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OQT-70H(R)
©)
FM IF/RF ADJUSTMENT
SWITCH
POSITION
SIGNAL
ENERATOR
| 400 Hz, 30%, FM modulated
TEST
FRE-
DIAL
STEP}
STAGE
| QUENCY | POINTER
SETTING
7
—
Highest
TC2
frequency
6
88 MHz
88 MHz
Ee
Tracking
[108 MHz] 108 Me
Repeat steps 4, 5 and 6, 7 until no further improvement can
be made.
oo
$3
> ®
54
1. Using a minus
driver, turn
the core of
T2 counter-
clockwise
_
before taking
it out of the
bobbin.
2. Adjust for
best "IF"
curve.
T2
Adjust for best
"*S'' curve.
High
frequency
Adjust for
maximal
output.
VCO FREQUENCY ADJUSTMENT
GENERATOR | (mono signal)
DIAL
FREQUENCY | POINTER | ADJUST. | Remarks |
SETTING
MENT
FM mono position
FM stereo position
(unmodulated)
98 MHz at
VR1
Adjust for
54 dB
38.00 kHz + 100 Hz.
FM Sweep Generator
GND
GND
Figure 12—1
FM
IF
FM Signal
(See Figure 12-6)
Telescopic Rod
Generator
Dummy
Antenna
GND
GND.
10 kohm
Figure 12—4
FM
RF
FM Signal
Generator
Telescopic Rod
IC3
Frequency
Antenna
© pin
1000 pF
Counter
GND
GND
330 kohms
(See Figure 12—6)
Figure 12—5
FM
STEREO
To Telescopic Rod Antenna
R1 = 37.5 ohms
Z= 78 ohMS< po = 75 ohms
ie
R1 = 50 ohms
2-30 ohms<
2 = 50 ohms
To Chassis GND
Z: Output impedance of signal generator
Figure 12—6
FM
DUMMY
—12—
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