Canon MF720 Series Service Manual page 235

■ After Replacing the Reader Unit
1. Release the 2 claws [1], remove the Scoop-up Sheet Holder [2], and check the setting values of the Standard White
Plate indicated under the barcode that was hidden beneath the Scoop-up Sheet Holder.
2. Enter the X, Y, and Z values indicated under the barcode on the Copyboard Glass in
• COPIER > ADJUST > CCD > W-PLT-X (White level data (X) entry of white plate) ,
• COPIER > ADJUST > CCD > W-PLT-Y (White level data (Y) entry of white plate) , and
• COPIER > ADJUST > CCD > W-PLT-Z (White level data (Z) entry of white plate) ,
and then write the entered values (the the X, Y, and Z values shown under the barcode on the Copyboard Glass) on the
service label.
NOTE:
The value of W-PLT-X: The first four digits of the value on the label
The value of W-PLT-Y: The four digits in the middle of the value on the label
The value of W-PLT-Z: The last four digits of the value on the label
3. Return the Scoop-up Sheet to its original position.
4. AGC adjustment
1. Entering a provisional value
Change the foregoing values to "1,000".
• COPIER > ADJUST > CCD > LED-BW-R (Adjustment of LED light-up time (R) at B&W reading)
• COPIER > ADJUST > CCD > LED-BW-G (Adjustment of LED light-up time (G) at B&W reading)
• COPIER > ADJUST > CCD > LED-BW-B (Adjustment of LED light-up time (B) at B&W reading)
Change the foregoing values to "1,200"
• COPIER > ADJUST > CCD > LED-CL-R (Adjustment of LED light-up time (R) at color reading)
• COPIER > ADJUST > CCD > LED-CL-G (Adjustment of LED light-up time (G) at color reading)
• COPIER > ADJUST > CCD > LED-CL-B (Adjustment of LED light-up time (B) at color reading)
2. Adjust the white level in the following service mode.
• COPIER > FUNCTION > CCD > BW-AGC (CIS intensity adjustment in ADF (B&W))
• COPIER > FUNCTION > CCD > CL-AGC (CIS intensity adjustment in ADF (color))
3. If the operation was "successful", this procedure is completed. (There is no need to write the value on the service label.)
2x
[2]
[1]
[1]
227
5. Adjustment