Error Name/Error Condition/Major Cause/Solution
High-temperature hardware error (fusing thermopile (TH2))
After the initial setting is completed at startup or returning from energy saver mode,
the fusing thermopile has detected over 250 °C continuously for 0.03 seconds.
• TRIAC short
• EGB (PCB1) defective
• Fusing thermopile (TH2) defective
• Fusing temperature control software crashed
Enter the SP mode and execute fuser SC reset. Then turn the machine OFF and
ON.
If the SC occurs again, do the following steps. Check if the SC reoccurs by cycling
the power after each step.
1. If TRIAC damaged, replace PSU (PCB4).
2. Replace the EGB (PCB1).
3. Replace the fusing thermopile (TH2).
Error Name/Error Condition/Major Cause/Solution
After reaching reload temperature, the fusing lamp remained on for more than 4
seconds at full power.
• Fusing thermopile (TH2) output abnormal
• Fusing lamp disconnected
• Overheating protection device triggered (blown fusing thermostat)
Enter the SP mode and execute fuser SC reset. Then turn the machine OFF and
ON.
If the SC occurs again, do the following steps. Check if the SC reoccurs by cycling
the power after each step.
1. Replace the fusing thermopile (TH2).
2. Replace the fusing thermostat (TH1).
3. Replace the fusing sleeve belt unit.
Error Name/Error Condition/Major Cause/Solution
Fusing lamp remains ON: Low voltage
After reaching reload temperature, the fusing lamp remained on for more than 4
seconds at full power. AND the power supply voltage is lower than specified
voltage.
• Fusing thermopile (TH2) output abnormal
• Fusing lamp disconnected
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