Service manual

4. Alignment and Troubleshooting
Service Manual
ML-551x / 651x series
4-43
Samsung Electronics
3. Engine Board is defective.
- Unplug all connectors on the Engine Board.
- Remove 4 screws.
- Replace the Engine Board with new one.
Remove all the connectors.Remove all the connectors.
4. Fuser BLDC Motor is defective.
- Remove the Main Drive unit. (Screw 5 EA, Lever Coupler)
- Remove the Engine Board & Engine Board bracket.
- Remove the Main Board & Main Board bracket.
- Remove the Rear Cover and duplex unit.
- Remove the fuser unit.
- Replace the fuser drive unit with new one.
Main Drive unit Main Board
Engine board & Bracket
Main Drive unit Main Board
Engine board & Bracket