Epson LQ-570+ Manuale di servizio - Pagina 41

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Epson LQ-570+ Manuale di servizio
REV.-A
Problem
The
ribbon feed is
The ribbon is not
abnormal.
fed.
The ribbon feeds
properly only when
the carriage moves
in one direction
(i.e., it fails to feed
when the cam.age
moves in the other
direction).
Paper becomes
Ink stains appear
stained.
on areas where
there is printing.
Printing mntinues
Printing continues
after the paper
past the paper end.
ends or when no
paper is loaded.
Symptom
The ribbon
cartridge is
defective.
Foreign substances
are caught in the
gears.
The planetaty lever
is defective.
The ribbon mask is
not mrrectly
positioned.
The platen gap is
not adjusted.
The paper-end
sensor is defective.
Checkpoint
Cause
Dismount the ribbon
cartridge, rotate its
knob manually, and
check whether the
ribbon feeds
normally.
Check whether the
ribbon driving gear
rotates when the
carriage is moved
Move the carriage
manually, and check
whether the planetary
lever turns in reverse
and engages the
gear.
Check whether the
ribbon mask .S in the
correct position.
Set the gap adjust
lever to the second
position, and check
the gap between the
tip of the printhead
and the platen.
The appropriate
value is 0.46 mm.
Check the paper-end
sensor switch.
5-19
Solution
Replace the
ribbon cartridge.
Remove any
foreign substance.
Replace the .
ribbon-feed
mechanism.
Replace the
mechanism.
Reinstall the
Adjust the gap.
Refer to Section
4.1.2 P/aten Gap
Replace
the
paper-end sensor. ~•••y;n•