Gestetner G060 Service Manual page 498

SC TABLE
SC No. Item
SC 230 FGATE error
230-1: Y
230-2: M
230-3: C
230-4: K
SC 231 FGATE timeout
231-1: Y
231-2: M
231-3: C
231-4: K
G570
Definition
• Poor connection
The BCU generates the
FGATE signal based on the
registration sensor ON
• Defective BCU
timing. Then, it sends the
• Defective LD unit
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 is generated
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
When LD units emit laser
beams to print a job, the
feedback signal stays Low
• Defective BCU
and becomes High after
• Defective LD unit
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.
Related
Possible Cause
SCs
between BCU and LD
units
between BCU and LD
units
4-16
Troubleshooting Procedure
1. Turn the main switch off and on.
2. Check the cables between the LD
units and the BCU.
3. Replace the LD unit.
4. Replace the BCU.
1. Turn the main switch off and on.
2. Check the cables between the LD
units and the BCU.
3. Replace the LD unit.
4. Replace the BCU.
Type
B
B
SM