Modifications From Four-Track To Two-Track Models; Parts List; Mechanical Parts - TANDBERG 12 Service Manual

E r a s e h e a d
R e c . / p l a y b . h e a d
O s c . t r a n s f o r m e r
c t t 7
w t z v
\ - t r +
c t 5
R 1 4 8
R 1 4 9
R t 5 0
4 t H
40H
T3
300 pF
50-250 pF
J J U O N M S
I 3 0 o h m s
i 3 0 o h m s
43H
3 9 H
T I
1 0 0 0 p F
I 5 0 - 7 5 0 p F
1 2 p F
1 2 p F
i 0 0 o h m s
. l 0 0
o h m s
1 0 0 o h m s
5.9 MODIFICATIONS FROM FOUR.TRACK TO
TWO.TRACK MODETS
T h e f o l l o w i n g c h a n g e s h a v e t o b e i n t r o d u c e d w h e n
the tape recorders are modified from four-track to
two-track.
P A R T
i moorLs r z-a
i MoDELS r 2-2
R e f . p a r a 4 . 4 i n s t r u c t i o n f o r c h a n g i n g t h e m o t o r p u l -
l e y . T h e t y p e n u m b e r f o r t h e 5 0 c / s m o t o r p u l l e y i s
6 2 . 1 - 5 7 1 6 - 1 2 C a n d f o r t h e 6 0 c / s v e r s i o n i t i s
6 2 . 2 - 5 7 1 4 - 1 2 C .
T h e m o t o r c a p a c i t o r c o n s i s t s o f t w o c a p a c i t o r s l . l u F
a n d . l u F i n t h e s a m e c a n . W h e n m o d i f y i n g i h e t a p e
recorder from 60 c/s to 50 c/s, the capacitor is in-
c r e a s e d f r o m l . l u F i o 1 . 2 u F b y c o n n e c l i n g a w i r e
b e t w e e n t h e s o l i d e r i n g t a g s o n t h e c a n a c c o r d i n g t o
s p e c i f i c a t i o n s p r i n t e d o n t h e c a p a c i f o r . T h e o p p o s i t e
m o d i f i c a t i o n i s o b t a i n e d b y c u t t i n g t h i s s a m e w i r e t o
decrease the capacitance.
The transformer is connected to either 220 volts or
l l 0 v o l t s a c c o r d i n g t o t h e f o l l o w i n g s c h e m a t i c o n
t r o . 5 0 .
l f 0 V 6 0 y ' t
Fig. 56. Tronsformer connections lor 220 Y 50 c/s qnd I I 0 V 60 c/s.
1r
5.lO MODIFICATION FROM 220 VOTTS 50 c/s TO
. I l 0 V O I T S 6 0 c / s
W h e n c h a n g i n g f r o m 5 0 t o 6 0 c / s o p e r a t i o n , t h e d i a -
meter of the molor pulley is reduced to compensate
f o r t h e i n c r e a s e d m a i n s f r e q u e n c y . T h e m o t o r c a p a -
c i t o r C l i s a l s o c h a n g e d f r o m
. l . 2
u F i o
. l . 1
u F .
T h e t r a n s f o r m e r T R 2 8 6 i s a t a p p e d t r a n s f o r m e r w h i c h
c a n b e c o n n e c t e d f o r e i l h e r 2 2 0 v o l t s o r l l 0 v o l t s
50/60 c/s.
220v 50 y 't
6.0 Parts list
T o i m p r o v e t h e e q u i p m e n t , m i n o r c h a n g e s a n d m o d i -
3 )
f i c a t i o n s h a v e b e e n i n t r o d u c e d o n t h e m o d e l s . T h e
c o m p l e l e r e f e r e n c e n u m b e r o f t h e p a r t a n d s e r i a l
number of the tape recorder must therefore be spe-
c i f i e d w h e r e s p a r e p a r t s a r e o r d e r e d , i . e . :
1 8 . 1 9 - 1 -
1 2 C - * - R e c t i f i e r c i r c u i t b o a r d w i t h
l 2 3 4 c o m p o n e n t s .
l ) T h e t h r e e o r f o u r f i r s t n u m b e r s s t a t e t h e p a r t a n d
a r e r e f e r r e d t o i n a l l f i g u r e s .
2 ) T h i s d i g i t i s p r e s e n t e d o n l y w h e n m o d i f i c a t i o n i s
6.0.1 Mechanical parts
i n t r o d u c e d t o t h e p a r t . I n s o m e c a s e s t h i s n u m b e r
also refers to subcontractors specifications.
The type number state the type of tape recorder
f o r w h i c h t h e p a r t i s u s e d .
1 2 C - T h e p a r t i s i n t e r c h a n g e a b l e a n d u s e d f o r
a l l m o d e l s .
1 2 2 - P a r i s o n l y f o r m o d e l l 2 - 2 .
1 2 4 - P a r t s o n l y f o r m o d e l l 2 - 4 .
1221 - Paris only for model 12-21 .
l 2 4 l - P a r t s o n l y f o r m o d e l 1 2 - 4 1 .
1222 - Parts only for model 12-22.
1 2 2 4 - P a r t s o n l y f o r m o d e l 1 2 - 2 4 .
M o d i f i e d p a r t s i n d i c a t e d w i t h * m a y b e u s e d a s
r e p l a c e m e n t f o r p a r t s o f e a r l i e r d e s i g n .
4)
Ref. No.
Description
Fig. ref.
11.1-286-t2C
1 1 . 2 - t 2 C
r r.3-l 2c
r 3 . 1 - l 2 2
13.1-124
l 4 . l - l 2 c
l 4 . l - l - l 2 c
14.2-12C
14.3-t2C
I 4.3-l -r 2C
11.4-t2C
14.5-l -l 2C
P o w e r r r q n s f o r m e r 1 1 O - 2 2 O Y , 5 O / 6 O c / s T 2
M o i n s t e r m i n o l s t r i p
Brockel for tronsformer
Oscillotor lronsformer Tl (2-trock)
Oscillotor lronsformer T3 (4-rrock)
Motor l65V 50/60cls Engel
Moror 165 V 50/60 c/s Engel
Mounling plole for motor, complete
Bridge for mouniing of motor
Bridge for mounting of motor
Shock obsorber for molor
P l o t e s h i m 2 , 3 m m
3 1 , 5 3
3 t , 5 3
53
53
53
53
Introduced from ser. No 746951
Removed from ser. No. 745951
Inlroduced from ser. No 746951
Inlroduced from ser. No 745951