Mitsubishi Electric HD-4001, Service Manual

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MODEL: HD-4001
Page 3
INTRODUCTION ................................................................................................................................ 5
PRODUCT SAFETY NOTICE ............................................................................................................. 5
SAFETY PRECAUTIONS ................................................................................................................... 6
PWB-LOCATIONS ............................................................................................................................. 7
DISASSEMBLY .................................................................................................................................. 8
Top Cover removal .................................................................................................................. 8
PWB-SIGNAL & PWB-TERMINAL Removal ........................................................................... 9
Signal Bracket Removal ....................................................................................................... 10
Rear Panel Removal ............................................................................................................. 11
Card Reader Removal & Front Panel Removall ..................................................................... 12
ELECTRICAL ADJUSTMENTS ........................................................................................................ 13
Equipment .................................................................................................................................... 13
Option Menu / Initialization Defaults / AV Defaults ......................................................................... 14
LED Diagnostics ........................................................................................................................... 15
Remote Control Operational Mode ................................................................................................ 15
Circuit Adjustment Mode ............................................................................................................... 16
Transfering data ............................................................................................................................ 17
Adjustment Items List ................................................................................................................... 17
Adjustment Procedures ................................................................................................................ 18
Test Points .......................................................................................................................... 18
Main-Y Gain ......................................................................................................................... 18
Sub-Y Gain .......................................................................................................................... 19
Sub Picture Offset ............................................................................................................... 19
CHIP PARTS REPLACEMENT ......................................................................................................... 20
REPLACEMENT PARTS .................................................................................................................. 21
Parts Ordering .............................................................................................................................. 21
Critical and Warranty Parts Designation ........................................................................................ 21
Parts Tolerance Codes .................................................................................................................. 21
SERVICE PARTS LIST .................................................................................................................... 22
CIRCUITRY BLOCK DIAGRAMS ..................................................................................................... 31
Standby Power Supplies ............................................................................................................... 31
PWB-DM Power Supplies ............................................................................................................. 32
PWB-SIGNAL Switched Power Supplies ...................................................................................... 32
Tuners & Analog Video Select Circuitry ......................................................................................... 33
Digital Video Signal Path .............................................................................................................. 34
Sync Signal Selection ................................................................................................................... 35
Sync Signal Output Path .............................................................................................................. 35
Sound Signal Path ........................................................................................................................ 36
Control Circuitry ............................................................................................................................ 37
Command Input Circuitry ............................................................................................................... 38
Macrovision Detection ................................................................................................................... 38
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