Xerox phaser 3635 Service Manual

Also see for PHASER 3635: User guide System administration guide Service manual

Contents

Xerox phaser 3635 Service Manual Manual pdf 4 page image

iv Phaser 3635MFPSafety PrecautionsDraft 4IntroductionSafety PrecautionsFollow these safety, ESD, and servicing precautions to prevent personal injury and equipmentdamage.1. Ensure that all built in protective devices are in place. Restore any missing protectiveshields.2. Make sure there are no cabinet openings through which people, particularly children,might insert fingers or objects and contact dangerous voltages.3. When re-installing chassis and assemblies, be sure to restore all protective devices,including control knobs and compartment covers.4. Design alteration warning; never alter or add to the mechanical or electrical design of thisequipment, such as auxiliary connectors, etc. Such alterations and modifications will voidthe manufacturers warranty.5. Components, parts, and wiring that appear to have overheated or are otherwise damagedshould be replaced with parts which meet the original specifications. Always determinethe cause of damage or overheating, and correct any potential hazards.6. Observe the original harness routing, especially near sharp edges, AC, and high voltagepower supplies. Always inspect for pinched, out-of-place, or frayed wiring. Do not changethe spacing between components and the printed circuit board.7. Product safety notice; some electrical and mechanical parts have special safety relatedcharacteristics which might not be obvious from visual inspection. These safety featuresand the protection they provide could be lost if a replacement component differs from theoriginal. This holds true, even though the replacement may be rated for higher voltage,wattage, etc.8. Use only replacement components that have the same ratings, especially for flame resis-tance and dielectric specifications. A replacement part that does not have the same safetycharacteristics as the original may create shock, fire, or other safety hazards.ESD Precautions1. Certain semiconductor devices can be easily damaged by static electricity. Such compo-nents are commonly called ‘Electrostatically Sensitive (ES) Devices’, or ESDs. Examplesof typical ESDs are: integrated circuits, some field effect transistors, and semiconductor‘chip’ components.The techniques outlined below should be followed to help reduce the incidence of compo-nent damage caused by static electricity.CAUTIONEnsure no power is applied to the chassis or circuit, and observe all other safety precautions.2. Immediately before handling a semiconductor component or semiconductor-equippedassembly, discharge any electrostatic charge on your body by touching a known earthground. Alternatively, employ a commercially available wrist strap device, which shouldbe removed for your personal safety reasons prior to applying power to the unit undertest.3. After removing an electrical assembly equipped with ESDs, place the assembly on a con-ductive surface, such as aluminum or copper foil, or conductive foam, to prevent electro-static charge buildup in the vicinity of the assembly.4. Use only a grounded tip soldering iron to solder or desolder ESDs.Use only an ‘anti-static’ solder removal device. Some solder removal devices not classi-fied as ‘anti-static’ can generate electrical charges sufficient to damage ESDs.5. Do not use freon propelled chemicals. When sprayed, these can generate electricalcharges sufficient to damage ESDs.6. Do not remove a replacement ESD from its protective packaging until immediately beforeinstalling it. Most replacement ESDs are packaged with all leads shorted together by con-ductive foam, aluminum foil, or a comparable conductive material.7. Immediately before removing the protective shorting material from the leads of a replace-ment ESD, touch the protective material to the chassis or circuit assembly into which thedevice will be installed.8. Maintain continuous electrical contact between the ESD and the assembly into which itwill be installed, until completely plugged or soldered into the circuit.9. Minimize body motion when handling unpacked replacement ESDs. Normal motions,such as the brushing together of clothing fabric and lifting a foot from a carpeted floor, cangenerate static electricity sufficient to damage an ESD.Lithium Battery Precautions1. Exercise caution when replacing a lithium battery. There could be a danger of explosionand subsequent operator injury and/or equipment damage if incorrectly installed.2. Be sure to replace the battery with the same or equivalent type recommended by themanufacturer.3. Lithium batteries contain toxic substances and should not be opened, crushed, or burnedfor disposal.4. Dispose of used batteries according to the manufacture’s instructions.