P A U S E Operation - Kenwood DP-1100 B Service Manual

3. OPERATION OF MAIN MICROPROCESSOR
3-1-8

P a u s e operation

T h e pause o p e r a t i o n is p e r f o r m e d by a p p l i c a t i o n of the search
s y s t e m d e s c r i b e d in s e c t i o n 3 - 1 - 7 " S e a r c h o p e r a t i o n " .
T h e f o l l o w i n g is the o p e r a t i o n p r o c e d u r e .
(1) T h e a b s o l u t e t i m e ( m i n , sec a n d t e n ' s digit of f r a m e
value) at the p o i n t of t i m e w h e n the PAUSE key is press­
ed is s t o r e d in m e m o r y as the s e a r c h i n g address.
In D P - 1 1 0 0 / B , t h e t e n ' s digit of f r a m e value is also
s t o r e d in t h e m e m o r y t o i m p r o v e precision in pause
o p e r a t i o n .
(2) T h e stage N o . in w h i c h kick starts is set to stage 2
( b a c k w a r d 3-track k i c k ) , u p o n w h i c h search o p e r a t i o n is
t h e n s t a r t e d .
(3) Even w h e n s e a r c h is c o n v e r t e d , kick in t h e d i r e c t i o n of
t h e disc c e n t e r is p e r f o r m e d t o c o n t i n u e search o p e r a ­
t i o n .
(4) W h e n t h e key o p e r a t i o n t o c a n c e l pause m o d e is per­
f o r m e d , t h e pause o p e r a t i o n (search o p e r a t i o n ) is c o m ­
pleted after c o n v e r g e n c e of s e a r c h .
In a d d i t i o n , w h e n t h e key o p e r a t i o n t o c a n c e l pause m o d e is
n o t p e r f o r m e d even after lapse of a p p r o x . 1 h o u r after start of
pause o p e r a t i o n , the p r o t e c t i v e f u n c t i o n w o r k s t o enter t h e
stop m o d e a u t o m a t i c a l l y t o t u r n OFF laser d i o d e s .
D P - 1 1 0 0 B II
1 2 9