2 Prevention of Electrostatic Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits 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 electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
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 ES devices, place the assembly on a conductive surface 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 ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable
conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution:
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD)
sufficient to damage an ES device).
8
SA-VK470EE
Summary of Contents for SA-VK470EE
Page 3: ...3 SA VK470EE ...
Page 12: ...12 SA VK470EE ...
Page 40: ...40 SA VK470EE ...
Page 42: ...9 3 Main Components and P C B Location 42 SA VK470EE ...
Page 54: ...9 15 2 Replacement of Motor Capstan Belt A Capstan Belt B and Winding Belt 54 SA VK470EE ...
Page 88: ...SA VK470EE 88 ...
Page 98: ...98 SA VK470EE ...
Page 116: ...SA VK470EE 116 ...
Page 124: ...SA VK470EE 124 ...
Page 136: ...136 SA VK470EE ...
Page 137: ...24 Exploded Views 24 1 Cabinet Parts Location SA VK470EE 137 ...
Page 138: ...SA VK470EE 138 ...
Page 139: ...24 2 Deck Mechanism Parts Location RAA4111 S SA VK470EE 139 ...
Page 140: ...24 3 Packaging SA VK470EE 140 ...
