Epson LQ-510 - Page 188

REV.-A TROUBLESHOOTING
Table 5-8. Printer Mechanism Repair (Cont.)
Problem Symptom
Cause
Checkpoint
Solution
Ribbon feed Ribbon is
Ribbon car-
Dismount the ribbon cartridge, rotate its knob manually,
Replace the
s defective. not fed. tridge is and check whether the ribbon feeds normally.
ribbon
defective.
cartridge.
Foreign Check whether the ribbon driving gear rotates when
Remove any
substances the carriage is moved manually.
foreign
are caught
substance.
in the gears.
Replace the
ribbon-feed
mechanism.
Ribbon
Planetary
Move carriage manually, and check whether the
Replace the
feeds lever is planetary lever turns in reverse and engages the gear.
ribbon-feed
properly only defective.
mechanism.
with the car-
riage moving
in one
direction
(i.e., fails to
feed when
the carriage
moves in the
other
direction).
Paper Ink stains
Ribbon Check whether the ribbon mask is in the correct
Reset the
becomes appear on
mask is not position.
ribbon mask.
stained.
areas where correctly
there is
positioned.
printing.
Platen gap Set the gap to the second position, and check the gap
Adjust the
is adjusted.
between the tip of the printhead and the platen. The
gap (refer to
appropriate value is 0.45 mm.
Section
4.3.1, Platen
Gap Adjust-
ment).
Printing
Printing
Paper-end
Check paper-end sensor switch.
Replace the
continues
continues
sensor is paper-end
past the end past the end defective.
sensor.
of paper, or of paper.
when no
paper is in
place.
LQ-510
5-23