Toshiba DP4500 Service Handbook page 180

[Procedure 2]
Does the bushing attached to the returning roller shaft smoothly move up and down?
NO
Apply grease on the cut-out part of the front side frame with where the bushing
contacts.
YES
Is the spring of the returning roller detached?
YES
Attach the spring.
YES
Is the tension of the stack processing motor drive belt normal?
NO
Loosen the adjustment screw to adjust the tension.
YES
Is the returning roller home position sensor (S3) working properly?
NO
Replace the sensor.
YES
Is the problem solved by replacing the stack processing motor?
NO
Replace the finisher controller PC board.
YES
END
December 2000 © TOSHIBA TEC 5 - 85 DP4500/3500 TROUBLESHOOTING