Ricoh Gim-MF1a Field Service Manual page 154

6. Troubleshooting
SC No.
SC554-00
SC No.
SC557-00
SC No.
SC559-00
152
Level Error Name/Error Condition/Major Cause/Solution
Fusing (End) thermistor high-temperature detected (hardware)
The hardware high-temperature error sensor flag is detected.
• Damaged triac (shorted)
• Failed engine control board
• Failed fusing thermopile
• Failed fusing thermistor
• Abnormal fusing control software behavior
A
• The PWM signal is continuously supplied from the IH inverter (due to
a software or temperature sensor error).
• Clear the SP: fusing SC.
• Replace the PSU.
• Replace the Engine Board.
• Replace the fusing thermopile.
• Replace the Fusing Unit.
Level Error Name/Error Condition/Major Cause/Solution
Zero-crossing frequency exceeded
The number of zero-crossing interrupts exceeds a certain value in 500
ms.
C
The frequency of the commercial power supply line is unstable or noise
occurs.
None
Level Error Name/Error Condition/Major Cause/Solution
Fusing jam detected 3 times in succession
Fusing jam is detected three times in succession.
A
Paper is wrapped around the fusing roller.
Clear the SP: fusing SC.