Specifications

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REV.-A
5.5 REPAIR
OF THE PRINTER
For detailed procedures for replacing or adjusting parts, refer to Chapter 3, Dimssemb/yandAswmb/y, and Chapter
4, Ao@hr?ent. If a problem or symptom recurs following an attempted repair, refer to Table 5-5 to try to find other
potential causes.
Table -. ReDair of the Printer Mechanism
.
Problem
Symptom
Cauae
Checkpoint
Solution
The carriage
The carriage motor
Foreign substances
Manually move the
Remove any
motor fails to
completely fails to
are lodged in the
timing belt to see if
foreign
operate.
activate at power
gears or elsewhere this causes the motor
substances.
on.
in the mechanism.
to rotate.
The carriage motor Measure the coil
Replace the
is defective. resistance of the
carriage motor.
motor. The
resistance should be
about 19.5 ohms.
The carriage does
The carriage motor
The belt pulley is Check for broken or
Replace the belt
not operate at
rotates, but the
defective. worn pulley.
pulley.
power on (after
carriage does not
the carriage has
mwe.
The timing belt is Check that the timing
Reinsett the
been manually
defective. belt is correctly
timing bett.
centered prior to
inserted into the
power on.)
bottom of the
carriage.
Check for a broken
Replace the
timing belt.
timing belt.
The carriage
Carriage movement
Check whether the
Clean and
moves left slightly,
is not smooth.
carriage moves
lubricate.
then stops.
smoothly when
moved manually.
The carriage
The home position
Use a multimeter to Replace the home
moves to the left or
sensor is defective. check the home
position sensor.
right end, then
position sensor.
stops.
Self-test printing
The carriage
The printhead FFC Check the common Replace the FFC.
does not execute.
moves, but no
common wires are
wires for the
printing is
disconnected.
printhead FFC.
performed.
5-17