6
.5.2.(5) Paper transport jam
(5-1) Transport jam occurred immediately after turning on the printer.
Confirmation Items
Cinfirmation Tasks
Action at NG
(5-1-1) Check paper-feeding route condition
Paper-feeding route inside
the front unit
Check whether the paper jam occurred during the route.
Remove the jammed
paper.
(5-1-2) Check the mechanical parts' condition
Check the sensor lever of
the WR sensor.
Check whether there is something abnormal about the
form of sensor lever and its movement.
Replace the sensor
lever with a new
one.
(5-1-3) Check the electrical parts' condition
Check the condition of
sensor signal detection.
By using the switch scanning test function of the
maintenance utility, check whether the sensor signal has
been normally detected.
Replace the main
board (M32PCB) or
front sensor board
(MIP PCB) or the
connecting cable
with new one.
Check the output level of
WR sensor.
Check the following signals of FSNS connector of main
board (M32PCB).
4pin: WR sensor
Operate and adjust the sensor lever in order to check the
signal level.
Replace the front
sensor board (MIP
PCB) with a new
one.
Check the power supply
of front sensor board (MIP
PCB).
Check the power supply of 5V of CN connector of front
sensor board (MIP PCB).
1pin: 5V power supply
5pin: 0VL
Replace the
connecting cable
with a new one.
178
Service Manual
Y108500-4