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3. FM ALIGNMENT
PROCEDURES
(Selector switch in the "FM" position)
Signa! Source
Connection
Signal
Frequency
indicator
Connection
Set Dial
Pointer to:
Adjust:
3.1 FM IF ALIGNMENT
Oscilloscope to
L106 for maximum and
terminals @® through
matching network
VTVM
to
LorR
channel output
(JVO02)
tuning gang open.
output.
L101, L103 for
(300 ohms, balanced)
90 MHz
maximum
output.
Maintain
RF level
oe
below limit.) (J036)
Ant. RF trimmer for
106 MHz
Repeat steps 1 to 4.
maximum
output.
L201 lower core for FM
No connection
No signal
~
-_
TENG
terete
pointer indicated its
center.
Distortion meter to
L201
(primary core upper)
L or R channe! out-
for minimum
distortion.
FM generator 1 mV
put (JVO2)
output to FM antenna
terminals ® through
98 MHz
98 MHz
matching network
(300 ohms, balanced)
(JO36)
3.3 MUTING
CIRCUIT
ALIGNMENT
RF generator
12.5uV
[R207 for 12.5uV
output to FM antenna
VTVM
to Rort
threshold level. {During
terminals @ through
98 MHz
channel output
98 MHz
the adjustment turn
matching network
(JVO2)
the FM
MUTING
push-
(300 ohms, balanced) (JO36)
switch '"'ON").
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