Canon imageCLASS MF3111 Service Manual - page 148
Chapter 5
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Running H/F 5
5-2
5.2
Countermeasure
5.2.1
Image Faults
5.2.1.1
Partially Blank/Streaked
5.2.1.1.1
There are vertical black lines or a vertical white line in a solid black image.
0007-8083
The vertical black lines are likely to have been caused by the ribs of the heater holder. The vertical white line is likely
to have been caused by the thermal fuse (if it corresponds to the location of the fuse).
Select heavy paper mode.
5.2.2
Malfunction
5.2.2.1
Control PanelRelated
5.2.2.1.1
When manual paper size is set to envelope, the LCD in standby mode shows ENV.
regardless of envelope type.
0007-8088
The LCD in standby mode does not support envelop type indications.
Display the User data registration screen or output a User data list to check envelope type.
5.2.2.2
Malfunction/Faulty Detection
5.2.2.2.1
When paper size is set to A5, paper size error does not occur even if printing is made with
othersize paper.
0007-8091
The printer engine does not support A5 size.
Since image printed on a sheet is A5 size, paper size error does not occur.
Therefore, field remedy is not taken.