Kyocera FS-C1020MFP Plus Service Manual page 113

System Maintenance Reference
1. Check the connectors.
2. Replace the laser optics unit.
3. Replace the EGB.
LD error
The IPU (EGB) detects a problem at the LD unit.
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 Worn-out LD
 Disconnected or broken harness of the LD.
1. Replace the laser optics unit.
SC 3xx (Charge Error)
High voltage power output error
The measured voltage is not correct when the EGB measures each charge output
(charge, development, image transfer belt unit, and transfer unit).
Disconnected or defective high voltage harness

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 Defective high voltage power supply
 Defective EGB
1. Check or replace the harnesses.
2. Replace the high voltage power supply board
3. Replace the EGB.
Black drum motor error
The LOCK signal error is detected when the EGB monitors the black drum motor
state. (This monitoring is done immediately after power-on, when the motor starts
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rotating, and immediately after the motor stops.)
 Disconnected or defective motor harness.
 Motor slips due to excessive load
1. Check the harness from the black drum motor. Replace it if necessary.
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