Gestetner B147 Service Manual page 235

SC No. Item
SC 686 BCU-IPU • After the machine is
communication
error
• The break signal is received
• Timeout occurs while the
SC 687 Memory The BCU does not receive a
address memory address command
command error from the controller 60 seconds
after paper is in the position for
registration.
SC GAVD I2C
• The I2C bus device ID is not
690- communica-tion
001 error
690-001: Y
• A device-status error occurs
690-002: M
690-003: C
690-004: K
• The I2C bus communication
SM
Definition
• Board connector
powered on or recovering
from the power save mode,
timeout occurs during BCU • Board connector
communication.
after the communication is
normally established with • Board connector
the BCU.
communication with the • BCU board defective
BCU is retried after a
• IPU board defective
communication error.
• Controller board
• Motherboard
• Loose connection
• Defective controller
• Defective BCU
• Loose connection
identified during • Defective BCU
initialization.
• Defective LD
during I2C bus
communication.
is not established due to an
error other than a buffer
shortage.
Related
Possible Cause
SCs
between BCU and
controller loose
between controller
and motherboard
loose
between motherboard
and IPU loose
defective
defective
controller board
4-33
Troubleshooting Procedure
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 motherboard.
4. Check the cable connection between
motherboard and IPU.
5. Replace the BCU board.
6. Replace the IPU board.
7. Replace the controller board.
8. Replace the motherboard.
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.
1. Turn the main switch off and on.
2. Check the cable connection.
3. Replace the laser optics housing unit.
4. Replace the BCU board.
SC TABLE
Type
D
D
D
B147/B149/B190