Uneven Paper Feed Pitch; An Abnormal Sound - IBM NetVista Kiosk DBCS Hardware Service Manual

Symptom:
The print density is uneven.
Possible cause Checkpoint and
method
Damaged or Visually check the
dented platen platen surface.
surface, existence
of a foreign
matter, or a
defective platen

14. Uneven paper feed pitch.

Symptom:
Paper feed does not perform correctly.
Possible cause Checkpoint and
method
Broken motor lead Remove the
or defective motor connector in the
printer unit that
corresponds to
the board frame
unit CN301, and
measure the
resistance
between the
printer unit
connector pins 1
and 3, and 2 and
4 with a tester.
Abnormal motor Measure the
drive voltage motor phases and
ground voltage
with an
oscilloscope.
Damaged motor Visually check for
gear or foreign damaged motor
matter. gears or foreign
matter.
Excessive load Visually check the
during paper feed paper setting.
15. Abnormal sound
Symptom:
Abnormal sound is heard in the printer unit or presenter unit during a
paper feed.
Possible cause Checkpoint and
method
Evaluation Corrective action
criteria and
standard
— If the platen is damaged or
dented, replace the platen
block.
If any foreign matter exists on
the platen, remove it.
Evaluation Corrective action
criteria and
standard
7.0±0.77
Replace the printer unit.
Replace the printer unit.
Pulse waveform
(Wave height:
approximately
24V)
— If there is any foreign matter on
the gears, remove it. Or,
remove the printer unit.
— Reset the paper correctly.
Evaluation Corrective action
criteria and
standard
The NetVista Kiosk-DBCS Model
19