Control Inputs - Kenwood DP-1100 B Service Manual

•P-1100B 11
2. IC OPERATION OF EACH CIRCUIT AND PIN DESCRIPTION
2 - 1 - 2 Q 1 0 2 ( T C 4 0 5 1 B P ) S V C s w i t c h
T C 4 0 5 1 B P , of 8 - c h a n n e l
c a p a b l e of s e l e c t i n g a n a l o g or digital s i g n a l , or c o m b i n i n g
t h e m . T h e s w i t c h pin c o r r e s p o n d i n g t o e a c h c h a n n e l t u r n s
ON w i t h the digital signal f r o m t h e c o n t r o l p i n .
T r u t h table

CONTROL INPUTS

INHIBIT C B A
L L
L L
L L H
L L H H
L H
L H
L H H
L H H H
6 4
c o n f i g u r a t i o n , is a m u l t i p l e x e r
" O N " CHANNEL
TC4051BP
L
L 0
L H 1
L 2
3
L L 4
L H 5
L 6
7
T a b l e 2 - 1 C
Block diagram
Fig. 2 - 1 D