Ricoh RN-MF1 Service Manual page 121

SC 4xx (Image Transfer and Transfer Error)
Bias leak
An error signal is detected for 0.2 seconds when changing the development unit.
491
• Defective transfer roller
• Defective high voltage power pack
1. Turn the machine's main power off, and then on.
SC 5xx (Motor and Fusing Error)
Main motor error
The machine does not detect a main motor lock signal within 2sec after the main motor started
to rotate.
-or-
The machine does not release a main motor lock signal within 2sec after the main motor switched
off.
-or-
The machine detects a main motor lock signal every 100ms for seven times consecutively, after
500
the main motor started to rotate stably.
• Overload of
• Torque load overload
• Defective main motor
• Disconnect or defective motor harness
1. Turn the machine's main power off, and then on.
2. Check or replace the main motor if the torque load is normal.
3. Replace the motor harness.
Fusing Fan Motor Error
The FAN lock signal – High for 10 seconds, after the fan motor started to rotate.
530
• Disconnected or defective motor harness.
1. Turn the machine's main power off, and then on.
Service Call Conditions
6
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