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Zenith D952X - Page 17

Zenith D952X
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Align
IF
channel
for
maximum
output
Set
oscillator
to
dial
scale
Align
RF
stage
Align
antenna
stage.
Adjust
Primary
and
Secondary
of
ratio
detector
for
maximum
amplitude
and
symmetry,
as
shown
in
Scope
Pattern
"A"
Align
I.F.
transformer
for
maximum
output
and
symmetry.
This
pattern
is
not
necessarily
identical
to
the
overall
Scope
Pattern
"B"
Align
I.F.
transformer
for
maximum
output
and
symmetry
as
indicated
in
Scope
Pattern
"B"
Set
oscillator
to
dial
scale
Align
FM
Detector
stage
for
maximum
Align
FM
Antenna
stage
for
maximum
ADJUST
nent
Use
A
Sianal
With
400
Hertz
Modulation,
Bandswitch
in
AM.
LA
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Repeat
Steps
No.
2
&
3
C1H
|
T101
Repeat
Steps
No.
5
&
6
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C1F
L212
L214
L208
&
L209
L205
&
L206
L201
&
L202
Readjust
L201,
L202,
L205,
L206,
L208
&
L209
co
6
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Repeat
Steps
15
&
16
C1C
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L2
if
necessary
C1A
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L1
if
necessary
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SET
DIAL
TO
600
KHz
1600
KHz
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600
KHz
1400
KHz
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600
KHz
1400
KHz
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MHz
106
MHz
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90
MHz
106
MHz
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90
MHz
L
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INPUT
SIGNAL
FREQUENCY
455
KHz
1600
KHz
600
KHz
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600
KHz
1400
KHz
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106
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90
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106
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DUMMY
ANTENNA
47
ohm
in
shunt
with
gen.
output.
Then
from
hot
lead
a
27
ohm
in
series
with
a
.001
MFD
capaci
tor.
u.
D
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CD
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CD
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CONNECT
GENERATOR
TO
One
turn
loosely
coupled
to
wavemagnet
nent
Use
A
Sianal
With
400
KHz
I
Term.
No.
5
of
T205
3rd
IF
Trans.
Test
Point
"G"
Term.
No.
3
of
T203
2nd
IF
Trans.
Test
Point
"F"
Term.
No.
4
of
T201
1st
IF
Trans.
Test
Point
"E"
Connect
to
Test
Point
"D
A
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c.
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or
AM
Alianr
VTVM
Speaker
Voice
Coil
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s-
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.............................
Scope
Ratio
Detector
Test
Point
"H"
Scope
Last
FM
IF
Test
Point
"G"
In
Steps
13B
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Scope
Last
FM
IF
b
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s
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