M A I N T E N A N C E P R A C T I C E S
T A B L E 1 0 5
1
SERVO AMPLIFIER-INDICATOR
CONDITIONS:
Frequency: 200 KC
Loop rotated 90° from null (Motor (17) gear
must be disengaged from gear train prior
to rotating loop.)
I n p u t : 1 0 0 j i v p e r - m e t e r , u n m o d u l a t e d
Function: ADF
All voltages measured to ground ±107o
WAVEFORM
R M S V O L T A G E
FREQUENCY
TEST POINT
+
47 cps Pin 7(Jl)
.15v0
+
47 cps Coll. (Ql)
1. 3v0
Base (Q2)
.15v
47 cps
0
+
47 cps Coll. (Q3)
.6v0
(
+
Coll. (Q4)
1. 5v
47 cps
47 cps Base (Q5)*
.9v
Base (Q6)*
1. 8v
47 cps
47 cps Emitt. (Q5)
.18v
+
47 cps Coll. (Q5)*
2. 6v
0
+
0
Coll. (Q6)*
47 cps
-2. 6v
E;
47 cps Base (Q7)
.28v0
(
*or vice versa, depending upon phase of ADF signal at these test points.
April 1965
(Revised April 1967)
Page 122
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