No Picture - Sanyo PLC-XU350A Service Manual
Multimedia projector
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Also See for PLC-XU350A:
- Owner's manual (168 pages) ,
- Specification sheet (2 pages) ,
- Brochure & specs (2 pages)
Table of Contents
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Troubleshooting
No Picture
check following steps.
No picture with all of
input sources
No
No picture with Pc1
[Analog] input source
only
No
No picture with Pc2
[Analog] input source
only
No
No picture with all of
computer input sources
No
No picture with video
input sources
Yes
Check signal processing stage and LCD driving stage;
Check RGB S&H signals at test points TP35B, TP35G, TP35R.
Check power supply circuit 15.5V and peripheral circuit.
Check ICs IC501, IC531, IC561, IC401, IC301 and peripheral circuits.
Yes
Check IC5301, Q1001, Q100 and Q1005.
Yes
Check IC5304, Q1003, Q1004 and Q1006.
Yes
Check PC/AV source selecting stage and processing stage;
Check IC301<Scaler> and peripheral circuit.
Check AV source selecting and decoding stage;
S-Video source
Check S-video signal (Y/C).
S_CHROMA signal is applied to pin 65 of IC301<Scaler>, and S-Y
signal is applied on pin 64 of IC301.
S_SW signal (S-VIDEO:L) is input to pin 67 of IC301<Scaler>.
Composite video source
Check composite video signal (Video).
The composite video signal is applied to pins 6 of IC301 <Scaler>.
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