Canon imageRUNNER C1325 Series, Service Manual

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Troubleshooting > Troubleshooting Items > Image Failure > Fogging surrounding high density images in low humidity environment
Troubleshooting > Troubleshooting Items > Image Failure > Fogging surrounding high density images in low humidity environment
[Condition]
Leaving in a low humidity environment increases the surface resistance of paper and so it
becomes more likely to generate the symptom.
[Field Remedy]
1) Find the corresponding parameter by checking the paper type, the 1st side and the 2nd
side of the paper that is generating the issue with the correspondence table and change
the set value to “10” from Service mode > Mode List > COPIER > Adjust > HV-TR.
Paper type Front side (the 1st side) Back side (the 2nd side)
Thin paper 2TR-TH-1 2TR-TH-2
Plain paper 1 2TR-N1-1 2TR-N1-2
Plain paper 2 2TR-N2-1 2TR-N2-2
Plain paper 3 2TR-N3-1 2TR-N3-2
Recycled paper 1 2TR-R1-1 2TR-R1-2
Recycled paper 2 2TR-R2-1 2TR-R2-2
Recycled paper 3 2TR-R3-1 2TR-R3-2
Heavy paper 1 2TR-H1-1 2TR-H1-2
Heavy paper 2 2TR-H2-1 2TR-H2-2
Heavy paper 3 2TR-H3-1 2TR-H3-2
Color paper 2TR-CP-1 2TR-CP-2
OHP 2TR-O-1 -
Labels 2TR-LA-1 -
Bond paper 2TR-B-1 2TR-B-2
Pre-punched paper 2TR-PA-1 2TR-PA-2
Envelope 2TR-EN-1 2TR-EN-2
The possible range is between “-128” and “+127” (default: “0”). A change of the set value
by “1” changes 30 V of the secondary transfer voltage.
CAUTION:
If secondary transfer voltage is too high or paper type has been changed, a faulty
image (white spots) may occur at the high density portion attributed to the too strong
secondary transfer voltage.
2) Output the image with which the symptom occurred and check to see if the same symptom
does not occur.
If the symptom does not improve, increase the set value of the step 1) by “10” at a time to
see if it works until the value reaches “30”.
T-6-5
NOTE:
Improving a state of preservation of paper may be effective in resolving a trouble in
some cases.
Explain to a customer that unused or remaining paper should be stored by being
covered with wrapping paper in a place avoiding direct sunlight.