Canon imagePRESS 1135 Series Service Manual page 1406

Title Paper displacement
Explaination [Detailed explanation]
Image displacement occurred in the main scanning direction upon feeding preprinted
media.
[Cause]
CIS could not detect the paper edge because the rear edge of the preprinted media
was filled with dark color.
[Field Remedy]
1 Set Service Mode (Level2)> COPIER> Option> FEED-SW> CIS-SW to "1". This
allows the CIS detection mode to be switched to CIS threshold fixed mode.
2 Feed 10 sheets of preprinted media. If the symptom improves, then the work is
completed. If not, go to Step 3).
3 Feed preprinted media and plain paper, and adjust to the setting value which does
not cause the paper displacement in the main scanning direction while gradually
lowering the value of Service Mode (Level2)> COPIER> Option> FEED-SW> CIS-
TH. Default is set to "26" as a result of CIS-SW set to "1" in Step 1).
[Caution]
• Adjustment may not improve the symptom in the case of black preprinted media.
• Horizontal mis-registration may occur on white paper after changing "CIS-TH."
• CIS life becomes approximately 1/3 by fixing to CIS threshold fixed mode in CIS
detection mode.
• Make a readjustment in "CIS-TH" when CIS or the Registration Unit was replaced.
Title Prevention of side registration displacement
Explaination Refer to FAQ information
8
Service Mode > Situation Mode > Troubleshooting
8 Service Mode > Situation Mode > Troubleshooting
Title Image density loss
Explaination [Detailed explanation]
In the low humidity environment, image density loss due to excessive transfer might
occur in the second page of the duplex printing when solid black and half tone duplex
printing is performed. If the similar symptom occurs, follow the steps below.
[Cause]
Assumed cause is excessive transfer current.
[Field Remedy]
1. Service Mode> COPIER> Display> ANALOG> ABS-HUM2, check the inside
moisture content.
2. Service Mode> COPIER> Adjust> HV-TR> 2TR-TGT1 to 8, corresponding to the
inside moisture content checked on the step 1, reduce the value one step each
while checking the symptom improvement at each step. As the value is changed
by 1, current is increased/decreased by 5uA.
0.63g/m3 or below : TR-TGT1
0.64 to 1.72g/m3 : 2TR-TGT2
1.73 to 5.79g/m3 : 2TR-TGT3
5.8 to 8.89g/m3 : 2TR-TGT4
8.9 to 14.9g/m3 : 2TR-TGT5
15 to 17.9g/m3 : 2TR-TGT6
18 to 21.5g/m3 : 2TR-TGT7
21.6g/m3 or above : 2TR-TGT8
[Reference]
If the transfer current is excessively decreased, mottled image might occur.
8-463
8-463