Gestetner G060 Service Manual page 512

SC TABLE
SC No. Item
SC 642 Communication
timeout error
(CF)
between
controller and
operation panel
SC 660 BCU NVRAM
read/write
⇒
diagnostics error
SC 670 No response
from BCU at
power on
G570
Definition
• The operation panel does • Controller defective
• Operation panel
not respond to the frame
sent from the controller.
• External noise
• Harness between
A read/write diagnostics • Defective 8kB
error is detected when the
main SW is turned ON.
Note: This only occurs with
the 8kB NVRAM.
• Loose connection
When the main power is
turned on or the machine • Defective controller
starts warming up from
• Defective BCU
energy-saving mode, the
controller does not receive a
command signal from the
BCU.
Related
Possible Cause
SCs
defective
controller and
operation panel
disconnected
NVRAM (BCU)
4-30
Troubleshooting Procedure
1. Turn the main switch off an on.
2. Check the cable connection between
the controller and the operation panel.
3. Shut out the external noise.
4. Replace the controller.
5. Replace the operation panel.
1. Turn the main switch OFF/ON.
2. Replace the NVRAM.
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.
Rev. 09/2003
Type
B
B
SM