Canon imageCLASS MF4890dw, Service Manual, Page: 243 / 511

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Disassembly/Assembly > Controller System > Removing the Paper Leading Edge Sensor PCB(MF4870dn/MF4830d) > Proce
d
ure
Disassembly/Assembly > Controller System > Removing the Paper Leading Edge Sensor PCB(MF4870dn/MF4830d) > Proce
d
ure
Removing the Paper Leading Edge Sensor
PCB(MF4870dn/MF4830d)
■ Preparation
1) Remove the left cover
2)Remove the SADF unit and reader unit.
3)Remove the right cover
4)Remove the front cover unit.
5)Remove the upper cover.
6)Remove the duplex feed unit.
7)Remove the main controller PCB
8)Remove the FAX NCU PCB.(MF4870dn)
■ Proce
d
ure
(MF4870dn)
1)Remove the main controller mounting plate[1]
• 4 screws(with washer)[2]
• 2 screws(black TP)[3]
x6
[1] [2]
[3] [2]
(MF4830d)
1)Remove the main controller mounting plate[1]
• 1 screw(with washers)[2]
• 1 screw(black TP)[3]
F-4-412
x2
[1]
[2] [3]
2)Disconnect the terminal[1], free the harness[2] from the harness guide[A], and then put it
through the hole[B].
[1] [2]
[A]
[2] [B]
F-4-413
F-4-414