Konica Minolta BIZHUB 25E Field Engineering Manual page 247

No. Symptom
9 Paper skew.
10 When using the
auto feeder, the
reception image
expanded.
11 When using the
auto feeder, the
reception image
compressed.
12 The printouts are
too light.
13 Clock malfunction
What to confirm
1. If you re-load the document and
make more than 10 copies, paper
skew still occurs.
2. Has the paper cassette been
installed properly?
3. Does the cassette have any
malfunctions?
1. If you print "Checkered Pattern", the
image will expands more vertically
than horizontally.
Note: The following causes are
also possible. The sender
sent the document data using
unsuitable documents like
excessively thick paper, no
carbon paper, rear carbon
paper, and so on.
2. If you replace the main control
board, the symptom will be fixed.
1. If you print "Checkered Pattern", the
image is more compressed vertically
than horizontally.
2. If you pull out a paper from resist
roller and the fuser, the friction is
normal.
3. The electromagnetic clutch is
normal.
4. If you replace the main control
board, the symptom will be fixed.
1. Are copied and test print images too
light, or uneven density?
Note: The following causes
are also possible.
contrast setting might be
not appropriate. Contrast
irregularities are likely on
printouts of documents
containing thin lines or small
blue lettering.
2. If you replace the toner or the drum
cartridge, the symptom will be fixed.
1. Are there any errors in the clock
setting process?
2. If you replace the main control
board, the symptom will be fixed.
Countermeasure
Yes Check No. 2.
No Solved.
Yes Check No. 3.
No Re-install it properly.
Yes Replace the cassette.
No Replace the machine.
Yes Check No. 2.
No The sender's problem.
(It might be caused by using
unsuitable documents, or sender
transmission problems.)
Yes Replace the main control board.
No Replace the machine.
Yes Check No. 2.
No The sender's problem.
(It might be caused by sender
transmission problems.)
Yes Check No. 3.
No Clean resist roller. Replace resist
roller or the fuser.
Yes Check No. 4.
No Replace the electromagnetic clutch.
Yes Replace the main control board.
No Replace the machine.
Yes Check No. 2.
No The sender's problem.
(Possible causes are inappropriate
The contrast setting, using colored
documents, poor line connection,
using unsuitable documents, or sender
transmission problems.)
Yes Replace the toner or the drum
cartridge.
No Refer to the "Image Quality Problems".
Yes Follow the instruction manual.
No Check No. 2.
Yes Replace the main control board.
No Replace the machine.
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