Service Call Conditions
G160/G161 4-6 SM
SC
[Level]
Symptom Possible Cause/Required Action
Laser Synchronizing Detection Error: LDB of the leading edge [K]
220
[D]
The laser synchronizing
detection signal for LDB [K]
of the leading edge is not
output for two seconds after
LDB unit turns on while the
polygon motor is rotating
normally.
Disconnected cable from the laser
synchronizing detection unit or defective
connection
Defective laser synchronizing detector
Defective LDB
Defective EGB
1. Check the connectors.
2. Replace the laser-synchronizing
detector.
3. Replace the LDB.
4. Replace the EGB.
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
Same as SC 221
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