Canon iR C3380 series, Service Manual

Page: 514 / 610

Chapter 17
17-30
6. BLANK
Adjustment for the leading edge of image/margin of the rear end
T-17-30
7. V-CONT
Potential Control System Adjustment
T-17-31
8. PASCAL
Adjustment for auto gradation correction control
T-17-32
9. COLOR
Adjustment for color balance
T-17-33
COPIER>ADJUST>BLANK
Sub item Description level.
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]
1
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]
1
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]
1
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]
1
COPIER>ADJUST>V-CONT
Sub item Description Level.
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.
2
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.
2
COPIER>ADJUST>PASCAL
Sub item Description level.
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]
1
COPIER>ADJUST>COLOR
Sub item Description Level.
ADJ-Y/M/C/K Adjust the color balance of Y/M/C/K colors for users.
Change the default value of the color balance when the output density varies by machine. Setting a larger value increases
density. Setting a smaller value decreases density.
Setting range: -8 to 8
[Factory setting value/Value after RAM clear: 0]
1
OFST-Y/M/C/K Adjust the density and color balance of the bright part of Y/M/C/K colors.
Offset the color balance of the bright part when the document base is not normally read. Setting a larger value increases
the color balance. Setting a smaller value decreases the color balance.
When the base is not normally eliminated and it looks like a fogging image, decrease the value until the fogging becomes
invisible.
Setting range: -32 to 32
[Factory setting value/Value after RAM clear: 0]
1
LD-OFS-Y/M/C/K Adjust the color balance of low density area.
Be sure not to use this item in normal operation.
Setting range: -8 to 8
[Factory setting value/Value after RAM clear: 0]
2