Mitsubishi Electric LC62 CHASSIS XL6500LU, Руководство по обслуживанию

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DIAGNOSIS FLOW CHART
Image system
The terminal shield is used as GND when the terminal voltages and the waveforms are checked.
When replacing the PCB or the optical unit, follow the instructions in the service manual.
Is the lamp lit?
Is the indication of LEDs normal after power-on?
(POWER : Green, STATUS : Green)
Is the proper video signal supplied?
Is the image projected correctly?
NO
YES
NO
YES
NO
YES
Malfunction of the PCB-MAIN or the PCB-DRIVE.
Check the voltage waveforms of the SV, and SW
connectors on the PCB-MAIN respectively.
Check the voltage waveforms of the DR, DG,and DB
connectors on the PCB-DRIVE respectively.
* Malfunction of the LCD panel when the
above-mentioned voltage waveforms are OK.
Malfunction of the analog/digital circuit around the input
terminal of the computer.
[Analog input]
(PCB-TERMINAL/PCB-MAIN)
Check the video signal circuits around J600, J603,
IC610 (PCB-TERMINAL), and IC6A0 (PCB-MAIN).
Check the sync signal circuits around J600, J603,
IC551, IC552, IC561 (PCB-TERMINAL), and IC6A0
(PCB-MAIN).
[DVI-D input]
Check the video signal circuits around J6P0, and
IC6A0.
Check the DDC interface circuits around J6P0, IC6M0,
and IC6C5.
Malfunction of the circuit around the video
input terminal.
Check the video signal circuits around J210,
J211, IC230, IC231 (PCB-TERMINAL), and
IC2A0 (PCB-MAIN).
A malfunction has occurred in the digital signal processing circuit.
Check the digital signal circuit around IC440.
(SDRAM IC400, IC401, IC402, IC403)
Images are not
projected properly.
Is the menu projected
normally?
NO
Are the full-white,
full-black, monochrome
R, G, and B test signals
projected normally?
Are images from
the computer
projected normally?
Are video images
projected normally?
!
!
!
Malfunction of the PCB-DRIVE.
Are the DR, DG, and DB connectors inserted properly?
Is the voltage at the DP connector OK?