Heathkit AR-14 - STEREO ALIGNMENT; Stereo Alignment Chart

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STEREO ALIGNMENT
Equipment needed: Audio generator anci AC
VTVM. The Heathkit Models IG- 72 or IG-82
Audio Generators and the Model IM-21 AC
VTVM, or their equivalents may be used.
( ) Disconnect the negative lead of capacitor
C39 from the circuit board at point R.
See Figures 4 and 5 (fold-out from Page 65).
Complete the steps in the Stereo Alignment Chart
and the steps that follow the chart.
STEREO ALIGNMENT CHART
AUDIO GENERA TOR
PREPARATION
Frequency
AND
Connect To
And
CONTROL SETTINGS
Output
SOURCE
38 kc (±200 cps)
switch to@ FM.
.
01 volt rms
.PHASE switch
Negative
output.
pulled out.
(-) lead
of
capac-
itor C39.
Push PHASE
67 kc . 1 volt
switch in.
rms output.
Adjust
PHASE con-
trol to about
2
o'clock
position.
( ) Disconnect the AC VTVM and the audio gen-
erator from the Receiver.
( ) Reconnect the negative (-) lead of capacitor
C39 to the circuit board at point R and
solder the connection.
NOTE: To obtain the most accurate alignment,
coil L7 and transformer T7 should be adjusted
by using an FM stereo broadcast signal, rather
than by using instruments.
( ) Adjust coil L7 and transformer T7 by com-
pleting the steps under FM Stereo Adjust-
ments on Page 48.
This completes the Stereo Alignment.
I
VTVM
Connect To
TP3
Page 61
ADJUST
Coil
For VTVM
Reading
Maximum
LB
reading (about
. 2 volt
rms).
Minimum
L6 reading (about
. 007 volt
rms).