Ricoh FT5580 Service Manual page 178

12 June 1987
Code #22: Scanner Home Position Not Off
Definition:
During a copy cycle, code #22 lights if the scanner drive motor is turning
and the home position sensor is deactuated and stays deactuated.
Observation:
D u r i n g a c o p y c y c l e , t h e s c a n n e r l e a v e s t h e h o m e p o s i t i o n , a n d t h e n
stops.
Points to Check:
C h e c k t h a t t h e s c a n n e r i s w o r k i n g p r o p e r l y .
C N 3 0 5 - 3 o n t h e o p t i c s b o a r d .
scanner driver pulley screws.
Code #24: No Home Position Signal
Definition:
Lights if the main board does not receive the H.P. signal from the optics
board within 20 seconds after the scanner return signal.
Observation:
Code 24 is displayed in 20 seconds.
Points to Check:
Check CN106-5 and 6 on the main PCB.
Check CN304-4 and 5 on the cptics control board.
Code #25: Abnormal Encoder Pulse
Definition:
Lights if the scanner drive motor starts turning in the wrong direction.
Observation:
C o d e # 2 5 i s d i s p l a y e d i m m e d i a t e l y a f t e r t h e s c a n n e r d r i v e m o t o r i s
energized.
Points to Check:
Check CN306-2 and CN306-3 on the optics board.
Otherwise, check the scanner wire or
10-2
I f i t i s w o r k i n g , c h e c k