GTE Sylvania RS-4744 Technical Service Data

GTE SYLVANIA
FACTORY PREPARED
TECHNICAL SERVICE DATA
S T E R E O H I - F I
B U L L E T I N : R67-3
M O D E L : RS4744
S E R V I C E P U B L I C A T I O N S D E P A R T M E N T
Entertainment Products Group 700 Ellicott Street - Batavia, N.Y.
M O D E L : R S 4 7 4 4
C H A S S I S : R 6 7 - 3
P R O D U C T S A F E T Y G U I D E L I N E S FOR A L L P R O D U C T S
C A U T I O N : Do NOT modify any circuit. Service work should be performed only after you are thoroughly familiar with all of the
following safety checks. Risk of potential hazards and injury to the user increases if safety checks are not adhered to.
S A F E T Y CHECKS
SUBJECT: Fire & Shock Hazard
1 . B e s u r e t h a t all c o m p o n e n t s a r e p o s i t i o n e d in s u c h a w a y t o
a v o i d p o s s i b i l i t y o f s h o r t s t o a d j a c e n t c o m p o n e n t s . T h i s is
e s p e c i a l l y i m p o r t a n t o n t h o s e c h a s s i s w h i c h a r e t r a n s p o r t e d
t o a n d f r o m t h e r e p a i r s h o p .
2 . A l w a y s r e p l a c e all p r o t e c t i v e d e v i c e s s u c h a s i n s u l a t o r s a n d
b a r r i e r s a f t e r w o r k i n g o n a s e t .
3 . C h e c k f o r d a m a g e d i n s u l a t i o n o n w i r e s i n c l u d i n g t h e A C
c o r d .
4 . C h e c k a c r o s s - t h e - l i n e c o m p o n e n t s f o r d a m a g e a n d r e p l a c e if
n e c e s s a r y .
5 . A f t e r r e - a s s e m b l y o f t h e s e t , a l w a y s p e r f o r m a n A C l e a k a g e
t e s t o n t h e e x p o s e d m e t a l l i c p a r t s o f t h e c a b i n e t s u c h a s t h e
k n o b s , a n t e n n a t e r m i n a l s , e t c . t o b e s u r e t h e set is s a f e t o
o p e r a t e w i t h o u t d a n g e r o f e l e c t r i c a l s h o c k . D o n o t u s e a
l i n e i s o l a t i o n t r a n s f o r m e r d u r i n g t h i s t e s t . U s e a n A C v o l t ­
m e t e r h a v i n g 5 0 0 0 o h m s p e r v o l t o r m o r e s e n s i t i v i t y in t h e
f o l l o w i n g m a n n e r :
C o n n e c t a 1 5 0 0 o h m 1 0 w a t t r e s i s t o r , p a r a l l e l e d b y
. 1 5 M F D A C t y p e c a p a c i t o r , b e t w e e n a k n o w n g o o d e a r t h
g r o u n d ( w a t e r p i p e , c o n d u i t , e t c . ) a n d t h e e x p o s e d m e t a l l i c
p a r t s , o n e a t a t i m e . M e a s u r e t h e A C v o l t a g e a c r o s s t h e
c o m b i n a t i o n 1 5 0 0 o h m r e s i s t o r , a n d . 1 5 M F D c a p a c i t o r .
R e v e r s e t h e A C p l u g o n t h e s e t a n d r e p e a t A C v o l t a g e
m e a s u r e m e n t s a g a i n f o r e a c h e x p o s e d m e t a l l i c p a r t . V o l t a g e
m e a s u r e d m u s t n o t e x c e e d . 3 v o l t R . M . S . T h i s c o r r e s p o n d s
t o 0 . 2 m i l l i a m p A C .
A n y v a l u e e x c e e d i n g t h i s l i m i t c o n s t i t u t e s a p o t e n t i a l s h o c k
h a z a r d a n d m u s t b e c o r r e c t e d i m m e d i a t e l y .
IMPORTANT: Always use genuine Sylvania replacement parts and tubes.
P r i c e $ 1 . 7 5