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REPAIR
NATURE
OF|
CONDITION OF
POSSIBLE CAUSE
CLASSI-
CHECK POINT
REMEDY
TROUBLE
TROUBLE
FICATION
3. Printed
Upper and
characters
lower, and right
are chipp-
and left portions
ed.
of the printed
characters are
chipped.
4. Omission
Omission of
of charac-
| character
ter.
occurs in all
columns.
5. Erroneous | Prints a charac-
printing
ter different
from that to be
printed.
>
1) Platen assy A17 is
mounted improperly.
2) Wear oft print cam
At12, hammer
transfer lever assy
AS and hammer
AG.
3) Wear of positioning
plate Al and stick-
ing of foreign matters.
4) Foreign matters
sticking to the print
wheel assy A7 and
hammer A6.
5) Print wheel assy A7
is too weak, and
characters are worm
out.
1) Trigger lever spring
BS is mounted
improperty.
2) Setecting ratchet
spring A18 is too
weak or disengaged.
3) Hammer spring of
the hammer
transfer lever assy
A5 is too weak.
4) Faulty operation of
print wheel assy
A?7.
5) improper adjustment
of detection wheel
Ci.
6) Bending of the
brush of detector
assy C2.
© Check if the platen assy A17
is
perly set to the frame.
@ Visually check the stroke of
hammer A6 by putting the
trigger lever B4 into sucking
state by hand.
© Check the wear of the tooth of
positioning plate Al for
advancing column as weil as
the sticking of foreign matters.
@ Visually check the hammer tip
and the front and back surfaces
of print wheel.
@ Visually check the frame of
print wheel and the characters
of the same.
© Visually check from the bottom
of the printer.
© Visually check from the top of
the printer.
@ Return the print wheel assy
A7 and carriage A4 to the
waiting position. Then, slide
the carriage by hand after the
Positioning plate A1 is released,
and check if the print wheel
slides smoothly.
@ Check.
@ Check the bending of the brush.
~ 21 _
@ Modify the mounting position,
@ Replace the worm
parts.
@ Replace the positioning plate
Al,
@ Remove the foreign matters.
© Remove the foreign matters.
© Replace the print wheel assy
A7.
@ Modify the mounting position,
© Replace the selecting ratchet
spring A18.
© Replace the hammer transfer
lever assy A5.
@ Replace the print wheel assy
A7.
@ Adjust the detection wheel
C1.
© Replace the detector assy
C2.
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