參數(shù)資料
型號(hào)： GH19A*_191N
英文描述： Monitor_ICs:GM5020-01H NT7181 524C80D81 416S1020 NT68F63
中文描述： Monitor_ICs：GM5020 - 01H NT7181 524C80D81 416S1020 NT68F63
文件頁(yè)數(shù)： 15/38頁(yè)
文件大?。?/td> 985K
GH19A*
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 IC524and related circuit.
Check IC521.
Yes
No
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