GH19B*
4-1
CONFIDENTIAL
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?
Change power apaptor.
Yes
No
Does proper DC 5V appear at
Pin 3 of IC522?
Check IC522 and related circuit.
Yes
No
Does proper DC 3.3V appear
at Pin 3 of IC523, IC510 and DC 2.5V
appear at Pin 3 of IC104?
Check IC523, IC510, IC104
and related circuit.
Yes
No
Does proper DC 5V,
appear at Pin 3 of IC524?
Check IC524 and related circuit.
Check IC521.
Yes
No
Summary of Contents for 191T - SyncMaster 19" LCD Monitor
Page 11: ...Memo 2 Product Specifications 2 8 GH19B CONFIDENTIAL...
Page 17: ...4 Troubleshooting 4 4 GH19B CONFIDENTIAL 4 5 6 7 8 9 10 11 12 13 14 15...
Page 19: ...Memo 4 Troubleshooting 4 6 GH19B CONFIDENTIAL...
Page 20: ...CONFIDENTIAL GH19B 5 1 5 Exploded View and Parts List...
Page 21: ...CONFIDENTIAL 5 Exploded View Parts List 5 2 GH19B Memo...
Page 30: ...7 Block Diagram GH19B 7 1 CONFIDENTIAL...
Page 31: ...CONFIDENTIAL 7 Block Diagrams 7 2 GH19B Memo...
Page 33: ...CONFIDENTIAL 8 Wiring Diagram 8 2 GH19B Memo...
Page 35: ...9 Schematic Diagrams 9 2 GH19B 12 13 14 15 CONFIDENTIAL...
Page 37: ...CONFIDENTIAL 9 Schematic Diagrams 9 4 GH19B 10 11...
Page 39: ...CONFIDENTIAL 9 Schematic Diagrams 9 6 GH19B 1 2 3 4 6 7 8 9 5...
Page 41: ...CONFIDENTIAL 9 Schematic Diagrams 9 8 GH19B Memo...
