Gestetner G060 Service Manual page 138

SC TABLE
SC No. Item
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)
SC 641 BCU –
Controller
communication
error (no
response)
⇒
SC 660 BCU NVRAM
read/write
diagnostics
error
G060
Definition
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.
The check sum of the interface
between the BCU and
controller is not the same.
The controller does not receive
any response from the BCU
three consecutive times when
sending a signal every 100ms.
A read/write diagnostics error
is detected when the main SW
is turned ON.
Note: This only occurs with the
8kB NVRAM.
Related
Possible Cause
SCs
• Cable problems
• BCU problems
• PSU problems in the
machine
• Main board problems
in the peripherals
• Cable problems
• BCU problems
• PSU problems in the
machine
• Duplex control board
problem
• Defective controller
• Defective PCU
• Loose connection
• Defective controller
• Defective BCU
• Defective 8kB
NVRAM (BCU)
4-24
Troubleshooting Procedure
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.
1. Turn the main switch OFF/ON.
2. Replace the NVRAM.
Rev. 09/2003
Type
CTL
CTL
SM