Canon iR C2880 Series Service Manual page 576

Chapter 17
6. BLANK
Adjustment for the leading edge of image/margin of the rear end
Sub item
BLANK-T Used to enter adjusted value of image blank width (leading edge).
Adjustment method
- If you have cleared the main controller PCB's RAM or replaced the SRAM PCB, enter the value on the service label.
Adjustment range 0 to 1000 [Factory default/After RAM clear: +59]
BLANK-L Used to enter adjusted value of image blank width (left edge).
Adjustment method
- If you have cleared the main controller PCB's RAM or replaced the SRAM PCB, enter the value on the service label.
Adjustment range 0 to 1000 [Factory default/After RAM clear: +47]
BLANK-R Used to enter adjusted value of image blank width (right edge).
Adjustment method
- If you have cleared the main controller PCB's RAM or replaced the SRAM PCB, enter the value on the service label.
Adjustment range 0 to 1000 [Factory default/After RAM clear: +47]
BLANK-B Used to enter adjusted value of image blank width (trailing edge).
Adjustment method
- If you have cleared the main controller PCB's RAM or replaced the SRAM PCB, enter the value on the service label.
Adjustment range 0 to 1000 [Factory default/After RAM clear: +59]
7. V-CONT
Potential Control System Adjustment
Sub item
VCONT-Y/K Adjust the image contract electric potential.
Use this item for low/high density. Since the same high pressure is used for Y, M, and C, adjusting VCONT-Y will also
adjust M and C.
Adjustment range: -5 to 5 (Unit: 10V)
[Factory setting value/Value after RAM clear: 0]
Attention:
Setting a larger value increases density. Note that the adjustment is made to all Y, M, and C.
Be sure not to use this item in normal operation.
VBACK-Y/K Adjust the image contract electric potential.
Use this item for low/high density. Since the same high pressure is used for Y, M, and C, adjusting VCONT-Y will also
adjust M and C.
Adjustment range: -5 to 5 (Unit: 10V)
[Factory setting value/Value after RAM clear: 0]
Attention:
Setting a larger value increases density. Note that the adjustment is made to all Y, M, and C.
Be sure not to use this item in normal operation.
8. PASCAL
Adjustment for auto gradation correction control
Sub item
OFST-P-Y/M/C/K Use it to apply offset adjustment on the test print reading signal (Y) for PASCAL control at time of auto gradation
correction (full).
Method of Adjustment
- a higher setting will make the image darker after auto gradation correction (full).
Range of Adjustment: -128 to +128 [Factory default/After RAM clear: 0]
9. COLOR
Adjustment for color balance
17-40
T-17-30
COPIER>ADJUST>BLANK
Description
T-17-31
COPIER>ADJUST>V-CONT
Description
T-17-32
COPIER>ADJUST>PASCAL
Description
level.
1
1
1
1
Level.
2
2
level.
1