HCD-G1300, LBT-G1300 - Sony Audio Service Manual (repair manual). Page 11

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0 dB=1µV

+

–

TP2
(VT)

Tuner board

DC voltmeter

Procedure:
1. Set the reception frequency of the unit to 530 kHz.
2. Adjust L105 for 1.2 ± 0.05 V reading on the DC voltmeter.
3. Set the reception frequency of the unit to 1,710 kHz.
4. Confirm that the voltage reading on the DC voltmeter is within

8.0 ± 0.5 V.

Adjustment Location: TUNER board

loop antenna

Field strength dB (µV/m) = SSG output level dB (µV/m) –26dB.

loop antenna
(Supplied accessories)

AM RF SSG

30% amplitude
modulation by
400Hz signal

60cm

set

AM antenna
terminal (JK101)

Procedure:
1. Tune the set to 600 kHz.
2. Set the output of AM RF SSG so that the input level of the set

will become 60 dB (µV/m).

3. Adjust L104 so that when the waveform on the oscilloscope is

maximum, no noise appears.

4. Tune the set to 1,400 kHz.

5. Adjust TC102 so that when the waveform on the oscilloscope is

maximum, no noise appears.

• Repeat the procedures in each adjustment several times, and the

tracking adjustment should be finally done by the trimmer
capacitors.

Adjustment Location: TUNER board

DC voltmeter

TP2
(VT)

Tuner board

+

–

Procedure :
1. Set the reception frequency of the unit to 87.5 MHz.
2. Adjust L103 for 1.2 ± 0.05V reading on the DC voltmeter.
3. Set the reception frequency of the unit to 108 MHz.
4. Confirm that the voltage reading on the DC voltmeter is within

7.8 ± 0.5V.

Adjustment Location: TUNER board