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Panasonic SJ-MJ88 Service Manual

Portable md player
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ORDER No.AD0101008C2
Portable MD Player
SJ-MJ88
MD unit: RAE1611Z Mechanism Series
Colour
(S)...................Silver Type
Areas
EB...................Great Britain.
EG...................Europe.
1

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Summary of Contents for Panasonic SJ-MJ88

  • Page 1 ORDER No.AD0101008C2 Portable MD Player SJ-MJ88 MD unit: RAE1611Z Mechanism Series Colour (S)...Silver Type Areas EB...Great Britain. EG...Europe.

  • Page 2: Specifications

    SPECIFICATIONS Audio System: Laser: Sampling frequency: 44.1 kHz Coding: No. of channels: Frequency response: 20 Hz~20 kHz (+0 dB, -8dB) Wow and flutter: General Output terminal Output Jack: Power output: Power supply Rechargeable battery: Battery: Dimensions (WxHxD) Cabinet dimensions incl.projecting parts Weights: Play time (When used in hold mode, at 25°C, on a flat, stable...
  • Page 3 Panasonic alkaline: Both together: Charger Input: Output: Recharging time: Notes: The play time may be less depending on Specifications are subject to charge 1. Accessories Stereo earphones...1 pc. (L0BAB0000162) Wired remote control...1 pc. (RFEV025P-SM) External battery case...1 pc. (K3ZZ00200038) Rechargeable Ni-Cd battery...1 pc.

  • Page 4: Precaution Of Laser Diode

    Carrying case...1 pc. (RFC0056-K) For EB area Charger...1 pc. (RP-BC155AEBY) For EG area Charger...1 pc. (RP-BC155AEYB) 2. Precaution of Laser Diode...

  • Page 5: Handling Precautions For Traverse Deck

    3. Operating Instructions 4. Handling Precautions for Traverse Deck The laser diode in the traverse deck (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 traverse deck (optical pickup).
  • Page 6 4.2. Grounding for electrostatic breakdown prevention 1. Human body grounding Fig. 1 Fig. 2...
  • Page 7 Use the anti-static wrist strap to discharge the static electricity from your body. (as shown in Fig. 3 2. Work table grounding Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) is placed, and ground the sheet. (as shown in Fig.

  • Page 8: Operation Checks And Component Replacement Procedures

    5. Operation Checks and Component 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.
  • Page 10 Check the P.C.B. as shown below.
  • Page 11 5.2. Replacement for the lock unit, open knob and intermediate cabinet Follow the (Step 1) - (Step 3) of item 5.1.
  • Page 15 5.3. Replacement for the disc cover ass’y Follow the (Step 1) - (Step 3) of item 5.1. Follow the (Step 1) - (Step 3) of item 5.2.
  • Page 16 5.4. Replacement for the traverse motor Follow the (Step 1) - (Step 3) of item 5.1.
  • Page 20 5.5. Replacement for the optical pickup Follow the (Step 1) - (Step 3) of item 5.1. Follow the (Step 1) - (Step 5) of item 5.4.

  • Page 25: Measurements And Adjustments

    6. Measurements and Adjustments Note: After replacing the main components (optical pickup or traverse motor, etc.) of mechanism unit block, change to the adjust mode, and then perform the “Laser power adjustment”, “Off-set automatic adjustment” and “Playback-onlydisc/ magneto-optical disc automatic adjustment”. 6.1.
  • Page 26 3. Laser power meter (LE8010 or compatible meter) 4. Remote controller 6.2. Laser power adjustment, Off-set automatic adjustment, Playback-only disc/magneto-optical disc automatic adjustment magnet 6.2.1. Enter the adjustment mode Caution: Place the unit on the insulation sheet with the disc cover side facing up. 1.

  • Page 27: Laser Power Adjustment

    Laser power adjustment Off-set automatic adjustment Magneto-optical disc automatic adjustment Playback-only disc automatic adjustment Jitter meajurement (74minutes) Jitter meajurement (60 minutes) Destination change Off-set automatic adjustment value check Magneto-optical disc automatic adjustment value check Playback-only disc automatic adjustment value check Error rate measurement (double velocity) ROM collection DRAM check...
  • Page 28 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. 6.2.2.2. Adjustment Procedure 1. Uncover the laser power meter. (as shown in 2. Locate the sensor of the laser power meter at a position above the optical pickup (horizontally at a level of the disc position).
  • Page 29 4. Press the key of the remote controller (“LD ” changes to “LP ” of the LCD). 5. Set the laser power at 600 remote controller. [Specified range: 600 Caution: Proceeding on to the subsequent adjustment procedure with the read power exceeding 600 W±10% will result in damage to the optical pickup.
  • Page 30 Fig. 9...
  • Page 31 6.2.3. Off-set automatic adjustment 1. Remove the mechanism unit from the disc cover. Then move the optical pickup to the center, and attach the mechanism unit again to the disc cover. 2. With “T1E ” displayed, leave the disc cover open. 3.
  • Page 32 4. Press key (“AOK ” or “ANG ” changes to “T2E ”). 5. After the adjustment is finished, remove the disc. 6.2.5. Playback-only disc automatic adjustment 1. Have “T3E ” indicated on display, set the playback-only disc. (Check to make sure the disc is properly seated.) 2.

  • Page 33: Troubleshooting Guide

    Main unit’s keys VOL+ VOL- HOLD OFF 5. After all keys have been pressed and there is no abnormality, “T OOO ” will be displayed. 6. Perform below voltage check about the keys come under if it is not displayed “T OOO ”.

  • Page 41: Schematic Diagram Notes

    8. Schematic Diagram Notes 8.1. Type Illustration of IC's, Transistors and Diodes...
  • Page 42 8.2. Schematic Diagram Notes This schematic diagram may be modified at any time with the development of new technology. Notes: S201 S202 S203 S204 S206 S207 S208 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 43: Schematic Diagram

    Voltage and signal line : Positive voltage line : Playback signal line 9. Schematic Diagram 10. Printed Circuit Board Diagram 11. Block Diagram 12. Terminal Function of IC's 12.1. IC1 (AN86772FHKEBV): RF AMP...
  • Page 44 Mark Division LD amp. output terminal LDIN LD amp. reverse input terminal APCPD Photo diode light quantity det. input terminal — Not used, open ARFO RF amp. output terminal — Not used, open EQIN EQ input terminal CRFAGC RFAGC capacitor connection terminal (Connected to power supply through capacitor)
  • Page 45 29 RFSWPG 35 NRFSTBY 12.2. IC101 (MN66620RF): ATRAC ENCORDER/DECORDER, SERVO SIGNAL PROCESSOR Mark Function Division ADIP ADIP signal output terminal — Not used, open RFSWHL Reflectance H/L switching signal input terminal Pit/Crv switching signal input terminal GND2 — GND terminal —...
  • Page 46 Mark Division RV DD 3 Power supply to internal DRAM RV DD 18 Voltage regulator output terminal (Connects to internal DRAM supply terminal) RV DD 23 — Voltage regulator input terminal (Accepts a supply voltage identical to that for IO pad) Voltage regulator ON/OFF control signal input terminal (1:ON, 2:OFF)
  • Page 47 Mark Division RV DD 1 Power supply to internal DRAM RV SS 2 — GND to internal DRAM FODP Focus drive (+) PWM signal output terminal FODM Focus drive (-) PWM signal output terminal SPDP Spindle drive (+) PWM signal output terminal SPDM Spindle drive (-) PWM signal output terminal...
  • Page 48 terminal for EFM PLL Mark Division ADIP ADIP signal input terminal PEAK Servo ADC input terminal BTOM GAIRAN MON3T VREFI Servo ADC input/voltage reference for ADIP comparator Servo ADC input terminal AV DD 0 — Analog power supply Servo ADC input terminal AV SS 0 —...
  • Page 49 12.3. IC201 (MN101C32GAE): SYSTEM CONTROL Mark Function Division VREF- — AD reference input (-) (connected to GND) (AN0) Remote cont. key input terminal (AN1) Unit key input terminal KEY IN (AN2) Battery voltage det. input BATT terminal (AN3) — Not used, connected to (AN4) (AN5) (AN6)
  • Page 50 Mark Division SSDR Read data input terminal for CPU interface SSCLK Clock output terminal for CPU interface BUZZER Confirmation tone output terminal Reset signal input terminal CFSYNC Synchronize signal input terminal for CPU interface SELAD Address select output terminal for CPU interface —...
  • Page 51 Mark Division BATT — Battery check LED drive output terminal (Not used, open) JITTER — Process inspection output terminal (Not used, open) REG2 Model switching input terminal (L:MJ88, H:MJ80) REG3 Recharge switching input terminal — — Not used, open EEP CS EEP ROM chip select output terminal EEP CK...
  • Page 52 79 BATTCHK 12.4. IC301 (C0GBZ000006): FOCUS/TRACKING COIL/ TRAVERSE MOTOR DRIVE/ROTALY DETECTOR Mark Function Division 4-ch. driver standby output terminal (L:Standby) STBY2 FD/TR coil power supply control output terminal Battery check output terminal (Not used, open) MSP reset output terminal (L:Reset)
  • Page 53 Mark Division IN1R H bridge 1 reverse input terminal IN2F H bridge 2 forward input terminal IN2R H bridge 2 reverse input terminal STALL Standby input terminal STHB H1, H2 bridge mute input terminal SPVM1 Spindle power unit’s power supply 1 SPUOUT Spindle motor coil (U) output terminal...
  • Page 54 Mark Division SPUIN SPIN detection comparator (U-phase) input terminal SPVIN SPIN detection comparator (V-phase) input terminal SPWIN SPIN detection comparator (W-phase) input terminal SPCOM SPIN motor coil neutral point input terminal Soft switching gain control resistor terminal Startup oscillation capacitor terminal CSL1 Slope capacitor connection terminal 1...
  • Page 55 Mark Division SLVM2 Stepping power unit’s power supply 2 SLVOUT Stepping motor (V) output terminal SLPG1 — Stepping power unit’s GND SLUOUT Stepping motor (U) output terminal SLVM1 Stepping power unit’s power supply 1 V CC 2 — Small signal block power supply terminal 2 (Bip.) V CC 1 —...
  • Page 56 13. Caution in Use of Rechargeable Battery Ass'y Take Rechargeable Battery Ass’y out of Battery Carrying Case and use it. Be sure to carry Rechargeable Battery Carrying Case. If not, it may either heat or ignite by shorting with a metal. (as shown in 14.

  • Page 57: Replacement Parts List

    Replacement parts will be supplied for Battery Carrying Case (RFA0475-Q) without Rechargeable Battery Ass’y. To your customers, delivery Rechargeable Battery Ass’y together with Battery Carrying Case to prevent shorting accidents that may occur when Rechargeable Battery Ass’y is carried about Battery Carrying Case. (as shown Fig.
  • Page 58 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 manufacture’s specified parts shown in the parts list. *The parenthesized indications in the Remarks columns specify the areas. (Refer to the cover page for area.) *Warning: This product uses a laser diode.
  • Page 59 Ref. No. Part No. 13-5 RMX0156-1 STOPPER RUBBER RJR0195-2 BATTERY SHAFT RAF2000A-M OPTICAL PICKUP RXJ0025 DRIVE SHAFT RHD14067 SCREW RJC99039 RECHARGE.BATT.TERMINAL(+) RP-BP62EYS1 RECHARGEABLE BATT.ASS’Y A1-1 RFA0475-Q RECHARGEABLE BATT.CASE K3ZZ00200038 EXTERNAL BATTERY CASE RFC0056-K CARRING CASE RFEV025P-SM WIRED REMOTE CONTROL A4-1 RYQ0312-W REMOCON.CLIP L0BAB0000162...
  • Page 60 Ref. No. Part No. C308 ECUENA104KBQ 10V 0.1U C309-11 ECUENC333KBQ 16V 0.033U C318 ECUVNJ274KBV 63V 0.27U C319,20 ECUENA104KBQ 10V 0.1U C323-25 ECUE1H222KBQ 50V 2200P C330-33 ECUVNJ105KBV 63V 1U C401 F3Z0J336A002 6.3V 33U C402 RCST0GZ106RG 4V 10U C404 F3Z0J336A002 6.3V 33U C405 F3Z0J106A001 6.3V 10U...
  • Page 61 Ref. No. Part No. PCB1 REP3063A-M MAIN P.C.B.ASS’Y 2SB1295-6-TB TRANSISTOR XP152A12C0MR TRANSISTOR Q201 2SD1819ASTX TRANSISTOR Q202 2SB1295-6-TB TRANSISTOR Q401 XP151A13A0MR TRANSISTOR Q402,03 XP152A12C0MR TRANSISTOR Q404,05 XP151A13A0MR TRANSISTOR Q406,07 2SB1218ASTX TRANSISTOR Q408 XP4601TX TRANSISTOR ERJ2GEJ471X 1/4W 470 ERJ2GEJ1R0X 1/4W 1 ERJ2GEJ103X 1/4W 10K ERJ2GEJ223X 1/4W 22K...

  • Page 62: Cabinet Parts Location

    Ref. No. Part No. R507 EXB24V100JX 1/16W 10 R509 ERJ2GEJ221X 1/4W 220 R512 ERJ3GEYJ225V 1/16W 2.2M S201,02 RSG0051-P SW,VOLUME +,- S203,04 EVQPUL02K SW,SKIP/SEARCH S206 EVQPUL02K SW,PLAY/STOP S207 RSH1A039-A SW,COVER OP/CL DET. S208 RSS2A010-1A SW,HOLD X101 H2D169500012 OSCILLATOR X201 H2D400400010 OSCILLATOR Z401 RJH9212-1 CONNECTOR TERM.

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