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Service Manual
Table 5-10.
Cause
The main motor coil may be
or shorted.
board maybe
sensor maybe bad .
pick-up roller may be bad .
Rev. A
The LCD Displays FEED JAM (1) (Continued)
Checkpoint
Step
Disconnect connector
on the
and check the coil
resistance between: pin
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?
2
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
P/J14 on the
board.
3. Place the
the
connector
Does the
any current?
3
—
4
—
5
—
Finding
4
board
No
to
on pins 3,
Yes
terminal of
on pin 8 of
1 on the
board
detect
—
—
—
Troubleshooting
Solution
Replace the main
motor.
Replace the
board.
Replace the
board.
Replace the
sensor.
Replace the
pick-up roller.
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