Troubleshooting - No Power - Samsung SyncMaster 460DX Training Manual

Troubleshooting – No Power
Troubleshooting – No Power
Does 5.2 V appear at Pin #15 of CN602?
YES
Does DC 12V appear at BD643?
YES
Does DC 12V appear at C653?
YES
Does 3.3V appear at C622?
YES
Does DC 1.8V appear at C603?
YES
Does 3.3 V appear at Pin 16 ofCN602?
NO
NO
NO
1
Check the peripheral circuit of CN602
NO
2
NO
3
NO
4
C622
CN602
BD643
C603
C653
Check the SMPS Board.
Check the LCD Panel.
Replace IC602.
Replace IC601.
The Scaler(IC408) is abnormal.
Replace the main board.
1
.
2 4
3