Samsung 191T - SyncMaster 19" LCD Monitor Посібник з експлуатації - Сторінка 14

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4-1 Troubleshooting

Notes: 1. Before troubleshooting, setup the PC's display as below.

• Resolution: 1280 x 1024

• H-frequency: 63 kHz

• V-frequency: 75 Hz

2. If no picture appears, make sure the power cord is correctly connected.

3. Check the following circuits.

• No raster appears: Stand PCB, Main PCB

• 12V develop but no screen: Main PCB

• 12V does not develop: Main PCB

4. If you push and hold the Exit(–) button for more than 5 seconds, the monitor automatically turns back

to the factory preset.

4-1-1 No Power

Does proper DC 12V appear at

Pin 1, 2 of CN503?

Yes

Does proper DC 5V appear at

Pin 3 of IC522?

Yes

Does proper DC 3.3V appear

at Pin 3 of IC523, IC510 and DC 2.5V

appear at Pin 3 of IC104?

Yes

Does proper DC 5V,

appear at Pin 3 of IC524?

Yes

Check IC521.

GH19B*

Change power apaptor.

Check IC522 and related circuit.

Check IC523, IC510, IC104

and related circuit.

Check IC524 and related circuit.

CONFIDENTIAL

4-1