Canon iR2018 Series, Service Manual

Page: 92 / 348

Chapter 3
3-8
3.5 Parts Replacement Procedure
3.5.1 Main Controller PCB
3.5.1.1 Preparation for Removing the Image Processor
PCB
0017-2248
1) Detach the rear cover.
(page 9-4)
Reference[Removing the Rear Cover]
2) Detach the rear left cover. (page 9-4) Reference[Removing the Rear Left
Cover]
3.5.1.2 Removing the Image Processor PCB
0017-2249
1) Change the position of the jumper plug (JP100) [1] on the modem PCB
(capacitor PCB).
F-3-13
2) Detach the RAM cover [1].
- 5 screws [2]
F-3-14
3) Detach the SDRAM.
(page 3-11)
Reference[Removing the SDRAM]
4) Detach the LAN cover [1].
- 6 screws [2]
F-3-15
5) Disconnect the connector [1] of the IP-LAN cable.
F-3-16
6) Detach the modem PCB or the capacitor PCB [1].
In the case of the modem PCB
- 3 connectors [2]
- 2 screws [3]
If disconnecting/connecting the modem PCB (capacitor PCB) without
implementing this operation, the SDRAM may be broken.
When turning off the main power switch and disconnecting the power plug
from the power outlet, the power is supplied between the SDRAM and the
super capacitor for image memory backup.
If the jumper plug (JP100) is disconnected with the image being backed up,
the contents in the memory are all cleared. Be sure to output all data in the
memory before disconnecting the jumper plug (JP100).
MEMO:
The jumper plug is small. A needlenose pliers or tweezers may be useful in
this operation. To prevent short-circuit, avoid contact of the jumper pin to a
nearby metal through the tool.
[1]
[1] [1]
[2]
[1]
[2]
[2]
[1]