Canon BJ-W3000 Service Manual page 177

CHAPTER 5. TROUBLESHOOTING
3.3 Replacing the engine controller
Before replacing the engine controller, the data such as the waste ink amount, carriage
driving time, and paper feed accuracy compensation value stored in the EEPROM of the
engine controller must be copied into the EEPROM of the image controller, and then be
automatically updated through internal communication.
The procedure is as follows.
1) Access the service mode, and select "INITIALIZE".
2) Display "E/C EEPROM" in the message display.
3) While holding the Down arrow key, press the ENTER key. The engine controller
EEPROM data is copied into the EEPROM of the image controller.
While the data is being transferred, a "*" mark is displayed to the right of the "E/C
EEPROM" display.
4) After the "*" mark has disappeared, turn off the power, and unplug the power cord.
5) Replace the engine controller.
At this time, be sure to check SW201 (model switch) on the new engine controller.
<Switching of the model>
On the engine controller, the model selection is determined by the jumper (SW201).
* A0 model: No jumper
* A1 model: Jumper installed
6) Run the "Auto Adjust" and "Auto Band Adj." of the "Adjustment" menu within the Main
menu, and check whether the printing is correct.
CAUTION
If the precision of the printing becomes worse after replacing the engine controller, the
replacement procedure may not have been followed correctly, or the EEPROM data may not
have been successfully updated.
In this case, be sure to check that the paper feed accuracy compensation value ("X-SCALE"
of the "ADJUST" menu within the service mode) matches the H/W X value written on the
label attached to the left frame (remove the left cover to see the label).
If they don't match, set the printer to the value written on the label.
If they do match, perform the procedure described in
of "V. Corrective Procedures for Image Defects". (See P. 5-51.)
5–12
(See P. 3-33.)
"10. Dimensional accuracy problems"