Canon iR C3380 series, Service Manual

Page: 519 / 610

Chapter 17
17-35
12. FEED-ADJ
T-17-36
Use this item when the following faulty images occur.
- A patchy trace / A trace of the auxiliary brush caused by transfer remaining toner (When the color in the brush trace
has high density) / A transfer ghost: The primary transfer current is low. --> Change the setting value to in the plus
direction.
- A trace of the auxiliary brush caused by double transfer fogging / double transfer remaining toner (When the color in
the brush trace has higher density than the one in the prior station): The primary transfer current is high. --> Change the
setting value to the minus direction.
2
1TR-TGM Adjust the offset for the primary transfer ATVC target current (M)
Adjustment range: -10 to 10 (Unit: 1muA)
[Factory setting value/Value after RAM clear: 0]
This is valid when COPIER>OPTION>BODY>PTATVCSW=1 is set (the primary transfer ATVC control is valid).
2
Use this item when the following faulty images occur.
- A patchy trace / A trace of the auxiliary brush caused by transfer remaining toner (When the color in the brush trace
has high density) / A transfer ghost: The primary transfer current is low. --> Change the setting value to in the plus
direction.
- A trace of the auxiliary brush caused by double transfer fogging / double transfer remaining toner (When the color in
the brush trace has higher density than the one in the prior station): The primary transfer current is high. --> Change the
setting value to the minus direction.
2
1TR-TGK1 Adjust the offset for the primary transfer ATVC target current (Bk: Black single mode)
Adjustment range: -10 to 10 (Unit: 1muA)
[Factory setting value/Value after RAM clear: 0]
This is valid when COPIER>OPTION>BODY>PTATVCSW=1 is set (the primary transfer ATVC control is valid).
2
Use this item when the following faulty images occur.
- A patchy trace / A trace of the auxiliary brush caused by transfer remaining toner (When the color in the brush trace
has high density) / A transfer ghost: The primary transfer current is low. --> Change the setting value to in the plus
direction.
- A trace of the auxiliary brush caused by double transfer fogging / double transfer remaining toner (When the color in
the brush trace has higher density than the one in the prior station): The primary transfer current is high. --> Change the
setting value to the minus direction.
2
COPIER>ADJUST>FEED-ADJ
Sub item Description level.
REGIST Used to adjust the registration roller clutch ON timing.
Adjustment method
- Increasing the value by 1 moves the image by 0.1 mm in the direction of the leading edge of the paper.
- If you have cleared the DC controller PCB's RAM or replaced the DC controller PCB, enter the value on the service
label.
Adjustment range - 50 to 50 (0.1 mm units)
[Factory default/After RAM clear: -20]
1
REG-THCK Registration clutch ON timing (thick paper)
Adjusts the margin on the leading edge (0.1mm scale) by adjusting the timing to turn ON the registration clutch for thick
paper.
Setting Range: 50 ~ -50
[Factory default value / post-RAM clear value: 0]
1
REG-OHT Registration clutch ON timing (OHT)
Adjustment of the OHT registration clutch ON timing allows adjustment of the leading edge margin (unit: 0.1mm).
Setting range: -50 to 50
[Factory settings and after RAM clear: 0]
1
REG-DUP1 Second page registration clutch ON timing (plain paper)
Adjustment of the plain paper second page registration clutch ON timing allows adjustment of the second page leading
edge margin (unit: 0.1mm).
Setting range: -50 to 50
[Factory settings and after RAM clear: 0]
1
REG-DUP2 Second page registration clutch ON timing (thick paper)
Adjustment of the thick paper second page registration clutch ON timing allows adjustment of the second page leading
edge margin (unit: 0.1mm).
Setting range: -50 to 50
[Factory settings and after RAM clear: 0]
1
ADJ-C1 Image write position adjustment in main scanning direction when sheets are fed from cassette 1
Adjustment method
- When the value is incremented by 1, the image moves by 0.1 mm to the right.
- Input the value given on the service label when the RAM on the DC controller circuit board has been cleared or when
the DC controller circuit board has been replaced.
Adjustment range: -100 to 100 (in 0.1 mm increments)
[Factory setting/value after clearing RAM: 0]
1
ADJ-C2 Image write position adjustment in main scanning direction when sheets are fed from cassette 2
Adjustment method
- When the value is incremented by 1, the image moves by 0.1 mm to the right.
- Input the value given on the service label when the RAM on the DC controller circuit board has been cleared or when
the DC controller circuit board has been replaced.
Adjustment range: -100 to 100 (in 0.1 mm increments)
[Factory setting/value after clearing RAM: 0]
1
ADJ-C3 Image write position adjustment in main scanning direction when sheets are fed from cassette 3
Adjustment method
- When the value is incremented by 1, the image moves by 0.1 mm to the right.
- Input the value given on the service label when the RAM on the DC controller circuit board has been cleared or when
the DC controller circuit board has been replaced.
Adjustment range: -100 to 100 (in 0.1 mm increments)
[Factory setting/value after clearing RAM: 0]
1
COPIER>ADJUST>HV-TR
Sub item Description Level.