Ricoh M160, Service Manual

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Service Call
M160/M161 6-12 SM
6.2.6 SC500 (PAPER FEED AND FUSING)
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC508-00 B
By-pass bottom plate operation error
The signal from the by-pass bottom plate position sensor has
not changed (the signal has not changed from ON to OFF or
vice versa) for 4 seconds or more after the start of reverse Paper
Feed Unit rotation,
If the error is detected three times in succession, the SC number
is displayed on the operation panel.

By-pass bottom plate sensor connector disconnected or
other error

By-pass bottom plate sensor feeler stuck or other error

Turn the main power OFF and then ON.

Check and replace the by-pass bottom plate sensor
connector connection.

Replace the by-pass bottom plate sensor feeler.

Replace the Paper Feed Motor.

Replace the harness.

Replace the BICU.
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC520-00 D
Main motor error
When the main motor is driven, the lock (state of rotation) signal
is checked every 100 milliseconds. If the machine detects the
lock signal in the High status 20 times in succession, it reports
this error.

The main motor incurs too much load from a defective unit.

The main motor is defective.
Replace the defective unit or the motor