C0B75:Punch Control Board Malfunctions - Konica Minolta bizhub C350 Service Manual

Trouble code
2.3.8

C0B75:Punch Control Board malfunctions

A. Detection timing
Malfunction code
No response is received to a request made by the Finisher within a given period of
time during initial communications.
No response is received to a request made by the Finisher within a given period of
time during ordinary communications.
C0B75
There is no match in the checksum values of the backup data as checked twice.
The 24 V power source of the Punch Unit is OFF when an operation request is
made from the Finisher.
B. Action
Finisher Control Board (PWB-A FN)
Punch Control Board (PWB-B PK)
Step
1 Turn OFF and ON the main switch.
Check the connection condition between
2
the Punch Unit and PWB-A FN.
Measure the voltage between CN14-5
3 (+) and CN14-3 (-) of the PWB-A FN. Is
the voltage 24VDC?
4 Initialize Punch Unit EEP-ROM.
5 PWB-B PK replacement
6 PWB-A FN replacement
4-18
Relevant electrical parts
Action
FS-601 Field Service Ver2.0 Sep. 2004
Description
WIRING DIAGRAM
Control signal
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Location
(Electrical compo-
nents)
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C-1
E-6