Gestetner G060, Service Manual

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SC TABLE
SM 4-29 G570
SC No. Item Definition Possible Cause
Related
SCs
Troubleshooting Procedure Type
SC 620
(CF)
ARDF
communication
error
•
After the ARDF is
detected, the break signal
occurs or communication
timeout occurs.
•
Incorrect installation
of ARDF
•
ARDF defective
•
IPU board defective
•
External noise
1. Turn the main switch off and on.
2. Check the cable connection of the
ARDF.
3. Shut out the external noise.
4. Replace the ARDF.
5. Replace the IPU board.
B
SC 621 Finisher/mailbox
communication
error
SC 622 Bank
communication
error
•
Cable problems
•
BCU problems
•
PSU problems in the
machine
•
Main board problems
in the peripherals
1. Turn the main switch off and on.
2. Check if the cables of peripherals are
properly connected.
3. Replace the PSU if no power is
supplied to peripherals.
4. Replace the BCU or main board of
peripherals.
B
SC 623 Duplex unit
communication
error
While the BCU
communicates with an
optional unit, an SC code is
displayed if one of following
conditions occurs.
1. The BCU receives a
signal which is generated
by the peripherals only
just after the main switch
is turned on.
2. When the BCU does not
receive an OK signal
from a peripheral 100ms
after sending a command
to it. The BCU resends
the command. The BCU
does not receive an OK
signal after sending the
command 3 times.
•
Cable problems
•
BCU problems
•
PSU problems in the
machine
•
Duplex control board
problem
1. Turn the main switch off and on.
2. Check if the cable of the duplex
inverter unit is properly connected.
3. Replace the PSU if no power is
supplied to the peripherals.
4. Replace the duplex control board in
the inverter unit.
B
SC 640 BCU - Controller
communication
error (check sum
error) The check sum of the
interface between the BCU
and controller is not the
same.
•
Defective controller
•
Defective PCU
1. Turn the main switch off and on.
2. Replace the controller.
3. Replace the BCU. B
SC 641 BCU – Controller
communication
error (no
response) The controller does not
receive any response from
the BCU three consecutive
times when sending a signal
every 100ms.
•
Loose connection
•
Defective controller
•
Defective BCU
1. Turn the main switch off and on.
2. Check the connection between the
BCU and controller.
3. Replace the controller.
4. Replace the BCU.
B