Canon W8400 Series, Service Manual, Page: 127 / 224

Chapter 4
4-27
4.3.12 PCBs
0009-4809
Clicking the figure number under the video mark allows you to view the movie showing the procedure.
F-4-60
Do not replace the system controller and engine controller at the same time.
Each controller has important stored information such as the setting values and carriage driving time. To retain this information, the information in the
controller is temporarily stored in the other controller using internal communication before a controller is replaced. After the replacement, the information
is automatically written into the new controller. Therefore, the two controllers cannot be replaced at the same time.
Also, when you have replaced the system controller and engine controller as service parts, check that the firmware version is the latest available. If it is
not, update the firmware to the latest version.
a) Replacing the system controller
When replacing the system controller original information of the following items in the MAIN MENU are not backed up and not restored in the new system
controller.
Save the original information accordingly, prior to the replacement of the system controller in case of need.
- MAIN MENU> Interface Setup > TCP/IP > IP Setting
1) Turn off the power and disconnect the power plug from the outlet.
2) Replace the system controller.
3) Connect the power plug to the outlet and turn the printer on while pressing the [Paper Selection] button, [V] button, and [Stop] button. (The printer
starts in the Board Replace mode.)
4) Make sure that "Initializing" appears on the display, and then release the buttons. (The message lamp goes on when the printer enters the Board Replace
mode.)
5) Wait until "REPLACE MODE" appears on the display.
6) Select "S/C REPLACE" and press the [OK] button.
7) Make sure that "TURN OFF THE POWER" appears on the display, and then turn off the printer.
8) Turn on the printer.
9) Check the firmware version. If the firmware version is not the latest, update the firmware to the latest version.
10) In the Main menu, select Interface Setup --> IP Setting, and then make the settings again.
b) Replacing the engine controller
1) Turn off the power and disconnect the power plug from the outlet.
2) Replace the engine controller.
3) Connect the power plug to the outlet and turn the printer on while pressing the [Paper Selection] button, [V] button, and [Stop] button. (The printer
starts in the Board Replace mode.)
4) Make sure that "Initializing" appears on the display, and then release the buttons. (The message lamp goes on when the printer enters the Board Replace
mode.)
5) Wait until "REPLACE MODE" appears on the display.
6) Select "E/C REPLACE" and press the [OK] button.
7) Make sure that "TURN OFF THE POWER" appears on the display, and then turn off the printer.
8) Turn on the printer.
9) Check the firmware version. If the firmware version is not the latest, update the firmware to the latest version.
4.3.13 Opening the caps and moving the wiper unit
0009-4810
The procedures for manually opening the caps and ink supply valves are presented below.
The carriage lock pin and caps need to be released manually when moving the carriage with the power off. For details on the sensors and flags, refer to
TECHNICAL REFERENCE > Detection Functions Based on Sensors.
1. Opening the caps and releasing the carriage lock pins
Clicking the figure number under the video mark allows you to view the movie showing the procedure.
F-4-61
1) Remove the right circle cover (L), right circle cover (S), right side cover, and upper right cover.
2) Insert the flathead screwdriver in the slot [1] in the purge unit's elevation unit from the right and turn the screwdriver clockwise. The cap [2] and lock
pin [3] lower, allowing you to move the carriage.