SERVICE CALL CONDITIONS
SM 4-5 G104
Trouble-
shooting
Item
SC
[Level]
Symptom Possible Cause/Required Action
Leading edge laser detection error: [Y]
222
[D]
The laser synchronizing
detection signal for LDB [Y]
of the leading edge is not
output for two seconds after
LDB unit turns on while the
polygon motor is rotating
normally.
Same as SC 221
Leading edge laser detection error: [M] 224
[D]
The laser synchronizing
detection signal for LDB [M]
of the leading edge is not
output for two seconds after
LDB unit turns on while the
polygon motor is rotating
normally.
Same as SC 221
Leading edge laser detection error: [C] 226
[D]
The laser synchronizing
detection signal for LDB [C]
of the leading edge is not
output for two seconds after
LDB unit turns on while the
polygon motor is rotating
normally.
Same as SC 221
FGATE: On error [K] 230
[C]
The PFGATE ON signal
does not assert within 5
seconds after processing
the image in normal job or
MUSIC for [K] starts.
• Defective connection between the controller
board and EGB
• Defective cable between the EGB and LDB
1. Check the connectors.
2. Replace the LDB.
3. Replace the EGB.
FGATE: Off error [K] 231
[C]
1. The PFGATE ON signal
still asserts within 5
seconds after
processing the image in
normal job or MUSIC
for [K] ends.
2. The PFGATE ON signal
still asserts when the
next job starts.
• Defective connection between the controller
board and EGB
• Defective cable between the EGB and LDB
1. Check the connectors.
2. Replace the LDB.
3. Replace the EGB.
FGATE: On error [Y] 232
[C]
The PFGATE register of
GAVD does not assert
within 5 seconds after
processing the image in
normal job or MUSIC for [Y]
started.
Same as SC 230
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