SAMSUNG GY17CSSS_EDC Service Manual Troubleshooting
5 Troubleshooting
Notes: 1. Before troubleshooting, setup the PC’s display as below.
• Resolution: 1280 x 1024
• H-frequency: 64 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: SMPS PCB, Main PCB
• 12V develop but no screen: Main PCB
• 12V does not develop: SMPS 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 No Power (GY17CS*)
When Pin 5 of CN101 is 0V
❇
does proper DC 13V, DC 5V
appear at Pin 1, 2 and Pin 6, 7 of
CN101 separately?
Yes
When Pin 3 of IC102 is
DC 5V does proper DC 3.3V
appear at Pin 4 of IC102?
Yes
When Pin 5 of IC101 is
DC 5V does proper DC 5V appear
at Pin 2, 3 of IC101?
Yes
When Pin 3 of IC103 is
DC 5V does proper DC 2.5V
appear at Pin 2 of IC103?
No
Change IP board.
No
Check IC102 and related circuit.
No
Check IC101 and related circuit.
No
Check IC103 and related circuit.
❇ 0V means power on state.
GY17CS*/GY17VS* 5-1
5 Troubleshooting
5-2-1 No Power (GY17VS* - Main 2)
When Pin 5 of CN101 is 0V
❇
does proper DC 13V, DC 5V
appear at Pin 1, 2 and 7 of
CN101 separately?
Yes
When Pin 2 of IC101 is 0V
does proper DC 3.3V appear at
Pin 7 and 8 of IC101?
Yes
When Pin 4 of IC101 is DC 2.5V
does proper DC 5V appear at
Pin 5 and 6 of IC101?
Yes
Does proper DC5V, DC 3.3 V
appear at Pin 3, 4 of IC102?
Yes
No
No
No
No
Change IP board.
Check IC101, IC102 and
related circuit.
Check IC101 and related circuit.
Check IC102 and related circuit.
When Pin 1 of IC103 is
DC 5V does proper DC 2.5V
appear at Pin 3 of IC103?
❇ 0V means power on state.
No
Check IC103 and related circuit.
5-2 GY17CS*/GY17VS*
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