BENDIX ADF-T12B Maintenance Manual page 46

M A I N T E N A N C E P R A C T I C E S
f
( e ) W i t h d r a w f r o n t p a n e l f r b m c h a s s i s .
( 3 ) R e m o v e t u n i n g d i a l ( 2 4 )
( a ) L o o s e n t w o s e t s c r e w s ( 2 5 ) t h a t f a s t e n d i a l
(24) to shaft of tuning capacitor (52).
( b ) W i t h d r a w t u n i n g d i a l f r o m s h a f t .
Remove band switch detent (42).
( 4 )
( a ) R e m o v e t w o s c r e w s ( 4 3 ) t h a t f a s t e n
d e t e n t t o c h a s s i s .
W i t h d r a w d e t e n t s h a f t c a r e f u l l y
through module assemblies to
prevent possible damage to
w a f e r s w i t c h e s .
( b ) W ' i t h d r a w d e t e n t f r o m c h a s s i s .
Remove module assemblies (44) through (47). (5)
( a ) R e m o v e t w o s c r e w s ( 3 9 ) t h a t f a s t e n R F
s h i e l d ( 3 8 ) t o m o d u l e s t r a p ( 4 0 ) .
( b ) R e m o v e t h e o n e s c r e w ( 4 1 ) t h a t f a s t e n
m o d u l e r e t a i n i n g s t r a p ( 4 0 ) t o c h a s s i s ( 7 1 ) .
(c) Withdraw strap from its mounting position,
( d ) U n s o l d e r a t t a c h i n g w i r e s o n m o d u l e a s s e m b l i e s .
(
( e ) W i t h d r a w m o d u l e a s s e m b l i e s f r o m c h a s s i s .
Remove printed circuit board assembly (48).
(6)
( a ) R e m o v e s i x s c r e w s ( 4 9 ) t h a t s e c u r e p r i n t e d
c i r c u i t b o a r d a s s e m b l y t o c h a s s i s .
(b) Withdraw printed circuit board assembly
through bottom of chassis.
R e m o v e C W o s c i l l a t o r m o d u l e ( 5 0 ) . ( 7 )
( a ) R e m o v e t w o s c r e w s ( 5 1 ) t h a t f a s t e n C W
o s c i l l a t o r m o d u l e t o c h a s s i s .
( b ) W i t h d r a w C W o s c i l l a t o r m o d u l e .
( 8 )
R e m o v e t u n i n g c a p a c i t o r ( 5 2 ) .
( a ) R e m o v e f o u r s c r e w s ( 5 2 c ) t h a t s e c u r e
t u n i n g c a p a c i t o r ( 5 2 ) t o c h a s s i s ( 7 1 ) .
(b) Unsolder attaching wires on tuning capacitor.
( c ) W i t h d r a w t u n i n g c a p a c i t o r f r o m c h a s s i s .
C .
DISASSEMBLY PROCEDURE: SERVOAMP-INDICATOR (See Figure 303).
( 1 ) R e m o v e d u s t c o v e r ( 1 )
( a ) R e m o v e t w o s c r e w s ( 2 ) t h a t h o l d d u s t c o v e r
t o c h a s s i s a s s e m b l y ( 1 4 ) . c
A p r i l 1 9 6 5
(Revised April 1967)
Page 124