JVC LX-D1010G - Lcd Projector Service Manual page 58

LX-D1010G
7) Video system
When the video does not appear normally
Is the Menu
display normal?
Yes
Is the input video signal
displayed normally?
Is the input computer
signal displayed normally?
The digital signal process circuit is failed.
・ Check the digital signal line around of the IC400.
(SGRAM R: IC4J0, IC4P0, G: IC4G0, IC4M0, B: IC4H0, IC4N0)
・ There is no problem if the shield metal is used for the secondary terminal voltage and ground (GND) during waveform
monitoring.
・ Adjust based on 7. Circuit Adjustment Method (refer to page 7-1) and 4. Removing Major Parts (refer to page 4-8)
when either the Main PWB Ass'y or the part of the Optical Ass'y has been replaced.
12-8 (PA012)
No
No
！ ！ ！ ！ Check the Lamp lighted.
！ ！ ！ ！ Check the indicator lights normally when the main
power switch is turned on.
(POWER: Green, LAMP: Green)
！ ！ ！ ！
Check that the input signal is normally and
appropriate.
The Drive Circuit failure
・ Check the waveform at each terminal of the SRX,
SGX and SBX connectors.
・ Check the video signal line around IC800-804,
No
IC8A0-8A4 and IC8M0-8M4D.
・ Check the panel-control line around IC5A0-5A4.
※ If the waveforms are normally, the LCD Panel is
failed.
※ If input signal is displayed normally and Menu
display is abnormal, check the around of the
SGRAM: IC4S0.
The input analog circuit
for the computer terminal is failed.
Yes
・ Check the video signal line around J200 and
IC600.
・ Check the sync signal line around J200, IC240,
IC500, IC530, and IC600.
The input analog circuit
for the video terminal is failed.
・ Check the video signal line of the Video PWB
Yes
Ass'y.
・ Check the around of the IC2A2.