown must be connected to the terminal which is marked with the letter L or coloured Brown or Red WARNING DO NOT CONNECT EITHER WIRE TO THE EARTH TERMINAL WHICH IS MARKED WITH THE LETTER E BY THE EARTH SYMBOL OR COLOURED GREEN OR G
34. those items of parts marked 61 20 MD Mechanism Unit Parts Location Part No Ref no RFKXPG641 5 lt e e 5 x w a 2 5 8 e gt S 7 d gt s o s Gas ooo 5 2 gt o c 5 5 2 o z Note We do not supply those items of parts marked k 62 SJ MD150 21 Packaging A5 A7 1 1 1 A2 For E EG areas 63 000300000
35. wenn folgende Punkte beachtet werden 1 Die Lasereinheit nicht zerlegen da die Strahlung an der freigelegten Laserdiode gef hrlich ist 2 Nicht mit optischen Instrumenten in die Fokussierlinse blicken 3 Nicht ber l ngere Zeit in die Fokussierlinse blicken CLASS 1 INVISIBLE LASER RADIATION WHEN OPEN AVOID DIRECT EXPOSURE TO BEAM USYNLIG LASERSTRALING VEO BNING NAR SIKKERHEDSAFBRYDERE DANGER Inside of product LASER PRODUCT ADVARSEL ER UDE AF FUNKTION UNDG UDS TTELSE FOR STERLING Indersiden at apparatet AVATTAESSA JA SUDJALUKITUS OHITETTAESSA OLET ALTTIINA PTT VARO MAKYM T NTA LASERGATEILYLLE KATSO SKTEESEEN Tuotteen sis ll OSYNLIG LASERSTRALNING NAR DENNA DEL AR PPNAD OCH SPARREN AR URKOPPLAD BETRAKTA EJ STR LEN ADVARSEL USYNLIG LASERSTRALING NAR DEKSEL APNES 06 SIKKERHEDSLAS BRYTES UNNG EKSPONERING FOR STR LEN RSICHT UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GE FFNET vo NICHT DEM STRAHL AUSSETZEN Apparatens insida Produktets innside Back of product Im Inneren des Ger tes 4 Caution for AC Mains Lead For United Kingdom EB area code model only For your safety please read the following text carefully This appliance is supplied with moulded three pin mains plug for your safety and convenience 5 ampere fuse is fitted in this plug Should the fuse need to be replaced please ensure that the replacement fuse has a rating
36. 01 B6 REGULATOR 81233SGY Z 12304 RN5RG33AA TL B7 REGULATOR 810 REGULATOR RNSRZ26BA TR Q13 BAOSST V5 1 303 g 88 REGULATOR 6 120 2 AC IN 2 tr 5 0305 0309 310 a 83 REGULATOR REGULATOR FL DRIVE D324 NE I 22 F1 To FL DISPLAY REGULATOR Q303 REGULATOR D305 308 301 302 B2 17 89 5 901 M30218MAA102 Q 2 B1 SYSTEM CONTROL DRIVE 0904 Y 9902 LED S D903 4 B2 KEY MATRIX JOG SW 8901 913 VR901 4B1 43 15 Troubleshooting Guide Power ON with no MD loaded 1 1 Refer to Measurements and Adjustments Does player enter adjustment mode 1 NO CN4 sv 0 sv 59 21889 YES Set to read power adjustment mode 1 Is CN4 power supply line OK YES Check power supply circuit on main unit Is oscillation signal input for IC10 pin 32 NO NO Is read power output 1 10 pin32 YES L Continued on next page YES F 10 02MHz Can read power be set to 6001 or lower using VR1 YES Set to write power adjustment mode 1 Faulty optical pickup NO Is CN4 pin 14 Is write power output YES 2 Continued next page check ROM laser Faulty IC10 Check reset SN power and RAM data on main unit laser power To ROM RAM Operation
37. 010 1 1042 16V 0 10 1 C329 1 470 16 470 1 1052 10V 10 2 330 ECEAOJKS101 6 3 1000 1 ECUV1H332KBV 50 3300 i C331 1 103 85 16V 0 01U 1 ECUV1H102KBV 50 1000P 4 332 ECEA0JKS220 6 3v 220 1 ECUVICB23KBV 16 0 0820 1 C333 ECEA0JKS101 6 3 1000 1 ECEVICA100NR 16 100 1 C334 102 6 3 10000 1 ECUVOJ334KBV 16 0 330 1 C335 ECEA0JKS470 6 470 1 ECUV1H221KBV 50 220P 1 C336 1042 5 50V 0 1U 1 ECUVNE153KBV 25 0 0150 1 C337 1 103 55 16 0 010 E 1 104 16 0 10 1 C338 39 1 1042 5 50 0 10 2 ECUV1C823KBV 16V 0 082U 401 02 ECBT1H104ZF5 50 0 10 2 ECUV1H392KBV 50 3900 1 C403 1 47025 50 47 TN 1 123 25V 0 0120 1 C404 1042 5 50 0 10 1 1042 16V 0 19 6 C502 1042 5 50V 0 10 1 79 80 1042 16 0 10 2 503 1 224 3 50 0 220 1 ECUV1H560JCV 50 56 1 C504 1 2230 3 50 0 0220 1 c82 473 16 0 0470 1 C505 102 5 50v 1000P 1 83 84 Ecuvwcioazev 16 oww 2 ceso ECBT1H470J5 50 47 af _ 85 ECSTOGY106RR 4 100 1 C507 1 1042 5 50V 0 10 2 ECUVNE153KBV 25 0 0150 1 C601 EEUPL1H100B 50 100 1 lt gt C87 1042 16V 0 1U 1 C602 ECBT1H104ZF5 50 0 10 1 C88 89 ECUV1H331KB
38. 1 5912 5913 5901 902 S903A VR1 VR801 VR851 PROTECT det switch REFLECT det switch LOAD OPEN det switch DISC IN det switch LOAD PLAY REC det switch LOAD PLAY det switch LOAD TRG det switch Traverse det switch Unit on off switch 0 search switch SEARCH 44 search switch SEARCH gt gt Editing mode switch EDIT Enter switch used in editing ENTER Track mark mode select character skip switch TRACK MARK CHARA SKIP Display mode select character select Switch DISP CHARA Eject switch EJECT Stop switch Pause switch M Playback recording start switch Record switch Synchro record switch SYNCHRO REC Playback mode selector switch PLAY MODE Timer selector switch in PLAY position TIMER Input selector switch in ANALOG position INPUT Recording mode selector switch in MONO position REC MODE Laser power adjustment VR Headphones level VR LEVEL Recording level control VR REC LEVEL 17 VR901 JOG skip dial VR JOG PUSH SET 44 gt gt Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester high impedance with the chassis taken as standard Therefore there may exist some errors in the voltage values depending on the internal impedance of the DC circuit tester No mark MD Stop MD Play MD Rec Important safety no
39. 1 Necessary instruments 8 54 17 2 Set to the unit to adjustment mode een 54 17 3 Laser power adjustment 88 54 18 Replacement Parts List mm 56 19 Cabinet Parts Location 20 MD Mechanism Unit Parts Location 08 62 21 Packaging 1 63 Stereo phone cables RJL2P004B084 2 pcs 7 Remote control transmitter EUR645272 Batteries R6 AA 3 2 pcs 2 Handling Precautions for MD Unit The laser diode in the MD unit optical pickup may break down due to potential difference caused by static electricity of clothes or human body So be careful of electrostatic breakdown during repair of the MD unit optical pickup 2 1 Handling of MD Unit optical pickup 1 Do not subject the MD unit optical pickup to static electricity as it is extremely sensitive to electrical shock 2 To protect the breakdown of the laser diode an anti static shorting pin is inserted into the flexible board FPC board Refer to Fig 2 1 3 Take care not to apply excessive stress to the flexible board FPC board FPC Handle it carefully Shorting pin or Clip Fig 2 1 2 2 Grounding for electrostatic breakdown prevention 2 2 1 Human body grounding Use the anti static wrist strap to discharge the static electricity from your body Refer to Fig 2 2 Wrist strap Anti sta
40. 25 5 5520 55 54 49V RCDGP1U28XD REMOTE SENSOR 3 6V 2901 CR 49V 0904 9902 Sy DTC114ESATP LED DRIVE Q901 GND Voo OUT DTA114ESATP LED DRIVE 24 SCHEMATIC DIAGRAM 8 JM POSITIVE VOLTAGE LINE NEGATIVE VOLTAGE LINE PONMLKJIHGFEDCB ZYXWVUTSRQPO lt U e 5 lt 26V 6 30 6V P38 49 8 2V 99 215 9 25 4 6 00 902 10K 24 2 ov 8944 10K ov R943 10K P45 33 9 V R942 10K P46 82 69 ov R941 10K 1C901 60 P107 AN7 M30218MAA102 P106 ANG SYSTEM CONTROL FL DRIVE A B ov Q913 DTC114ESATP RESET ocoOOmmor czazrzz R912 10K 910 10K R909 10K R908 10K 0 09 2 3V 4 8V 4 8V 287 4 9V 2 87 4 8V II 111 48e GHI ABCDEFGH 2 CDEFGIHCB D AE HGF 4 9V 4 9V A 30 6V MAIN ciRCUIT CN401 on SCHEMATIC DIAGRAM 9 5 8 e e 8 5 2 I W901 Wg03 123 0000 Yr OPERATION 1 OPERATION 2 CIRCUIT W901 on CIRCUIT W903 on SCHEMATIC DIAGRAM 12 SCHEMATIC DIAGRAM 12 MUTE DATASP CLKPS P CONT SELCONT2 DATAPS 5 SELCONT1 NG 55 lt PW DA AD LI 1 lt 2 1 S gt lt 2 al 2 S P X
41. 4 Track mark select button TRACK MARK Recall button RECALL 49 Synchro record button SYNCHRO REC Random play button RANDOM Eject button EJECT Skip buttons 44 skip PP Pause button 11 6 Playback recording start button gt 6 Self Diagnostic Function This unit is equipped with a self diagnostic function which in the event of a malfunction automatically display a code indicating the nature of the malfunction Use this self diagnostic function when servicing the unit 6 1 Setting to the self diagnostic function 1 Turn the power ON 2 With no MD loaded in the unit press and hold the STOP button W for at least 2 seconds And then while still pressing the STOP button press the F SEARCH button BP foratleast 2 seconds The unit is set to the self diagnostic function and is displayed MD TEST Then error code is displayed if any Refer to Fig 6 1 For details of error codes refer to Table 6 1 Caution If more than one error exists Errorcode Symptom Interval till MD starts playing is too long _ is loaded but cannot be played 6 2 Canceling the self diagnostic function The self diagnostic function can be canceled by pressing the POWER button POWER to turn the system off And then pressing the power button to turn it on again 6 3 Clearing the self diagnostic function The contents of abnormality display are stored in memory In order to clear the memory
42. 4508 TRANSISTOR 2 1 82541 77_ 1 1 4 lt gt Q303 123808 6 TRANSISTOR 1 m Q304 DTALIAESATP TRANSISTOR 1 lt mavo gt 9305 28018620 6 TRANSISTOR _ 1 0306 2881240 TRANSISTOR 1 SU m ge 25018620 6 TRANSISTOR 1 A SB n s 12 22 0453 DTA114ESATP TRANSISTOR 1 gt ANB772FBQ ae 0454 55 DTAl43ESATP TRANSISTOR 2 lt gt mus m SO IS as 27 0801 02 28014508 TRANSISTOR 2 0901 114 TRANSISTOR 1 lt mavo gt 258 RNSRGISAA TI IC 2902 05 DTC114ESATP_ TRANSISTOR lt gt TUTWOABTRIAL MIC 1 0913 DTC114ESATP TRANSISTOR 1 lt mavo gt 1 9 RN5RZ26BA TR 1 1010 Sareea Rl ERJ3GEYJA72V 1 16W 4 7K R2 ERJ3GEYJ102V 1 16W 1 1672 M51V4400D7FE IC 1 R3 ERJ3GEYJ472V 1 16W 4 7K 1 FPB1L850MS TIM IC R4 ERJ3GEYOROOV CHIP JUMPER 1 Fr R5 ERJ3GEYJIROV 1 16W 1 1 an i R6 ERJ3GEYJA472V 1 16W 4 7K 1 R8 ERJ3GEYJ271V 1 16 270 1 20402 1 10 ERJ3GEYJ474V 1 16W 470 1 1501 eL 2 11 ERJ3GEYJ101V 1 16 100 1 four re R12 ERJ3GEYJ223V 1 16W 22K 1 R13 ERJ6GEYJ3R3V 1 8W 3 3 1 SOINS 1 SED R14 ERJ3GEYD103V 1 16W 10K 1 R15 ERJ3GEYJ223V 1 16W 22K i IE Lu D R16 21042 1 16W 100K 1
43. 7022 too firmly If the screw is tightened too much to deform the resin the position of the head is moved and this affects its recording operation Recommended torque for mounting screw 700x100 g cm Reference This is the same force as using a screwdriver with a 15 mm diameter grip you fasten the screw naturally with your thumb and index finger 3 About the driver for adjusting laser power Use only insulated driver such as a ceramic driver With the metal driver it is not possible to adjust properly because of induction noise Also if it short circuits with the chassis it may destroy or damage the laser diode Recommended driver VESSEL 9000 1 8 30 Ceramic driver 17 3 1 1 With no MD loaded in the unit press 1 on the remote control transmitter RAM LASER will be displayed to indicate the read power adjustment mode Adjustment Procedure 2 Slide the sensor cover of the laser power meter Refer to Fig 17 2 Fig 17 2 3 Position the sensor of the laser power meter directly above the optical pickup Refer to Fig 17 3 Or load the cartridge of the laser power meter into the MD mechanism Refer to Fig 17 4 SJ MD150 Caution Specified range write power 4 8 mWz0 1 mW Do not allow the laser power Magnetic head Caution meter to come in contact with Do not allow the write power to even momentarily either the optical pickup or the reach or exceed 5 5 mW Doing so will result in magnetic head damage
44. B OPERATING INSTRUCTIONS RHD30053 SCREW 3 1 IB 04082 1 LEG BASE 4 5 RQT5407 D OPERATING INSTRUCTIONS 1 EG RYFO501 Q DOOR UNIT 1 lt MAVD gt RGK1111 K NUT 4 IC RHD26033 SCREW 4 5 RQT5408 H OPERATING INSTRUCTIONS 1 XTS2 4GFZ 8 4 ee DAMPER GEAR 2 6 0117 WARRANTY CARD 1 5902 FRONT PANEL UNIT 7 RQCBO169 SERVICE CENTER LIST alg ROKOS T115 MD HTD 1 1 221 50 220 1 u ger ECUVNALOSZEV 10 10 1 c5 ECUVNA224KBV 10V 0 220 1 RGUO890 1K BUTTON POWER 1 EE 3 FGUL709 BUTTON 1 C7 C8 ECUVNA224KBV 10 0 22U 2 RGUI7I2 K BUTTON OPEN 1 C11 ECUVNE223KBV 25 0 0220 1 BOULIIT S BUTTON PLAY 1 ____ 6 3 0 470 1 RGV0112 S i 2 ECUV1C393KBV 16 0 0390 1 ees oe 2 14 1 102 50 1000P 1 5 C15 ECSTOGY106RR 4V 10U 1 22 RHD20019 SCREW 1 C16 50V 180P 11 23 RHD26021 SCREW 14 C17 ECUVIH332KBV 50 3300P 1 24 BHD26034 SCREW 3 C18 ECUV1H562KBV 507 5600 1 25 ore TERING 19 ECUVNC104ZFV 16 0 10 1 20 ECSTOGY106RR 4 100 1 27 0009 MAGNET 1 21 ECUV1H822KBV 50 8200P _ 1 28 RM0284 SERING i c22 ECUV1H102KBV 50 1000 1 56 Part No Part Name amp Description Pcs Remarks Ref No Part No Pa
45. COIL SPINDLE TRAVERSE MOTOR DRIVE 38 TC74HCTOOAFL L700 MAGNETIC GATE 66616 4 HEAD a M51V4400D7FS DRIVE ATRAC ENCODER DECODER 4M DRAM Vss 526 SERVO SIGNAL PROCESSOR 7 E OPTICAL NEFMON 85 2 5 Z OUT ET 24 25 9 12 7 43 46 30 43 47 48 49 69 78 81 OO ee oe 4 5 3 amp 8 5 DIGITAL 9 OUT 3 74 MONIO 3 EXTERNAL DRAM CHIP CONTROL 2 1 50 MSPMDARST 92 APCD APCREF ssck 52 SSCK EFMMOD EFMDEM EFMPLL 95 EFMIREF O o EFMPLLF ATRAC DIGITAL ECC SPM SIGNAL PROCESSOR CONTROL SELAD INTERFACE SPON 22 SPON Q DIGITAL DIGITAL TRCRS 90 J mons PROCESSOR i 874 O E CD amp ADC DAC INTERFACE SGSYNC DIGITAL IN DIN PLL ASGAIN 14 ASGAIN 1 51 ABGAIN FS REGAN CONVERTER FBAL Q D A CONVERTER EXSYSCK 39 AK4518VF E2 ICA AD DA CONVERTER 25384 9 A MCLK CLOCK B7 16 DIVIDER AINL 4 6 lt DECIMATION AX sws 10 A rek FILTER MODULATOR 24 Q402 403 Switching mE O V y O O o A a N
46. LK PANEL DATA PANEL DATA PANEL CS SELAD 49 PANEL clock signal input PANEL data signal input 5 PANEL I F data signal output PANEL chip select signal output MSP MDA I F address select output H address MSP MDA I F clock output MSP MDA I F read data input MSP NDA write data output LCD clock test signal output Connected to power supply via resistor Test terminal Connected to power supply via resistor 9 CL DR A LCD CK ADRS TEST RXD 02 70 O O TXD VREF Connected to GND TEMP Temperature sensor input KEY 1 Operation key signal input KEY 1 Operation key signal input 64 MOLOAD Test signal input Not used open 65 SRV TEST Test signal input Not used open 66 LOADP signal input Not used open IN 68 SRV LOAD Test signal input Not used open 69 1 Power supply terminal 5 1 Power supply terminal 71 5 ADDA converter select signal input Not used open 72 SLOCK Spindle lock output Not used open 73 TLOCK Tracking lock output Not used open Focus lock test signal output Not used open Not used open BUSY Servo busy test signal output Not used open 77 SBP RETRY SRV Spindle management retry test signal output No
47. R17 ERJ3GEYJ223V 1 16W 22K 1 ICP301 880410 IC PROTECTOR 1 TP 1 16 A R19 ERJ3GEYJ102V 1 16W 1K 1 JK201 5789236 JACK AC INLET 1 530 ERJ3GEYJ473V 1 16W AK JK701 SIF3069 4A IN OUT TERMINAL 1 wi 1 16 22K i JK702 GP1F32T OPTICAL OUTPUT 1 m musice On GRIS JK703 04 GP1F32R OPTICAL INPUT 2 mos i JK801 SJJD17B HEADPHONE JACK 1 ATR 1 R25 71042 1 16W 100K 1 3 RLQU100KI W COIL 3 26 ERJ3GEYJ473V 1 16W 47K 1 12 12 2 28 29 ERI3GEYJ473V 1 16W 47K 2 830 ERJ3GEYJ102V 1 16W 1 19 12 RIQUIOOET W 3 R31 2237 1 16W 22K 1 2215 2 R32 ERJ3GEYJ473V 1 16W 47K 1 115 RLQULOOKT w COIL 1 58
48. REEN YELLOW THIS PLUG IS NOT WATERPROOF KEEP DRY Before use Remove the connector cover How to replace the fuse The location of the fuse differ according to the type of AC mains plug figures and B Confirm the AC mains plug fitted and follow the instructions below Illustrations may differ from actual AC mains plug 1 Open the fuse cover with a screwdriver Figure A Figure B 2 Replace the fuse and close or attach the fuse cover Figure A Fuse 5 ampere Figure B Fuse amp 5 5 Location of Controls Front panel controls ACK MAP SEARCH S lt lt 21111854 REC LEVEL PHONES LEVEL 69 9 PLAY uy Unit on off button remote standby indicator 0 Use this button to turn the unit on and off off The unit is in standby mode on The unit is on The unit can be turned on and off with the remote control When the unit is turned off with the remote control it is in remote standby and the indicator lights The unit is still using a small amount of power in the standby and remote standby conditions Standby uses less powe
49. SC IN RSH1A044 1A SW LOAD PLAY REC RSH1A045 A SW LOAD TRG RSP1A023 A SW TV SW RSP2B023 A SW POWER EVQ21405R RSS3A18YA H SW PUSH SW TIMER INPUT EVQ21405R SW PUSH RSS3A18YA H SW TIMER INPUT EVQ21405R SW PUSH RSS2A63ZA H EVQ21405R SW REC MODE SW PUSH RTP1K4B033A POWER TRANSFORMER RRSP33J103CW THERMISTOR EVM3YSX50B14 VR LASER POWER ADJ EVJY10F01A24 VR PHONES LEVEL EVJY10F01A24 VR PHONES LEVEL RRV11B152A A VR JOG PUSH SET RSXY10MOMO2T OSCILLATOR RSXC16M9SO3T OSCILLATOR RSXY10MOMOlIT OSCILLATOR RCDGP1U28XD REMOTE SENSOR 712 1047 COMPONENT COMBINATION COMPONENT COMBINATION Part No Part Name amp DescriptionPcs Remarks REP2809A T SERVO P C B 1 tmavo REP2786A S SWITCH P C B 1 with Ref No c 2786 8 FL P C B 1 IMAVD REP2786A S SENSOR P C B 1 with 2785 1 mavo REP2786A S OPERATION 2 P C B 1 Kit with Ref No c REP2786A S OPERATION 1 P C B 1 Kit with Ref No c REP2786A S HEADPHONES JACK REP2786A S POWER SW P C B 1 xit with Ref No c REP2787A P POWER TRANSFORMER 1 MAVD 60 19 Cabinet Parts Location Note We do not supply
50. SS Cor Connector 77 6 pieces Step 7 emove the connector and then remove the Pull out the FFC MD servo P C B in the direction of arrow Step 1 Step 8 older the clip to the Motor motor terminal foil terminal Black gt foil Motor terminal foil Step 3 Clip and EDS angle lead wire Be careful not to lose the spring Spring Angle Step 5 Unsolder the 6 motor terminals clips to Motor terminals the motor terminals Motor terminals Black Step 10 onnect the extension cable to the connector Step 4 Motor terminals Check the MD servo side as shown below MD servo B side 8 6 Replacement for the magnetic head and optical pickup Follow the Step 1 Step 3 of item 8 1 Step 1 2 3 emove the MD mechanism unit Connector 2 ull out the FFC to connector Step 4 emove the 2 FPCs from the connector Connector 8 20002 1 Insert a short pin into the traverse unit FPC borad Refer to Handling Precautions for MD unit FPC Optical pickup N 22 13 Step 6 Release the 2 claws and then lift up the holder ass y Step 5 Hemove the pressure spring from latch Pressure NOTE When installing the holder ass y the pressure spring should be latched correctly
51. Service Manual Specifications System Recording Reading Sampling frequency Coding system Channel Frequency response S N ratio Play Dynamic range Play Wow and flutter Input Analog input Level Impedance Minidisc digital audio system Magnetic field modulation direct overwrite Non contact optical system with Semiconductor laser 1 780 nm 44 1 kHz ATRAC 2 channels stereo 5 20 000 Hz 20 3 dB 99 dB 97 dB Below measurable limit 500 mV 47 Digital input OPTICAL IN 1 OPTICAL IN 2 Wavelength 660 nm MB0003001C2 Mini Disc Deck SJ MD150 Mechanism Unit MR3A Colour Output Analog output Level Impedance 2 0 V 600 Q Digital output OPTICAL Rated output 17 dBm Wavelength 660 nm Headphone output level 15 mW 32 adjustable General Power supply AC 230 V 240 V 50 Hz Power consumption 13W Dimensions WxHxD 430x103x300 mm Mass 3 4 kg Notes Specifications are subject to change without notice Mass and dimensions are approximate US and foreign patents licensed from Dolby Laboratories Licensing Corporation WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repa
52. V ABCDEFGH IJKL R135 44 2 7 a gt w Reo ik p SQV ov 33v Ov 4 OV 33V 3 30 OV 33 3 3V 3 3V 3 37 3 37 3 3V i 995 5 3293 aso 535 IC10 3588 MN101DO3DAA1 3 SYSTEM CONTROL a TAN PLAY u 32V QV 3 3 63 LED 230 av Len ours 1 1 330 40V 0V 65 LED ours Zu 0 TESTO2 3 2 3 3V 1 2 9 0 55 1V DIV PLAY 3 2V Bus C114 560 xi 10 02MHz 1 8V 1 8V GHIJKLMNO 3 3V 20 A91 AD S 00 4971 AZ 0 2 92 8 62 8 2 x 5 gt 10 lt t a z IC72 8y 9 A62 ABZ 01813 ASL ALE A912 KASL ALL ALL lt 0182 APL L v2 VOLTAGE LINE SCHEMATIC DIAGRAM 4 5 ngs 120 mo 23 8225 A0 R85 22K 2 5 r x ER 2 182 059 POWER SUPPLY 5 R86 1K ASS gt a Z0A AGS gt 529 9 LEE S ASS ASS SESS OAZO omac gt
53. V 50 330P 2 90 91 zcuvinosopcv 50 2 C604 1 1042 5 50 0 10 1 C92 93 ECUVNCIO4ZEV 16V 0 10 2 C94 ECSTOGY475RR 4 4 70 1 1042 5 50 0 10 95 1042 16 0 10 607 ECBT1C222MR5 16 2200 1 96 97 ECSTOGYA75RR 4 4 70 2 C608 1 5487 25 4 70 1 C98 1047 16 0 10 1 C609 ECBT1H104ZF5 50 0 10 1 99 ECUV1H102KBV 50 1000 1 C610 ECBT1C222MR5 16V 2200P 1 C100 ECUVNC104ZFV 16 O 1U 1 C611 ECEALEKS4R7 25 4 70 1 C101 ECSTOGY106RR 4 100 1 612 13 1 1042 5 50 0 10 2 C102 ECUVNC104ZFV 16 0 10 1 711 12 zzuPLIRA70B 25 470 2 lt gt 103 ECSTOGY106RR 4 100 1 C713 14 102 5 50 1000P 2 C106 ECUV1H102KBV 50 1000 1 715 18 ECHR1H391J23 50 390P 4 C110 1042 16 0 10 1 C719 20 EEUPL1E470B 25 470 2 lt gt C111 ECSTOGY106RR 4 100 1 c721 22 ECBT1H102KB5 50 1000P 2 C112 ECEV1CALOONR 16 100 751 52 02 5 50 1000 2 C113 ECUVNCIOAZFV 16 0 10 1 C753 54 ECEALEKN3R3B 25 3 30 2 14 15 1 561 50 560 2 C755 56 2 2 5 50 2 2 2 C117 ECEVOJA331P 6 3 3300 1
54. W 1K 3 ERJ3GEYJ822V 1 16W 1 R451 52 ERDS2FJ103 1 4W 10K 2 ERJ3GEYJ223V 1 16W il R453 ERDS2FJ222 1 4W 2 2K 1 100 1 16w 10 1 R501 ERDS2FJ104 1 4W 100K 1 1 16W 22K 1 R502 ERDS2FJ222 1 4W 2 2K 1 ERJ3GEYJ102V 1 16W 1K 3 8503 ERDS2FJ103 _ 1 4 10K 1 1 16W 22K 1 R504 ERDS2FJ102 1 4W 1K 1 1 16W 47K 1 R601 ERD2FCJAR7 1 48 4 7 1 R83 ERJ3GEYJ102V 1 16W 1 602 ERDS2FJ102 1 4W 1 2153 1 464 8711 12 82 0561 1 4 560 2 223 1 16420 0 1 713 14 8827473 1 4W 47K 2 86 87 02 sm ik 2 8715 16 8808260822 1 44 8208 20 R89 90 1 16 1 2 871718 2 0123 1 2 R93 ERJ3GEYJ102V 1 16W 8719 22 2 333 1 4 33K 4 R95 ERJ3GEYJ222V 1 16W 2 2K 8723 24 eRDs2rgis4 1 6 15 2 898 99 ERJ3GEYJ102V 1 168 2 8725 26 ERDS2FJ331 1 4W 330 2 R727 30 ERDS2FJ151 1 4 150 4 R103 ERJ3GEYJ102V 1 16W 1K 8104 05 ERJ3GEYJ272V 1 16W 2 7 2 8751 54 880822273 1 4W 27K 4 2107 730 2102 1 16W 8755 56 ERDS2FJ333 1 aw 33K 2 R108 ERJ3GEYJ271V 1 16W 270 1 ERDS2FJ224 1 4W 220K 2 R109 ERJ3GEYJ105V 1 16W 1M 1 ERDS2FJ471 1 4W 470 2 R110 ERJ3GEYJ102V 1 16W 1K 1 ERDS2FJ222 1 4W 2 2K 1 ERJ3GEYJ221V 1 16W 220 2 1 ERDS2FJ680 1 4W 68 2 1 ERDS2FJ222 1 4W 2 2K 2 ERJ3GEYJ103z 1 168 10K
55. ch signal input PLAY REC 18 gt Load PLAY detect switch signal input PLAY PROTECT detect switch signal input Not used connected to GND Reset signal input Panel I F request signal input gt 39 0 5 4 gt 4 3 m e SCTSY MDISY PANEL mim nm 0114 1 r G mim D m 41449 olf LED OUT1 signal output for LED drive H TESTO Test terminal Not used open 131 Vgg2 3V 1 Power supply terminal 32 0501 Crystal oscillator 210 02 MHz 33 OSC2 34 Vs 0 35 X Notused connected to GND se Notused open 37 vs j ONDtemma j 38 TESTO3 Test terminal Not used open EEPCS chip select signal output Not used open EEPCK NU EEPROM clock signal output Not used open EEPDATA SE EEPROM data signal input output Not used connected to GND via resistor 42 TESTO4 Test terminal Not used open TESTOS Testterminal used open 44 CF SYNC 1 MDA synchronous signal input 45 TESTO6 _ Test terminal Not used open TESTO7 Connected rec play switch signal 47 Test terminal Not used open 48 HFON O HF module ON signal output Terminal VO Function Name PANEL C
56. e adjust by turning VR1 Refer to Fig 17 5 55 18 Replacement Parts List Notes Important safety notice Components identified by mark have special characteristics important for safety Furthermore special parts which have purposes of fire retardant resistors high quality sound capacitors low noise resistors etc are used When replacing any of components be sure to use only manufactures specified parts shown in the parts list The IB IC ID marks in Remarks indicate language of instruction manual lA English Spanish Swedish Russian Czech Polish IB English IC German Italian French lt 10 gt Netherlands Danish The parenthesized indications in the Remarks columns specify the areas Refer to the cover page for area The marking indicates in Remarks colums parts that are supplied by MAVD The marking RTL indicates that Retention Time is Limited for this item After the discontinuation of this assembly in production the item will continue to be available for a specific period of time The retention period of availability dependent on the type of assembly and in accordance with the laws governing part and product retention After the end of this period the assembly will no longer be available All parts are supplied by MESA Part No Part Name amp Description XTBR3 20JFZ SCREW XTBS348JFZ1
57. ired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death Technics 2000 Matsushita Electric Industrial Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law CONTENTS Page 1 Accessories 2 2 Handling Precautions for MD Unit 3 2 1 Handling of MD Unit optical pickup 3 2 2 Grounding for electrostatic breakdown prevention 3 3 Precaution of Laser Diode 8 4 4 Caution for AC Mains Lead een 5 5 Location of Controls MM 6 6 Self Diagnostic Function M 7 6 1 Setting to the self diagnostic function 6 2 Canceling the self diagnostic function 7 6 3 Clearing the self diagnostic function lt 7 7 Self Check Function 8 7 1 Setting to the self check function en 8 7 2 Checking the operation buttons 8 7 3 Checking the FL display nen 8 8 Operation Checks and Component Replacement Procedures9 8 1 Checking for the main P C B 8 9 8 2 Checking for the FL P C B and operation 1 P C B 10 8 3 Removal of the FL P C B operation 1 P C B operation 2 P C B and sensor P C B 10 8 4 Removal of the power switch P C B 11 8 5 Checking
58. ly terminal 59 1 Power supply terminal for pad 60 Dvssi GND terminal 384 884 5 5 5 o 62 scoL jBtclcksinalouput sws Word clock signal output 64 SDAP O data signal output 65 SDAR 1 Audio data signal input 00000000 66 LRCK word clock signal 67 CD bit clock signal input 68 DATA 1 data signal input 69 TX 0 _ Digital audio interface signal output 70 1 Digital audio interface signal 1 input 71 rx2 1 Digital audio interface signal 2 input 72 EREFM 1 open 73 REFM 0 EFM modulation signal output 74 Monitor signal output Not used open 75 2 Monitor signal output Not used open 76 Monitor signal output Not used open 77 MONIO Monitor signal output Not used open Reserved Not used connected to GND 79 182 Reserved Not used connected to GND TS Reserved Not used connected to GND 81 750 Reserved Not used connected to GND EXSYSCK ES External system clock input Not used connected to GND 83 DVpp2 1 Power supply terminal 84 1 __ Crystal oscillator f 16 9344 MHz 85 xo 0 86 ONDtemma o RFDAT O RF serial data output 88 RFCK O j RFseralcockoupu 89 NRFLD O RF serial load output
59. mi lo gt gt 5 c co psi U SPD TVON O BS Tracking balance adjustment output TE error gain adjustment output APP adjustment output Tracking drive signal output Traverse motor drive signal output Tracking error off set adjustment output Focus balance adjustment output Main beam amp gain adjustment output Power supply terminal Focus drive signal output BE Spindle motor drive signal output Drive IC spindle ON signal output Drive IC traverse ON signal output 24 0 Power supply terminal Rec Play switching signal output Power supply terminal for pad am Len Power supply terminal for pad DRAM address output Not used open address output R 43 VO data input output 46 RDTO 47 row address strobe signal output s output 49 NWE O DRAM write enable signal output NRST 1 SELAD 1 MSP MDA VE address select signal input 52 88 MSP MDA VF clock signal input 53 SSDW MSP MDA VF write data input 54 SSDR MSP MDA read data output 55 MDISY Leader synchronous signal output 56 SCTSY 0 ADIP synchronous noise output SGSYNC O Frame synchronous signal output 58 DVot Power supp
60. ponent Replacement Procedures This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components For reassembly after operation checks or replacement reverse the respective procedures Special reassembly procedures are described only when required 8 1 Checking for the main P C B Step 3 ie m cabinet v Step 2 rd Step 5 emove the 2 claws and then remove the rear panel Rear panel Claw Claw 7 Qx2 Step 6 the lead wire from cord clamper Cord clamper Lead wire P Check the main as shown below 8 2 Checking for the FL P C B and operation 1 P C B Follow the Step 1 Step 3 of item 8 1 Step 2 Release the 2 claws and then remove the front panel 55 Front panel ass y Claw Check the FL and operation 1 P C B as shown below Operation 1 8 3 Removal of the FL P C B operation 1 P C B operation 2 P C B and sensor P C B Follow the Step 1 Step 3 of item 8 1 Follow the Step 1 Step 2 of item 8 2 Step 1 Remove the 3 connectors and FFC Connector i CN251 Connector CN804 Connector CN711 Step 2 ull out the rec level knob and headphone level knob Rec level knob Step 7 elease the claw and Step 4 p 4 then remove the sensor
61. pull out the holder ass y Holder ass y 2 N p d e Main rack slot NOTE When installing the holder ass y align the lock lever pin with the main rack slot Step 12 the belt RDV0055 Loading motor REMO078 Notice for installing the loading motor Align the hole of loading motor with the boss of mechanism chassis and then install the loading motor Loading motor Mechanism chassis 8 8 Replacement for the traverse motor Follow the Step 1 Step 3 of item 8 1 Follow the Step 1 Step 11 of item 8 7 NOTE 1 Take care not to damage the magnetic head Do not tighten the set screw in excessive torque The parts may be damaged Step 2 Remove the magnetic head 2 REDOO47 1 Step 1 lt 3 gt pread the lugs of head shifter and then release the lugs from boss Step 4 ep REF base 51889 5 elease the 2 claws lt and then remove the REF base Traverse motor REMOO77 Notice for installing the traverse motor Align the hole of traverse motor with the boss of mechanism chassis and then install the traverse motor Traverse motor 9 Schematic Diagram Notes This schematic diagram may be modified at any time with the development of new technology Notes S1 S2 S3 4 S5 S6 S7 S8 6251 901 902 903 904 905 906 907 908 909 910 S91
62. r 2 Remote control signal sensor 8 MD slot 4 Eject button EJECT Search buttons 44 gt gt SEARCH Editing mode button EDIT Enter button used in editing ENTER Track mark mode select Character skip button TRACK MARK CHARA SKIP JOG skip dial JOG PUSH SET 44 gt P The remote control DISPLAY SCROLL No Name Display mode select Character select button DISP CHARA Headphones jack PHONES 42 Headphones level control LEVEL Timer selector TIMER Display 49 Record button 9 Stop button Pause button IH Playback mode selector PLAY MODE Synchro record button SYNCHRO REC 69 Playback recoding start button gt Recording level control REC LEVEL Recording mode selector REC MODE Input selector INPUT 49 Panel open button PUSH OPEN Press this button to open the transparent panel Close the panel by hand No Name D Unit on off button Use this button to turn the unit on and off when the unit s button is on Numeric buttons 1 0 gt 10 Program button PROGRAM Program clear button CLEAR amp A B repeat button A B REPEAT amp Repeat button REPEAT Editing mode button EDIT Enter button used in editing ENTER Search buttons 44 SEARCH PP Record button 6 REC Stop button Bil 2 Scroll button SCROLL Display select button DISPLAY
63. rt Name amp Description Pcs Remarks ECUVNCIO4ZFV 16V 0 10 C303 ECBT1H104ZF5 50V 0 1U 1 ECUVIH102KBV 50 1000P C304 1 101 50V 1000 1 ECUV1C393KBV 16 0 0390 C305 ECA1HM101 50 1000 1 ECUV1H472KBV 16V 4700 C306 ECA1HM101 50 1000 1 ECSTOGY226RR 4 22U C307 ECBT1H102KB5 50V 1000P d 1 1 2 1 1 1 1 1 32 50 3300P 1 C308 ECEA1HKA220B 50 220 ECUV1E123KBV 25 0 0120 1 309 10 1042 5 50 0 10 ECUV1H102KBV 50v 1000P 2 C311 12 ECAIEM471 25V 470U A ECSTOGY106RR 4 100 313 14 1047 5 50 0 10 2 1 102 50 1000P 2 C315 16 1 4708 25 470 2 lt gt 1 181 50V 180P 1 317 18 EEUPL1A221B 10 2200 2 lt gt ECUVNC104ZFV 16 0 10 1 C321 ECQV1H104JL3 50 0 10 1 lt gt ECEVOJA331P 6 3V 330U 1 C322 ECEAOJKS101 6 3 1000 El 2 ECSTOGY106RR av 100 1 C323 EEUPLIE101B 25 1000 i amv ECSTOGY106RR 4 100 1 324 25 02 8470 6 3 470 2 1042 16 0 10 1 C326 ECQV1H104JL3 50 0 1U 1 ECUVNA105ZFV 10 10 1 C327 ECEAQJKS101 6 3 1000 1 ECUVNC104ZFV 16 0 10 1 C328 ECBT1C103NS5 16 0
64. ss signal output BDO detection capacitor terminal 23 O detection signal output 24 terminal Off track detection signal input 26 1 Power supply terminal 27 NRFDET RF detect signal output Off track signal OFTR output NRFLD 1 Serial command latch signal input RF DATA command data signal input 3 RFCK Serial command clock signal input 1 _ Standby control signal input OUT RF EQIN EQinput 7 SVREF Reference VREF Reference voltage output RFI 1 RF2 i RF 2 signal input F 1 signal input F 2 signal input APP correction CPF capacitor connect terminal RF equalizer adjustment resistor connect terminal C signal detection input 16 2 2 AN8814SB E1 Focus Tracking Coil Spindle Traverse Motor Drive Terminal VO Function Name 3 3 V external transistor control Not used open 50 Function 3 3 V regular output monitor Not used connected to GND Not used open Op amp output Op amp invert input Op amp non invert output Not used connected to GND Vac Power supply terminal SZ 1 2 output terminal 2 Connected to GND via capacitor 9
65. t f 10 MHz 16 Power supply terminal 17 1 ACdetect signal input P84 1 Remote control signal input 19 TRG det switch signal input 20 P82 O Audio mute signal output H Mute 21 O DA AD power control signal output _ 22 Pao JOG LED ON OFF signal output P77 TIMER PLAY signal input 10 75 1 jDatasignalinputtrom 1010 P74 jDatasignalouputforiCio P73 1 TIMER REC signal input P72 1 Mono stereo select signal input Digital 1 2 select signal input Analog signal input Flash ROM data signal output Not used connected to GND via resistor P70 T 3 Not used connected to GND P42 Model select signal input P41 FL segment signal output 38 P40 39 P37 FL segment signal output 46 P30 o mmm 47 27 FL segment signal output 54 P20 55 P17 FL segment signal output 62 P10 o somonsimon 63 1 supply terminal 64 07 O segment signal output 65 Vg GND terminal 66 P06 FL segment signal output 72 Poo 73 P57 FL grid signal output 80 50 __ FL grid signal output 88 P60 89 VP Power supply terminal negative 190 P107 AN7 Notused connectedto 91 P106 AN6 Not used GND _______ 192
66. t used open Servo retry test signal output RETRY Not used open Address skip test signal output Not used open 17 14 16 5 1 72 M51V4400D7FS 4 Terminal VO Name 78 o cj r nmirnm or 4 3 34 Function DRAM data 1 input output DRAM data 2 input output DRAM write enable input DRAM row address strobe input DRAM address 9 input DRAM address 0 input DRAM address 1 3 input 52 Function Terminal Name CAS 1 Vss RAM column address strobe input RAM data 3 input output RAM data 4 input output ND terminal DO4 vo Vs 16 6 IC901 M30218MAA102 System Control FL Display 1 connectedtoGND _______ 21 Po connected 640 _______ 3 Pes O jDigtalintONsignalouptt 4 294 Digitalin2 ON signal output 5 Pos Not used connected to GND 6 1 Chip select signalinput 7 O Request signal output 8 P90 O Reset signal output 9 Flash ROM write power supply 10 87 LED drive control signal output P Notused connectedtoGND 12 1 Reset signal input L Reset XOUT Crystal oscillator output 10 MHz 14 j GNDtemna 15 Crystal oscillator inpu
67. tic bracelet 1 Fig 2 2 2 2 2 Put a conductive materiai sheet or steel sheet on the area where the MD unit optical pickup is placed and ground the sheet Refer to Fig 2 3 Work table grounding Iron plate or some metals to conduct electricity Fig 2 3 Caution The static electricity of your clothes will not be grounded through the wrist strap So take care not to let your clothes touch the MD unit optical pickup 3 Precaution of Laser Diode CAUTION THIS PRODUCT UTILIZES A LASER USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE CAUTION ACHTUNG This product utilizes a laser diode with the unit turned invisible laser radiation is emitted from the pickup lens Wave length 780 nm Maximum output radiation power from pickup 4 9 uW VDE Laser radiation from the pick up unit is safety level but be sure the followings 1 Do not disassemble the pickup unit since radiation from exposed laser diode is dangerous 2 Do not look at the focus lens using optical instruments 3 Recommend not to look at pickup lens for a long time Dieses Produkt enth lt eine Laserdiode Im eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheit abgestrahlt Wellenl nge 780 nm Maximale Strahlungsleistung der Lasereinheit 4 9 uW VDE Die Strahlung an der Lasereinheit ist ungef hrlich
68. tice Components identified by AA mark have special characteristics important for safety Furthermore special parts which have purposes of fire retardant resistors high quality sound capacitors low noise resistors etc are used When replacing any of components be sure to use only manufacturer s specified parts shown in the parts list Caution IC and LSI are sensitive to static electricity Secondary trouble can be prevented by taking care during repair Cover the parts boxes made of plastics with aluminum foil Ground the soldering iron Put a conductive mat on the work table Do not touch the legs of IC or LSI with the fingers directly Voltage and signal line en Positive voltage line Negative voltage line MD playback signal line p pe MD recording signal line 10 Schematic Diagram SCHEMATIC DIAGRAM 1 NOTE 1 The number which noted at the connectors on the schematic diagram as SCHEMATIC DIAGRAM 1 or SCHEMATIC DIAGRAM 2 indicates the schematic diagram serial number located on the left corner in the schematic diagram MD SERVO CIRCUIT LASER OPTICAL PICKUP POWER ADJ VR1 10K B 1 TRACKING COIL FOCUS COIL gt QEON NR GND 8 TP37 25 1295 6 LASER POWER DRIVE R22 24V 00 2 4V 2 6V 8 25 14625 POWER SUPPLY L700 MAGNETIC HEAD C120 C81 56
69. to the optical pickup 7 Press 8 on the remote control transmitter ROM LASER will be displayed to indicate the ROM data confirmation mode 8 Confirm that the reading of the laser power meter is within the specified range Specified range ROM data laser power 540 pW 660 pW 9 Press 1 on the remote control transmitter Fig 17 3 RAM LASER will be displayed to indicate the RAM data confirmation mode 10 Confirm that the reading of the laser power meter is within the specified range Specified range RAM data laser power 540 pW 660 pW Optical pickup If the reading in either step 8 or 10 above is not within the specified range first switch off the power and then reset the unit to the adjustment mode and repeat the adjustment procedure 1 Turn the power OFF Fig 17 4 4 Confirm that the reading of the laser power meter is within the specified range If it is not within the specified range adjust by turning VR1 Refer to Fig 17 5 VR1 Fig 17 5 Specified range read power 600 uW or lower Caution Proceeding on to the subsequent adjustment procedure with the read power exceeding 600 pW will result in damage to the optical pickup 5 Press 2 on the remote control transmitter WRITE LASER will be displayed to indicate the write power adjustment mode 6 Confirm that the reading of the laser power meter is within the specified range If it is not within the specified rang
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