Samsung WC-M15i Series Service Manual page 78

Error code 3-100
Fault No power
Description
When system power is turned on, all lamps on the operator panel do not come on.
Check
Engine board
Cause
1. Defective harness between engine and control boards.
2. Defective harness between the control board and panel.
3. Defective fuse F151
4. Defective fuse F101
5. BD101 short. Check for the resistance value of Q102.
6. Defective U101
Solution
1. Check the connection between engine and control boards, and replace, if defective.
2. Check the connection between control board and operator panel. If defective, replace the harness.
3. Check F151 on the engine board. If open, measure the resistance between 5V and ground. If it is
below 50 ohm, it is short.
4. Check F101 on the engine board. If open, check also :
- R114 open
- Q102, D-S, G-D, or G-S short
- Defective BD101
Remark
Others
Samsung Electronics
Troubleshooting
Model ML-6100
5-41