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Panasonic SJ-MJ50GH Service Manual

Portable md player
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ORDER No.AD0201005C3
Portable MD Player
SJ-MJ50GH
MD unit: RAE1619Z-M Mechanism Series
Colour
(S)...................Silver Type
SPECIFICATIONS
Specifications
1
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Summary of Contents for Panasonic SJ-MJ50GH

  • Page 1 ORDER No.AD0201005C3 Portable MD Player SJ-MJ50GH MD unit: RAE1619Z-M Mechanism Series Colour (S)....Silver Type SPECIFICATIONS Specifications...
  • Page 2 Play time [Approximate operating time in hours (in hold mode, at 25°C, on a flat, stable surface)] Using earphones: Battery type: Play time (Normal/ LP2/ LP4) Rechargeable: 29 hours/ 41 hours/ 48 hours Panasonic 55 hours/ 74 hours/ 93 hours alkaline:...
  • Page 3 Using the speakers: Battery type: Play time (Normal/ LP2/ LP4) Rechargeable: 9.5 hours/ 9.5 hours/ 9.5 hours Panasonic 15 hours/ 15 hours/ 15 hours alkaline: Both together: 26 hours/ 26 hours/ 26 hours [When the rechargeable battery (included) is fully recharged.]...

  • Page 4: Precaution Of Laser Diode

    Wired remote control..........1 pc. (N2QCBD000020) External battery case..........1 pc. (K3ZZ00200041) Nickel-metal hydride rechargeable battery.....1 pc. (RFKFHFAZ01EM) Soft case..............1 pc. (RFC0069-H) Speaker/battery carger...........1 pc. (L0EAAB000002) AC adaptor...............1 pc. (N0JCBD000001) 2. Precaution of Laser Diode...
  • Page 5 3. Operating Instructions 4. Handling Precautions for MD Mechanism (Optical...
  • Page 6 pickup) The laser diode in the MD mechanism (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). 4.1.
  • Page 7 4.2. Grounding for electrostatic breakdown prevention 1. Human body grounding 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.

  • Page 8: Operation Checks And Component Replacement Procedures

    Fig. 4 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...
  • Page 9 required. After replacing the main components (optical pickup or traverse motor, etc.) of mechanism unit block, change to the adjust mode, and then perform the adjustments (Laser power, off-set, ROM/RAM). 5.1. Checking for the P.C.B.
  • Page 10 Check the P.C.B. as shown below.
  • Page 11 5.2. Replacement for the disc cover ass’y...
  • Page 12 5.3. Replacement for the side cabinet ass’y Follow the (Step 1) - (Step 3) of item 5.1.
  • Page 14 5.4. Replacement for the intermediate cabinet Follow the (Step 1) - (Step 3) of item 5.1. Follow the (Step 1) - (Step 4) of item 5.3.
  • Page 16 5.5. Replacement for the link unit (L), (R) Follow the (Step 1) - (Step 3) of item 5.1. Follow the (Step 1) - (Step 4) of item 5.3. Follow the (Step 1) - (Step 3) of item 5.4.
  • Page 18 5.6. Replacement for the traverse motor Follow the (Step 1) - (Step 3) of item 5.1.
  • Page 21 5.7. Replacement for the optical pickup Follow the (Step 1) - (Step 3) of item 5.1. Follow the (Step 1) - (Step 4) of item 5.6.

  • Page 26: 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 27 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 28: Laser Power Adjustment

    Adjustment mode Display 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...
  • Page 29 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 Fig. 6 Fig.
  • Page 30 3. Press the key of the remote controller (“T0J ” changes to “LD ” of the LCD). 4. Press the key of the remote controller (“LD ” changes to “LP ” of the LCD). 5. Set the laser power at 600 W±10% by using VOL+ and VOL- key of the remote controller.
  • Page 31 But if available is a MD cartridge type only, follow the procedure below. 1. Disassemble the unit so that only the mechanism unit and the printed circuit board are exposed. (as shown in Fig. 8 2. Set the laser power meter cartridge. (as shown in Fig.
  • Page 32 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 “T1J ” displayed, leave the disc cover open. 3.
  • Page 33 4. Press key (“AOK ” or “ANG ” changes to “T2J ”). 5. After the adjustment is finished, remove the disc. 6.2.5. Playback-only disc automatic adjustment 1. Have “T3J ” indicated on display, set the playback-only disc. (Check to make sure the disc is properly seated.) 2.

  • Page 34: Troubleshooting Guide

    Main unit’s keys LCD display position and letters After the third key is pressed, the second digit displayed will change from “ ” to “O ”. VOL+ After the second key is pressed, the third digit displayed will change from “ ”...

  • Page 42: Schematic Diagram Notes

    8. Schematic Diagram Notes 8.1. Type Illustration of IC's, Transistors and Diodes...
  • Page 43 8.2. Schematic Diagram Notes This schematic diagram may be modified at any time with the development of new technology. Notes: : Volume control switch (+) S202 : Cover open/close det. switch S207 : Hold switch in “OFF” position. (HOLD) S208 : Volume control switch (-) SX201 : Skip/search switch (...

  • Page 44: 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 (C1BB00000640): RF AMP...
  • Page 45 Mark Function Division PPIT Pit/ Group select signal input terminal (H: Pit/ L: Group) RVCC Power supply terminal RF 1 signal input terminal RF 2 signal input terminal Power supply terminal F 1 signal input terminal F 2 signal input terminal A signal input terminal B signal input terminal C signal input terminal...
  • Page 46 F2 signal IV conversion output terminal Mark Function Division F1 signal IV conversion output terminal RGND — GND terminal 29 BOTTOM — RF bottom signal output terminal (Not used, open) PEAK RF peak signal output terminal Track detection signal output terminal Connected to GND through capacitor Connected to GND through...
  • Page 47 Mark Function Division ISET VCEC current charge pump bias resistor terminal VCVSS — GND terminal AVDD1D Power supply terminal PEAK Peak signal input terminal Focus error signal input terminal Focus error signal input terminal LNP error signal input terminal LNP error signal input terminal Tracking error signal input terminal...
  • Page 48 Mark Function Division VCC2 Power supply terminal — DRAM data in/ output terminal (Not used, open) — Not used, open — DRAM data in/output terminal (Not used, open) — Not used, open — Not used, open VCC2 Power supply terminal —...
  • Page 49 Mark Function Division SLD1 Sled control signal input terminal SLD2 Sled control signal input terminal SLD3 Sled control signal input terminal 68 FOPWMF Focus PMW output terminal 69 FOPWMR Focus PMW output terminal 70 TRPWMF Tracking PMW output terminal 71 TRPWMR Ttacking PMW output terminal Verocity puls signal input...
  • Page 50 Mark Function Division OUTL — 1bit DAC output terminal (Lch) OUTR — 1bit DAC output terminal (Rch) AVSS — GND terminal of LPF for 1bit DAC DDOUT Power supply terminal — GND terminal VCC2 Power supply terminal 16.9344MHz oscillate input terminal XOUT 16.9344MHz oscillate...
  • Page 51 Mark Function Division VCC2 Power supply terminal MAD3 — DRAM address output terminal (Not used, open) MAD2 — DRAM address output terminal (Not used, open) MAD1 — DRAM address output terminal (Not used, open) MAD0 — DRAM address output terminal (Not used, open) MAD10 —...
  • Page 52 Mark Function Division VREF- — Connected to GND Remote control key input REM_KEY terminal KEYIN Unit key input terminal BATT Battery voltage detection input terminal — — Connected to GND — — Connected to GND — — Connected to GND OUTC —...
  • Page 53 CHARGE Recharge control output terminal...
  • Page 54 Mark Function Division 30 LD_PWM Laser power controlling PWM output terminal DCIN_ Charger starting detection signal input terminal WAKEUP INTB IC101 interrupt signal input terminal WRQB IC101 interrupt signal input terminal 34 OPEN_SW Lid open/ close detection input terminal (H: Open/ L: Close) —...
  • Page 55 Mark Function Division SHOCK Signal detection signal/ sleep control signal input terminal — — Not used, open DATA_ — Not used, open FLASH CLK_ — Not used, open FLASH 57 DRV_STBY Driver IC standby output terminal 58 SP_STBY Driver IC circuit spindle standby output terminal PPIT Pit/ Group select signal...
  • Page 56 Mark Function Division MUTEB Analog mute B output terminal MUTE_ Mute mode dicision input terminal MODE (Connect to GND) 74 EEP_DATA_I I EEP ROM data input terminal 75 EEP_DATA_O O EEP ROM data output terminal EEP_CK EEP ROM clock output terminal EEP_CS EEP ROM chip select...
  • Page 57 Mark Function Division 3-phase sled drive power supply terminal Spindle motor block brake terminal PGND4 — GND terminal SUCO Sled driver block position detection comparator output terminal 3-phase sled (U) output terminal 3-phase sled (V) output terminal SVCO Sled driver block position detection comparator output terminal SWCO...
  • Page 58 Mark Function Division PWM signal input terminal (H: Output TR ON) — GND terminal Spindle motor position detection comparator filter output terminal COMIN Spindle motor position detection comparator filter input terminal VCOIN VCO control voltage input terminal (Connected to GND through capacitor) —...
  • Page 59 Mark Function Division IN1F H bridge (1) logic forward input terminal 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.

  • Page 60: Replacement Parts List

    Carrying Case to prevent shorting accidents that may occur when Rechargeable Battery Ass’y is carried about Battery Carrying Case. (as shown Fig. 11 Fig. 11 15. Replacement Parts List Notes: *Important safety notice: Components identified by mark have special characteristics important for safety.
  • Page 61 specified parts shown in the parts list. *Warning: This product uses a laser diode. Refer to caution statements. *Capacity values are in microfarads (uF) unless specified otherwise, P=Pico- farads (pF) F=Farads (F) *Resistance values are in ohms, unless specified otherwise, 1K=1,000 (OHM), 1M =1,000K (OHM) *The marking ...
  • Page 62 Ref. No. Part No. Part Name & Description Remarks A5-2 RFKY0004 REMOCON CLIP ASS’Y RFKFHFAZ01EM RECHARGE.BATT.ASS’Y A6-1 RFA0475-Q RECHARGE.BATT.CASE RFC0069-H CARRYING CASE RQT6378-G INSTRUCTION MANUAL RQCB0169 SERVICE CENTER LIST ECUE1E332KBQ 25V 3300P F1G1E332A059 F1H0J1050013 6.3V 1U F1H0J1050013 6.3V 1U ECUV1A224KBV 10V 0.22U F1H1A224A001...
  • Page 63 Ref. No. Part No. Part Name & Description Remarks C403 F1G1H330A422 50V 33P C404 F3Z0G3360001 4V 33U C405 F3Z0J106A001 6.3V 10U C406 F1J0J4750010 6.3V 4.7U C407 F1J0J4750010 6.3V 4.7U C410 ECJ0EB1A104K 10V 0.1U C411 ECUE1C103KBQ 16V 0.01U F1G1C103A044 C412 ECUE1C103KBQ 16V 0.01U F1G1C103A044 C415...
  • Page 64 Ref. No. Part No. Part Name & Description Remarks IC401 XC6367A151MR C0DBAFZ00012 IC402 C0DBAFZ00021 IC501 TA2131FL C1BB00000516 IC601 C0JBAF000439 IC602 NJU7015RTE1 C0ABHA000012 ICX403 XC6372C501PR C0DBAHZ00001 JK501 RJJ36TA02-C JACK,HEADPHONE K2HC106E0003 L201 G1C100Z00011 COIL L401 G1C100Z00011 COIL L402 G1A330D00007 COIL L403 RLQP100MT-W COIL G1C100M00016 L406...
  • Page 65 Ref. No. Part No. Part Name & Description Remarks R109 ERJ2GEJ332X 1/4W 3.3K ERJ2RMJ332X R112 ERJ2GEJ224 1/4W 220K ERJ2RMJ224X R113 ERJ2GEJ103 1/4W 10K ERJ2RMJ103X R115 ERJ2GEJ393X 1/4W 39K ERJ2RMJ393X R116 ERJ2GEJ103 1/4W 10K ERJ2RMJ103X R117 ERJ2GEJ101 1/4W 100 ERJ2RMJ101X R120 ERJ2GEJ473X 1/4W 47K ERJ2RMJ473X...

  • Page 66: Cabinet Parts Location

    Ref. No. Part No. Part Name & Description Remarks S202 EVQPUL02K SW,VOLUME(-) S207 RSH1A039-A SW,OPEN/CLOSE DET. K0L1BA000037 S208 RSS2A010-1A SW,HOLD K0D112B00071 SX201 EVQPUL02K SW,VOLUME(+) SX203,04 RSG0051-P SW,SKIP/SEARCH SX206 RSG0051-P SW,PLAY/STOP X101 H2D169500019 OSCILLATOR X201 H2D400400010 OSCILLATOR Z401 RJH9212-1 CONNECTOR TERMINAL K4BC02E00007 Z402 K4ZZ01000154...
  • Page 67 H020200000 KA/AM 2002 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.

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