Gestetner G060 Service Manual page 511

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