Xerox WorkCentre Pro 412 Service Manual

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Xerox WorkCentre Pro 412 Service Manual Manual pdf 21 page image

PrecautionsWorkCentre Pro 412Launch Issue3-1August 20013. PrecautionsFollow these ESD precautions to prevent equipment damage.1. Certain semiconductor devices can be easilydamaged by static electricity. Such componentsare commonly called “Electrostatically Sensitive(ES) Devices”, or ESDs. Examples of typicalESDs are: integrated circuits, some field effecttransistors, and semiconductor “chip” compo-nents.The techniques outlined below should be fol-lowed to help reduce the incidence of componentdamage caused by static electricity.CAUTION•Be sure no power is applied to the chassis orcircuit, and observe all other safety precau-tions.2. Before handling a semiconductor component orsemiconductor-equipped assembly, drain off anyelectrostatic charge on your body by using thestandard Xerox ESD protection kit, which shouldbe removed for your personal safety reasonsprior to applying power to the machine.3. After removing an electrical assembly equippedwith ESDs, place the assembly on the conduc-tive mat of the ESD kit, to prevent electrostaticcharge buildup in the vicinity of the assembly.4. Use only a grounded tip soldering iron to solderor de-solder ESDs.Use only an “anti-static” solder removal device.Some solder removal devices not classified as“anti-static” can generate electrical charges suffi-cient to damage ESDs.5. Do not use Freon-propelled chemicals. Whensprayed, these can generate electrical chargessufficient to damage ESDs.6. Do not remove a replacement ESD from its pro-tective packaging until immediately beforeinstalling it. Most replacement ESDs are pack-aged with all leads shorted together by conduc-tive foam, aluminum foil, or a comparableconductive material.7. Immediately before removing the protectiveshorting material from the leads of a replacementESD, touch the protective material to the chassisor circuit assembly into which the device will beinstalled.8. Maintain continuous electrical contact betweenthe ESD and the assembly into which it will beinstalled, until completely plugged or solderedinto the circuit.9. Minimize bodily motions when handling un-packed replacement ESDs. Normal motions,such as the brushing together of clothing fabricand lifting one’s foot from a carpeted floor, cangenerate static electricity sufficient to damage anESD.