Epson LQ-2170 Service Manual page 140

Troubleshooting
Table 5-8. Repairing the Printer Mechanism
Problem
Paper feed is
abnormal.
Cut-sheet paper
continuous paper
^
is not loaded at all.
Ribbon feed is
abnormal.
The ribbon is not
^
The ribbon feeds
properly only
when the
^
carriage moves
in one direction.
5-18
Symptom Cause
CN12 is not
connected
correctly.
is loaded
correctly, but The release
sensor is
defective.
The ribbon
cartridge is
defective.
fed.
Foreign
substances are
caught in the
gears.
The planetary
gear is defective.
LQ-2170 Service Manual
Checkpoint
Check the Connect the
connector. Refer CN12 correctly.
to page 3-19.
Check the Replace the
operation of the release sensor.
release sensor. Refer to page
Refer to page 3-19.
5-2.
Remove the Replace the
ribbon cartridge. ribbon cartridge.
Then rotate the
ribbon feed roller
manually to
check that the
ribbon cartridge
feeds the ribbon
normally.
Check that the Remove any
ribbon driving foreign
gear rotates substances or
properly when replace the
the carriage is ribbon cartridge.
moved
manually.
Manually move Replace the
the carriage and ribbon cartridge
check that the mechanism.
planetary gear
functions
normally.
Solution
Rev. A