Printer Mechanism Repair - Epson LX-810 Technical Manual

5.3.2

Printer Mechanism Repair

For detailed procedures for replacing
Reassembly") and 4.4 ("Adjustment").
If a problem or system recurs following an attempted repair, refer back to the Tables above to try to
find other potential causes.
Problem
The carriage The carriage
motor fails to motor completely
fails to activate at
operate.
power ON.
The carriage does The carriage
not operate motor rotates, but
normally at power the carriage does
ON (when the not move.
carriage has been
manually centered
prior to power
ON.)
The carriage
moves leftwards a
little, then stops.
The carriage
moves to the left
end, then stops.
The carriage
Self-test printing
does not execute. moves, but no
printing is
performed.
Printing stops
before the page
end.
or adjusting parts, refer to Sections 4.3 ("Disassembly and
Table 5-5. Printer Mechanism Repair
Symptom Cause
Foreign
substances are
lodged in the
gears or
in the mechanism.
The carriage
motor is defective.
The belt pulley is
defective.
The timing belt is
defective.
The carriage
movement is not
smooth.
The home
position sensor is
defective.
The common
wires of the
disconnected.
The paper guide
plate is not
correctly
positioned.
Checkpoint
Manually move the timing
belt to see if this causes
the motor to rotate.
Measure the coil resistance
The resis-
of the motor.
ohms.
Check for broken or worn
pulley.
Check that the timing belt
is correctly inserted into
the bottom of the carriage.
Check for a broken timing
belt.
Check whether the carriage
moves smoothly when
moved manually.
Use a tester to check the
the home position sensor.
Check the connector for
the common wires of the
Check whether the paper
guide plate is mounted in
the right position.
5-18
Solution
Remove any
foreign
substances.
Replace the
carriage motor.
Replace the belt
pulley.
Reinsert the
timing belt.
Replace the
timing belt.
Clean and
lubricate.
Replace the home
position sensor.
Replace the FFC.
. .
Reset the paper
guide plate.