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Troubleshooting
Service Manual
Table 5-6. The LCD Displays Paper Empty or Feed Jam
Cause
Step
Checkpoint
Finding
Solution
Connector for paper
take-up
maybe
1
Is connector disconnected?
Yes
Connect it.
disconnected.
Disconnect connector
on
the
board and check
coil resistance between pin 1
and pin 2 on
the disconnected cable side
No
Replace the paper
of the connector using a
take-up solenoid.
Is the resistance approximately
31 ohms?
The paper take-up
If the coil is shorted, check the
solenoid coil may be open
2
solenoid drive circuit using the
shorted.
procedure below:
1. Set the
for
resistance check mode.
2. Place the (-) terminal of
Replace the paper
the
on pin 2
Yes
take-up solenoid
of connector
on the
and the
board.
board.
3. Place the
terminal of
the
With power on, does the
detect any current?
Disconnect connector
on
the
board and check
the
resistance between:
pin 1 and pin 5; pin 2 and pin
5; pin 3 and pin 5; and pin 4
and pin 5(4 points total) on the
disconnected cable side of the
Replace the main
connector using a
motor.
Pin — Pin 5
Pin 2- Pin 5
Pin 3 — Pin 5
Pin 4 — Pin 5
Are the resistances of all four
main motor coil may
points approximately 5 ohms?
open or shoaled.
If any coil is shorted, check the
main motor drive
using
the following procedure:
1. Set the
to
resistance check mode.
2. Place the (-) terminal of the
on pins 1,2, 3,
Replace the
or 4 of connector
on
board.
the
board.
3. Place the
terminal on
pin of connector
of
the
board
With power on, does the
detect current?
take-up sensor
4
Is paper take-up sensor flag
Yes
Reseat the paper
maybe incorrect.
position incorrect?
t
sensor flag.
Replace the paper
take-up roller
5
—
bad.
—
t
roller.
I
.
“
, f
5-4
Rev.