Sony ZS-M35 Service Manual page 2

Coding
Adaptive TRansform Acoustic Coding (ATRAC)
Modulation system
EFM (Eight-to-Fourteen Modulation)
Number of programme positions
2 stereo programme positions
Frequency response
20 - 20,000 Hz +1/–2 dB
Signal-to-noise ratio
Over 80 dB (during playback)
Wow and flutter
Below measurable limit
General
Speaker
Full-range: 8 cm (3 in.) dia., 4 ohms, cone type (2)
Inputs
LINE IN (stereo minijack): Sensitivity 436 mV/
870 mV
Outputs
Headphones jack (stereo minijack) (1):
For 32 ohms impedance headphones
Power output (excluding US model)
5 W + 5 W (at 4 ohms, 10 % harmonic distortion
in AC operation)
Power requirements
For personal minidisc system:
120 V AC, 60 Hz
For back-up memory:
4.5 V DC, 3 size AA (R6) batteries
For remote control:
3 V DC, 2 size AA (R6) batteries
Power consumption
24 W
Dimensions (incl. projecting parts)
Approx. 498.5 × 173.5 × 227 mm (w/h/d)
× 6 × 9
3 / 1 / 1 /
(17 inches)
4 2 2
Mass
Approx. 5.2 kg (13 lb. 4 oz)
Supplied accessories
AC power cord (1)
Remote control (RMT-CM35A) (1)
AM loop antenna (1)
Design and specifications are subject to change
without notice.
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
WT-540A. Follow the manufacturers' instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
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)
0.15µF
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!!
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
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.
– 2 –
To Exposed Metal
Parts on Set
AC
1.5k Ω
voltmeter
(0.75V)
Earth Ground
À LA SÉCURITÉ!!