Ricoh FT5540 Service Manual page 416

31 August 1989
Code #2A: 4th/5th Mirror Home Position Sensor Stays Low
Definition:
Lights if the 4th/5th mirror sensor does not actuate within 1.83 seconds after the mirror motor
is turned on.
Observations:
At power-up, the 4th/5th mirror drive rotates counterclockwise past the home position sensor.
If the main switch is turned off and on, the mirror motor emits a noise and stays at the home
position.
Points to Check:
Check if the 4th/5th mirror assembly is moving properly.
Check CN305-12 on the optics board. Check the 4th/5th mirror section, optics board, and
mirror drive motor motor.
Code #2B: 4th/5th Mirror Sensor Stays High
Definition:
Lights if the 4th/5th mirror home position sensor remains actuated for 1.83 seconds after the
mirror motor turns on.
Observations:
At power-up, the 4th/5th mirror drive rotates clockwise and the actuator leaves the home
position sensor. If the main switch is turned off and on, the drive pulley continues to drive in a
clockwise direction until the mirror motor emits a noise and stops at the extreme right.
Points to Check:
Confirm that the second scanner moves properly.
Check CN305-12 on the optics board. Check the 4th/5th mirror section, optics board, and
mirror drive motor.
13-4