Sony SA-FT1H Service Manual page 2

SA-FT1H/WPFT1/SS-CNPFT1/MSPFT1/SRPFT1
SS-CNPFT1 (center speaker)
Speaker system 2 way, magnetically
shielded
Speaker units Woofer: 3 × 12 cm (× 2),
cone type
Tweeter: 2.5 cm, balanced
dome type
Enclosure type Bass reflex
Rated impedance 8 ohms
Power handling capacity
Maximum input power: 110 W
Sensitivity level 84 dB (1 W, 1 m)
Frequency range 150 Hz - 50,000 Hz
Dimensions (w/h/d) Approx. 430 × 45 × 44 mm
with table top stand Approx. 430 × 56 × 50 mm
Mass Approx. 0.5 kg
with table top stand Approx. 0.6 kg
SA-WPFT1 (subwoofer)
Speaker system Active subwoofer,
magnetically shielded
Speaker units Woofer: 20 cm, cone type
Enclosure type Acoustically Loaded
Bass reflex
Reproduction frequency range 30 Hz - 180 Hz
Continuous RMS power output 120 W (6 ohms 80 Hz,
10% THD)
Input
LINE IN (input pin jack)
General
Power requirements 120 V AC, 60 Hz
Power consumptions 70 W
0.3 W (standby mode)
Dimensions (w/h/d) Approx. 430 × 408 × 187 mm
Mass Approx. 10 kg
Supplied accessories
Speaker cord (short) (3)
Speaker cord (long) (2)
Audio connecting cord (1)
Table top stand cover (4)
Table top stand base (4)
Cushion (8)
Rear pad (16)
Screw (M5) (4)
Screw (M3) (8)
Design and specifications are subject to change without notice.
2
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SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, "metallized" knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
2. A battery-operated AC milliammeter. The Data Precision 245
3. Measuring the voltage drop across a resistor by means of a VOM
Fig. A. Using an AC voltmeter to check AC leakage.
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
WT-540A. Follow the manufacturers' instructions to use these
instruments.
digital multimeter is suitable for this job.
or battery-operated AC voltmeter. The "limit" indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a
passive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
0.15 µ F
1.5k Ω
Earth Ground
SAFETY-RELATED COMPONENT WARNING!!
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
AC
voltmeter
(0.75V)