CHAPTER 6 SELF DIAGNOSIS
6-40
E537
0001
The aligning plate (front) does not leave home position when the alignment
motor (front) is driven for 3 sec.
0002
The aligning plate (front) does not return to home potion when the align-
ment motor (front) is driven for 3 sec.
Main cause
The alignment motor (front; M4) is faulty. The aligning plate home position
sensor (front; PI4) is faulty. The finisher controller PCB is faulty.
E540
0001
The paper surface sensor remains unchanged 10 sec after the tray ascent/
descent motor is driven.
0002
The tray upper sensor goes ON while the tray is moving up.
0003
The clock for the clock sensor is disrupted for 10 sec or more while the tray
ascent/descent motor is driven.
Main cause
The paper surface sensor (PI9) is faulty. The tray ascent/descent motor
clock sensor (PI17) is faulty. The tray upper limit sensor (PI15) is faulty.
The tray ascent/descent motor (M6) is faulty. The finisher controller PCB is
faulty.
E577
0001
The paddle does not leave home position when the paddle motor is driven
for 2 sec or more.
0002
The paddle does not return to home position when the paddle motor is
driven for 2 sec or more.
0003
The stack ascent/descent guide does not leave home position when the
paddle motor is driven for 2 sec or more.
0004
The stack ascent/descent guide does not return to home position when the
paddle motor is driven for 2 sec or more.
Main cause
The paddle home position sensor (PI2) is faulty. The stack ascent/descent
home point sensor Pixx0 is faulty. The paddle motor (M2) is faulty. The fin-
isher controller PCB is faulty.
