Epson LX-1050+ Service Manual page 78

Troubleshooting
Table 5-17. Self-test Printout has Poor Quality (2)
Cause
Paper feed mechanism
may be bad.
The paper feed motor
may be dead.
bad.
Table 5-18. Abnormal Printing in On-line Mode (1)
Cause
The bi-directional
printing value may be
bad.
5-10
Checkpoint
Step
Check the paper feed mechanism
,
gears and rollers.
Are there OK?
Disconnect on the TAMA
check the coil resistance
board and
between: pin 12 and pin 10; pin 8
and pin 10; pin 11 and pin 9; pin 7
and pin 9 (4 points total) on the
disconnected cable side using a
Pin 12- Pin 10
Pin 8- Pin 10
Pin 11- Pin 9
Pin 7- Pin 9
Are the resistances of all four
points approximately 40 ohms?
If any coil is shorted, check the
paper feed motor drive circuit using
the following procedure:
1. Set the multimeter to
resistance check mode.
2. Place the (-) terminal of the
connector CN5 on the TAMA
board.
3. Place the (+) terminal on pin 2 of
connector CN7 on the TAMA
board. (GND)
With power off, does the
—
Step Checkpoint
1 —
Finding Solution
Replace or
reassemble
No
gears and rollers.
Replace the
No
paper feed motor.
Replace the
paper feed motor
with TAMA board.
Reassemble the
—
paper path.
Finding Solution
Adjust the
—
printing position.
(Refer to chapter
4)
Rev. A