Canon imageCLASS MF4890dw Service Manual page 295

4
Disassembly/Assembly > Controller System > Removing the Engine Controller PCB (MF4780w/MF4770n/MF4750/MF4730) > Procedure
Caution:
When connecting the terminal[1], be sure that the contact spring[2] is in contact with
it.
3)Remove the harness spring[1] from the hook[2], and free the harness[3] from the guide[A].
[1]
[2]
4 Disassembly/Assembly > Controller System > Removing the Engine Controller PCB (MF4780w/MF4770n/MF4750/MF4730) > Procedure
4)Remove the harness retaining spring[1], and free the harness from the guide[A].
• 2 flat cables[2]
• 6 connectors[3]
[1]
[2]
5)Remove the engine controller PCB[1].
F-4-570
• 5 screws(with washers)[2]
• 1 screw(with tooth lock washer)[3]
• 1 screw(black TP)[4]
• 1 hook[5]
[3]
[A]
F-4-571
x8
[A]
[3] [1]
[1]
x7
[3]
[4]
4-219
[2] [3]
F-4-572
[5]
[2]
[2]
F-4-573
4-219