Lafayette LR-9090 Service Manual
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mt
Pages
ATIGNMENT-SELECTOR IN AM POSITION
AM
Connect
GENERATOR
FREQUENCY
45Skt{z
40
0
-hert
Modu I at
60 0kHz
1640k[{z
140OkHz
33-42 Courtesy
generator
z
ion
-ffrodulor
across
RADIO
SETTING
Tuning
ful
1y
6 00kt
1640kllz
1400k1{z
loop f,ashioned
DIAL
gang
open
Iz
hi'ti
of
LAFAYETTE
INDICATOR
Output meter
across voice
(ompone
MDIO
of several
coil
il
il
ntr-
ELECTRONIcs
turns of wire. Set volune at
ADJUST
CF4
T4
cr7,
cr5
cr6
Adjust for maxirnum.
no
further
Adjust for maximum.
T3
Adjust
,
just
Ad
until
irnprovement
maximum.
for
f or
maximum.
no further
lafayette
naxinun.
REMARKS
Repeat
Repeat
improvement
until
is
noted.
Alt al ignment
IB-9090
is noted.
FM IF
ALIGNMENT
High side
60-hertz,
Use
60-hertz
Use
GENERATOR
FREQUENCY
T0
"7MHz
450kHz
FM
Connect
Sweep
RF ATIGNMENT.-SELECTOR
Adjustment
GENERATOR
FREQUENCY
108MFIz
Modulated
88MHz
Modul.ated
USING
generator
of
frequency-modulated
sawtooth voltage
generator
of
coils
FM SIGNAL
thru
DIAL
RADIO
SETTING
Po
int of
non-
int erferenc e
I
IN FM POSITION
across
by bending
DIAL
RADIO
SETTING
108MHz
8 8lt4Hz
GENERATOR-SELECTOR
.001uF
to
Base
signal,
in
Vert
scope to
Junction
Vert
scope to posi-
tive
antenna terrninals
should
DC
to
c25
for horizontal deflection.
scope
INDICATOR
input
input
end
not
INDICATOR
probe
positive
FTR3.
450ktlz sweep.
of
L3
T1,
of
CzS
with lz}-ohm
be attempted
of VTVM
end
IN FM POSITION
ADJUST
(1) Disconnect
T2
FTs
,
(1)
r1
carbon
unless
ADJUST
FT4
FT3,
,
FTl
FTz,
cTs
cr4,
crz,cr1
Adjust
for
of response
Re connect
Adjust
and
Fig
Tl
straightness of
2.
.
resistor
for
for
i 1 no
l-s
further
the coil
.Adjust
just
Ad
unt
REMARKS
stabilizing
maximurn
similar
for
maximum
series
1n
deformed
REMARKS
maximum.
maximum.
improv
capacitor
gain
to Fig.
line,
with
symmetry
and
1.
amplitude
similar
each 1ead.
or replaced.
Repeat FIvl RF steps
ement
i
s not ed
to
.
I 9kHz
Disconnect
coupling
Lytic
CzS.
Adjust
RV4 for
l9kHz
+20H2
at
TP4.
33
FM
STEREO
Tune
control
Signa1 Strength
ADJUSTMENT
receiver
RV3
for
a stereo
for best
signal. Adjust
separation.
balance
control for equal channel output.
Adjust
Separation
For
For
Tune
Al'1
on Signal
FM
Tune
and adjust RVI
strong
Meter Ml.
strong
PSPA027CoX
o
o
-
I
AIvt
station,
signal
for
o
o
adjust RV
adjust
,
Maximum deflection on Meter
tuning
oo
2
for Maximum
for
0 on Tuning
*8*6o/:l
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t
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tl
oo
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deflection
lr{eter
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34
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