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7-1-3. FM adjustment
ae |
ITEM
CONNECTION | STEP
S.S.G
RADIO DIAL
Adjustment
Frequency
SETTING
Point
RESULT
1
87.3MHz
Tune to the
FL2
Best resonating
Lowest frequency | FM OSC coil
point of SSG.
Frequency
Fig. 2
i —
[—
=a
coverage
;
108.3MHz
Tune to the
VC2 OSC
Best resonating
¢
highest frequency | trimmer(VARICON) | point of SSG.
| =i
all
|
a
3
Repeat steps 1 and 2 several times.
4
90MHz
90MHz
Not required
|
—_
Tracking
Fig. 2
|
:
106MHz
106MHz
VCT1 ANT
Maximum
trimmer (VARICON)|
Output
aes Bea
i 6
Repeat steps 4 and 5 to obtain suitable sensitivity at
9O0MHz and 106 MHz.
FM OUTPUT : FIC1 (KA2293) PIN NO. 13, 14
IF GENERATOR
MAIN PCB
IC1 PIN NO 19
GNDO
O
B4 BODY
oO
| | 75 ohm DUMMY
MAIN PCB
RCD-750
i
or GND
4 ohm load
Fig. 2
A
OUT
VTVM
OSCILLOSCOPE
-32-
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