Ricoh Robin Service Manual page 249

24 June 1994
2.5 CODE #22 — SCANNER HOME POSITION ERROR
- Definition -
The scanner home position sensor's output remains HIGH (actuated) for 1.0
second after the scanner starts.
- Possible Causes -
Scanner home position sensor failure
•
Defective scanner motor
•
• Defective main motor
Defective dc power supply board
•
Incorrect scanner drive wire position
•
Defective dc harness
•
CN103 or CN105 on the main board is not correctly connected.
•
FU202 on the dc power supply board open (blown fuse).
•
- Action -
Turn the main switch off and on actuator position.
Check the position of the 1st scanner sensor actuator.
Deactuated Actuated
Does the scanner motor rotate when the main switch is turned on?
No Yes
Correct the scanner drive wire position.
Check the voltage at CN106-2 on the main board.
24 volts 0 volts
Check FU202 on the dc power supply board.
Good
Replace the dc power supply board.
Check the voltage at CN105-1 and 6 on the main board.
24 volts 0 volts
Replace the main board.
SERVICE CALL CONDITIONS
No Good
Replace FU202
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