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AZIMUTH ADJUSTMENT
GENERATOR
MORE THAN
22Kohm
1. Remove back cabinet,
IF SWEEP TEST
SCOPE
2. Load azimuth tape (more than 10 kHz) and play back the tape in
direction,
RECEIVER
S Curve
3. Insert © driver into @) and adjust headphone output for max.
FM SWEEP
UNDER TEST
4. Play back the tape in
direction. Adjust screw(B) for max. output.
5
. Play back the tape in [REV] direction again and check if headphone output is max.
If the check is OK, proceed step 6 and if NG, repeat steps 3 and 4 .
. Fix adjusted screws
and © with lock tight.
7. Assemble back cabinet.
Oo
.
Figure 11
3-TURN
LOOP ANTENNA
LOCATED
NEAR THE L004.
Figure 10
(Driver)
FM-RF ALIGNMENT
~
. Set the volume control to mid-position.
Adjust the signal generator frequency
as indicated
in FM-RF
ALIGNMENT
CHART,
and maintain a sufficient signal
output level to provide a measurable indication.
. Proceed as outlined in the FM-RF ALIGNMENT
CHART.
[$$
OWN
=
oO
1. Connect the frequency counter to the headphone jack.
4. Adjust R991 for 3000 Hz +30 Hz reading on the frequency
Figure 13
Repeat steps 1 and 2 as required.
DOLBY ADJUSTMENT
1. Load MTT-150 and adjust R491 and R492 so that 100mV is obtained at TP3 and TP4.
counter.
,
Ant. Coil
Adjust for maximum
98 MHz
Tune to signal
L071
output indication.
Notes: (1) When P.C. Board is mounted on the mechanism chassis after completion of FM alignment, the receive frequency
will shift about 200 kHz in higher direction.
So set the frequency to a value about 200 kHz lower than the reception frequency in consideration of the shift,
and check the frequency coverage range after the P.C. Board has been assembled completely.
If the range is out
of the limit, adjust the frequency again.
(2) When changing variable capacitor diode(s), change both variable capacitor diode(s) for antenna and OSC circuts
simultaneously.
In this case, paired variable capacitor diode(s) should be used.
HEADPHONE
JACK
FM SIGNAL
FM DUMMY
GENERATOR _ KT-4087/V780
ANTENNA
EARTH
(MECHA. CHASSIS)
CAUTION:
Figure 12
When
realigning the FM Receiving Frequency, the highest end of the frequency range should not be more than 108 MHz
and the lowest end of the frequency range should not be less than 87.5 MHz, in order to comply with FTZ regulations in
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