Ricoh M0A0 Service Manual page 255

SC No. Level
00 The scanner home position sensor does not detect the scanner coming back to the home
position.
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Check if the SC occurs by turning the power OFF then ON. If the SC occurs again, do the
following steps.
1.
2.
SC No. Level
SC141-00 D Black level correction error
The automatic adjustment has failed to correct the black level to the permissible range.
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Turn the main power OFF and then ON.
SC No. Level
SC142- D White level correction error
00
The automatic adjustment has failed to correct the white level to the permissible range.
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Check if the SC occurs by turning the power OFF then ON. If the SC occurs again, do the
following steps. Check if the SC reoccurs by cycling the power after each step.
1.
2.
Error Name/Error Condition/Major Cause/Solution
Defective scanner home position sensor
Defective scanner home position sensor harness
Defective scanner motor driver
Defective scanner motor
Timing belt, pulley, wire, or carriage not installed correctly
Reconnect the power/signal harness.
Replace the following parts:
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Replace the HP sensor
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Replace the scanner motor
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Replace the harness.
Error Name/Error Condition/Major Cause/Solution
Defective scanner carriage
Defective BiCU board
Defective harness
Error Name/Error Condition/Major Cause/Solution
BiCU defective
Harness defective
Connector defective (disconnected, loose)
Condensation in scanner unit
White plate dirty or installed incorrectly
Reconnect the following connectors;

Scanner Carriage - BiCU harness (FFC)
 BiCU - LEDB harness (FFC)
Replace the scanner carriage.
6.Troubleshooting
243