Table of Contents
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Service Manual
Table 5-12.
Cause
main motor coil may be
or shorted.
The
board maybe
bad.
The
sensor maybe bad .
feed roller maybe bad.
Table 5-13. The LCD Displays PAPER JAM
Cause
The
sensor maybe
bad.
sensor may be
The EXIT
bad.
Rev.
The LCD Displays FEED JAM (3) (Continued)
Step
Checkpoint
Disconnect connector
on the
and check the coil
resistance between: pin 1
and pin 3; pin 1 and pin 5;
pin 2 and pin 4; and pin 2
and pin 6 (four points total)
on the disconnected cable
side of the connector, using
a
Pin 1 — Pin 3
Pin 1 — Pin 5
Pin 2 — Pin 4
Pin 2 — Pin 6
Are the resistances of all
four points approximately 8
ohms?
If any coil is shorted, check
the main motor drive circuit
using the following
procedure:
1. Set the
resistance check mode.
2. Place the (-) terminal of
the
5, 4, or 6 of connector
on the
board.
3. Place the
pin 8 of connector
on the
Does the
any current?
3
—
4
"
5
—
Checkpoint
Step
—
—
Finding
4
board
No
to
on pins 3,
Yes
terminal on
1
board
detect
—
—
—
at Power
Finding
—
—
Troubleshooting
Solution
Replace the main
motor.
Replace the
board.
Replace the
board.
Replace the
sensor.
Replace the feed
roller.
Solution
Replace the
sensor.
Replace the EXIT
sensor.
5-9
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