M A I N T E N A N C E P R A C T I C E S
KEY ITEMS
Hold resolver so it does not fall
away from mounting plate (20)
while removing gear (33).
D E TA 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)
Hold servo m o t o r s o i t does not
fall away from mounting plate
(20).
Remove two screws (18) and two washers (19)
th a t hol d s er v o mo t o r t o m ou n t in g p la t e (20 ) .
Carefully withdraw servo motor from its
mounting place.
(a)
(b)
6. REASSEMBLY
A. JOB/USE
Reassembly of the ADF Receiver is required after completion of those procedures concerned
with inspection cleaning, adjustment, troubleshooting and repair.
(1)
REASSEMBLY PROCEDURE: RECEIVER (See Figure 301)B.
Reassembly procedures are the reverse of the disassembly procedures with the exceptions
of the following special instructions.
(1)
KEY ITEMS
D E T A I L S T E P S / W O R K I T E M S
(a) Tuning di al (24)
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
panel (23).
4 T i g h t e n s e t s c r e w s ( 2 5 ) .
(b ) R-F s hi el d (38 )
Make certain all R-F shield alignment holes
line up properly over the tuning "slugs" of
module assemblies.
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.
2Posi tions fro m left to,rig ht (facin g R-F shield )
are :loop module, rf module (balance modulator
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
April 1965
(R e v i se d J a nu a r y 196 8 )
Page 126
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General