Canon imageRUNNER ADVANCE C255 Series, Service Manual, Page: 657 / 987

COPIER (Service mode for copier) > ADJUST (Adjustment mode) > COLOR
ADJ-K 1 Adjustment of color balance for Bk-color
Detail To adjust the default value of the color balance for Bk-color when the density of Bk-color varies
between devices.
As the value is larger, the image gets darker. If the value is too large, a transfer failure and/or a
fixing failure occurs.
Use Case Upon user's request (to reduce density difference between devices)
Adj/Set/Operate Method 1) Enter the setting value (switch negative/positive by -/+ key) and press OK key.
2) Turn OFF/ON the main power switch.
Display/Adj/Set Range -8 to 8
Default Value 0
OFST-Y 1 Adj Y-clr brit area dens&color balance
Detail To adjust the bright area density and color balance of Y-color.
As the value is larger, the image gets darker.
Decrease the value when the background cannot be read correctly because the density of a
document is dark and increase the value when the density of a document is light.
Decrease the value when removal of the background is not performed correctly and a fogging-like
image appears.
This setting is linked with [Correct Density], [Correct Shading] and [Auto Correct Color Mismatch]
in [Settings/Registration].
Use Case
- When the background of a document cannot be read correctly
- When removal of the background cannot be performed correctly and a fogging-like image appears
Adj/Set/Operate Method
1) Enter the setting value (switch negative/positive by -/+ key) and press OK key.
2) Turn OFF/ON the main power switch.
Display/Adj/Set Range
-32 to 32
Default Value
0
OFST-M 1 Adj M-clr brit area dens&color balance
Detail To adjust the bright area density and color balance of M-color.
As the value is larger, the image gets darker.
Decrease the value when the background cannot be read correctly because the density of a
document is dark and increase the value when the density of a document is light.
Decrease the value when removal of the background is not performed correctly and a fogging-like
image appears.
This setting is linked with [Correct Density], [Correct Shading] and [Auto Correct Color Mismatch]
in [Settings/Registration].
Use Case - When the background of a document cannot be read correctly
- When removal of the background cannot be performed correctly and a fogging-like image appears
Adj/Set/Operate Method 1) Enter the setting value (switch negative/positive by -/+ key) and press OK key.
2) Turn OFF/ON the main power switch.
Display/Adj/Set Range -32 to 32
Default Value 0
8. Service Mode
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