Error Name/Error Condition/Major Cause/Solution
• Fusing thermistor defective
• Fusing thermistor connection PCB defective
• IOB (PCB17) defective
• Connector defective or disconnected
Reconnect the following connectors.
• Fusing Thermistor – Fusing Thermistor Connection PCB connector
• Fusing Thermistor Connection PCB – IOB (PCB17) connector
• Connector pin defective
If the I/F connector pins of the fuser unit and the main unit are deformed owing
to foreign materials, replace the connectors or the units including the
connectors.
• Triac defective
Disconnect the power cord and check that the resistance between terminals
T1 and T2 of the triac TRA31 and triac TRA41 on the PSU (PCB18) are
several Mega-Ohms and not shorted. If failed, replace the PSU (PCB18).
• Fusing thermistor defective
Replace the fusing unit.
• Fusing thermistor connection PCB defective
Replace the fusing thermistor connection PCB.
• IOB (PCB17) defective
Replace the IOB (PCB17).
Error Name/Error Condition/Major Cause/Solution
Fusing Thermistor (End) High Temperature
• The fusing thermistor (end) (TS1) detects the temperature that exceeds 245
degrees C.
• The fusing thermistor (end) (TS1) detects the temperature that exceeds 195
degrees C in a heater-off state after the fusing thermistor (end) (TS1) detects
the temperature of 155 degrees C or less.
• Connector pin defective
• Triac defective
• Fusing thermistor defective
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