Olivetti d-Color MF201 Service Manual

19. Image quality problem Field Service Ver. 1.0 Jun. 2008
340
Troubleshooting
19.3.19 Printer monocolor: low image density
A. Typical faulty images
B. Troubleshooting procedure
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ABCDE
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Step Section Check item Result Action
1
Warning display The maintenance call mark is
displayed on the panel.
YES Take action according to the
warning code shown on the
state confirm screen.
2
State Confirma-
tion o Tabl e N u m -
ber
(Service Mode)
Check data for Vg and Vdc.
Color Vdc: around 400 V
Vg : around 500 V
Black Vdc: around 400 V
Vg : around 500 V
 Go to next step.
3
State Confirma-
tion o Level His-
tory 1
(Service Mode)
Check TCR data.
(specified rang: 6 to 8 %)
NO Go to next step.
4
IDC output value is around 4.3 V. NO Clean IDC sensor and exe-
cute the image stabilization.
Check image transfer belt for
damage and correct as nec-
essary.
5 Level history data
check results
Low TCR and low Vg and Vdc YES Go to step 10.
6 Low TCR and high Vg and Vdc YES Go to step 14.
7
TCR falling within specified range
and low Vg and Vdc
YES Go to step 10.
8
TCR falling within specified range
and high Vg and Vdc
YES Go to step 14.
9
The situations other than the above-
mentioned.
YES Go to step 10.
10 Imaging unit Dirty on the outside. YES Clean.
11
PH unit The surface of the PH window is
dirty.
YES Clean with cleaning jig.
12
Transfer belt unit Transfer belt unit makes positive
contact with plates on rails.
NO Check and correct contacts.
13
Is abnormality found in the cam
gear?
YES Change transfer belt unit.
d-Color MF201
Service Manual Y109660-1
d-Color MF201

Olivetti d-Color MF201 Specifications

General

Brand	Olivetti
Model	d-Color MF201
Category	All in One Printer
Language	English