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MITSUBISHI ELECTRIC
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
Digital Light ProcessingTM
Projection Television
Technical
Training
DL1 Chassis
2002
Theory of Operation
Circuit Descriptions
Block Diagrams
Models
WD-65000 & WD-65100
www.mitsubishi-tv.com
WD-65000 Training Manual
CONTENTS
Chapter 1 - Introduction ............................................................................................................... 1-1
Chapter 2 - Digital Light ProcessingTM System ........................................................................... 2-1
DLP System ....................................................................................................................... 2-1
Basic Signal Processing ..................................................................................................... 2-4
Interlace to Progressive Scan Conversion ............................................................................ 2-5
Formatter ............................................................................................................................ 2-7
Chapter 3 - Disassembly ............................................................................................................... 3-1
Cabinet Front Disassembly ................................................................................................. 3-2
Cabinet Rear Disassembly .................................................................................................. 3-2
Module Disassembly .......................................................................................................... 3-3
Chassis Assembly .............................................................................................................. 3-4
Chapter 4 - Lamp Replacement & Filter Cleaning ..................................................................... 4-1
Lamp Box Removal ............................................................................................................. 4-2
Lamp Box Installation ......................................................................................................... 4-3
Air Filter Cleaning ............................................................................................................... 4-4
Chapter 5 - Option Menu & LED Diagnostic Mode ...................................................................... 5-1
Option Menu ....................................................................................................................... 5-1
LED Diagnostic Mode ......................................................................................................... 5-3
Chapter 6 - Optical Unit Adjustments ........................................................................................... 6-1
Required Disassembly ........................................................................................................ 6-2
Preparation for Adjustment .................................................................................................. 6-3
Adjustment and Locking Screws ......................................................................................... 6-5
Adjustments ....................................................................................................................... 6-6
Chapter 7 - Electrical Adjustments ............................................................................................... 7-1
Service Adjustment Mode ................................................................................................... 7-1
Adjustment Functions ......................................................................................................... 7-2
Function Tables .................................................................................................................. 7-3
Test Points ......................................................................................................................... 7-5
Auto Adjust ......................................................................................................................... 7-5
Chapter 8 - Power Supply ............................................................................................................ 8-1
Standby Supply Regulator .................................................................................................. 8-1
Standby Supplies ................................................................................................................ 8-2
Lamp Power Supply ............................................................................................................ 8-2
Switched Supplies .............................................................................................................. 8-2
Power Loss Detection (AC Off) ........................................................................................... 8-4
Short Protect ...................................................................................................................... 8-5
Chapert 9 - Video/Color Signal Path ........................................................................................... 9-1
NTSC Signal Selection ....................................................................................................... 9-2
Main Picture Video/Color Signal Path ................................................................................. 9-3
Sub Picture Video/Color Signal Path ................................................................................... 9-4
PCB-DSP Video/Color Signal Path ..................................................................................... 9-5
Chapter 10 - Control Circuitry ..................................................................................................... 10-1
PCB-SIGNAL Control Circuitry ................................................................................................... 10-1
V-Chip Circuitry ................................................................................................................ 10-2
On Screen Display (OSD) Insertion ................................................................................... 10-3
Lamp Control .................................................................................................................... 10-3
Page 1
WD-65000 Training Manual
Chapter 11 - Sync Signal Path ................................................................................................... 11-1
PCB-SIGNAL Sync Path ............................................................................................................ 11-1
Sync Detector circuits ...................................................................................................... 11-2
PCB-DSP Sync Signal Path ...................................................................................................... 11-3
Sync Output Circuitry ....................................................................................................... 11-5
Chapter 12 - Sound Signal Path ................................................................................................ 12-1
Sound Signal Selection ..................................................................................................... 12-1
Main and Sub Audio Signal Paths ..................................................................................... 12-3
Page 2
Chapter 1
Introduction
DMDTM
Lens
Lamp
Color Filter
Athough user operation is similar to other Projec- DeviceTM (DMDTM). The DLPTM system is described
tion TVs, the new WD-65000 Projection TV has in detail in Chapter 2.
major differences. It produces the highest quality
picture possible in the current Projection TV mar- The WD-65000 is compatible with most TV signal
ket. To achieve this high quality picture the CRTs formats. This is illustrated in Figure 1-1. It is com-
are replaced with a Digital Light Processing TM patible with:
(DLPTM) System.