Dell NOT22106 Owner's Manual

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The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded")failure.Perform the following steps to prevent ESD damage:● Use a wired ESD wrist strap that is properly grounded. The use of wireless anti-static straps is no longer allowed; they do notprovide adequate protection. Touching the chassis before handling parts does not ensure adequate ESD protection on partswith increased sensitivity to ESD damage.● Handle all static-sensitive components in a static-safe area. If possible, use anti-static floor pads and workbench pads.● When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti-staticpacking material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that youdischarge static electricity from your body.● Before transporting a static-sensitive component, place it in an anti-static container or packaging.ESD field service kitThe unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components:anti-static mat, wrist strap, and bonding wire.Components of an ESD field service kitThe components of an ESD field service kit are:● Anti-Static Mat – The anti-static mat is dissipative and parts can be placed on it during service procedures. When using ananti-static mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metalon the system being worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directlyon the mat. ESD-sensitive items are safe in your hand, on the ESD mat, in the system, or inside a bag.● Wrist Strap and Bonding Wire – The wrist strap and bonding wire can be either directly connected between your wristand bare metal on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware thatis temporarily placed on the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESDmat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Neveruse wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone to damage from normal wearand tear, and must be checked regularly with a wrist strap tester in order to avoid accidental ESD hardware damage. It isrecommended to test the wrist strap and bonding wire at least once per week.● ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitoredkit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. Awrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with yourregional office to find out if they have one. To perform the test, plug the wrist-strap's bonding-wire into the tester while it isstrapped to your wrist and push the button to test. A green LED is lit if the test is successful; a red LED is lit and an alarmsounds if the test fails.● Insulator Elements – It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal partsthat are insulators and often highly charged.● Working Environment – Before deploying the ESD Field Service kit, assess the situation at the customer location. Forexample, deploying the kit for a server environment is different than for a desktop or portable environment. Servers aretypically installed in a rack within a data center; desktops or portables are typically placed on office desks or cubicles. Alwayslook for a large open flat work area that is free of clutter and large enough to deploy the ESD kit with additional space toaccommodate the type of system that is being repaired. The workspace should also be free of insulators that can cause anESD event. On the work area, insulators such as Styrofoam and other plastics should always be moved at least 12 inches or30 centimeters away from sensitive parts before physically handling any hardware components● ESD Packaging – All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shieldedbags are preferred. However, you should always return the damaged part using the same ESD bag and packaging that thenew part arrived in. The ESD bag should be folded over and taped shut and all the same foam packing material should beused in the original box that the new part arrived in. ESD-sensitive devices should be removed from packaging only at anESD-protected work surface, and parts should never be placed on top of the ESD bag because only the inside of the bag isshielded. Always place parts in your hand, on the ESD mat, in the system, or inside an anti-static bag.● Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or partsto be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.28 Working inside your computer