6 troubleshooting, 1 no power – Samsung 330TFT User Manual

Page 21

SyncMaster 33*TFT/53*TFT

6-1

6 Troubleshooting

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

• Resolution: 1024 x 768
• H-frequency: 48 kHz
• V-frequency: 60 Hz

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

3. Check the following circuits.

• No raster appears: Audio PCB, SMPS PCB, Main PCB (SyncMaster 330TFT/550TFT)

Stand PCB, Main PCB (SyncMaster 331TFT/531TFT)

• 12V develop but no screen: Main PCB
• 12V does not develop: Audio PCB, SMPS PCB (SyncMaster 330TFT/530TFT)

Main PCB (SyncMaster 331TFT/531TFT)

4. If you push and hold the “EXIT” button for more than 5 seconds, the monitor automatically turns back

to the factory preset.

6-1 No Power

Does proper DC 12 V appear at

DC jack connected to CN102?

Check Stand PCB.

Yes

Does proper DC 5 V appear at

Pin 3 of IC109?

Check F101 and IC109.

Check IC401, RL101, D110 and Q101.

Yes