Gestetner G060 Service Manual page 514

SC TABLE
SC No. Item
SC 685 SBU-IPU
communication
(CF)
error
SC 686 BCU-IPU
communication
(CF)
error
SC 687 Memory address
command error
G570
Definition
• During data transfer, a • Scanner unit cable
checksum error occurs.
• During any operation • SBU board defective
• IPU board defective
except initialization, the
• External noise
SBU sends a hardware-
reset acknowledgement
to the IPU.
• After the machine is • Board connector
powered on or recovering
from the power save
• Board connector
mode, timeout occurs
during BCU
communication.
• The break signal is
• Board connector
received after the
communication is
normally established with
• BCU board defective
the BCU.
• Timeout occurs while the
• IPU board defective
• Controller board
communication with the
BCU is retried after a
communication error. • Bridge board
• Loose connection
The BCU does not receive a
• Defective controller
memory address command
• Defective BCU
from the controller 60
seconds after paper is in the
position for registration.
Related
Possible Cause
SCs
connector loose
between BCU and
controller loose
between controller
and bridge board
loose
between bridge board
and IPU loose
defective
defective
4-32
Troubleshooting Procedure
1. Turn the main switch off and on.
2. Shut out the external noise.
3. Check the cable connection of the
scanner unit.
4. Replace the SBU board.
5. Replace the IPU board.
1. Turn the main switch off and on.
2. Check the cable connection between
the board connector and BCU.
3. Check the cable connection between
controller and bridge board.
4. Check the cable connection between
bridge board and IPU.
5. Replace the BCU board.
6. Replace the IPU board.
7. Replace the controller board.
8. Replace the bridge board.
1. Turn the main switch off and on.
2. Check if the controller is firmly
connected to the BCU.
3. Replace the controller.
4. Replace the BCU.
Type
B
B
B
SM