Samsung GS17VSSB Service Manual

Also see for SyncMaster 710M: User manual User manual User manual Manual de usuario

Contents

1-2-1 General Servicing Precautions1. Always unplug the unit’s AC power cord from theAC power source and disconnect the DC PowerJack before attempting to:(a) remove or reinstall any component or assembly,(b) disconnect PCB plugs or connectors, (c) connecta test component in parallel with an electrolyticcapacitor.2. Some components are raised above the printedcircuit board for safety. An insulation tube or tapeis sometimes used. The internal wiring issometimes clamped to prevent contact withthermally hot components. Reinstall all suchelements to their original position.3. After servicing, always check that the screws,components and wiring have been correctlyreinstalled. Make sure that the area around theserviced part has not been damaged.1. Immediately before handling any semiconductorcomponents or assemblies, drain the electrostaticcharge from your body by touching a known earthground. Alternatively, wear a discharging wrist-strap device. To avoid a shock hazard, be sure toremove the wrist strap before applying power tothe monitor.2. After removing an ESD-equipped assembly, place iton a conductive surface such as aluminum foil toprevent accumulation of an electrostatic charge.3. Do not use freon-propelled chemicals. These cangenerate electrical charges sufficient to damageESDs.4. Use only a grounded-tip soldering iron to solder ordesolder ESDs.5. Use only an anti-static solder removal device. Somesolder removal devices not classified as “anti-static”can generate electrical charges sufficient to damageESDs.4. Check the insulation between the blades of the ACplug and accessible conductive parts (examples:metal panels, input terminals and earphone jacks).5. Insulation Checking Procedure: Disconnect thepower cord from the AC source and turn the powerswitch ON. Connect an insulation resistance meter(500 V) to the blades of the AC plug.The insulation resistance between each blade of theAC plug and accessible conductive parts (seeabove) should be greater than 1 megohm.6. Always connect a test instrument’s ground lead tothe instrument chassis ground before connectingthe positive lead; always remove the instrument’sground lead last.6. Do not remove a replacement ESD from itsprotective package until you are ready to install it.Most replacement ESDs are packaged with leadsthat are electrically shorted together by conductivefoam, aluminum foil or other conductive materials.7. Immediately before removing the protectivematerial from the leads of a replacement ESD,touch the protective material to the chassis orcircuit assembly into which the device will beinstalled.Caution: Be sure no power is applied to thechassis or circuit and observe allother safety precautions.8. Minimize body motions when handlingunpackaged replacement ESDs. Motions such asbrushing clothes together, or lifting your foot froma carpeted floor can generate enough staticelectricity to damage an ESD.1 Precautions1-2 GS17VS/GS17VT/GS19VS/GS19VT/GS15MS/GS17MS/GS19MS1-3 Electrostatically Sensitive Devices (ESD) PrecautionsSome semiconductor (solid state) devices can be easily damaged by static electricity. Such components are commonlycalled Electrostatically Sensitive Devices (ESD). Examples of typical ESD are integrated circuits and some field-effecttransistors. The following techniques will reduce the incidence of component damage caused by static electricity.1-2 Servicing PrecautionsWARNING: An electrolytic capacitor installed with the wrong polarity might explode.Caution: Before servicing units covered by this service manual, read and follow the Safety Precautionssection of this manual.Note: If unforeseen circumstances create conflict between the following servicing precautions and any of thesafety precautions, always follow the safety precautions.