Canon imagePRESS C1 Service Manual - page 939
Chapter 16
16-42
10.DENS
T-16-56
PVCONT-Y/M/C/K
Current value of the target patch contrast potential (Y/M/C/K color)
0 to 255V (unit: V display only)
[Checking point]
Optical value: 30 to 40
If the value is out of optical renge, replace the potential sensor and laser scanner.
2
P-LPW-Y/M/C/K
To display the laser power value of Y/M/C/K color for target patch contrast potential
00 to FF (unit: Hex display only)
[Chekcing point]
Optical value: 40 to FF
If the value is out of optical renge, replace the laser scanner and DC controller.
2
VCONT-L
Current value of the electric potential for the target contrast (L color) (Unit: V)
2
VBACK-L
Current value of the electric potential for eliminating fogging (L color) (Unit: V)
2
1TR-DC-L
Last output value of the primary transfer DC voltage (L color)
2
LPWR-L
Laser power value of L color which is a VL target electric potential (result of electric potential
control)
Display the laser power value of each color which is a VL target electric potential.
Setting range: 00 to FF (hex)
2
PVCONT-L
Current value of the target patch contrast electric potential (L color)
0 to 255V (Unit: V only)
2
P-LPW-L
Laser power value of L color which is a target patch contrast electric potential
0 to FF (Unit: hex only)
2
COPIER > DISPLAY > DENS
Subheading
Contents
Level
DENS-Y/M/C
Calculated value of developer density (Y/M/C) (% to represent the difference from the target
value)
Reference: value will be updated when the toner supply operation is executed after the power-ON.
Optical value: -3.0 to 4.0%
- If the value exceeds the upper limit (4.0% or more), copy 10 sheets of solid image.
- If the value exceeds the lower limit (-3.0% or less), copy 10 sheets of blank image.
1
REF-Y/M/C
Developer density standard on the developing cylinder (Y/M/C)
Reference: value will be updated when the toner supply operation is executed after the power-ON.
Optical value: 462 to 562
Replace the ATR sensor.
1
SGNL-Y/M/C
Measured value (Y/M/C) of developer density: the value will be measured per every job.
Reference: value will be updated when the toner supply operation is executed after the power-ON.
Optical value: 250 to 760
- If the value exceeds the upper limit (760 or more): copy 10 sheets of solid image.
- If the value exceeds the lower limit (250 or less): copy 10 sheets of blank image.
1
DENS-L
Calculated value of the developer density (L) (The difference to the target value is displayed in
%.)
Reference
The value is updated at the point when toner supply is performed after the main power switch was
turned on.
Correct value: -2.0 to 4.0%
1
REF-L
Standard of the developer density on the developing cylinder (L)
The value is updated at the point when toner supply is performed after the main power switch was
turned on.
Correct value: 464 to 560
1
SGNL-L
Measurement value of the developer density (L)
Measurement is performed every time when a job is entered.
Reference
The value is updated at the point when toner supply is performed after the main power switch was
turned on.
Correct value: 250 to 760
1
DENS-S-Y/M/C/K
Detected density value of sample image that is created at ATR control (Y/M/C/Bk)
Optical value: 250 to 450
- If the value exceeds the upper limit (450 or more), copy 10 sheets of solid image.
- If the value exceeds the lower limit (250 or less), copy 10 sheets of blank image.
2
D-Y/M/C-TRGT
Target value of developer density (Y/M/C)
[Checking point]
Optical value: 250 to 760
Input the value described on the service label on the back of host machine front cover.
COPIER >ADJUST > DENS > SGNL-Y/M/C
2
P-SENS-P
Detected light intensity for basis value (drum) at patch detection ATR control
[Checking point]
Optical value: 250 to 700
- If the value exceeds the upper limit (700 or more), this means the patch sensor breakdown and
it needs to be replaced.
- If the value exceeds the lower limit (250 or less), this means the patch detection sensor window
has dirt and it needs cleaning.
2
COPIER > DISPLAY > DPOT
Subheading
Contents
Level