SAMSUNG 171N
Manual de Servicio

5 Troubleshooting

CONFIDENTIAL

5-2 No Video
Check signal cable connection and power.

Does the X201 and X202 oscillate properly?
1 2

No

Replace that or check related circuit.

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 6

No

Check input part.

No

Please check the power related IC201 and output part.

Yes There proper signal input are Pin 27, 28, 30, and 31 of IC301, IC302?
5 3 4 6

No

Check IC301, IC302 and related circuit.

Yes No 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? No Please check the Inverter and related circuit. No Check the Power and related circuit. Check the LVDS_EN at R303 is high or not. Normal state is high.

GH17A*/GH17L***J

5-3