User Guide
Table Of Contents
- DVD-800
- COVER
- SPECIFICATIONS
- 1. SAFETY PRECAUTIONS
- 2. PREVENTION OF ELECTRO STATIC DISCHARGE (ESD) TO ELECTROSTATICALLY SENSITIVE (ES) DEVICES
- 3. PRECAIUTION OF LASER DIODE
- 4. DISASSEMBLING THE CASING AND CHECKING PCBs
- 5. PREVENTION OF STATIC ELECTRICITY DISCHARGE
- 6. OPTICAL PICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE
- 7. SELF-DIAGNOSIS FUNCTION AND SERVICE MODES
- 8. ASSEMBLING AND DISASSEMBLING THE MECHANISM UNIT
- 9. ADJUSTMENT PROCEDURES
- 10. ELECTRICAL CONFIRMATION
- 11. ABBREVIATIONS
- 12. VOLTAGE CHART
- 13. BLOCK DIAGRAM
- 14. SCHEMATIC DIAGRAM
- 14.1. INTERCONNECTION
- 14.2. POWER SECTION [MOTHER P.C.B. (1/7)]
- 14.3. VIDEO OUT SECTION [MOTHER P.C.B. (2/7)]
- 14.4. VIDEO OUT SECTION [MOTHER P.C.B. (3/7)] (only Europe)
- 14.5. AUDIO OUT 1 SECTION [MOTHER P.C.B. (4/7)]
- 14.6. AUDIO OUT 2 SECTION [MOTHER P.C.B. (5/7)]
- 14.7. AUDIO OUT 2 SECTION [MOTHER P.C.B. (6/7)]
- 14.8. OPERATION SECTION [MOTHER P.C.B. (7/7)]
- 14.9. ADSC SECTION [MODULE P.C.B. (1/7)]
- 14.10. AV DECORDER SECTION [MODULE P.C.B. (2/7)]
- 14.11. AV DECORDER SECTION [MODULE P.C.B. (3/7)] (only Europe)
- 14.12. VIDEO D/A CONVERTER SECTION [MODULE P.C.B. (4/7)]
- 14.13. AUDIO D/A CONVERTER SECTION [MODULE P.C.B. (5/7)]
- 14.14. CPU SECTION [MODULE P.C.B. (6/7)
- 14.15. ODC SECTION [MODULE P.C.B. (7/7)]
- 14.16. TERMINAL
- 14.17. SCART (only Europe)
- 14.18. FRONT 1 AND FRONT 2
- 15. PRINT CIRCUIT BOARD
- 16. EXPLODED VIEWS
- 17. NOTE FOR PARTS LIST
- 18. PARTS LIST OF P.W.B. UNIT ASS'Y
5 PREVENTIONOFSTATICELECTRICITYDISCHARGE
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. Groundingforelectrostaticbreakdownprevention
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. Worktablegrounding
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. Humanbodygrounding
1. Use the anti-static wrist strap to discharge the static electricity form your body.
5.1.3. Handlingofopticalpickup
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. HandlingPrecautionsforTraverseUnit(OpticalPickup)
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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