Konica Minolta bizhub 420 User Manual

Troubleshooting12
bizhub 500/420/360 (Phase 3) 12-13
Is a double-sided doc-
ument being copied?If a thin double-sided document 
is being copied, the information 
on the back side may be repro-
duced in the copy. Touch [Light-
er] on the Background Removal 
Screen to select a lighter back-
ground density. (page 4-16)
The image is not 
aligned properly on the 
paper.Is the document incor-
rectly positioned?Correctly position the document 
against the measuring guide. 
(page 4-11)
Load the document into the...

12Troubleshooting
12-14 bizhub 500/420/360 (Phase 3)If any message other than those listed above is displayed, perform the 
operation described in the message. If the problem is not corrected after the 
described operation is performed, contact your service representative.
Even though the paper 
misfeed was cleared, 
copies cannot be pro-
duced.Are there paper mis-
feeds at other loca-
tions?Check the touch panel for JAM 
location display and then re-
move any misfeed paper at all 
other locations. (page...

Troubleshooting12
bizhub 500/420/360 (Phase 3) 12-15
12.5 Main Messages and Their Remedies
MessageCauseRemedy
Original left on glass. The document was left on the 
original glass.Remove the document from 
the original glass.
Matching paper size is not 
available.
Select paper size.Paper of a suitable size is not 
loaded in a paper tray. Either select paper of a differ-
ent size or load paper of a 
suitable size.
Original size cannot be de-
tected.
Select paper size.The document is not posi-
tioned...

12Troubleshooting
12-16 bizhub 500/420/360 (Phase 3)If any message other than those listed above is displayed, perform the 
operation described in the message. If the problem is not corrected after the 
described operation is performed, contact your service representative.
Misfeed detected. Since a paper misfeed oc-
curred, the machine is unable 
to make copies.Clear the paper misfeed.
Malfunction detected.
Please call your Service Rep-
resentative.The machine malfunctioned 
and is unable to make...

13Machine Maintenance
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Machine Maintenance13
bizhub 500/420/360 (Phase 3) 13-3
13 Machine Maintenance
13.1 Cleaning
This section describes the procedures for cleaning each part.
Cleaning the left partition glass
Keep the glass clean; otherwise soil marks 
may be copied, resulting in dark lines on 
the copies.
%Raise the ADF, and clean the left 
partition glass by wiping it with a 
soft, dry cloth.
2
Reminder 
Never use solvents, such as benzene or thinner, to clean the left partition 
glass.
Cleaning the original glass
Keep...

13Machine Maintenance
13-4 bizhub 500/420/360 (Phase 3)Cleaning the document pad
Keep the pad clean; otherwise spots may 
be copied
%Raise the ADF, and clean the 
document pad by wiping it with a 
soft, dry cloth.
2
Reminder 
Never use solvents, such as benzene or thinner, to clean the document 
pad.
Cleaning the paper take-up roller
Keep the roller clean; otherwise soil marks 
may be copied, resulting in dark lines on 
the copies.
%Clean the paper take-up rollers by 
wiping them with a soft, dry cloth....

Machine Maintenance13
bizhub 500/420/360 (Phase 3) 13-5Cleaning the writing unit glass and the electrode wires
Keep the writing unit glass and the electrode wires clean; otherwise soil 
marks may be copied, resulting in dark lines on the copies.
1Open the main front door, then 
withdraw and push in the writing unit 
glass cleaning knob and the corona 
wire cleaning knob, several times.
2Firmly push in these knobs, then 
close the machine front door.
Cleaning the main unit
%Clean the surface of the main...

13Machine Maintenance
13-6 bizhub 500/420/360 (Phase 3)Cleaning the control panel
%Clean the control panel by wiping it 
with a soft, dry cloth.
2
Reminder 
Pressing too hard on the control panel or the touch panel may damage 
them. Never use a mild household detergent, glass cleaner, benzin or 
thinner to clean the control panel or touch panel.
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