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FILE NO. 020-200401 REVISED.2

SERVICE MANUAL

Projection Television

46HM84 52HM84 62HM84

Published in Japan, Jan. 2005 (YC)

TABLE OF CONTENTS
CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS .............................................................................................................................................. 3 SERVICE MODE............................................................................................................................................................ 4 CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA ...................................................................................................................................... 7 LOCATION OF CONTROLS........................................................................................................................................... 8 PROGRAMMING CHANNEL MEMORY ....................................................................................................................... 10 LAMP UNIT REPLACEMENT ....................................................................................................................................... 12 LIGHTENGINE REPLACEMANT................................................................................................................................. 15 PARTS REPLACEMENT IN LIGHT ENGINE............................................................................................................... 17 EXPLODED VIEW........................................................................................................................................................ 19 MECHANICAL DISASSEMBLY .................................................................................................................................... 20 CHASSIS REPLACEMENT PARTS LIST ..................................................................................................................... 21 PC BOARDS TOP ANDBOTTOM VIEW ..................................................................................................................... 29 TERMINAL VIEW OF TRANSISTORS ......................................................................................................................... 41 CIRCUIT BLOCK DIAGRAM........................................................................................................................................ 44 SPECIFICATIONS .................................................................................................................................................... END APPENDIX: CIRCUIT DIAGRAM

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CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS
SAFETY PRECAUTION WARNING: Service should not be attempted by anyone unfamiliar with thenecessary precautions on this receiver. The following are the necessary precautions to be observed before servicing this chassis. 1. An isolation transformer should be connected in the power line between the receiver and the AC line before any service is performed on the receiver. 2. When replacing a chassis in the cabinet, always be certain that all the prospective devices are put back in place, such as;non-metallic control knobs, insulating covers, shields, isolation resistor-capacitor network etc.

PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using replacement components ratedfor higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are identified by the international hazard symbols on the schematic diagram and the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitute...
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