Sc240-00 - Ricoh MP 305 Plus Field Service Manual

6. Troubleshooting
Type
D
Symptoms
• SC230-00
An FGATE signal is not sent even when the laser is ready to be emitted.
• SC231-00
The FGATE signal does not go OFF even when laser emission is going to end.
These SCs are detected during printing.
Possible Causes
• The connection between the BiCU and the controller is loose.
• The BiCU is malfunctioning (damaged Laser ASIC).
Troubleshooting Procedures
1. Turn OFF then ON the main power.
2. Check the connection between the BiCU and the controller.
3. Replace the BiCU.

SC240-00

Error Name
LD Error
Type
D
Symptoms
• During light emission, the LD current exceeds the prescribed current.
• The LD driver cannot be initialized.
• The LDB harness is defective.
This SC is detected when the machine starts up, or when it is printing.
Possible Causes
• The LDB harness is loose.
• The LD has deteriorated (LD is damaged, or the current-to-output optical power characteristic
is not good).
• The LDB is malfunctioning (the LD driver is defective).
• The LDB harness is loose (disconnected).
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