Service manual

Tmub/eshooting
DEK50QO+ Service Manual
Table 5-7. Printer Mechanism Repair (continued)
Symptom
Cause
Checkpoint Solution
The RF motor does
The parallelism value
Check whether the
Perform the
not operate.
is incorred. carriage moves
parallelism
smoothly when
adjustment, as
moved manually.
described in
(Check that foreign
Section 4.1.5.
objects are not
lodged in the printer
mechanism.)
The RF motor does
The RF motor is
Check the coil
Replace the RF motor.
not operate.
defective.
resistance of the RF
motor. (It should be
about 150 ohms.)
The PG motor does
The backlash value is
Check whether the
Loosen the 2 screws
not operate.
incorrect. carriage guide shaft
securing the PG
rotates smoothly
motor to the left side
when rotated
frame. Then adjust
manually.
the backlash between
the PG motor pinion
gear and the carriage
guide shaft gear, as
described in
Chapter 4,
A@strnenfs.
The PG sensor is Check the output
Replace the PG
defective. signal of the PG
sensor.
sensor. (Refer to
Table 5-6.)
The encoder plate is
Check whether the Replace the PG motor
defective.
encoder plate is
or clean the encoder
broken or stained.
plate.
The PG home sensor Check the continuity Replace the PG home
is defective. of the sensor.
sensor (micro switch
(Check the status of
type).
the two micru
switches.)
The PG motor is
Check the coil
defective.
Replace the PG motor.
resistance of the PG
motor. (It should be
about 250 ohms.)
Printing continues
The front, rear, or top
Check the PE sensor.
Replace the PE
rmst the end of the
PE sensor is
sensor.
paper.
defective.
iNhen paper jams, the
The
paper jam
Check the paper jam
Replace the paper
~rinter does not beep.
sensor is defective.
sensor.
jam sensor.
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,
. . .-
k “’
5-26
Rev. A