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Phenomenon
Symptom
Possible cause
Checking procedure
Remedy
~rinted characters too
No ribbon feed
Improper mounting of
Check mounting condition of ribbon
Properly mount ribbon
ight
ribbon cassette
cassette.
cassette.
Ribbon cassette
Rotate ribbon cassette takeup knob in
Replace ribbon
defective
, arrow direction to check knob operation
cassette.
and ribbon takeup condition.
t Foreign matter caught
Manualiy rotate motor pinion in direction
Remove foreign
—
in ribbon drive
toward you to check if gear train moves
matter, etc. and
mechanism or broken
1$moothiy.
replace broken gear.
1 gearcausing action
'
; faiiure
; With ribbon cassette mounted in
~ Repiace ribbon siip
~Troubie in ribbon sii~
I
+
mechanism
improper gap
between printhead
position, manuaiiy rotate motor pinion in
mechanism.
direction toward you to check if ink
ribbon is taken up properiy.
Check gap between printhead and
Adjust gap.
piaten.
I and piaten
Troubie in controi biock ' Check voitage appiied from controi biock
Repair control biock.
as weii as voitage added time.
Bi-directional
printing
Misalignment greater
improper mounting
I Try to shift RP sensor mounting position
Readjust RP sensor.
misaiiqnment
than 3.5 coiumns (17
~position of RF sensor
to left or right to check if bidiredional
dots)
I printing misalignment is corrected.
Misalignment inside of
improper mounting
Try to shift connector PCB SA forward or
Readjust connector
2 dots (misalignment
position of connector
backward to check if bidirectional
PCB SA.
inside of 0.3mm is
PCB SA
printing misalignment is corrected.
within specification)
9-3-3. Paper feed trouble
Phenomenon
Cannot insert paper
Paper feed does not
operate at ali or faiis
to operate sometimes
Paper feed pitch
mproper
Symptom
Possibie cause
Checking procedure
Remedy
I
Paper iead edge is
i Check that paper iead edge is not bent
insert paper properly
i bent or improperly cut
~and cut straight.
I once again.
I Troubie because of
I Check thickness, width, and diameter of
I Use paper of
I non-standard paper
I paper used.
I prescribed
. .
specification.
Troubie because of
Check paper feed route for dust and
Remove paper dust
paper dust or foreign
foreign matter.
and foreign matter.
matter
improper ioading of
Check if guide hoies of paper are
Load paper properiy.
paper on pin wheeis
engaged with pin wheeis properly
(symmetrically and without being
stretched too tight or compressed too
1
ioose).
PF coii does not puii in
Gap between PF coii
Check gap between PF coii and PF
Readjust gap between
i and PF trigger iever is
trigger iever.
PF coii and PF trigger
too wide
iever.
PF coii defective
Check resistance of PF coil.
Replace PF coil.
(Specification: Approx. 30Q)
Connector PCB SA
Check for continuity between soider part
Repiace connector
defective
on connector PCB SA and connector A.
PCB SA.
Troubie in control biock
Check hardware circuit in control biock
Repair controi biock or
and wiring from controi biock.
rectify wiring.
PF coii puiis in
Troubie because of
Check paper feed route and paper
Rectify paper feed
paper jam
ioading condition.
route and ioad paper
correctiy.
Gap between PF coil
Check gap between PF coii and PF
Readjust gap between
and PF trigger iever is
trigger iever.
PF coil and PF trigger
too smali
iever.
Trouble in paper feed
Check if paper feed mechanism has not
Remove foreign
mechanism
seized up because of foreign matter or
matter, repiace broken
broken gear, or if PF siip mechanism is
gear, or repiace PF
generating enough force to feed paper.
slip mechanism.
Paper feed pitch too
Troubie in ciutch
Check ciutch gear BK, drive gear BK,
Replace defective
great
I
mechanism
and ciutch sp~ng for abnormal wear and
pa~s.
-20-
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