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TROUBLESHOOTING
Rev. B
5-2
3
5.2.3 Printer Mechanism Repair
The table below describes how to isolate problems with the printer mechanism. To replace or adjust printer
mechanism parts, refer to Chapter 3,
Disassembly and Assembly
, and Chapter 4,
Adjustments
. If a
symptom recurs following a repair attempt, look for other possible causes and solutions in the table below.
Table 5-7. Printer Mechanism Repair 1/4
Symptom Cause Checkpoint Solution
The CR motor
does not operate.
The transport locking
bracket (used to hold
the carriage in place
when the printer is
moved) has not been
removed.
Verify that the transport locking bracket
has been removed.
Remove bracket.
(Refer to Section
3.1.)
Foreign objects are
lodged in the gears or
elsewhere (e.g. paper
dust on the carriage
encoder belt) in the
mechanism.
Manually move the carriage to see if
the motor rotates.
Remove any foreign
objects.
The CR motor is
defective.
Measure the coil resistance of the CR
motor. It should be approximately 1.66
ohms + 10 %.
Replace the CR
motor.
The carriage timing
belt is defective.
Manually check the carriage timing belt
tension.
Perform the carriage
timing belt tension
adjustment, as
described in Section
4.1.2.
The carriage guide
shaft parallelism
value is incorrect.
Check whether the carriage moves
smoothly when moved manually.
(Check that foreign objects are not
lodged in the printer mechanism.),
Perform the carriage
guide shaft
parallelism
adjustment, as
described in Section
4.1.5.
The CR encoder
sensor is defective.
Check the waveform for the carriage
encoder signal. (Refer to Table 5-6.),
Replace the CR
encoder sensor.
The carriage encoder
belt is damaged or
covered with dust.
Check the encoder belt (below the
carriage timing belt).
Replace or clean the
carriage encoder
belt.
The carriage
moves, but no
printing is
performed.
The printhead FPC
common wires are
broken.
Check the continuity of the common
wires for the printhead FPC.
Replace the FPC.