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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)
Adjustment and Connection Location:
Note: Not use the FM RF signal generator in this adjustment.
[MAIN BOARD] (Component Side)
(
): ICF-S79V
T2 AM IF FM antenna ground (JW17) T1 TV IF (ICF-S79V only) L8 FM FREQUENCY COVERAGE L6 CT4
IC2
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 speaker terminal modulation by 400 Hz signal Output level: as low as possible
LW FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. CT5 153 kHz 2.3 ± 0.1 V Confirm 279 kHz 8.5 ± 0.5 V Note: Not use the AM RF signal generator in this adjustment.
L2 TV FREQUENCY COVERAGE (ICF-S79V only) CT1
IC1
level meter + �
ICF-S79L only
LW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L5 (LW side) CT2 162 kHz 243 kHz
FM TRACKING
L1
TV TRACKING (ICF-S79V only) FM/TV
L9 AM (MW) FREQUENCY COVERAGE
MW L5 LW
antenna input (JW18)
digital voltmeter MAIN board TP (VT) + �
AM (MW) FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. L9 531 kHz (530 kHz) 2.8 ± 0.1 V
CT5 LW FREQUENCY COVERAGE (ICF-S79L only) L5 CT3
TV antenna ground (JW20)
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.
(
AM (MW) TRACKING ADJUSTMENT
): ICF-S79V
AM (MW) TRACKING CT2 L5
ICF-S79V only
TV FREQUENCY COVERAGE ADJUSTMENT Adjust for a reading on digital voltmeter. L2 WEATHER 2 ch 1.0 ± 0.1 V Confirm TV 13 ch 10 ± 0.5 V Note: Not use the FM RF signal generator in this adjustment.
Adjust for a maximum reading on level meter. L5 <MW side> CT3 621 kHz (590 kHz) 1,395 kHz (1,490 kHz)
