BENDIX ADF-T12B Maintenance Manual page 48

M A I N T E N A N C E P R A C T I C E S
K E Y I T E M S
Hold resolver so it does not fall
away from mounting plate (20)
while removing gear (33).
D E T A I L S T E P S / W O R K I T E M S
Carefully remove gear (33) from shaft ot
r e s o l v e r ( 2 9 ) .
(c)
W i t h d r a w r e s o l v e r f r o m i t s m o u n t i n g p l a c e .
(d)
R e m o v e s e r v o m o t o r ( 1 7 )
(8)
H o l d s e r v o m o t o r s o i t d o e s n o t
fall away from mounting plate
( 2 0 ) .
Remove two screws (18) and two washers (19)
t h a t h o l d s e r v o m o t o r t o m o u n t i n g p l a t e ( 2 0 ) .
Carefully withdraw servo motor from its
mounting place.
(a)
(b)
6 . R E A S S E M B L Y
A . J O B / U S E
Reassembly of the ADF Receiver is required after completion of those procedures concerned
with inspection cleaning, adjustment, troubleshooting and repair.
(1)
R E A S S E M B LY P R O C E D U R E : R E C E I V E R ( S e e F i g u r e 3 0 1 )
B .
Reassembly procedures are the reverse of the disassembly procedures with the exceptions
of the following special instructions.
(1)
K E Y I T E M S D E T A I L S T E P S / W O R K I T E M S
( a ) Tu n i n g d i a l ( 2 4 )
l_ Before mounting tuning dial onto shaft of
tuning capacitor (52) unmesh tuning capacitor
plates fully to minimum capacitance.
2^ Mount tuning dial on shaft of tuning capacitor ,
but do not tighten setscrews (25).
3 R o t a t e t u n i n g d i a l u n t i l t h e 8 5 0 k c m a r k ,
lines up with "lubber line" on glass of front
p a n e l ( 2 3 ) .
4 T i g h t e n s e t s c r e w s ( 2 5 ) .
( b ) R - F s h i e l d ( 3 8 )
M a k e c e r t a i n a l l R - F s h i e l d a l i g n m e n t h o l e s
line up properly over the tuning "slugs" of
m o d u l e a s s e m b l i e s .
1
( c ) M o d u l e a s s e m b l i e s ( 4 4 ) t h r o u g h ( 4 7 )
1_ Make certain module assemblies are
r e p l a c e d i n t h e i r p r o p e r o r d e r .
2 P o s i t i o n s f r o m l e f t t o , r i g h t ( f a c i n g R - F s h i e l d )
a r e : l o o p m o d u l e , r f m o d u l e ( b a l a n c e m o d u l a t o r
a s s e m b l y a t t a c h e d ) , o s c i l l a t o r m o d u l e a n d
m i x e r m o d u l e .
R E A S S E M B L Y P R O C E D U R E : S E R V O A M P L I F I E R - I N D I C A T O R ( S e e F i g u r e 3 0 3 )
C .
Reassembly procedures are the reverse of disassembly procedures with the exception of the
following special instructions.
(1)
I
A p r i l 1 9 6 5
( R e v i s e d J a n u a r y 1 9 6 8 ) Page 126