Epson LX-HOO Technical Manual page 118

Problem
Paper does not
feed correctly.
. Printing is
The paper feed
quantity is not
uniform.
Paper does not
The paper is
feed correctly.
fed aslant.
Ribbon feed is The ribbon
da fective. does not feed.
The ribbon is
fed only when
the carriage
moves to the
right
left).
Table 5-7. Printer Mechanism Unit Repair (cent'd)
Symptom
The paper end
Sheet load-
ing mecha- sensor is
defective.
nism does
not operate.
The paper release
performed,
lever is not in the
but the paper
right position.
is not fed.
Foreign substances
are caught in the
paper path.
The paper feed
motor does not
drive the gear
correctly.
The paper feed
motor is defective.
The backlash be-
feed motor and
the paper feed re-
duction gear is not
correct.
Phases of the right
and left sprocket
assembly do not
match.
The ribbon car-
Foreign substances
are caught in the
gears, or the gear
is worn.
The planetary le-
ver in the car-
defective.
t h e
(or to
Cause
Verify that the switch
clicks when the paper
end sensor lever is
approached.
Verify that the paper re-
lease lever is in the right
position.
Perform a visual check of
the paper path.
Verify that no foreign
substance is lodged be-
the gears are not broken
or worn.
motor.
. Resistance value: 58Q
Check the backlash.
Verify that the marks on
the right and left sprock-
et assembly are at the
same position.
Verify that the ribbon is
fed when the ribbon car-
the knob is rotated manu-
ally in the direction of
the arrow.
Verify that the ribbon
drive gear rotates when
the carriage is moved
manually to right and
left.
Verify that the planetary
engages with the gear
when the carriage is
moved manually to the
right and left.
5-17
Checkpoint
Replace the pa-
per end sensor.
Place the lever in
the right
position.
Remove any for-
eign substances.
. Remove the
. Replace the
Replace the pa-
per feed motor.
Replace the pa-
per feed reduc-
tion gear.
Refer to Section
4.2.3.9 "Tractor
Unit
Disassembly".
Replace the rib-
bon cartridge.
. Lubricate.
Replace the belt
driven pulley
assembly.
Solution
foreign
substance.
defective gear.
Remove any
foreign
substances.
Replace the
defective gear.