Sony Shower Mate ICF-S79 User manual

ICF-S79
FM/AM SYNTHESIZED RADIO
ICF-S79L
FM/MW/LW SYNTHESIZED RADIO
ICF-S79V
TV/WEATHER/FM/AM SYNTHESIZED RADIO
MICROFILM
US Model
ICF-S79V
AEP Model
ICF-S79/S79L
UK Model
ICF-S79L
SPECIFICATIONS
SERVICE MANUAL
ICF-S79/S79L/S79V
Photo: ICF-S79V
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

– 2 –
This section is extracted from
instruction manual. SECTION 1
GENERAL

– 3 –

– 4 –
Note: Follow the disassembly procedure in the numerical order given.
REAR CABINET
SECTION 2
DISASSEMBLY
2 six screws
(BTP 3
× 25)
1 battery case li
d
4 rear cabinet
5 antenna lead
5 BATT lead (red)
3 two claws
5 BATT lead (white)

FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
L8 87.5 MHz (TV 2 ch) 2.3 ± 0.1 V (1.0 ± 0.1 V)
Confirm 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 87.5 MHz (TV 2 ch (59.75 MHz))
CT4 108.0 MHz
( ): ICF-S79V
ICF-S79L only
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.
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
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
AM (MW) TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 <MW side> 621 kHz (590 kHz)
CT3 1,395 kHz (1,490 kHz)
< >: ICF-S79L
( ): ICF-S79V
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2 455 kHz
– 5 –
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
SECTION 3
ELECTRICAL ADJUSTMENTS
[AM (LW/MW) Section]
Setting:
BAND switch: AM (MW) or LW
0dB=1 µV
[FM/TV Section]
Setting:
BAND switch: FM1 or TV
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.
ICF-S79V only TV TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 WEATHER 2 ch (162.40 MHz)
CT1 TV 13 ch (215.75 MHz)
ICF-S79V only TV IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 10.7 MHz
AM RF SSG
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
speaker terminal
set
FM RF SSG
± 22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level meter
speaker terminal
set
FM lead wire antenna terminal
0.01
µ F
+
–
digital voltmete
r
MAIN board
TP
(VT)