Specifications

REV.-B
5.4 REPAIR OF THE PRINTER MECHANISM
For detailed procedures for replacing or adjusting parts, refer to Chapter 3, Disassembly and Assembly,
and Chapter 4, Adjustment. If a problem or symptom recurs following an attempted repair, refer to Table
5-5 to try to find other potential causes.
Problem
The MOTOR, CR
fails to operate.
Table 5-5. Repair of the PRINTER MECHANISM
Symptom
Cause
Checkpoint
Solution
The MOTOR, CR
Foreign substances
Manually move the
Remove any for-
completely fails to
are lodged in the TIMING BELT to eign substances.
activate at power
gears or elsewhere see if this causes
on.
in the mechanism. the motor to rotate.
The MOTOR, CR is
Measure the coil re-
Replace the MO-
defective. sistance of the mo- TOR, CR.
tor. The resistance
should be about
19.5 ohms.
The carriage does The MOTOR, CR
The BELT PULLEY Check for broken Replace the BELT
not operate nor- rotates, but the is defective. or worn pulley. PULLEY.
mally at power on
carriage does not
(after the carriage
The TIMING BELT Check that the TIM- Reinsert the TIM-
move.
is defective.
ING BELT is cor- ING BELT.
has been manually
centered prior to
rectly inserted into
power on).
the bottom of the
carriage.
Check for a broken Replace the timing
timing belt. belt.
The carriage Carriage move- Check whether the Clean and
moves left slightly, ment is not
carriage moves lubricate.
then stops.
smooth.
smoothly when Replace the MO-
moved manually. TOR, CR.
The carriage The DETECTOR
Use a multimeter to
Replace the DE-
moves to the left ASSY., HP is check the
TECTOR ASSY.,
or right end, then defective. DETECTOR ASSY.,
HP.
stops. HP.
Self-test printing
The carriage The printhead FFC
Check the common Replace the FFC
does not execute.
moves, but no (CABLE, HEAD,
wires for the print- (CABLE, HEAD,
printing is
FRONT (,REAR) )
head FFC (CABLE, FRONT (,REAR) ).
performed. common wires are HEAD, FRONT
disconnected.
(.REAR) 1.
I
5-17