Canon imageRUNNER ADVANCE 4551i Service Manual page 204

9. Remove the Reader Controller PCB [1].
• 1 Screw [2]
• 4 Screws [3]
NOTE:
Caution when installing the Reader Controller PCB [1]
• When installing the Reader Controller PCB [1], tighten the screw [2] first.
CAUTION:
• The Reader Controller PCB in factory default setting is different by the host machine type.
Host Machine Type
Reversal ADF model
Single pass ADF model
ADF selectable model
*Connector configuration is different by the host machine type.
• The Reader Controller PCB for service part is 1 type described below.
PCB Configuration
Single pass / Reversal ADF model *
*Connector configuration is different by the host machine type.
• When the Reader Controller PCB for service part is installed on the Single Pass ADF, a message prompting the user
to upgrading the firmware immediately after turning ON the host machine. When executing the upgrade following the
message, the firmware for the single pass ADF is installed. However, the firmware is not upgraded when the Reader
Controller PCB for service part is installed on the reversal ADF model or platen cover model.
• If upgrading the firmware is skipped, the ADF enters the limited functions mode. a "The feeder needs to be checked."
message is displayed in the status line and a "Ready to copy. (Functions Limited) Cannot use Feeder" message is
displayed on the copy screen. a message prompting the user to upgrading the firmware each time of turning ON or
OFF the host machine. In order to maintain consistency in versions for options, upgrade or downgrade the firmware
regardless of the setting in service mode > OPTION > FNC-SW > VER-CHNG.
10. <When the ADF driver PCB and the reader controller PCB is replaced>
Actions after Replacement:
5x
[3]
[1]
Reader Controller PCB in factory default setting
PCB Configuration
Reversal ADF *
Single pass ADF model *
Single pass / Reversal ADF model *
Reader Controller PCB for service part
"Actions after Parts Replacement" on page 329
[3]
[3]
Reversal ADF model
Single pass ADF model
Reversal ADF model
Reversal ADF model
191
4. Disassembly/Assembly
[2]
Firmware
Firmware