6. Jam display
Field Service Ver. 2.0 Jan. 2008
14
MT
-502
T
roubleshooting
6.3.3
Transport section misfeed
A. Detection timing
B. Action
Type
Description
Transport section misfeed
detection
The lower transport sensor (PS10) is not turned ON even after the set
period of time has elapsed after the transport sensor (PS2) is turned ON
by the paper.
The upper transport sensor (PS9) is not turned ON even after the set
period of time has elapsed after the lower transport sensor (PS10) is
turned ON by the paper.
Detection of paper remain-
ing in the transport section
The lower transport sensor (PS10) is turned ON when the power switch is
set to ON, a door or cover is opened and closed, or a misfeed or malfunc-
tion is reset.
The upper transport sensor (PS9) is turned ON when the power switch is
set to ON, a door or cover is opened and closed, or a misfeed or malfunc-
tion is reset.
Relevant electrical parts
Transport sensor (PS2)
Lower transport sensor (PS10)
Upper transport sensor (PS9)
MT control board (MTCB)
Step
Action
WIRING DIAGRAM
Control signal
Location (Electrical
components)
1
Initial checks
—
—
2
PS2 I/O check, sensor check
FSCB PJ19-14 (ON)
FS-519 C-7
3
PS10 I/O check, sensor check
MTCB CN102-8 (ON)
MT-502 B to C-4
4
PS9 I/O check, sensor check
MTCB CN101-8 (ON)
MT-502 B to C-3
5
MTCB replacement
—
—
Service Manual Y10846
2
-9
