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NATURE
OF
TROUBLE
7. Paper feed-
ing is im-
possible.
. Paper feed-
ing does
not occur
at specifi-
ed pitch.
9. Improper
column
advancing.
CONDITION OF
TROUBLE
Characters are
Not printed at
regular line
pitch.
Carriage
A4
does not carry
column,
POSSIBLE CAUSE
4) Paper guide of pla
ten assy
Al7
is
clogged with foreign
matters.
5) Scratch or-wear of
paper feeding gear
train.
1) Use of improper
paper.
2) Platen assy A17 is
mounted impro-
perly.
3} Faulty platen assy
Al?7.
4) Faulty paper feed-
ing drive gear assy
B1.
5) Scratch or wear of
paper feeding gear
train.
6) Improper supply of
paper.
1) Wear of trigger fever
B4.
2) Wear of selecting
ratchet
86.
REPAIR
CLASSI-
FICATION
CHECK POINT
© Check the travelling route of
the paper guide.
@Purt the trigger lever 84 into
sucking state by hand, and
visually check the gear train,
while paper feeding operation
is being performed.
@ Paper feeding ratchet wheel
All,
© Paper feeding drive gear assy
Bt.
® Paper feeding transmission gear
B2
®@ Paper feeding gear.
(inculded in the piaten assy
A117).
@ Check if the specified paper is
used. - Standard: Refer to
1,2-7,
@ Refer to Cause 1) of Nature of
Trouble 3.
@ Check if the paper feeding
rubber is worn out or it is
slippery because of sticking of
foreign matters.
© Check if the inside spring is
broken.
© Refer to Cause 5) of Nature of
Trouble 7.
@ Check if the paper supply is
performed properly.
®@ Check the wear (at the portion
where the lever is engaged with
selecting ratchet
B6).
@ Check the wear.
= 23 =
REMEDY
e@ Remove the foreign matters.
© Replace the faulty parts.
© Replace it with the specified
paper.
@ Roughen the surface of the
paper feeding rubber using
sand paper or replace the
platen assy A17.
@ Replace the paper feeding
drive gear assy
B1.
© Modify the improper paper
supply.
© Reptiace the trigger lever B4.
@ Replace the selecting ratche!
BE.
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