Ricoh Robin Service Manual page 248

SERVICE CALL CONDITIONS
Check the voltage at CN105-2 to 5 on the main board when the main
switch is turned on.
17 volts 24 volts
Replace the main board.
Replace the scanner motor.
Is there 5 volts at CN103-11 on the main board when the scanner H.P.
sensor is actuated.
Yes No
Replace the scanner H.P. sensor.
Replace the main board.
6-30
24 June 1994