Epson 2070 Service Manual - Page 141

Symptom, Cause, Checkpoint, Solution, LQ-2070 Service Manual, Troubleshooting, CN12 or CN16

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LQ-2070 Service Manual Troubleshooting Table 5-8. Repairing the Printer Mechanism Problem Abnoraml paper feed. ^ Ribbon feed is abnormal. ^ ^ Symptom Cause Checkpoint Solution Cut-sheet paper is loaded correctly, but continuous paper is not loaded at all. CN12 or CN16 is not connected correctly. The release sensor is defective. Check the connector. Refer to page 3-19. Check the operation of the release sensor. Refer to page 5-2. Connect the CN12 or CN16 correctly. Replace the release sensor. The ribbon cartridge is defective. The ribbon is not fed. Foreign substances are caught in the gears of the RD assembly. Remove the ribbon cartridge. Then rotate the ribbon feed roller manually to check that the ribbon cartridge feeds the ribbon normally. Replace the ribbon cartridge. Check that the ribbon driving gear rotates properly when the carriage is moved manually. Remove any foreign substances or replace the RD assembly. The ribbon feeds properly only when the carriage moves in one direction. The planetary gear is defective. Manually move the carriage and check that the planetary gear functions normally. Replace the RD assembly. Rev.A 5-19

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Table 5-8. Repairing the Printer Mechanism
Problem
Symptom
Cause
Checkpoint
Solution
Abnoraml paper
feed.
Cut-sheet paper
is loaded
correctly, but
continuous paper
is not loaded at all.
CN12 or CN16 is
not connected
correctly.
Check the
connector. Refer
to page 3-19.
Connect the
CN12 or CN16
correctly.
^
The release
sensor is
defective.
Check the
operation of the
release sensor.
Refer to page
5-2.
Replace the
release sensor.
Ribbon feed is
abnormal.
The ribbon is not
fed.
The ribbon
cartridge is
defective.
Remove the
ribbon cartridge.
Then rotate the
ribbon feed roller
manually to
check that the
ribbon cartridge
feeds the ribbon
normally.
Replace the
ribbon cartridge.
^
Foreign
substances are
caught in the
gears of the RD
assembly.
Check that the
ribbon driving
gear rotates
properly when
the carriage is
moved
manually.
Remove any
foreign
substances or
replace the RD
assembly.
^
The ribbon feeds
properly only
when the
carriage moves
in one direction.
The planetary
gear is defective.
Manually move
the carriage and
check that the
planetary gear
functions
normally.
Replace the RD
assembly.
LQ-2070 Service Manual
Troubleshooting
Rev.A
5-19