Samsung SCX4521F - B/W Laser - All-in-One Service Manual page 58

5.18 Engine Shield (LIU PBA, SMPS)
1. Before you remove the Engine Shield, you should
remove:
- Scan Ass'y (Refer to the 5.9)
- Middle Cover (Refer to the 5.13)
2. Unplug the all Connectors from the SMPS and LIU
PBA.
3. Remove the six screws securing the Engine Shield
and release the Harness, as shown below. Then
carefully release the Engine Shield from the
Actuator Feed Sensor Lever.
Actuator Feed Sensor Lever
Samsung Electronics
LIU Cable
SMPS Cable
Fuser
Engine Shield
(W/LIU PBA, SMPS)
4. When if only remove the SMPS, first remove the
Rear Cover (refer to the 5.6) and unplug the Fuser
Connector and remove the six screws securing the
SMPS. Then unplug the Connector from the Main
PBA and carefully release the SMPS, as shown
below.
5. When if only remove the LIU PBA, first remove the
Rear Cover (refer to the 5.6) and remove the two
screws securing the LIU PBA. Then unplug the
Connector from the Main PBA and release the LIU
PBA as shown below.
LIU PBA
Disassembly and Reassembly
SMPS
Service Manual
5-21