SONY ICFS79/V
Manual de Servicio

SECTION 3 ELECTRICAL ADJUSTMENTS
0dB=1 µV [FM/TV Section] Setting: BAND switch: FM1 or TV
FM RF SSG 0.01µF set level meter + �
FM FREQUENCY COVERAGE ADJUSTMENT L8 Confirm Adjust for a reading on digital voltmeter. 87.5 MHz (TV 2 ch) 2.3 ± 0.1 V (1.0 ± 0.1 V) 108.0 MHz 8.5 ± 0.5 V (12.5 ± 0.5 V)

Note: Not use the FM RF signal generator in this adjustment.

(

): ICF-S79V

FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L6 CT4 87.5 MHz (TV 2 ch (59.75 MHz)) 108.0 MHz

± 22.5 kHz frequency speaker terminal deviation by 400 Hz FM lead wire antenna terminal signal Output level: as low as possible

( ICF-S79L only

): ICF-S79V

[AM (LW/MW) Section] Setting: BAND switch: AM (MW) or LW
Put the lead-wire antenna close to AM RF SSG the set. set 30% amplitude modulation by speaker terminal 400 Hz signal Output level: as low as possible
digital voltmeter MAIN board TP (VT) + �

LW FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. CT5 153 kHz 2.3 ± 0.1 V

level meter + �

Confirm

279 kHz

8.5 ± 0.5 V

Note: Not use the AM RF signal generator in this adjustment.

ICF-S79L only
LW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L5 (LW side) 162 kHz CT2 243 kHz

AM (MW) FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. L9 531 kHz (530 kHz) 2.8 ± 0.1 V

Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

Confirm 1,602 kHz (1,710 kHz) 9.5 ± 0.5 V Note: Not use the AM RF signal generator in this adjustment.

(

): ICF-S79V

ICF-S79V only
TV FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. L2 Confirm WEATHER 2 ch TV 13 ch 1.0 ± 0.1 V 10 ± 0.5 V

AM (MW) TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L5 <MW side> CT3 621 kHz (590 kHz) 1,395 kHz (1,490 kHz)

< (
AM IF ADJUSTMENT

>: ICF-S79L ): ICF-S79V

Note: Not use the FM RF signal generator in this adjustment.

ICF-S79V only
TV TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L1 CT1 WEATHER 2 ch (162.40 MHz) TV 13 ch (215.75 MHz)

Adjust for a maximum reading on level meter. T2 455 kHz

ICF-S79V only
TV IF ADJUSTMENT Adjust for a maximum reading on level meter. T1 10.7 MHz

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