Ricoh MP C6502SP Field Service Manual page 1138

5. Troubleshooting
SC No.
SC543-00
SC No.
SC544-00
1136
Level Error Name/Error Condition/Major Cause/Solution
Sensor 1: Heating Roller Center: Overheat detection (software)
(T3) degrees centigrade or higher was detected for (t6) seconds
consecutively.
Number of times: 10 or more
D135 (Japan):T3 = 250, t6 = 1
D136 (Japan)/D135 (NA): T3 = 250, t6 = 1
D136 (NA)/D135 (EU)/D136(EU): T3 = 250, t6 = 1
D137 (Japan): T3 = 250, t6 = 1
A
D138 (Japan)/D137 (NA)/D138 (NA)/D137 (EU)/D138 (EU): T3 =
250, t6 = 1
Monitored at: All times, though SC is not issued when temperature is not
controlled (when in off mode/sleep mode, when a door, excluding the
toner supply door, is open, or when the heater relay is off).
• Triac shorted.
• IOB board defective.
• Replace the IOB board.
• Replace the unit.
Level Error Name/Error Condition/Major Cause/Solution
Heating Roller Center: Overheat detection (hardware)
Hardware detection of overheat condition.
The heating roller center thermopile was detected as the cause.
• IOB defective
• Fuser control software running out of control
A • Heating roller center thermopile defective
• IH inverter supplied continuously (software error or temperature
sensor malfunctioning
• After removing the cause of the SC, set "Fusing SC Clear" in the SP
mode.
• If necessary, replace: IOB/heating roller center thermopile/IH
coil/IH inverter.