Unfocused Image (Margin) - Canon imagePRESS 1135 Series Service Manual

Unfocused image (margin)

[Location]
Transfer
[Cause]
Lack of transfer current
[Conditions]
At the initial installation, the symptom may occur under the following conditions.
• Low temperature / low humidity environment
• When the initial resistance of secondary transfer roller is low (note that the resistance
gets higher as the extended use)
• When the toner deposit amount is high
• When the paper resistance is high
[Field measure]
Increase the secondary transfer current in service mode.
1) Check the absolute moisture ratio.
COPIER > DISPLAY > ANALOG > ABS-HUM2
2) Decrease the secondary transfer current.
According to the absolute moisture ratio checked in step 1), specify the setting value
from COPIER > ADJUST > HV-TR > 2TR-TGT 1 to 8.
Absolute moisture ratio
0.63 g/m 3 or less : 2TR-TGT1
0.64 to 1.72 g/m 3 : 2TR-TGT2
3
1.73 to 5.79 g/m : 2TR-TGT3
3
5.8 to 8.89 g/m : 2TR-TGT4
3
8.9 to 14.9 g/m : 2TR-TGT5
15 to 17.9 g/m 3 : 2TR-TGT6
18 to 21.5 g/m 3 : 2TR-TGT7
3
21.6 g/m or more : 2TR-TGT8
As the value is changed by 1, current is increased / decreased by 5μA.
+ : Increase
- : Decrease
Increase the value 1 by 1 and check the symptom each time.
[Points to note]
Density loss due to excessive transfer
6
Troubleshooting > Image Faults > Unfocused image (margin)
6 Troubleshooting > Image Faults > Unfocused image (margin)
[Sample Image]
6-12
F-6-10
6-12