Gestetner G060, Service Manual

Page: 498 / 1106

SC TABLE
G570 4-16 SM
SC No. Item Definition Possible Cause
Related
SCs
Troubleshooting Procedure Type
SC 230 FGATE error
230-1: Y
230-2: M
230-3: C
230-4: 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 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
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 LD unit.
4. Replace the BCU.
B
SC 231 FGATE timeout
231-1: Y
231-2: M
231-3: C
231-4: K When LD units emit laser
beams to print a job, the
feedback signal stays Low
and 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 LD unit.
4. Replace the BCU.
B