Play Operation - Pioneer SK-700 Service Manual

o Auto Stop Mechanism
G e o r ( C )
) /
F A S S w i t c h
-
Motor
F i g . 6
'l
. During PLAY, FF, REW, and REC operations, the rota-
tion of the reel unit causes pin (A) to press against arm
( C ) , a n d t h e f o r c e o f t h e s p r i n g p u s h e s a r m ( D ) i n t h e
3 .
d i r e c t i o n o f t h e a r r o w . P i n ( B ) o n a r m ( D ) m o v e s a l o n g
t h e o u t e r p e r i p h e r y o f g e a r ( C ) .
2 . W h e n t h e r e e l u n i t s t o p s , a r m ( D ) i s f r e e d a n d p i n ( B ) i s
P i n ( B )
l.
F i g . 7
drawn toward the center of gear (C). The cam also brings
a r m ( D ) i n w a r d , t u r n i n g t h e F A S s w i t c h O N .
After the FAS switch has been turned on two (or more)
t i m e s . t h e S T O P s o l e n o i d t u r n s O N a n d a l l o p e r a t i o n s
are thus stopped.
, \
A r
P i n ( A
o
1 .
PLAY Operation
Pressing the PLAY button starts the motor rotating, and
a t t h e s a m e t i m e t u r n s t h e P L A Y s o l e n o i d O N . T h e
PLAY lever is pressed by arm (B), and locked by the
l o c k p l a t e ( s e e F i g . 4 ) .
The PLAY lever, via arm (E) moves the head mount for-
w a r d . l t a l s o p r e s s e s a g a i n s t a r m ( F ) , w h i c h c a u s e s t h e
pinch-roller to contact the capstan shaft. Arm (F) is
c o u p l e d t o t h e T P u n i t t h r u a r m ( G ) , a n d t h e a b o v e
action causes the TP unit to contact the reel unit,
c o m p l e t i n g P L A Y m o d e e n t r y .
r
Fast-Forward Operation
1. Pressing the FF button starts the motor rotating, and at
t h e s a m e t i m e t u r n s t h e F F s o l e n o i d O N . T h e F F l e v e r
is pressed by arm (B), and locked by the lockplate (see
F i g . 4 ) .
2. The action of the FF lever causes the FF gear to contact
t h e F R u n i t a n d r e e l u n i t . T h r o u g h c o u p l i n g w i t h a r m s
( H ) a n d ( l ) , i t a l s o a d v a n c e s t h e h e a d m o u n t t o t h e b l a n k
(between selection) detection position.
P i n c h R o t t e r
T P U N i t
A r m ( G )
A r m ( F )
F i s . 8
R e e I
2.
1
P L A Y L e v e r
F R U n i t G e o r
I
/'-'- Reet Unit
\
r , G . o , .
U n i t
I
A r m ( l )
H e o d P t o t e P i n
1
- A r m ( H )
F i s . 9