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PRODUCTION CHANGES
C h a n g e s i n t h e e q u i p m e n t t o i m p r o v e p e r f o r m a n c e o r t o s i m p l i f y c i r c u i t s a r e i d e n t i f i e d by
a " R e v i s i o n L e t t e r " , w h i c h i s s t a m p e d on t h e u n i t i n c l u d e s a l l p r e v i o u s r e v i s i o n s .
R e f e r
t o t h e P a r t s L i s t f o r d e s c r i p t i o n o f p a r t s a f f e c t e d by t h e s e r e v i s i o n s .
CHANNEL GUARD ENCODER/DECODER MODEL 4EK16A10
R e v . A
-
T o o b t a i n c o r r e c t o u t p u t l e v e l .
C h a n g e d R8.
CHASSIS
&
RF ASSEMBLY 19E500881-G1
t
h r u -G4
R e v . A
-
T o f a c i l i t a t e t u n i n g o f low I F a n d i m p r o v e c r i t i c a l s q u e l c h .
Added C439 a n d C440.
Changed C6
&
C8 on A413/A414.
R e v . B
-
To i n c o r p o r a t e new PA t r a n s i s t o r s .
Changed Q410 a n d Q411.
Added R411.
O u t l i n e D i a g r a m Was:
COLOR DOTS SHOULD
E SAME COLOR
OR BEST RESULTS
R
R e v . C
-
To i n c o r p o r a t e a new m u l t i p l i e r t r a n s i s t o r a n d d e c o u p l e s u p p l y v o l t a g e .
Changed
Q1. Added C15 a n d R7.
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