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Panasonic DVD-K29GCS Prevention Of Static Electricity Discharge, Worktable grounding

Models: DVD-K29GCS

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5 PREVENTION OF STATIC ELECTRICITY DISCHARGE

DVD-K29GCS

5 PREVENTION OF STATIC ELECTRICITY DISCHARGE

The laser diode in the traverse unit (optical pickup) may brake down due to static electricity of clothes or human body. Use due caution to electrostatic breakdown when servicing and handling the laser diode.

5.1.Grounding for electrostatic breakdown prevention

Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electricity in the working environment. Proceed servicing works under the working environment where grounding works is completed.

5.1.1.Worktable grounding

1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.

5.1.2.Human body grounding

1. Use the anti-static wrist strap to discharge the static electricity form your body.

5.1.3.Handling of optical pickup

1.To keep the good quality of the optical pickup maintenance parts during transportation and before installation, the both ends of the laser diode are short-circuited. After replacing the parts with new ones, remove the short circuit according to the correct procedure. (See this Technical Guide.)

2.Do not use a tester to check the laser diode for the optical pickup. Failure to do so will damage the laser diode due to the power supply in the tester.

5.2.Handling Precautions for Traverse Unit (Optical Pickup)

1.Do not give a considerable shock to the traverse unit (optical pickup) as it has an extremely high-precise structure.

2.When replacing the optical pickup, install the flexible cable and cut its short land with a nipper. See the optical pickup replacement procedure in this Technical Guide. Before replacing the traverse unit, remove the short pin for preventing static electricity and install a new unit. Connect the connector as short times as possible.

3.The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the cable.

4.The half-fixed resistor for laser power adjustment cannot be adjusted. Do not turn the resistor.

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Panasonic DVD-K29GCS specifications Prevention Of Static Electricity Discharge, Worktable grounding, Human body grounding

Contents

DL4.1 Mechanism Series DVD / CD PlayerDVD-K29GCS ColourCONTENTS PagePage 14 INTERCONNECTION SCHEMATIC DIAGRAM & SCHEMATIC 1.1.1.LEAKAGE CURRENT COLD CHECK 1 SAFETY PRECAUTIONS1.1.GENERAL GUIDELINES 1.1.2.LEAKAGE CURRENT HOT CHECK See Figure3 Precaution of Laser Diode 4 About lead free solder PbFDistinction of PbF PCB 5.1.2.Human body grounding 5 PREVENTION OF STATIC ELECTRICITY DISCHARGE5.1.1.Worktable grounding 5.1.3.Handling of optical pickup6.2.Casing Parts and P.C.B. Positions 6 DISASSEMBLING THE CASING AND CHECKING P.C.B.S6.1.Disassembly Procedure DVD-K29GCS6.3.Top Panel 1. Pull out the mic volume knob2.Release the tabs 3.Remove the connectors 6.5. Mic P.C.B. and Operation P.C.B1.Unscrew the screws 2.Remove the connectors 6.9. Mother P.C.B. and Power SW P.C.B2. Remove the connectors 6.6. Module P.C.B6.10.2. Servicing position of the Mother P.C.B 6.10. Service Position6.10.1. Servicing position of the Module P.C.B 6.10.3. List of the Extension Cables7ASSEMBLING AND DISASSEMBLING THE MECHANISM UNIT 7.1.Disassembly Procedure7.2.Traverse Unit 7.3.Tray <Assembling the tray unit>7.4.Loading section 7.5.Loading motor P.C.B 1. Unscrew the screwsDVD-K29GCS 7.6.Optical Pickup Unit 5.Slide the shaft in the arrow direction 2. Unscrew the screws 3. Remove the drive rack4.Unscrew the screw 6. Lift the optical pickup unit with the shaft7.7.Traverse Motor <Assembling the optical pickup unit>DVD-K29GCS DVD-K29GCS 8 Self-DiagnosisFunction and Service Modes 8.1.Optical Pickup Breakdown Diagnosis8.2.Service Mode Table 8.3.DVD Self Diagnostic Function-ErrorCode8.4.Last Error Code saved during NO PLAY 8.5.Service mode table DVD-K29GCSDVD-K29GCS 8.7.2.Precautions 8.6.1.Setting8.6.2.Cancellation 8.6.Sales demonstration lock function9 Service Precautions 9.1.Recovery after the dvd player is repaired9.2.Firmware version-upof the DVD player 10.2. Important points in adjustment 10 ADJUSTMENT PROCEDURES10.1. Service Tools and Equipment 10.2.1. Important points in optical adjustment10.4.1.1. Adjustment procedure 10.4. Optical adjustment10.4.1. Optical pickup tilt adjustment 10.4.1.3. Check after adjustment10.4.1.4. Procedure for screw lock 11 Abbreviations INITIAL/LOGO 12.1 12 VOLTAGE CHARTMOTHER P.C.B DVD-K29GCSMODULE P.C.B 12.2DVD-K29GCS MIC P.C.B 12.3DVD-K29GCS DVD-K29GCS 13 BLOCK DIAGRAM 13.1. OVERALL BLOCK DIAGRAMSECONDARY CIRCUIT DVD-K29GCS POWER SUPPLY BLOCK DIAGRAMPRIMARY CIRCUIT IC600113.3. SERVO BLOCK DIAGRAM DVD-K29GCS SERVO BLOCK DIAGRAMDVD-K29GCS 13.4. VIDEO BLOCK DIAGRAM DVD-K29GCS VIDEO BLOCK DIAGRAMDVD-K29GCS VIDEO MAIN SIGNAL DVD-K29GCS VIDEO BLOCK DIAGRAMDVD-K29GCS VIDEO BLOCK DIAGRAM DVD-K29GCS13.5. AUDIO BLOCK DIAGRAM DVD-K29GCS AUDIO BLOCK DIAGRAMDVD-K29GCS 14.1. INTERCONNECTION SCHEMATIC DIAGRAM 14.2. SCHEMATIC DIAGRAM NOTES Important safety noticeImportant safety notice SCHEMATIC DIAGRAM 15 SCHEMATIC DIAGRAMPOWER SUPPLY SECTION A :POPOWER SUPPLY SECTIONB :F/AVFRONT & AV OUT SECTION A :POPOWER SUPPLY SECTIONSCHEMATIC DIAGRAM DVD-K29GCSDVD-K29GCS SCHEMATIC DIAGRAMSCHEMATIC DIAGRAM DVD-K29GCSDVD-K29GCS SCHEMATIC DIAGRAMSCHEMATIC DIAGRAM DVD-K29GCS15.3. MODULE SCHEMATIC DIAGRAM DVD-K29GCSMODULE SCHEMATIC DIAGRAMDVD-K29GCS IC8001RFKVDS39BKIT VIDEO MAIN SIGNAL DVD-K29GCSMODULE SCHEMATIC DIAGRAMSCHEMATIC DIAGRAM AUDIO MAIN SIGNAL15.4. MIC SCHEMATIC DIAGRAM 16.1. MOTHER P.C.B 16 PRINT CIRCUIT BOARDPOWER SW P.C.B MOTHER P.C.BMOTHER P.C.B 16.3. MODULE P.C.B. 1/2 COMPONENT SIDE MODULE P.C.B. 1/2COMPONENT SIDE 16.4. MODULE P.C.B. 2/2 FOIL SIDE MODULE P.C.B. 2/2FOIL SIDE 16.5. OPERATION P.C.B. & MIC P.C.B OPERATION P.C.BDVD-K29GCS 17 EXPLODED VIEWS DVD-K29GCS17.2. MECHANISM SECTION EXPLODED VIEW DVD-K29GCS17.3. PACKING & ACCESSORIES SECTION EXPLODED VIEW DVD-K29GCS18 REPLACEMENT PARTS LIST Part No Part No Part No Part No