Hitachi DVP 755 U Service Manual

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CONTENTS 1 CAUTION FOR SAFETY IN PERFORMING REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 -1 1-1 LASER BEAM SAFETY PRECAUTIONS . . . . . . . . . 1-1 1-2 IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . 1-2 1-2-1 Product Safety Notice . . . . . . . . . . . . . . . . . . . . . 1-2 1-2-2 Precautions during Servicing . . . . . . . . . . . . . . . .1-2 1-2-3 Safety Check after Servicing . . . . . . . . . . . . . . . . 1-3 1-3 STANDARD NOTES FOR SERVICING . . . . . . . . . . 1-4 1-3-1 Circuit Board Indications . . . . . . . . . . . . . . . . . . . 1-4 1-3-2 Instructions for Connectors . . . . . . . . . . . . . . . . . 1-4 1-3-3 Pb (Lead) Free Solder . . . . . . . . . . . . . . . . . . . . . 1-4 1-3-4 Instructions for Handling Semi-conductors . . . . . 1-4 2 GENERAL INFORMATION . . . . . . . . . . . . . . . .2-1 2-1 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-2 COMPARISON OF MODELS . . . . . . . . . . . . . . . . . . 2-2 2-3 COMPARISON OF MAIN CONTROL ICS . . . . . . . . 2-3 2-4 LIST OF ABBREVIATIONS AND TERMS FOR DVD PLAYER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2-5 OPERATING CONTROLS AND FUNCTIONS . . . . . 2-5 3 MAINTENANCE AND INSPECTION . . . . . . . . .3-1 3-1 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-2 HOW TO INITIALIZE THE DVD PLAYER . . . . . . . . . 3-7 3-3 FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . 3-8 3-3-1 How to Update the Firmware Version . . . . . . . . . 3-8 3-3-2 How to Verify the Firmware Version. . . . . . . . . . . 3-9 4 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . .4 -1 4-1 CABINET DISASSEMBLY INSTRUCTIONS. . . . . . . 4-1 4-1-1 Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . 4-1 4-1-2 Disassembly Method . . . . . . . . . . . . . . . . . . . . . . 4-1 4-1-3 How to Eject Manually . . . . . . . . . . . . . . . . . . . . . 4-3 5 EXPLODED VI EW AND PARTS LIST . . . . . . . 5-1 5-1 EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 5-2 REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . .5-2 5-2-1 Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . .5-2 5-2-2 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . .5-3 6 APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 6-1 SYSTEM CONTROL TIMING CHARTS . . . . . . . . . .6-1 6-2 IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . .6-2 6-3 LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . .6-3 S SCHEMATIC, WIRING DIAGRAMS. . . . . . . . . S-1 S-1 Schematic Diagrams / CBAs and Test Points . . . . S-1 S-2 Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-3 S-3 DVD Main 1/3 Schematic Diagram . . . . . . . . . . . . . S-4 S-4 DVD Main 2/3 Schematic Diagram . . . . . . . . . . . . . S-5 S-5 IC101 Voltage Chart . . . . . . . . . . . . . . . . . . . . . . . . S-6 S-6 DVD Main 3/3 Schematic Diagram . . . . . . . . . . . . . S-7 S-7 AV 1/3 Schematic Diagram . . . . . . . . . . . . . . . . . . . S-8 S-8 AV 2/3 Schematic Diagram . . . . . . . . . . . . . . . . . . . S-9 S-9 AV 3/3 & Function Schematic Diagram . . . . . . . . . S-10 S-10 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-11 C CIRCUIT BOARD DIAGRAMS C-1 AV CBA Top View . . . . . . . . . . . . . . . . . . . . . . . . . . C-1 C-2 AV CBA Bottom View . . . . . . . . . . . . . . . . . . . . . . . C-2 C-3 Function CBA Top/Bottom View . . . . . . . . . . . . . . . C-3 B BLOCK DIAGRAMS B-1 System Control/Servo Block Diagram . . . . . . . . . . . B-1 B-2 Digital Signal Process Block Diagram . . . . . . . . . . . B-2 B-3 Video/Audio Block Diagram. . . . . . . . . . . . . . . . . . . B-3 B-4 Power Supply Block Diagram . . . . . . . . . . . . . . . . . B-4

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1-1 1-1 LASER BEAM SAFETY PRECAUTIONS This DVD player uses a pickup that emits a laser beam. The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 30 cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam. CAUTION: Use of controls and adjustments, or doing procedures other than those specified herein, may result in hazardous radiation exposure. Location: Top of DVD mechanism. 1 CAUTION FOR SAFETY IN PERFORMING REPAIR Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin. Drive Mechanism Assembly Laser Beam Radiation Laser Pickup Turntable LASER RADIATION WHEN OPEN. DO NOT STARE INTO BEAM. CAUTION