Sony RCD-W3 Service Manual

6
RCD-W3
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components com-
monly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated cir-
cuits and some field-effect transistors and semiconductor chip components. The following techniques should
be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off
any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device, which should be removed for potential shock reasons
prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive sur-
face such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can
generate electrical charges sufficient to damage ESD devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices.
6. Do not remove a replacement ESD device from its protective package until immediately before you are ready
to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by conductive
foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the
protective material to the chassis or circuit assembly into which the device will by installed.
CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL
OTHER SAFETY PRECAUTIONS.
8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion
such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gen -
erate static electricity sufficient to damage an ESD device).

Sony RCD-W3 Specifications

Power

power requirements	U.S.A. and Canada 120 V AC, 60 Hz
power requirements other countries	110 – 240 V AC, 50/60 Hz
power consumption	20 W

Audio Specifications

frequency response	20 Hz – 20, 000 Hz (±0.5 dB)
signal-to-noise ratio	More than 100 dB
dynamic range	More than 95 dB

Inputs

analog in impedance	47 kilohms
rated input	330 mVrms
minimum input	125 mVrms

Outputs

analog out rated output	2 Vrms (at 50 kilohms)
load impedance	over 10 kilohms
phones	28 mW, 32 ohms

Weight and Dimensions

dimensions	430 × 108 × 368 mm
mass	4.6 kg