Canon imageRUNNER ADVANCE C255 Series, Service Manual, Page: 643 / 987

COPIER (Service mode for copier) > ADJUST (Adjustment mode) > DENS
DMAX-Y 2 Adj D-max ctrl Y-color dens target VL
Detail An image failure might occur because the density target value of the D-max control becomes out
of the setting table due to environment change.
Adjust the offset of the yellow density target value of D-max control.
Use Case When any image failure occurs due to environment change
Adj/Set/Operate Method Enter the setting value (switch negative/positive by -/+ key) and press OK key.
Caution Do not use this at the normal service.
Display/Adj/Set Range -8 to 8
Default Value 0
Additional Functions
Mode
Adjustment/Maintenance> Adjust Image Quality> Auto Adjust Gradation> Full Adjust, Quick Adjust
DMAX-M 2 Adj D-max ctrl M-color dens target VL
Detail An image failure might occur because the density target value of the D-max control becomes out
of the setting table due to environment change.
Adjust the offset of the magenta density target value of D-max control.
Use Case When any image failure occurs due to environment change
Adj/Set/Operate Method Enter the setting value (switch negative/positive by -/+ key) and press OK key.
Caution Do not use this at the normal service.
Display/Adj/Set Range -8 to 8
Default Value 0
Additional Functions
Mode
Adjustment/Maintenance> Adjust Image Quality> Auto Adjust Gradation> Full Adjust, Quick Adjust
DMAX-C 2 Adj D-max ctrl C-color dens target VL
Detail An image failure might occur because the density target value of the D-max control becomes out
of the setting table due to environment change.
Adjust the offset of the cyan density target value of D-max control.
Use Case
When any image failure occurs due to environment change
Adj/Set/Operate Method
Enter the setting value (switch negative/positive by -/+ key) and press OK key.
Caution
Do not use this at the normal service.
Display/Adj/Set Range -8 to 8
Default Value 0
Additional Functions
Mode
Adjustment/Maintenance> Adjust Image Quality> Auto Adjust Gradation> Full Adjust, Quick Adjust
P-TG-Y 2 Adj of ATR control Y-color target value
Detail To adjust the offset of the ATR patch target value for Y.
When the target value determined upon initialization is changed, density and the TD ratio are also
changed.
Density is increased when the value is increased, and fogging/scattering is alleviated when the
value is decreased.
Use Case When density failures, fogging, etc. occur
Adj/Set/Operate Method 1) Enter the setting value (switch negative/positive by -/+ key) and press OK key.
2) Make 10 prints of approx. 10% image ratio (ex. COPIER> TEST> PG> TYPE: 16) 20 times.
3) Execute Auto Adjust Gradation> Full Adjust.
Caution Execute the Auto Adjust Gradation first to increase the density. If you adjust the offset of the target
value, fogging might get worse.
Display/Adj/Set Range
-4 to 4
Default Value
0
Additional Functions
Mode
Adjustment/Maintenance> Adjust Image Quality> Auto Adjust Gradation> Full Adjust
8. Service Mode
632