Ricoh FT4480 Field Service Manual page 225

15 March 1987
21 SCANNER HOME POSITION SENSOR NOT ON
- Possible Causes -
• Scanner does not move to home position at power on.
• Home position sensor failure
- Action -
Move the scanner away from the home position. Turn the main switch off and
on. Does the scanner move to the home position.
Y N
I
Check/repair the scanner drive mechanism.
Manually activate the home position sensor. Does CN101-B5 go from LOW to
HIGH?
Y N
I
Replace the home position sensor.
Replace the main board.
9-20