Epson LX-300 Service Manual page 92

LX-300 Semice Manual
Table 5-9. Repairing the Printer Mechanism (Continued)
Symptom
Problem
The ribbon
feeds properly
only when the
carriage
moves '
The ribbon
feed is
it fails to feed
abnormal.
when the
carnage
moves in the
other
direction).
Paper Ink stains
appear on
becomes
stained with areas where
ink. there is print.
Printing
continues
Printing
after the
continues past
paper ends or
when no
page.
paper is
loaded.
The color
does not
change.
Color printing
is abnormal.
The color
ribbon is not
advanced.
Cause
Move the carriage manually;
n ne
' The planetary
gear turns in reverse and
engages the gear.
The ribbon
mask is Make sure the ribbon mask is
positioned in the correct position.
incorrectly.
The platen Set the gap adjustment lever to
the first position, and check the Swtbn ~ , ,
gap is not
adjusted platen gap. The appropriate
value is 0.47 mm.
correctly.
The PE
sensor is Check the PE sensor.
detective.
Measure the coil resistance for
should be approximately 150
assembly is
ohms. If the motor is shorted,
defective.
also check the drivers on the
driver board.
The
ribbon is
Check
caught in the
mask is defective.
ribbon mask.
Measure the CS motor
should be approximately 150
assembly is
ohms. If the motor is shorted,
defective.
also check the drivers on the
driver board.
The color
Check whether the ribbon
ribbon feed
advances when the printer is
gears are
turned on.
defective.
Troubleshooting
Cheek Point
Replace the
ribbon feed
mechanism.
Reinstall the
ribbon mask.
Adjust the
gap. Refer to
Adjustment.
Replace the
PE sensor.
Replace the
assembly
(and drivers, if
necessary).
to see if the ribbon Replace the
ribbon mask.
Replace the
CS motor
assembly
(and drivers, if
Replace the
ribbon feed
mechanism.
Solution
5-15