SAMSUNG GY15VSSS Service Manual Troubleshooting
5-1 Troubleshooting (GY15VS*)
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
• 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 returns
to the factory preset.
5-1-1 No Power
CONFIDENTIAL
Does proper DC 13 V
appear at Pin 8, 9 of CN108?
Yes
Does proper DC 3.3 V
appear at Pin 5 of CN108?
Yes
Check IC106 and Q132.
No
No
Check IP Board or CN108.
Check IP Board.
(Inverter + Power Adaptor)
GY15VS*/GY17VS* 5-1
5 Troubleshooting
5-2-1 No Video
CONFIDENTIAL
Does the H-sync pulse
1
appear at Pin 43 of IC102?
Yes
Does the H-sync pulse
4
appear at Pin 34 of IC102?
Yes
Does the V-sync pulse
2
appear at Pin 44 of IC102?
Yes
Does the V-sync pulse
3
appear at Pin 33 of IC102?
Yes
No
No
No
No
Check CN190.
Replace IC102 or
check its related circuit.
Check CN190.
Replace IC102 or
check its related circuit.
Do the waveforms
5 6
appear at Pin 15
and 18 of CN101?
Replace LCD Panel.
Yes
No
Replace IC103 or
check its related circuit.
5-2 GY15VS*/GY17VS*
5 Troubleshooting
WAVEFORMS
1 2
CONFIDENTIAL
3
5
4
6
GY15VS*/GY17VS* 5-3
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