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Troubleshooting
No Picture
Check following steps.
No picture with all of
input sources
No
No picture with PC1[DVI
digital] input source
No
No picture with PC1 [DVI
analog] input source
No
No picture with PC2 [VGA
analog] input source
No
No picture with all of
computer input sources
No
Go to next page
Yes
Check signal processing stage and LCD driving stage;
Check RGB S&H signals at test points TPVIDEOB, TPVIDEOG,
TPVIDEOR.
Check NRS signals at test points TPNRS and TPZNRS.
Check power supply circuit 15.5V and peripheral circuit.
Check ICs IC501, IC531, IC561, IC401, IC301 and peripheral circuits.
Yes
Check DVI interface stage;
Check IC8001<DVI-I/F>, IC201<A/D Conversion> and peripheral cir-
cuit.
Check DVI selection signal, DVI_OUT, output from pin19 of IC1366
<D/A>. DVI: Low
Yes
Check PC source selecting stage;
Check IC5201<PC1/PC2-SW> and peripheral circuit.
PC1/PC2_SW signal (PC1: L) is output from pin 17 of IC1366<D/A>
and applied to pin 26 of IC5201. Check test points TP-CGR, TP-CGG,
TP-CGB.
Check IC5301<SYNC DET>, IC8261<SYNC SW>, and check test
points TPGHS and TPGVS.
Yes
Check PC source selecting stage;
Check IC5201<PC1/PC2-SW> and peripheral circuit.
PC1/PC2_SW signal (PC1: L) is output from pin 17 of IC1366<D/A>
and applied to pin 26 of IC5201. Check test points TP-CGR, TP-CGG,
TP-CGB.
Check IC IC4001<RGB-OUT>, IC4021<I/O-SW>, IC4031<SYNC-
SW>. IN/OUT-SW signal (OUT-L) is output from pin
IC1366<D/A> and applied to IC4001, IC4021 and IC4031.
Check IC5301<SYNC DET>, IC8261<SYNC SW>, and check test
points TPGHS and TPGVS.
Yes
Check PC/AV source selecting stage and processing stage;
Check IC5201<PC1/PC2-SW> and peripheral circuit.
Check IC5301<SYNC DET>, IC8261<SYNC SW>, and check test
points TPGHS and TPGVS.
Check IC201 <A/D> and peripheral circuit.
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