Service manual

SC TABLE
SM 4-13 G130/G131
SC No. Item Definition Possible Cause
Related
SCs
Troubleshooting Procedure Type
SC 230 FGATE error
230-001: Y
230-002: M
230-003: C
230-004: K
• The BCU generates the
FGATE signal based on the
registration sensor ON
timing. Then it sends the
signal to the LD units. The
LD units send a feedback
signal to the BCU. When the
LD units start emitting laser
beams, the feedback signal
changes from High to Low.
• The SC code generates
when the BCU receives no
feedback signal (stays High)
from the LD unit 1 second
after paper reaches the
position where the laser
should start writing.
• Poor connection
between BCU and LD
units
• Defective BCU
• Defective LD unit
1. Turn the main switch off and on.
2. Check the cables between the LD
units and the BCU.
3. Replace the laser optics-housing
unit.
4. Replace the BCU.
D
SC 231 FGATE timeout
231-001: Y
231-002: M
231-003: C
231-004: K
When LD units emit laser
beams to print a job, the
feedback signal stays Low. The
signal becomes High after
laser exposure for a page is
completed. The SC code is
detected in the following cases:
• When the feedback signal
stays Low 7 seconds after
completing the laser
exposure, or
• When the feedback signal
stays Low until the laser
exposure timing for the next
page in multi-page print
mode.
• Poor connection
between BCU and LD
units
• Defective BCU
• Defective LD unit
1. Turn the main switch off and on.
2. Check the cables between the LD
units and the BCU.
3. Replace the laser optics-housing
unit.
4. Replace the BCU.
D