GH15DS
4-1
4 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: 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(GH15DS).
4-1 Power
Does proper DC 12 V
appear at CN100?
Check Power Adaptor.
Yes
No
Does proper DC 5 V appear at
output Pin of IC100?
Check IC100 and related circuit.
Check IC101, IC102, IC601, IC401
and related circuit.
Yes
No
Yes
Does proper 3.3 V - signals
appear at output Pin of IC103?
Check IC103 and related circuit.
No
Yes
Does proper 3.3 V - signals
appear at Pin 7 of CN100?
Check CN100-7 and related circuit.
No
Yes
Does proper 3.3 V - signals
appear at R300?
Check IC301 and related circuit.
No
Summary of Contents for GH15DS
Page 7: ...2 Product Specifications 2 4 GH15DS Table 2 2 Timing Chart ...
Page 11: ...Memo 3 Disassembly and Reassembly 3 4 GH15DS ...
Page 15: ...Memo 4 Troubleshooting 4 4 GH15DS ...
Page 16: ...GH15DS 5 1 5 Exploded View and Parts List ...
Page 17: ...5 Exploded View Parts List 5 2 GH15DS Memo ...
Page 23: ...6 Electrical Parts List 6 6 GH15DS Memo ...
Page 24: ...7 Block Diagram GH15DS 7 1 ...
Page 25: ...Memo 7 Block Diagrams 7 2 GH15DS ...
Page 27: ...8 Wiring Diagram 8 2 GH15DS Memo ...
Page 29: ...9 Schematic Diagrams 9 2 GH15DS 1 D201 2 D208 5 IC401 32 6 IC401 40 3 IC401 30 4 IC401 31 ...
