Text preview for : Cover-TOC.pdf part of Mitsubishi VS-50805, WT-60805, WS-55905, WS-65905, WS-73905, WS-55805, WT-46805 Mitsubishi VS-50805, WT-60805, WS-55905, WS-65905, WS-73905, WS-55805, WT-46805 (Chassis V16 N W) (Training Manual + Schematic)
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MITSUBISHI ELECTRIC
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
V16 Chassis Technical Training Manual
T 2000
ECHNICAL RAINING
HDTV 1080i Capable DVD 480p Capable
WS-55805
VS-50805 VS-60805
WS-55905 WS-65905 WS-73905
WT-46805
V16N 4:3
V16W 16:9
Features Service Procedures Block Diagrams
Alignments Circuit Descriptions Troubleshooting
www.mitsubishi-tv.com
Table of Contents
Introduction ........................................................................................ I Chapter 1 - Service Procedures ...................................................... 1-1
Disassembly ............................................................................................................................................ 1-3 PCB Functions and Locations .............................................................................................................. 1-8
Chapter 2 - Alignment Procedures ................................................ 2-1
Initial Setup ............................................................................................................................................ 2-3 Circuit Adjustment Mode ..................................................................................................................... 2-4 Convergence Adjustment Mode ........................................................................................................... 2-6 Raster Geometry and Convergence Alignment Procedures .............................................................. 2-9
Chapter 3 - Power Supplies ............................................................ 3-1
Standby Power Supply .......................................................................................................................... 3-3 Switched Power Supply ......................................................................................................................... 3-5
Chapter 4 - Control Circuit ............................................................ 4-1
Control Circuit Overview...................................................................................................................... 4-3 µPC Basic Requirements ....................................................................................................................... 4-3 I2C Lines ................................................................................................................................................. 4-3 Control Interface Circuitry ................................................................................................................... 4-6 I/O Port Expander ................................................................................................................................. 4-7 Parallel Inputs/Outputs ......................................................................................................................... 4-7 AC-Off Circuit ....................................................................................................................................... 4-8 Troubleshooting ..................................................................................................................................... 4-8
Chapter 5 - Video-Color Signal Processing................................... 5-1
Overall Video-Color Signal Path .......................................................................................................... 5-3 PCB Interface ......................................................................................................................................... 5-4 Signal Processing by PCB ..................................................................................................................... 5-5
Chapter 6 - Sync, Deflection and High Voltage ............................ 6-1
Basic Block Diagram ............................................................................................................................. 6-3 Sync Block Diagram .............................................................................................................................. 6-4 Deflection Drive ..................................................................................................................................... 6-7 Horizontal Deflection ............................................................................................................................. 6-8 High Voltage ........................................................................................................................................... 6-9
Chapter 7 - Convergence ................................................................ 7-1
Convergence Block Diagram ................................................................................................................ 7-3 Input Buffer Circuit .............................................................................................................................. 7-5 Convergence Output Circuitry ............................................................................................................. 7-5 PCB-CONV Signal Path ....................................................................................................................... 7-6 Convergence Control Circuitry ............................................................................................................ 7-8 Edge Convergence Enhancement ......................................................................................................... 7-9 Convergence Shutdown Control ........................................................................................................ 7-10
Chapter 8 - Audio ........................................................................... 8-1
Audio Block Diagram ............................................................................................................................ 8-3