Gestetner G060, Service Manual

Page: 138 / 1106

SC TABLE
G060 4-24 SM
SC No. Item Definition Possible Cause
Related
SCs
Troubleshooting Procedure Type
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.
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.
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. CTL
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.
CTL
SC 660 BCU NVRAM
read/write
diagnostics
error A read/write diagnostics error
is detected when the main SW
is turned ON.
Note: This only occurs with the
8kB NVRAM.
•
Defective 8kB
NVRAM (BCU)
1. Turn the main switch OFF/ON.
2. Replace the NVRAM.
⇒
Rev. 09/2003