Ip Board (Power) - Samsung 740NW Service Manual

4 Troubleshooting

4-3 IP BOARD (POWER)

Check the
protection system
4-6
Power On
Check fuse
3 pin of FDM0565R
Vcc system in normal: HIGH
1 pin of FDM0565R
Check the drain system
Normal: Switching
No
Check the output current
Check others
Harness, Inlet
No
Yes
No
Yes
No
Yes
No
Yes
Change FUSE
Check the Vcc system
Check the main switching
Check the
feedback system