No Video - Samsung 171N Service Manual

5 Troubleshooting

5-2 No Video

Check signal cable connection and power.
Does the X201 and X202 oscillate properly?
1
Yes
There R, G, B input are at R103, R104 and R105?
Yes
There sync. and data output are
R212, R213, R214, R215, and RA201 ~ RA212?
3 4 5
Yes
There proper signal input are
Pin 27, 28, 30, and 31 of IC301, IC302?
5 3
Yes
Does the output signal appear at R304~R323?
Yes
There are DC 5V at Pin 1, 2 and 3 of CN301?
Yes
There are DC 12V, DC5V and DC 5V at
Pin 10, 11, 12 ; Pin 7 and Pin 4 of CN104?
GH17A*/GH17L***J
2
6
4 6
CONFIDENTIAL
No
Replace that or
check related circuit.
No
Check input part.
No
Please check the power related
IC201 and output part.
No
Check IC301, IC302 and
related circuit.
Check the LVDS_EN at
No
R303 is high or not.
Normal state is high.
No
Check the Power
and related circuit.
No
Please check the Inverter
and related circuit.
5-3