Epson C117001-N - DFX 5000+ B/W Dot-matrix Printer, Руководство по обслуживанию

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5.5 PRINTER MECHANISM REPAIR
The table below describes how to isolate problems with the printer mechanism. To or
adjust printer mechanism parts, refer to Chapter 3,
and Assembly, and Chapter
If a
symptom
recurs following a repair attempt, look for other possible causes and
solutions in the
table b&low.
Table 5-7. Printer Mechanism Repair
Symptom
Cause Checkpoint
The CR motor does The transport locking Verify that the
Remove bracket.
not operate. bracket (used to transport
(Refer to Section 3.1.)
the carriage in place bracket has been
when the printer is removed.
moved) has not been
removed.
Foreign objects are move the
Remove any foreign
in the gears or
carriage to see if the objects.
elsewhere (e.g., the motor rotates.
paper dust on the
carriage encoder
in the
mechanism.
The CR motor is Measure the coil Replace the CR motor.
defective. resistance of the CR
motor. It should be
approximately 6.2
ohms.
The carriage timing check the
Perform the carriage
belt is defective. carriage timing timing belt tension
tension. adjustment, as
described in Section
4.1.2.
The carriage guide
Check whether the Perform the carriage
shaft parallelism carriage moves guide shaft
value is incorrect. when adjustment, as
moved described in Section
(Check that foreign 4.1.5.
objects are not
lodged in the printer
mechanism.)
The CR sensor is
Check the waveform the CR
defective. for the sensor.
encoder signal.
(Refer to Table 5-6.)
The carriage encoder Check the encoder
Replace or clean the
belt is damaged or belt the
carnage encoder belt.
covered with dust. carriage timing belt).
The carriage moves,
The Check the continuity
Replace the
but no printing is
wires are of the common wires
performed. broken.
for the printhead
5-24
Rev.