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Hitachi DVP 323 U Service Manual
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Extracted text from Hitachi DVP 323 U Service Manual (Ocr-read)
Page 1
CONTENTS
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1-1
COMPARISON OF MODELS . . . . . . . . . . . . . . . . . . . . . . .1-2-1
LASER BEAM SAFETY PRECAUTIONS. . . . . . . . . . . . . .1-3-1
IMPORTANT SAFETY PRECAUTIONS. . . . . . . . . . . . . . .1-4-1
Product Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4-1
Precautions during Servicing . . . . . . . . . . . . . . . . . . . . . .1-4-1
Safety Check after Servicing . . . . . . . . . . . . . . . . . . . . . .1-4-2
STANDARD NOTES FOR SERVICING . . . . . . . . . . . . . . .1-5-1
Circuit Board Indications . . . . . . . . . . . . . . . . . . . . . . . . .1-5-1
Instructions for Connectors . . . . . . . . . . . . . . . . . . . . . . .1-5-1
How to Remove/Install Flat Pack-IC . . . . . . . . . . . . . . . .1-5-1
Instructions for Handling Semi-conductors . . . . . . . . . . .1-5-3
ORERATING CONTROLS AND FUNCTIONS. . . . . . . . . .1-6-1
CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . . . .1-7-1
1. Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . . . . .1-7-1
2. Disassembly Method . . . . . . . . . . . . . . . . . . . . . . . . . .1-7-1
ROM RENEWAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8-1
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9-1
BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-1
System Control Block Diagram . . . . . . . . . . . . . . . . . . .1-10-1
RF Signal Process/Servo Block Diagram . . . . . . . . . . .1-10-2
DVD Signal Process Block Diagram . . . . . . . . . . . . . . .1-10-3
Video Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-4
Audio Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-5
Power Supply Block Diagram . . . . . . . . . . . . . . . . . . . .1-10-6
SCHEMATIC DIAGRAMS/CBAS AND
TEST POINTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-1
DVD Main 1/4 Schematic Diagram . . . . . . . . . . . . . . . .1-11-3
DVD Main 2/4 Schematic Diagram . . . . . . . . . . . . . . . .1-11-4
DVD Main 3/4 Schematic Diagram . . . . . . . . . . . . . . . .1-11-5
DVD Main 4/4 Schematic Diagram . . . . . . . . . . . . . . . .1-11-6
AV 1/3 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . .1-11-7
AV 2/3 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . .1-11-8
AV 3/3, Function & Switch Schematic Diagram . . . . . .1-11-10
AV CBA Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-11
AV CBA Bottom View. . . . . . . . . . . . . . . . . . . . . . . . . .1-11-12
Function CBA Top View . . . . . . . . . . . . . . . . . . . . . . . .1-11-13
Function CBA Bottom View . . . . . . . . . . . . . . . . . . . . .1-11-13
Switch CBA Top View . . . . . . . . . . . . . . . . . . . . . . . . .1-11-13
Switch CBA Bottom View . . . . . . . . . . . . . . . . . . . . . . .1-11-13
WAVEFORMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-9
WIRING DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12-1
SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . . .1-13-1
IC PIN FUNCTION DESCRIPTIONS. . . . . . . . . . . . . . . . .1-14-1
LEAD IDENTIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . .1-15-1
EXPLODED VIEWS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16-1
MECHANICAL PARTS LIST. . . . . . . . . . . . . . . . . . . . . . .1-17-1
ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . .1-18-1
Page 2
1-1-1
SPECIFICATIONS
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and the double-D symbol are trademarks of Dolby
Laboratories. Confidential Unpublished Works.
(1992-1997 Dolby Laboratories, Inc. All rights reserved.)
"DTS" and "DTS Digital Out" are trademarks of Digital Theater Systems Inc.