Panasonic SJ-MD150 Servise Manual
  1. Manuals
  2. Brands
  3. Panasonic Manuals
  4. MiniDisc Player
  5. SJ-MD150
  6. Servise manual
Panasonic SJ-MD150 Servise Manual

Panasonic SJ-MD150 Servise Manual

Mini disc deck
Hide thumbs
Table of Contents

Quick Links

MB0003001C2
Mini Disc Deck
SJ-MD150
Mechanism Unit: MR3A
Colour
(K)..........Black Type
Areas
(E)..........Europe.
(EB).......Great Britain.
(EG).......Germany.
1
Table of Contents
loading

Related Manuals for Panasonic SJ-MD150

Summary of Contents for Panasonic SJ-MD150

  • Page 1 MB0003001C2 Mini Disc Deck SJ-MD150 Mechanism Unit: MR3A Colour (K)..Black Type Areas (E)..Europe. (EB)..Great Britain. (EG)..Germany. SPECIFICATIONS...
  • Page 2 © 2000 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. 1. Accessories - AC power supply cord for (E), (EG) areas / (RJA0043-1C)......1 pc. - AC power supply cord for (EB) area / (RJA0044-C)......1 pc. - Optical-fiber cable / (RJL1X009B08)......1 pc.
  • Page 3 - Stereo phone cables / (RJL2P004B08A).......2 pcs. - Remote control transmitter / (EUR645272)......1 pc. - Batteries / (R6, AA, UM-3)......2 pcs. Note: There are available on sales route. 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.
  • Page 4 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. Fig. 2-2. 2.2.2. Work table grounding Put a conductive material (sheet) or steel sheet on the area where the MD unit (optical pickup) is placed, and ground the sheet.
  • Page 5 4. Caution for AC Mains Lead...

  • Page 6: Location Of Controls

    5. Location of Controls 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.
  • Page 7 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.
  • Page 8 6.3. Clearing the self-diagnostic function The contents of abnormality display are stored in memory. In order to clear the memory, continue to press the STOP button ( ) 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.
  • Page 9 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. Fig. 7-5. Fig. 7-4. Fig. 7-5. The self check function can be canceled by pressing the POWER button (POWER) or pressing and hold the STOP button ( ) for at least 2 seconds.
  • Page 11 - Check the main P.C.B. 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.
  • Page 12 - Check the FL P.C.B. and operation (1) P.C.B. as shown below. 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.
  • Page 13 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.
  • Page 14 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. - Check the MD servo P.C.B. (A side) as shown below. 8.5.2. Checking for the MD servo P.C.B. / (B side)
  • Page 17 - Check the MD servo P.C.B. (B side) as shown below.
  • Page 18 8.6. Replacement for the magnetic head and optical pickup - Follow the (Step 1) - (Step 3) of item 8.1.
  • Page 22 8.7. Replacement for the belt and loading motor - Follow the (Step 1) - (Step 3) of item 8.1.
  • Page 24 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.
  • Page 26 9. Schematic Diagram Notes - This schematic diagram may be modified at any time with the development of new technology. Notes: 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.
  • Page 27 F. search switch (SEARCH S903: Editing mode switch (EDIT) S904: Enter switch used in editing (ENTER) S905: Track mark mode select/character skip switch (TRACK MARK/CHARA SKIP) S906: Display mode select/character select switch (DISP/CHARA) S907: Eject switch ( EJECT) S908: Stop switch ( S909: Pause switch ( S910:...
  • Page 28 Input selector switch in ANALOG position (INPUT) S903A: Recording mode selector switch in MONO position (REC MODE) VR1: Laser power adjustment VR VR801: Headphones level contorl VR (LEVEL) VR851: Recording level control VR (REC LEVEL) VR901: JOG/skip dial VR / (JOG/PUSH SET - 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.
  • Page 29 : MD playback signal line : MD recording signal line 10. Schematic Diagram 11. Printed Circuit Board Diagram 12. Type Illustration of ICs, Transistors and Diodes 13. Wiring Connection Diagram 14. Block Diagram 15. Troubleshooting Guide 16. Terminal Function of ICs 16.1.
  • Page 30 Terminal Function Name 1 CENVD D signal detection input LD amp output terminal 3 APC PD Photo diode detection input LD IN LD amp input APC amp reference voltage input 6 TEMP IN Temperature sensor amp input TEMP Temperature sensor amp output ADIP ADIP FM signal output TOFS...
  • Page 31 F 2 signal input Terminal Function Name 42 CLPF1 APP correction CPF capacitor connect terminal 43 CLPF1 RF equalizer adjustment resistor connect terminal Main beam A signal input Main beam B signal input Main beam C signal input Main beam D signal input 48 CENVC C signal detection input 16.2.
  • Page 32 Terminal Function Name Power cut 2 input Focus drive signal input Tracking drive signal input 16.3. IC3 (MN66616RA4): / ATRAC Encoder/Decoder, Servo Signal Processor Function Terminal Name ADIP ADIP FM signal input Lens position signal input Focus error signal input Tracking error signal input AS signal input 6 DRMONI...
  • Page 33 Function Terminal Name RAD9 DRAM address output RAD0 RDT3 I/O DRAM data input/output RDT0 47 NRAS DRAM row address strobe signal output 48 NCAS DRAM column address strobe signal output DRAM write enable signal output 50 NRST Reset signal input 51 SELAD MSP/MDA, I/F address select signal input...
  • Page 34 Function Terminal Name Reserved (Not used, connected to GND) Reserved (Not used, connected to GND) Reserved (Not used, connected to GND) Reserved (Not used, connected to GND) 82 EXSYSCK - External system clock input (Not used, connected to GND) 83 DV Power supply terminal Crystal oscillator (f=16.9344 MHz) 86 VD...
  • Page 35 Terminal Function Name DAC reset signal output (L: reset) DE emphasis signal output (L: DE emphasis) MUTE Muting signal output (Not used, open) 4 AD RST AD reset signal output (L: reset) RF amp standby control signal STBY output Power supply control output Reset signal output LOAD1 Loading motor drive 1 output...
  • Page 36 30 TEST02 Test terminal (Not used, open)
  • Page 37 Terminal Function Name 31 V Power supply terminal 2(3V) OSC1 Crystal oscillator (f=10.02 MHz) OSC2 GND terminal Not used, connected to GND Not used, open GND terminal 38 TEST03 Test terminal (Not used, open) 39 EEPCS EEPROM chip select signal output (Not used, open) 40 EEPCK EEPROM clock signal output...
  • Page 38 Terminal Function Name 60 VREF- Connected to GND TEMP Temperature sensor input KEY1 Operation key signal input KEY2 Operation key signal input Test signal input (Not used, open) LOAD Test signal input (Not used, open) TEST 66 LOAD P Test signal input (Not used, open) Test signal input (Not used, open) TEST KEY / IN...
  • Page 39 Terminal Function Name I/O DRAM data 1 input/output I/O 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 Power supply terminal DRAM address 4 - 8 input DRAM output enable input (Not used, connected to GND) DRAM column address strobe...
  • Page 40 Function Terminal Name JOG LED ON/OFF signal output TIMER (PLAY) signal input Communication clock signal output for IC10 Data signal input from IC10 Data signal output for IC10 TIMER (REC) signal input 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...
  • Page 41 Function Terminal Name 95 P102/AN2 Not used, connected to GND 96 P101/AN1 Not used, connected to GND GND terminal 98 P100/AN0 Not used, connected to GND 99 VREF Reference voltage input Power supply terminal 100 AV 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.

  • Page 42: Laser Power Adjustment

    - 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. 17.3.
  • Page 43 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. Fig. 17-5. Specified range (read power): 600 µ µ µ µ W or lower Caution: Proceeding on to the subsequent adjustment procedure with the read power exceeding 600 µ...
  • Page 44 the optical pickup. 7. Press “3” 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 µ µ µ µ W ~ 660 µ µ µ µ W 9.
  • Page 45 Ref. No. Part No. Part Name & Description Remarks RHD30035-K1 SCREW RKM0152-K TOP CABINET XTBS3+8JFZ1 SCREW REX0945 WIRE ASS’Y REZ1159 FLAT CABLE (30P) REZ1160 FLAT CABLE (20P) RHD30053 SCREW RKA0040BZ-K1 LEG BASE RYF0501-Q DOOR UNIT RGK1111-K RHD26033 SCREW...
  • Page 46 Ref. No. Part No. Part Name & Description Remarks RHD20053 SCREW RMB0504 SPRING RMG0447-K DAMPER XTN17+6GFZ SCREW RXQ0558 HOLDER RED0047 MAGNETIC HEAD EUR645272 REMOTE CONTROLLER / A1-1 UR64EC1987B R/C BATTERY COVER RJA0043-1C AC POWER CORD (E,EG) / / RJA0044-C AC POWER CORD (EB) ...
  • Page 47 Ref. No. Part No. Part Name & Description Remarks ECUVNA105ZFV 10V 1U ECUVNC104ZFV 16V 0.1U ECUVNC104ZFV 16V 0.1U C51,52 ECUVNA105ZFV 10V 1U ECUV1H332KBV 50V 3300P C55-58 ECUV1H102KBV 50V 1000P ECUV1C823KBV 16V 0.082U ECEV1CA100NR 16V 10U ECUV0J334KBV 16V 0.33U ECUV1H221KBV 50V 220P ECUVNE153KBV 25V 0.015U ECUVNC104KBV...
  • Page 49 Ref. No. Part No. Part Name & Description Remarks C302 ECA1CM103E 16V 10000 C303 ECBT1H104ZF5 50V 0.1U C304 ECA1HM101 50V 100U C305 ECA1HM101 50V 100U C306 ECA1HM101 50V 100U C307 ECBT1H102KB5 50V 1000P C308 ECEA1HKA220B 50V 22U C309,10 ECBT1H104ZF5 50V 0.1U C311,12 ECA1EM471 25V 470U...
  • Page 50 Ref. No. Part No. Part Name & Description Remarks C753,54 ECEA1EKN3R3B 25V 3.3U C755,56 ECBT1H2R2KC5 50V 2.2P C757,58 ECEA1EKN3R3B 25V 3.3U C759 ECBT1H104ZF5 50V 0.1U C761,62 ECEA1EKN3R3B 25V 3.3U C763-65 ECBT1H104ZF5 50V 0.1U C766,67 ECEA1EKS4R7 25V 4.7U C801,02 ECEA1AN101XB 10V 100U C803-08 ECBT1C103NS5 16V 0.01U...
  • Page 51 Ref. No. Part No. Part Name & Description Remarks FL901 RSL0282-F AN8772FHQ AN8814SB-E1 MN66616RA4 AK4518VF-E2 RN5RG33AA-TL TC7W04FTE12L RN5RZ26BA-TR IC10 MN101D03DAA1 IC11 TC74HCT00AFL IC72 M51V4400D7FS IC92 LB1830MS-TLM IC301-03 BA05ST-V5 IC304 S81233SGY-Z IC401 TC74HCT7007A IC402 TC74HC4050EL IC501 TC9246FELP IC601 AK4520AVF-E1 ...
  • Page 52 Ref. No. Part No. Part Name & Description Remarks 2SB1295-6-TB TRANSISTOR DTC114YETL TRANSISTOR 2SB1462STX TRANSISTOR 2SB1295-6-TB TRANSISTOR DTC114YETL TRANSISTOR 2SJ278MYTR TRANSISTOR 2SK1764KYTR TRANSISTOR 2SB1121ST-TD TRANSISTOR Q301,02 2SD1450S TRANSISTOR Q303 2SB1238QSTV6 TRANSISTOR Q304 DTA114ESATP TRANSISTOR Q305 2SD1862QRTV6 TRANSISTOR Q306 2SB1240-P TRANSISTOR Q307 2SD1862QRTV6...
  • Page 53 Ref. No. Part No. Part Name & Description Remarks ERJ3GEYJ473V 1/16W 47K ERJ3GEYJ272V 1/16W 2.7K ERJ3GEYJ183V 1/16W 18K ERJ3GEYJ273V 1/16W 27K ERJ3GEYJ333V 1/16W 33K ERJ3GEYJ223V 1/16W 22K ERJ3GEYJ102V 1/16W 1K ERJ3GEYJ222V 1/16W 2.2K ERJ3GEYJ223V 1/16W 22K ERJ3GEYJ333V 1/16W 33K ERJ3GEYJ222V 1/16W 2.2K ERJ3GEYJ473V 1/16W 47K...
  • Page 54 Ref. No. Part No. Part Name & Description Remarks R130 ERJ3GEYJ272V 1/16W 2.7K R131 ERJ3GEYJ101V 1/16W 100 R132 ERJ3GEYJ272V 1/16W 2.7K R133 ERJ3GEY0R00V CHIP JUMPER R134,35 ERJ3GEYJ272V 1/16W 2.7K R137 ERJ3GEYJ103Z 1/16W 10K R143 ERJ3GEY0R00V CHIP JUMPER R145,46 ERJ3GEYJ221V 1/16W 220 R147 ERJ3GEYJ102V 1/16W 1K...
  • Page 55 Ref. No. Part No. Part Name & Description Remarks R719-22 ERDS2FJ333 1/4W 33K R723,24 ERDS2FJ154 1/6W 150K R725,26 ERDS2FJ331 1/4W 330 R727-30 ERDS2FJ151 1/4W 150 R731-34 ERDS2FJ102 1/4W 1K R751-54 ERDS2FJ273 1/4W 27K R755,56 ERDS2FJ333 1/4W 33K R757,58 ERDS2FJ224 1/4W 220K R759,60 ERDS2FJ471 1/4W 470...
  • Page 56 Ref. No. Part No. Part Name & Description Remarks EVM3YSX50B14 VR,LASER POWER ADJ. VR801 EVJY10F01A24 VR,PHONES LEVEL VR851 EVJY10F01A24 VR,PHONES LEVEL VR901 RRV11B152A-A VR,JOG/PUSH SET RSXY10M0M02T OSCILLATOR RSXC16M9S03T OSCILLATOR X901 RSXY10M0M01T OSCILLATOR Z901 RCDGP1U28XD REMOTE SENSOR Z902 EXBZ12E104J COMPONENT COMBINATION Z903 EXBZ8E104J COMPONENT COMBINATION...
  • Page 57 20. MD Mechanism Unit Parts Location...
  • Page 58 21. Packaging...
  • Page 59 F000300000YM/KH...
  • Page 60 AN8772FHQ +B11 +B11 +B11 RF AMP MD OPTICAL PICKUP VREF VREF OFT IN SERIAL&PARALLEL SELECT COMP SIGNAL CONV./GATE OFT O DARK DET. CBD O RF BDO COMP 3T DET. BDO/ NRFDET TRCRS TRCRS AS BDO COMP ASGAIN 3 tap AS GAIN COMP 3 tap FBAL...
  • Page 61 TC74HCT00AFL L700 IC11 MAGNETIC Q10,11 NAND GATE HEAD MN66616RA4 +B10 HEAD M51V4400D7FS DRIVE IC72 ATRAC ENCODER/DECODER, 4M DRAM SERVO SIGNAL PROCESSOR OPTICAL NEFMON 1,2, 14~18 4 23 24,25 9~12 43~46 30~43 47 48 49 78~81 DIGITAL NREFM MONI0~3 EXTERNAL DRAM CHIP CONTROL PEFMS CONTROL...
  • Page 62 AK4518VF-E2 AD/DA CONVERTER FS384 MCLK TP23 CLOCK AINL CMODE DIVIDER DECIMATION MODULATOR FILTER LRCK VCML AINR SCLK TP24 DECIMATION FILTER MODULATOR VCMR SDTO SERIAL I/O INTERFACE COMMON VCOM SDTI VOLTAGE AOUTL L.P.F. TP28 INTERPOLATOR MODULATOR AOUTR L.P.F. TP26 INTERPOLATOR MODULATOR Q402,403 DEM1 Switching...
  • Page 63 AK4520AVF-E1 IC601 A/D,D/A CONVERTER CLOCK AINL+ DIVIDER DECIMATION FILTER MODULATOR LRCK VRADL AINR+ SCLK DECIMATION FILTER MODULATOR SDTI VRADR SERIAL I/O INTERFACE SDTO COMMON VCOM VOLTAGE VREFH VREFL AOUTL L.P.F. INTERPOLATOR MODULATOR AOUTR INTERPOLATOR L.P.F. MODULATOR MCLK REQPS MICRO COMPUTER DATAPS INTERFACE LOCK DET.
  • Page 64 -B1 +B3 (L ch) BUFFER VR851 (REC LEVEL) LINE IN BA4560FE2 IC751 (R ch) BUFFER -B1 +B3 BUFFER (L ch) Q703,704 Q705,706 BA4560FE2 MUTING MUTING LINE OUT IC711 BUFFER (R ch) M5218AFPE3 IC801 HEADPHONES Q801,802 HEADPHONES MUTING VR801 (PHONES LEVEL) HEADPHONES D717 Q452,453...
  • Page 65 D451 NOTE : MD PLAYBACK SIGNAL LINE : MD RECORDING SIGNAL LINE Q308 ICP301 REGULATOR D318 Q307 D317 REGULATOR BA05ST-V5 D452 T201 IC302 D301~304 REGULATOR BA05ST-V5 IC301 REGULATOR S81233SGY-Z IC304 RN5RG33AA-TL REGULATOR D319 D320 +B10 REGULATOR RN5RZ26BA-TR BA05ST-V5 +B11 REGULATOR IC303 L201 REGULATOR...
  • Page 66 MD SERVO P.C.B. (SIDE: A) TP101 TP100 TP103 C119 R103 R211 R110 R100 IC10 R108 R145 76 80 85 90 95 C134 C113 TP74 10 12 C154 R62 R61 TP77 C155 R60 R55 R146 (TRAVERSE MOTOR) TP56 TP149 IC92 TP123 E C B TP150 TP57...
  • Page 67 MD SERVO P.C.B. (SIDE: B) C133 R111 C117 R112 C122 R213 R109 C103 R143 C143 R212 R131 C101 C100 IC72 R124 R125 L15 C142 C141 R135 9 10 R134 R117 R121 R132 R116 C112 R104 R130 R122 ELECTRICAL PARTS LOCATION Ref.
  • Page 68 FL P.C.B. W902 R905 W901 B C E Q905 R903 SWITCH P.C.B. Q904 B C E Q903 B C E C909 FL901 Z902 1 2 3 4 5 6 7 8 9 10 Z903 (REP2575A) ELECTRICAL PARTS LOCATION Ref. No. Lo.
  • Page 69 MAIN P.C.B. ELECTRICAL PARTS LOCATION Ref. No. Lo. No. Ref. No. Lo. No. Ref. No. Lo. No. MAIN P.C.B. Q305 IC301 R306 C307 IC302 R307 C308 IC303 R308 C309 Q453 IC304 R309 C310 B C E IC401 R310 C311 IC402 R311 C312 B C E...
  • Page 70 HEADPHONE P.C.B. SENSOR P.C.B. Z901 (REMOTE SENSOR) W902 D903 JK801 L802 R938 CN802 (REP2786A-S) (REP2786A-S) PHONES OPERATION ( 1 ) P.C.B. VR801 S901A C802 (PHONES LEVEL) ( TIMER) IC801 PLAY Q802 W901 C801 CP802 5 4 3 2 1 R801 CN801 E C B C805...
  • Page 71 POWER SWITCH OPERATION (2) P.C.B. P.C.B. CN804 W903 S251 S902A S903A (INPUT) (REC MODE) POWER (ANALOG OPT2 OPT1) (MONO STEREO) VR851 (REC LEVEL) CN251 (REP2786A-S) (REP2786A-S) POWER TRANSFORMER P.C.B. CN201 1 2 3 4 ELECTRICAL PARTS LOCATION Ref. No. Lo. No. Ref.
  • Page 72 SCHEMATIC DIAGRAM-1 :POSITIVE VOLTAGE LINE :MD PLAYBACK SIGNAL LINE MD SERVO CIRCUIT NOTE: :MD RECORDING SIGNAL LINE 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.
  • Page 73 SCHEMATIC DIAGRAM-2 :POSITIVE VOLTAGE LINE :MD PLAYBACK SIGNAL LINE :MD RECORDING SIGNAL LINE 2.6V PLAY T U V W 0.9V TP150 TP149 0.5 s. 0.1V/DIV. TP148 TP122 TP52 TP123 2.2K 0.039 C122 TP36 PLAY 0.2V 0.5 s. 50mV/DIV. PLAY 0.45V 36 35 34 33 32 31 30 29 28 27 26 25 0.5 s.
  • Page 74 SCHEMATIC DIAGRAM-3 MD SERVO CIRCUIT :POSITIVE VOLTAGE LINE 2.6V 3.3V D E F G H I J K L R135 2.7K R104 2.7K R105 2.7K R121 2.7K R122 2.7K R134 2.7K R132 2.7K R130 2.7K TP74 C113 C143 4V10 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 3.3V SPMWE UNIT TEST...
  • Page 75 SCHEMATIC DIAGRAM-4 :POSITIVE VOLTAGE LINE 2.6V 3.3V 4V10 IC72 M51V4400D7FS 4M DRAM DTC114YETL POWER SUPPLY CONTROL 4.2V 3.3V AN8814SB-E1 FOCUS/TRACKING COIL, 2SB1295-6-TB SPINDLE/ TRAVERSE POWER SUPPLY MOTOR DRIVE TP103 TP100 TP101...
  • Page 76 SCHEMATIC DIAGRAM-5 MD SERVO CIRCUIT :POSITIVE VOLTAGE LINE :MD PLAYBACK SIGNAL LINE :MD RECORDING SIGNAL LINE C110 3.3V 4V10 2.6V 2.6V 3.3V 3.3V A W H V T U P RN5RZ26BA-TR REGULATOR 1000P 0.012 6.8K 220P 0.047 1.3V ADIP MONI2 1.3V PLAY PLAY...
  • Page 77 SCHEMATIC DIAGRAM-6 :POSITIVE VOLTAGE LINE :MD PLAYBACK SIGNAL LINE :MD RECORDING SIGNAL LINE 3.3V 2SB1121ST-TD REGULATOR 3.3V A D C E U V T 4.3V AK4518VF-E2 AD/DA CONVERTER 4.1V 0.8V DGND SDTO 3.3V 1.7V SCLK (1.7V) 1.7V SDTI LRCK 3.3V R201 4.7K 3.3V...
  • Page 78 SCHEMATIC DIAGRAM-7 FL CIRCUIT :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE FL901 (RSL0282-F) Z903(100K Z902(100K 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 11 12 S907 S901 EJECT) (SEARCH S908 S902 (SEARCH S909 S903...
  • Page 79 SCHEMATIC DIAGRAM-8 :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE N M L K J I H G F E D C B 4.9V -27.6V -23.3V -27.6V -28.3V -27.6V -28.2V -28.5V -25.9V -32V -28.5V -19.3V 7.2ms. -32V -28.5V -17.7V 7.2ms. -27.7V -12.9V -27.7V -29.1V -30.6V...
  • Page 80 SCHEMATIC DIAGRAM-9 :POSITIVE VOLTAGE LINE :MD PLAYBACK SIGNAL LINE MAIN CIRCUIT :NEGATIVE VOLTAGE LINE :MD RECORDING SIGNAL LINE DIGITAL OPTICAL D715 1SS254TA JK703 Q454 4.9V IC401 D716 Q454,455 1SS254TA TC74HCT7007A DTA143ESATP INTERFACE POWER SUPPLY JK704 Q455 R411 2.5V 4.5V 1.7V 4.9V R410 3.1V...
  • Page 81 SCHEMATIC DIAGRAM-10 :POSITIVE VOLTAGE LINE :MD PLAYBACK SIGNAL LINE :MD RECORDING SIGNAL LINE L601 PLAY PLAY PLAY 4.8V 4.8V 4.8V 0.2 s. 2V/DIV. 0.2 s. 2V/DIV. 0.36 PLAY/REC 4.8V 0.34 2.2V (1.5V) (2.5V) 1.7V 2.3V 2.4V 2.5V 2.5V 2.5V 2.5V AGND DECIMATION FILTER...
  • Page 82 SCHEMATIC DIAGRAM-11 MAIN CIRCUIT :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :MD PLAYBACK SIGNAL LINE C711 R711 R715 C715 C719 R725 25V47 8.2K 390P 25V47 R721 6.8V 6.8V PLAY IC711 6.2V BA4560FE2 BUFFER AMP 1kHz,0dB -8.1V C712 R712 R716 R718 R722 C720 R726 25V47...
  • Page 83 SCHEMATIC DIAGRAM-12 ANALOG PLAY :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :MD PLAYBACK SIGNAL LINE :MD RECORDING SIGNAL LINE 6.2V 1kHz,0dB R727 R729 JK701 D711 D713 R731 R733 1SS254TA 1SS254TA Q703 Q705 Q703-706 2SD1450RSTTA 0.5V 0.5V ( -0.2V) (-0.2V) MUTING D712 D714 R732 R734...
  • Page 84 RN5RG33AA-TL BA4560FE2 AN8772FHQ 48PIN AK4518VF-E2 24PIN RN5RZ26BA-TR MN101D03DAA1 80PIN AK4520AVF-E1 28PIN 100PIN MN66616RA4 LB1830MS-TLM 10PIN M5218AFPE3 8PIN No.1 No.1 S81233SGY-Z M51V4400D7FS TC7W04FTE12L AN8814SB-E1 TC74HCT00AFL 14PIN TC74HCT7007A 14PIN TC74HC4050EL 16PIN TC9246FELP 16PIN No.1 2SJ278MYTR 2SB1295-6-TB M30218MAA102 BA05ST-V5 2SB1121ST-TD 2SD1450RSTTA 2SK1764KYTR 2SB1462STX DTC114YETL .
  • Page 85 AC IN POWER SWITCH P.C.B. W201 T201 (POWER TRANSFORMER) CN251 CN201 DIGITAL ANALOG POWER TRANSFORMER P.C.B. CN751 ..CN301 SWITCH P.C.B. MD OPTICAL PICKUP 10 . 10 . MAIN P.C.B..CN402 (SPINDLE MOTOR) MD SERVO P.C.B.
  • Page 86 Power ON with no MD loaded. *1 *1 : Refer to Measurements and Adjustments Does player enter adjustment mode? *1 3.3V 3.3V Is CN4 power supply line OK? Set to read power adjustment mode. *1 Check power supply circuit on main unit. Is oscillation Is read power output? signal input for IC10...
  • Page 87 Is output voltage of IC1 pin 37 (TP35) approx. 1.3 V *1 Is voltage of IC1 pin 36 2.6 V? *1 Is voltage Is voltage on both sides of R5 Faulty IC9 of IC9 pin 3 at least 0.025 V? 2.6 V? Faulty IC1 3.3V...
  • Page 88 ROM/RAM Operation Can ROM disc be inserted correctly? Does CN4 H = 3.3V L = 0V D i s c t r a y pin 18 change from IC10 STOP/PLAY O P E N ? LOAD OPEN SW0 (S3) "H" to "L" when disc A LOAD PLAY/REC SW2 (S5) is inserted? B LOAD PLAY SW3 (S6)
  • Page 89 Is TOC read and disc data displayed? IC1 pin 11 IC1 pin 16 0.1V 50mV 2ms. 50mV/DIV. 2ms. 50mV/DIV. Is there output from IC1 pins 11 (TP55) and For measurements of IC1, refer to the 16 (TP57)? *1 item 8.5.2. of "Operation Checks and Component Replacement Procedures".
  • Page 90 IC3 pin 61 IC3 pin 64 3.2V 3.2V 0.5 s. 1V/DIV. F=16.9344MHz Is playback IC3 pin 62 IC3 pin 65 possible? 3.2V 3.2V Is playback sound T 0.36 s. T 11 s. Is output of IC3 pin 63 IC3 pins 61 ~ 65 OK 3.2V during playback? Press eject key...
  • Page 91 Traverse Operation Remains at outer track. Traverse operation Remains at inner track. Is IC10 pin 12 approx. 0 V? Faulty (shorted) traverse detection switch S8 Is IC10 pin 12 approx. 3.3 V? 1.3V Is output of IC3 pin 20 OK? Faulty traverse detection switch S8 Faulty IC3...
  • Page 92 Front panel controls 6 7 8 9 10 TRACK MARK/ JOG/PUSH SET DISP/CHARA SEARCH EDIT ENTER CHARA SKIP EJECT PUSH OPEN REC LEVEL LEVEL PHONES SYNCHRO TIMER REC MODE INPUT PLAY MODE STEREO MONO OPT 1 OPT 2 ANALOG PLAY Name Name Display mode select / Character select...

Table of Contents