Gestetner B070 Service Manual page 332

SERVICE CALL CONDITIONS
SC336: Polygonal Mirror Motor Error 2
Definition [B]
The XSCRDY signal (polygon mirror motor ready signal) does not go HIGH
(inactive) within 20 s after the polygonal mirror motor switches off.
NOTE: For details, see the illustration for SC335.
Possible Causes
• Poor connection between the polygon mirror motor control PCB and I/F
harness
• Polygonal mirror motor, polygon mirror motor control PCB, or LDB board
defective
• IPU defective
SC337: Polygonal Mirror Motor Error 3 (SCRDY Signal Error)
Definition [B]
While the polygonal mirror motor is rotating normally, the lock signal (XSCRDY or
polygon mirror motor ready signal) is detected HIGH (inactive) even though the
motor has not been switched off nor has the motor rotation been changed.
NOTE: For details, see the illustration for SC335.
Possible Causes
• Electrical noise interfering with the lock signal (XSCRDY)
• Poor connection between polygonal mirror motor control PCB and I/F
harness
• Polygonal mirror motor or LDB defective
SC338: Polygonal Mirror Motor Error 4
Definition [B]
The XSCRDY signal (polygon mirror motor ready signal) does not stabilize within
20 s when:
• The motor is switched ON or OFF
• After the rotation of the motor has been changed
NOTE: For details, see the illustration for SC335.
Possible Causes
• Poor connection between the polygonal mirror motor control PCB and the I/F
harness
• Polygonal mirror motor or LDB defective
B070/B071
CÓPIA NÃO CONTROLADA
4-12
CÓPIA NÃO CONTROLADA
SM