Toshiba e-STUDIO 2555C Service Manual page 764

[C3E0] Developer unit replacement (old-new) detection abnormality
Classification
Copy process related service call
Step Check Item
Check if the old/new detection bar
of the developer unit is being
1
ejected.
Check if the harness of the old/
new detection switch in the
2
developer unit is open circuited.
Is the old/new detection switch of
3
the developer unit normal?
Check if the old/new detection
pusher is moved to the escape
position while the coupling of the
developer unit is rotated by hand.
4
(Is the driving in the old/new
detection pusher section
transmitted?)
Check that the coupling of the
paper feed developer drive unit is
5
driven properly.
Check that the paper feeding/
developer unit drive motor rotates
6
properly. (Input check: 03-112)
Check that the connector of the
paper feeding/developer unit drive
7
motor is connected properly.
Check if the harness of the paper
feeding/developer unit drive motor
8
is open circuited.
Check that the coupling of the
drum TBU drive unit is driven
9
properly.
Check that the connector of the
LGC board (CN310) is connected
10
properly.
Is the harness of the LGC board
11
normal?
Is the LGC board normal?
12
Replacement part
Developer unit old/new detection
switches
Paper feeding/developer unit drive
motor
LGC board
e-STUDIO2555C/3055C/3555C/4555C/5055C
ERROR CODE AND TROUBLESHOOTING
Developer unit replacement (old-new) detection abnormality
Result
Yes
No
Yes
No Replace the harness.
Yes
No Replace the old/new detection switch.
Yes
No Correct the old/new detection pusher
so that it is moved to the escape
position.
Yes Correct the engagement of the
couplings in the paper feed developer
drive unit and the developer unit.
No
Yes
No
Yes
No
Yes
No Replace the paper feeding/developer
unit drive motor.
Yes Correct the engagement of the
couplings in the drum TBU drive unit
and the developer unit.
No
Yes
No Reconnect the connector.
Yes
No Replace the harness.
Replace the LGC board.
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