Horizontal And Vertical Alignments Of The Turntables; Clutch Alignments - TANDBERG 12 Service Manual

4.2.4 Horizontal and vertical alignmenls
of the turntables
U s e t h e s p e c i a l t o o l s I , 2 , a n d 3 f o r t h e s e a l i g n m e n t s .
R e f . f i 9 . 6 5 .
Horizontal alignmenls
The horizontal position of the two lurnlables (65..|,
6 5 . 2 ) p a r a l l e l t o t h e l o w e r m o u n t i n g p l a t e ( 7 1 . . l ) i s
checked by placing the special tool No. I across both
t u r n t a b l e s a s s h o w n i n f i g . l B . T h e r e s h o u l d b e n o
s p a c i n g b e t w e e n t h e r u l e r ( t o o l N o . i ) a n d t h e t u r n -
t a b l e s .
Necessary adiustments are made by bending the turn-
t a b l e h o u s i n g i n c o r r e c t p o s i t i o n . U s e t h e s p e c i a l t o o l
N o . 3 , a s s h o w n i n f i g . 1 9 .
T h e h o r i z o n f a l p o s i t i o n o f b o t h t u r n t a b l e s ( 6 5 . 1 , 6 5 . 2 ) ,
p a r a l l e l t o a l i n e p e r p e n d i c u l a r t o t h e f r o n t e d g e o f
t h e u p p e r m o u n t i n g p l a t e ( 7 1 . 2 ) i s c h e c k e d b y u s i n g
t h e s p e c i a l t o o l N o . 2 .
T h e e d g e o f t h e s p e c i a l t o o l N o . 2 s h o u l d r u n e x a c t l y
i n t o t h e t a p e g r o o v e i n t h e g u i d e ( 7 9 . 1 3 , 7 9 . 1 4 ) , w h e n
t h e o p e r a t i n g l e v e r ( 5 4 . . l ) i s i n t h e n e u t r a l p o s i t i o n .
R e f . f i 9 . 2 0 .
N e c e s s a r y a d i u s t m e n t s a r e m a d e b y b e n d i n g t h e t u r n -
t a b l e h o u s i n g ( 6 5 . 3 ) i n c o r r e c t p o s i t i o n . U s e s p e c i a l
t o o l N o . 3 , a s s h o w n i n f i g . 1 9 .
Vertical alignments
T h e h o r i z o n t a l p o s i t i o n o f t h e t u r n t a b l e s m u s t b e s e t
b e f o r e l h e v e r t i c a l a l i g n m e n t i s m a d e .
T h e v e r t i c a l p o s i t i o n o f t h e t u r n t a b l e s i s c h e c k e d w i t h
the tape threaded on the recorder. The tape should not
touch the edges of the plastic reels in any mode of
o p e r a l i o n .
T h e t u r n t a b l e s a r e r a i s e d o r l o w e r e d , i f n e c e s s a r y , b y
adding or subtracting turbax washers (M306-7) be-
t w e e n t h e f l a n g e f o r t h e t u r n t a b l e h o u s i n g ( 7 2 . 1 , 7 2 . 2 )
a n d t h e t u r n t a b l e h o u s i n g ( 6 5 . 3 ) . R e f . f i g . 1 3 a n d 1 6 .
A f i n a l c h e c k o f t h e h o r i z o n t a l p o s i t i o n o f t h e t u r n -
t a b l e s s h o u l d b e m a d e .
G
t
F i g . 1 9 . A l i g n m e n t o f t h e h o r i z o n t o l p o s i t i o n o f t h e t u r n t o b l e s
w i t h f o o l N o . 3 .
F i g . 2 0 . C o n t r o l o f t h e h o r i z o n t o l p o s i t i o n o f l h e t u r n t q b l e s
w i l h t o o l N o . 2 .
F i g . 1 8 . C o n t r o l o f t h e h o r i z o n t o l p o s i t i o n o f t h e t u r n t o b l e s w i l h i o o l N o . l .
S P E C I A L T O O L N O , 2
4.3
CLUTCH ATIGNMENTS
4.3.1 General
T h e m o t o r w i l l a l w a y s r u n a n d d r i v e b o t h p u l l e y d i s c s
( 6 1 . . | , 6 1 . 2 ) w h e n t h e o p e r a t i n g l e v e r ( 5 4 . 1 ) i s s e t f o
e i t h e r n o r m a l f o r w a r d d r i v e , f a s t w i n d , o r f a s t r e w i n d
p o s i t i o n . T h e t w o p u l l e y d i s c s w i l l r u n i n t h e o p p o s i t e
directions caused by the cross threading of the rubber
d r i v e b e l t ( 6 2 . 2 ) . R e f . f i g . 6 .
T h e t o r q u e o f t h e t u r n t a b l e s ( 6 5 . 1 , 6 5 . 2 ) i s o b t a i n e d
b y t h e f r i c f i o n b e t w e e n t h e p u l l e y d i s c s ( 6 i . 1 , 6 1 . 2 )
a n d t h e f e l t r i n g s g l u e d t o t h e t u r n t a b l e s ( 6 5 . . I , 6 5 . 2 ) .
T h e f r i c t i o n b e t w e e n t h e p u l l e y d i s c s a n d t h e t u r n -
tables is determined by the position of fhe cluiches
mounted under each pulley disc. The clutches are ope-
rated by the trip bar (52..l), which is connecfed to the
o p e r a t i n g l e v e r ( 5 4 . I ) .