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3-5-2.
Replacement
of
Stepping Motor
A s s ' y
(A)
Tools
(1)
Cross
p o i n t screwdriver, M 3
(2)
A
pair o f tweezers
(3) Alcohol and gauze
( 4 ) Locking p a i n t
(5) SKA
or
u s e r ' s system
(6) Required equipment
for
r a c h r e f e r r i n g i t e m
(B) Replacement procedure
(1) Disconnect t h e s t e p p i n g motor connector (56).
( 2 )
Remove t h e s t e p p i n g motor c a b l e from t h e c a b l e hooks of t h e frame
t o make t h e c a b l e be f r e e .
(3) Remove t h e s t e e l belt (Table 402C, N o . 2 3 ~ ) and t h e b e l t s p r i n g (Table
402C, No.22d) according t o item 3-5-1
( 3 ) through
( 8 ) .
( 4 )
Remove t w o f i x i n g
screws
(Fig.405, S9) of t h e s t e p p i n g motor
A s s ' y
(Fig.405, No.27) and remove t h e s t e p p i n g motor with t h e s t e e l belt.
(5) Remove a screw (Fig.405, S1) on t h e c a p s t a n of t h e stepping motor and
remove t h e s t e e l
belt
and t h e p l a t e washer (Fig.405, No.26).
(6) Confirm t h a t t h e r e i s no i n f e r i o r nor d e f e c t i v e p o i n t f o r t h e s t e e l
belt
and
belt
spring.
Then c a r e f u l l y c l e a n t h e s u r f a c e of t h e s t e e l
belt, belt s p r i n g and capstan with a l c o h o l and gauze.
If an i n f e r i o r o r d e f e c t i v e p o i n t
i s found, r e p l a c e t h e s t e e l
belt
or
t h e belt s p r i n g with a new one.
(7)
Fix the
s t e e l
belt
temporarily t o t h e c a p s t a n
of
a
new
s t e p p i n g
motor
-
3507
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