Canon iR C3200 Series Service Manual page 811

Field Remedy
Set '2'to the following in service mode: COPIER>OPTION>BODY>TMC-SLCT.
16.3.2.5.6 Mottled image: when large numbers of prints are made daily and, the drum unit has been
in use for a long time
[ Inspected by Canon Inc. ]
Cause
The toner in the developing assembly is caking into lumps.
Field Remedy
Clean the inside of the machine in user mode [Adjustment/Cleaning> Cleaning inside Main Unit].
Note: It is recommended to execute the mode every 4000 prints or more, as a guide.
16.3.2.5.7 Uneven image (rough texture) in halftone images
[ Inspected by Canon Inc. ]
Cause
The level of secondary transfer current is so high that the transfer efficiency decreases because of re-transfer.
Field Remedy
1. Clean the inside of the machine in user mode [Adjustment/Cleaning> Cleaning inside Main Unit].
2. In service mode level 2 [COPIER> Adjust> HV-TR> 2TR-TGT/2TR-SHR/TR-ENV/TR-PPR/TR-CLR/TR-
DUP], change the set value with extra care.
Note: As adverse effects of changing the setting, it is possible toner scattering or spots will worsen.
16.3.2.5.8 Uneven density (rough texture) in Bk solid images: in a high humidity environment
Symptom
In a high humidity environment, uneven density occurs in Bk solid images. (rough texture)
Cause
The level of secondary transfer current is too high, thus decreasing the transfer efficiency because of re-transfer.
Field Remedy
Execute the following in user mode: adjust/clean>auto gradation correction>full correction. Or, add a cassette
heater.
16.3.2.5.9 Toner scattering around image with a high color ration in a low humidity environment
Symptom
Toner stray tends to occur around an image with a high color ratio in a low humidity environment.
Cause
The level of the secondary transfer current is too low, thus failing to transfer the toner from the ITB.
Chapter 16
0002-3400
0002-3404
0002-3408
0002-3413
16-37