Adjust; Adj-Xy; Ccd - Canon imageCLASS MF4890dw Service Manual

ADJUST

■ ADJ-XY

COPIER>ADJUST>ADJ-XY
Sub item Description
ADJ-X Adjustment value of image reading start position (Horizontal
scanning direction) (X direction)
[Applicable case]
When the reading position of vertical scanning direction in fixed
reading is incorrect
[Adjustment]
• Reduce the setting value when non-image width is larger than
criteria.
• Increase the setting value when the area out of original area is
copied.
• When increment the setting value by 1, the image reading start
position is moved toward trailing edge by 0.1mm.
Setting range: - 30 ~ 30
[Value after RAM clear: 0]
STRD-POS Adjusting reading position in DF stream reading
[Applicable case]
When the reading position of vertical scanning direction in DF
stream reading is incorrect
[Adjustment]
• When increment the setting value by 1, image reading start
position is moved toward leading edge by 0.1mm.
Setting range: - 30 ~ 30
[Value after RAM clear: 0]
ADJ-X-MG Fine adjustment (0.1% precision) of magnification ratio in
Horizontal scanning direction in copyboard reading
±3%
[Applicable case]
When copy output image is larger or smaller than original image
[Adjustment]
Adjust by comparing the copy output and original.
Increase the value when output image is smaller.
Decrease the value when output image is larger.
Setting range: - 30 ~ 30
[Factory default settings/ Value after RAM clear] 0
[Caution] This adjustment is targeted to adjust the image position
on copy output.
This may affect to the image of SCAN.
8
Service Mode > COPIER > ADJUST > CCD
Common ADF
to all model
models only
Yes
Yes
Yes
T-8-4
8 Service Mode > COPIER > ADJUST > CCD

■ CCD

COPIER>ADJUST>CCD
Sub item Description
FBTAR-R Shading target value for RED in copyboard reading
Setting range: 128 ~ 384
[Value after RAM clear: 290]
FBTAR-G Shading target value for GREEN in copyboard reading
Setting range: 128 ~ 384
[Value after RAM clear: 284]
FBTAR-B Shading target value for BLUE in copyboard reading
Setting range: 128 ~ 384
[Value after RAM clear: 278]
FBTAR-BW Shading target value in copyboard black and white reading
Setting range: 128 ~ 384
[Value after RAM clear: 301]
DFTAR-R Shading target value for RED in DF reading
Setting range: 128 ~ 384
[Value after RAM clear: 334]
DFTAR-G Shading target value for GREEN in DF reading
Setting range: 128 ~ 384
[Value after RAM clear: 323]
DFTAR-B Shading target value for BLUE in DF reading
Setting range: 128 ~ 384
[Value after RAM clear: 318]
DFTAR-BW Shading target value in black and white reading
Setting range: 128 ~ 384
[Value after RAM clear: 341]
8-4
Common ADF
to all model
models only
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
T-8-5
8-4