Toshiba f97j050 Service Note
BSI(Service Note) TOSHIBA
TOSHIBA TEC CORPORATION
2-4-1, Shibakoen, Minato-ku, TOKYO, 105-8524 JAPAN
BSI No
F97J050
SUBJECT
C3500 Error Troubleshooting
MODEL
CATEGORY
Treatment in the field
--------
CONTENT
Troubleshooting for C3500 is listed below. When an error occurs in the C3500, perform the following
checks and treatment.
1. Confirmation Items
No.
1 Are there more than one problem
2
FC70
FIELD APPLICATION
To be applied when necessary
FACTORY APPLICATION
Check Point Result Treatment
NO Solve the trouble by opening and closing the
items when screen "State Confirm"
-->Stabilizer Trouble is opened in the
service mode?
Confirm combination of problem
items in the Stability Trouble screen
BK developer only ---- Go to treatment item No. 1
BK developer + PC ---- Go to treatment item No. 8
BK developer + VO sensor ---- Service Manual T- 91 (7) Treat VO sensor
BK developer + C + M + Y developer ---- Service Manual T-91 (6) Perform OFF/ON
---- --------------------
front cover, and after reinitializing the C3500,
check the Stability Trouble screen.
(If a problem is found, go to No. 2)
failure
motion of Main SW after treating AIDC sensor
failure
Date
UNIT
General
97/10/30
----
2. Treatment Items
No.
1 The value of DEV. BK in element
data BK should be close to 3000 and
η value lower than 1000. Check if the
image is smooth.
2 Check if the AIDC sensor has
become dirty or the adjustment data
have shifted (4+0.1V, 4-0.1V)
3 Has C3500 or a problem appeared
after replacement of developer
material? (Has the life counter been
cleared, after performing
compensation of BK when
replacing?)
Check Point Result Treatment
YES Replace developer material
YES Clean or replace the AIDC sensor and readjust
the AIDC sensor.
YES If more than 10 copies are made, it is
necessary to replace the developer material
and perform compensation after clearing the
life counter.
BSI No. F97J050 Page 2
4
The value of η and BK constant in
the element data BK cannot be
stabilized for each copy.
5 Did COF38 appear before C3500?
Is the value of η and Stick in element
data BK shown at a very low level? (
η is below than 1500, Stick is below
than 100)
6 Is there any toner caked in the toner
hopper?
7 When supplying black toner by
opening the toner supply screen in
the developer mode, check whether
or not the toner supply motor starts to
rotate.
Notes:
The toner supply motor does not
rotate if the value of BK Constant in
the element data is shifted to higher
than the specification value.
8 1) Turn ON the Main SW with the pre
run mode OFF.
2) Confirm condition of the test
copies which are taken using the
following procedures
[Press the START key selecting half
tone (Black), 64 LIMOS 1 by opening
the test print screen in the service
mode]
9 Is the mesh of the main charger
getting dirty or has cleaner stopped
at other than its home position?
10 Is the window of PH lower Assy.
getting dirty?
11 Is there any object interfering with
the LD optical path.
12 Check if no resolution can be
reproduced in low image density
areas or no thin lines in the FD
direction.
13 Check whether or not a different type
of toner is used
14 Measure the grid voltage of the main
charger using a tester with the Main
SW turned ON and confirm its output
voltage change to 500V -> 900V ->
700V
YES Make 10 copies after turning the Main SW
OFF and ON. Then perform gamma automatic
compensation after turning the Main SW OFF
and ON. Repeat this operation 10 times.
YES Go to No. 8
YES Stir the caked toner in the toner hopper with a
screw driver. Instruct users to shake the toner
bottle when installing a new one.
NO 1) Check rotating condition of each roller and
gear, and clean the toner hopper unit or
replace the whole unit if any abnormality is
found.
2) Clean the contact point of the drawer CN
for the toner hopper and machine.
3) Check the wiring condition from PWB-1 to
M9.
4) Check whether overload has been applied
on the motor drive unit; if there is no
abnormality, replace the M9.
5) If there is no problem in the above (1) to
(4), replace PWB-1.
White
Go to 9
band
with FD
direction
Low
Go to 12
density
Solid
Go to 14
black
YES Change the mesh or replace the main charger
unit.
YES Clean the window of PH lower Assy.
YES Check the fixing condition of the covers in the
optical path. Remove foreign material in the
optical path.
YES Replace PH Assy, PWB-JA or PU1.
Concerning PU1, the failure of + or - 12V for
PH may be considerable.
YES Replace BK toner in the toner hopper with the
proper one. Replace BK developer material.
NO Check the wiring condition through PWB-1 to
HV1 and check connectors on HV1. If any
abnormality is found, replace the HV1.
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