Normal Forward Drive; Neutral - TANDBERG 12 Service Manual

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4.3.4 Normal forward drive
Fis.25.
The supply turnfable
T h e s u p p l y t u r n t a b l e ( 6 5 . 2 ) i s c o m p l e t e l y d i s e n g a g e d
f r o m t h e p u l l e y d i s c ( 6 1 . 2 ) a n d f r e e - r u n n i n g i n t h i s
p o s i t i o n . R e f . f i g . 2 5 .
T h e t r i p b a r ( 5 2 . 1 ) h a s m o v e d , a n d t h e d e l r i n b u t t o n
( 5 9 . 1 9 ) o n t h e c l u t c h l e v e r ( 5 9 . 6 ) i s a t t h e h i g h e s t p o s i -
t i o n , p r e s s i n g d o w n t h e t w o d e l r i n l u g s o n t h e c a r t -
r i d g e ( 6 1 . 1 i ) .
Adiustments
A d i u s t t h e h e i g h t o f t h e c l u t c h l e v g r ( 5 9 . 6 ) b y t h e
s c r e w ( A ) u n t i l t h e c l e a r a n c e b e t w e e n t h e p u l l e y d i s c
( 6 1 . 2 ) a n d t h e f e l t r i n g o n t h e t u r n t a b l e ( 6 5 . 2 ) i s a p p r o x .
0 . 5 - l m m ( . 0 2 " - . O 4 " ) . R e c h e c k a l l o t h e r p o s i t i o n s o f
t h e o p e r a t i n g l e v e r a n d f i n a l l y s e a l t h e a d i u s t m e n t
screw A.
F i 9 . 2 6 .
The take-up turntable
T h e t a k e - u p t u r n t a b l e ( 6 5 . 1 ) h a s a r e d u c e d f r i c t i o n
w i t h t h e p u l l e y d i s c ( 6 1 . . l ) i n t h i s p o s i t i o n . T h e t o r q u e
o f t h e t a k e - u p t u r n t a b l e ( 6 5 . . | ) s h o u l d b e s u f f i c i e n t t o
t a k e - u p t h e t a p e i n r e c o r d o r p l a y b a c k m o d e s . R e f .
f i s . 2 6 .
T h e t r i p b a r ( 5 2 . 1 ) h a s m o v e d , a n d t h e d e l r i n b u t t o n
( 5 9 . 1 9 ) o n t h e u p p e r c l u t c h l e v e r ( 5 9 . 2 ) i s i n t h e m i d d l e
p o s i i i o n , p r e s s i n g d o w n t h e s p r i n g l o a d e d l o w e r c l u t c h
l e v e r ( 5 9 . 8 ) . T h e d e l r i n l u g s o n t h e c a r t r i d g e ( 6 1 . . | l )
a r e r e l e a s e d f r o m a n y t e n s i o n , a n d t h e p u l l e y d i s c
( 6 1 . 1 ) i s p r e s s i n g a g a i n s t t h e t u r n t a b l e ( 6 5 . 1 ) o n l y b y
t h e t e n s i o n o f t h e c o m p r e s s i o n s p r i n g ( 6 1 . 8 ) .
Adiustments
A d i u s t t h e h e i g h t o f t h e u p p e r c l u t c h l e v e r ( 5 9 . 7 ) b y
t h e s c r e w ( B ) u n t i l t h e d e l r i n l u g s o n t h e c a r t r i d g e
( 6 . l . 1 l ) i s i n t h e c e n t e r p o s i t i o n b e t w e e n u p p e r a n d
l o w e r c l u t c h l e v e r s ( 5 9 . 7 , 5 9 . 8 ) .
T h e t o r q u e o f t h e t a k e - u p i u r n t a b l e ( 6 5 . . I ) s h o u l d b e
1 2 - 2 5 9 ( / r - l
o z ) a c t i n g o n a n a r m o f 8 c m 1 3 1 / 2 " ) .
R e c h e c k a l l o t h e r p o s i t i o n s o f t h e o p e r a t i n g l e v e r a n d
f i n a l l y s e a l t h e a d i u s t m e n t s c r e w B .
t
4.3.5 Neutral
The motor power is shut off, and the pulley discs
( 6 1 . 1 , 6 . l . 2 ) a r e n o t r u n n i n g .
Fis.27.
The supply turnlable
T h e s u p p l y t u r n t a b l e ( 6 5 . 2 ) h a s m a x i m u m o b t a i n a b l e
f r i c t i o n w i t h t h e p u l l e y d i s c ( 6 1 . 2 ) i n t h i s p o s i t i o n . R e f .
c h a p t e r 4 . 3 . 2 , I a s t r e w i n d .
Fis. 28.
The take-up turnlable
T h e t a k e - u p t u r n t a b l e ( 6 5 . ' l ) h a s m a x i m u m o b t a i n a b l e
f r i c t i o n w i t h t h e p u l l e y d i s c ( 6 I . l ) i n t h i s p o s i t i o n . R e f .
c h a p t e r 4 . 3 . 3 , f a s t w i n d .
2 l
1 7