Ricoh MP C307 Field Service Manual page 434

SC3xx: Image Processing
SC3xx: Image Processing
Image Processing 1: Charge and Development
No. Type
SC312-01 D Charge roller feed back voltage error: Bk
SC312-02 D Charge roller feed back voltage error: Cy
SC312-03 D Charge roller feed back voltage error: Ma
SC312-04 D Charge roller feed back voltage error: Ye
The feedback voltage of the charge AC for each color is 0.15V or less for consecutive 200ms
after the charge AC is activated in the standard or half line speed.
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Troubleshooting procedure:
1.
2.
3.
4.
5.
No. Type
SC325-00 D Development motor (CMY) error
The motor LOCK signal is detected for more than 2 seconds while the motor START signal is
ON.
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428
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Disconnected/incorrect harness for the power pack
Damaged/incorrect PCU
Power pack failure
Disconnected harness/connector
Check the drum condition:
Check the terminal to see if there is dust, damage, or deformation. Check the continuity
as well.
If not good, replace the PCDU. If the SC reoccurs, go to the next step.
Check all the related connectors are firmly connected:
If not good, reconnect the connector. Check if the SC reoccurs by cycling the power
off/on. If the SC reoccurs, go to the next step.
Check the mainframe condition:
Check if there is dust on the terminal for charging, or any damage/deformation. Check
the continuity between the power packs and charging terminal.
If the SC reoccurs, go to the next step.
Check the power pack:
Try installing a new power pack to determine whether the power pack is the cause. If the
SC does not occur with the new one, the old power pack was defective.
Replace the BiCU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
PCDU overload
Defective the motor