Canon iR7086, Service Manual

Page: 626 / 735

Chapter 17
17-38
<HV-PRI>
Primary Charging Assembly Output Adjustment
T-17-24
<HV-TR>
Transfer Charging Assembly / Pre-Transfer Charging Assembly Output Adjustment
OHP-OFST Input Developing Bias Offset Value for OHP/Tracing Paper/Postcard
1
range: -50 to 50 (V) [Default: 0V]
Usage:
By setting the value larger, the degree of foggy increases. By setting the value smaller, the degree of foggy decreases.
-Input the value written in the service label when replacing the DC Controller PCB or clearing RAM.
- Use the item only when performing the foregoing operation. Do not use with the normal service.
- Select COPIER > OPTION > BODY > ACFRQ-R/ACFRQ-T to adjust the degree of foggy. Execution of adjustment with this
item involves the change in density; thus, do not use this item.
VD-OFS-O Input Potential Control Dark Target Potential Offset Value for OHP/Tracing Paper/Postcard
1
range: -50 to 50 (V) [Default: 0V]
Usage:
- By setting the value larger, the image density becomes dark. By setting the value smaller, it becomes light.
- When toner scattering image occurs, set a smaller value.
- Input the value written in the service label when replacing the DC Controller PCB or clearing RAM.
- Use the item only when performing the foregoing operation. Do not use with the normal service.
COPIER > ADJUST > HV-PRI
Sub item Description Level
GRID Use it to enter the adjustment value for the primary charging assembly grid voltage.
1
range: 400 to 900 (V)
Do not use with the normal service.
MEMO:
The item is enabled only when PO-CNT is '0' (COPIER > OPTION > BODY > PO-CNT).
COPIER > ADJUST > V-CONT
Sub item Description Level
- Enter the value indicated on the service label if you have replaced the DC controller PCB, initialized the RAM, or replaced the potential sensor
(EPOTOFST only).
- After changing the setting, opening/closing the front cover or turning the power OFF/ON in order to activate the potential control.