Canon imageRUNNER ADVANCE 4551i Service Manual page 264

2. Pull out the Laser Scanner Unit [1].
• 2 Connectors [2]
CAUTION:
• Do not touch the PCB on the Laser Scanner Unit [1].
• Do not move the volume resistor on the PCB.
3. Remove the Laser Scanner Unit [1].
• 2 Connectors [2]
• 2 Sponges [3]
4. Actions after Replacement:
2x
2x
[1]
"Actions after Replacement" on page 328
251
[2]
[1]
[2]
[3]
4. Disassembly/Assembly
[1]