2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by 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 electro static discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equiped 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 equiped with ES devices, place the assembly on a conductive surface such as aluminium
foil, to prevent electrostatic charge build up 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 remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge 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, aluminium 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 body 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).
6
SA-PM33EE
Summary of Contents for SA-PM33EE
Page 11: ...7 Operating Instructions Procedures 7 1 Main Unit Remote Control Operation 11 SA PM33EE ...
Page 12: ...7 2 Disc Information 12 SA PM33EE ...
Page 21: ...9 3 Main Parts Location Diagram 21 SA PM33EE ...
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Page 38: ...11 2 Checking and Repairing of Panel P C B 38 SA PM33EE ...
Page 39: ...11 3 Checking and Repairing of Tuner Pack P C B 39 SA PM33EE ...
Page 40: ...11 4 Checking and Repairing of Transformer P C B 40 SA PM33EE ...
Page 41: ...11 5 Checking and Repairing of Main P C B 41 SA PM33EE ...
Page 42: ...11 6 Checking and Repairing of CD Mechanism P C B 42 SA PM33EE ...
Page 43: ...11 7 Checking and Repairing of Speaker Terminal P C B 43 SA PM33EE ...
Page 44: ...11 8 Checking and Repairing of Power P C B 44 SA PM33EE ...
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Page 81: ...22 Troubleshooting Flowchart CD Section Circuit 81 SA PM33EE ...
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Page 83: ...23 Exploded Views 23 1 Cabinet Parts Location SA PM33EE 83 ...
Page 84: ...23 2 Cassette Deck RAA4402 1S Traverse Deck Part Location SA PM33EE 84 ...
Page 85: ...23 3 Packaging SA PM33EE 85 ...
Page 86: ...SA PM33EE 86 ...