Fisher FM-120L - Page 4

: Phase Comparator for Lamp
: Low Pass Filter
: Phase Comparator for VCO
: Voltage Controlled Oscillator
: Direct coupled Type Flip-flop
FM IF IC LA1231 SIGNAL FLOW
Vee +12V
COMPARISON BIAS VOLTAGE
AFC
_ TUNING
AFC. TUNING METER La
a eee ee ey eee ees eee ee Co METER DRIVE we aR
CIRCUIT 7 s
IF
QUADRATURE
Bk
L1O00pA
NEUE
:
|
DETECTOR
P
6 pH Auow OUT
(TO MULTIPLEX IC)
§ MUTINGIN
AF AMP
AF MUTE |
CONTROL
LEVEL
I
1
i
t
i]
I
|
{
i
|
{
DETECTOR
ond
LEVEL
DETECTOR
MUTING SW.
a} MUTING
SIGNAL METER MUT DRIVE t2 OUT
TO FRONT ORIVE CIRCUIT CIRCUIT
END ro
CELAYED bi
AGC Se ae ecias A
4 i4 16 200pA 13 (TO MULTIPLEX IC)
ax TUNING METER
Sy
O OUT PUT
SIGNAL
METER
FM MPX IC LA3350 SIGNAL FLOW
O)
OFF
COMPOSITE SIGNAL
iN PUT PRE AMP
F.F TUFF
zo° z30° ee
IS9KH2Z Poa IS KHZ ed
(1)
INPUT a
2)
7 MW
I ANTENNA
(10) (is)
i SIGNAL
(/) METER
IC TOP VIEW
6 15 1413 2 11 10 9
Vecorlev
OUTPUT
IC TOP VIEW