The Operating Lever; The Motor Switch; Adjustments; T H E O P E R O L I N G L E V E R - TANDBERG 12 Service Manual

4.I THE OPERATING LEVER
T h e o p e r a t i n g l e v e r ( 5 4 . 1 ) h a s f i v e p o s i t i o n s a n d i s
located at fhe right front corner of the tape recorder:
N o r m a l f o r w a r d d r i v e , f a s t f o r w a r d d r i v e , f a s t r e w i n d ,
f r e e , a n d n e u t r a l .
T h e o p e r a t i n g l e v e r a c t i v a t e s t h e f o l l o w i n g p a r t s :
The motor switch (33.2): disconnects the power to the
m o t o r ( 1 4 . 1 ) i n n e u t r a l o r
free position of the operating
lever, and activates the elec-
t r o n i c b e a m i n d i c a t o r i n n o r -
m a l f o r w a r d d r i v e , w h e n t h e
fape recorder is set to record
m o d e .
)
;
The eccentric segment
(59.17)l
g u i d e s t h e p r e s s u r e w h e e l
a s s e m b l y ( 5 . l . 3 ) a n d t h e l i f t -
i n g a r m ( 5 9 . i 8 ) .
a c t i v a f e s t h e c l u t c h e s u n d e r
b o t h t u r n t a b l e s ( 6 5 . 1 , 6 5 . 2 ) .
)
T h e t r i p b a r ( 5 2 . . I ) :
4.1.1 The motor switch
The microswitch (33.2) is located on the bracket (54.9)
f o r t h e o p e r a t i n g l e v e r , r e f . f i g . 7 . T h e s w i t c h i s c o n -
nected in series with lhe motor current and is activated
b y t h e o p e r a t i n g l e v e r ( 5 4 . i ) t o s h u t o f f t h e m o t o r i n
n e u t r a l o r f r e e p o s i t i o n . T h e m o t o r s w i t c h a l s o d i s -
iF connects the power to the electronic beam indicafors
i n n e u i r a l o r f r e e p o s i t i o n w h e n t h e f u n c t i o n s e l e c t o r
switches are set to record.
Adlustments
T h e o p e r a t i n g p o i n t o f t h e m i c r o s w i t c h ( 3 3 . 2 ) s h o u l d
b e s e t a c c o r d i n g t o f i 9 . 8 . T h e m o t o r s h o u l d s t a r t w h e n
t h e o p e r a t i n g l e v e r ( 5 4 . . | ) i s m o v e d f r o m n e u t r a l t o
either normal forward, fasl wind or fast rewind posi-
t i o n . U n s c r e w t h e t h r e e s c r e w s A , B , a n d C r e f . f i g . 7 .
A d i u s t l h e h o r i z o n i a l p o s i t i o n o f t h e d e l r i n b r a c k e t
(33.5) and ihe vertical position of the microswitch
( 3 3 . 2 ) o b t a i n i n g p r o p e r p o s i t i o n s f o r c o r r e c t o p e r a t i n g
p o i n l .
F i g . 7 , T h e o p e r o l i n g l e v e r .
M I C R O S W I T C H
O P E R A T I N G P O I N T S
77^
/ z " \
7 7 -
(. 3'.)
---l>
O P E R A T I N G L E V E R
I H L L
Fig. 8. Adiusimeni
of the operoting points for the microswitch.