Ricoh Da-P1 Field Service Manual page 184

6. Troubleshooting
SC No.
SC544-00
SC No.
SC545-00
SC No.
SC547-01
182
Level Error Name/Error Condition/Major Cause/Solution
Fusing (Center) thermopile high-temperature detected (hardware)
The hardware high-temperature error Sensor flag is detected.
• Damaged triac (shorted)
• Failed the engine board
A
• Failed fusing thermistor
• Abnormal fusing control software behavior
• Clear the SP: fusing SC.
• Replace PSU when triac is blown.
• Replace engine board and/or fusing thermistor.
Level Error Name/Error Condition/Major Cause/Solution
Fusing (Center) heater stay ON
The thermistor (center) has not detected the target temperature, even after
the fusing heater stays ON for more than 30 seconds after reloading.
A
• Deformed or floating thermistor
• Broken fusing lamp wire
• The overtemperature prevention mechanism started working.
Clear the SP: fusing SC.
Level Error Name/Error Condition/Major Cause/Solution
Zero-crossing error (adhered relay contact)
When the fusing relay is in an OFF state, a "zero-crossing interrupt
request" occurs in 50 ms.
Damaged fusing relay (adhered contact)
D
Failed fusing relay driving circuit
• Turn the main power off/on.
• Replace the PSU when fusing relay is broken.
• Check the connection between PSU – engine board.
• Replace the board and/or harness