Lenovo b50-30, 59-426189 [10/88] Handling devices that are sensitive to electrostatic discharge

Lenovo B50-30/B50-30 Touch/B50-45/ B50-70

Hardware Maintenance Manual

Anycomputerpartcontainingtransistorsorintegratedcircuits(ICs)shouldbe

consideredsensitivetoelectrostaticdischarge(ESD).ESDdamagecanoccur

whenthereisadifferenceinchargebetweenobjects.ProtectagainstESDdamage

byequalizingthechargesothatthemachine,thepart,theworkmat,andthe

personhandlingthepartareallatthesamecharge.

WhenhandlingESD‐sensitiveparts:

• Keepthepartsinprotectivepackagesuntiltheyareinsertedintotheproduct.

• Avoidcontactwithotherpeople.

• Wearagroundedwriststrapagainstyourskintoeliminatestaticonyour

body.

• Preventthepartfromtouchingyourclothing.Mostclothingisinsulativeand

retainsachargeevenwhenyouarewearingawriststrap.

• Usetheblacksideofagroundedworkmattoprovideastatic‐freework

surface.ThematisespeciallyusefulwhenhandlingESD‐sensitivedevices.

• Selectagroundingsystem,suchasthoselistedbelow,toprovideprotection

thatmeetsthespecificservicerequirement.

– AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen‐

wireground.

– Whenworkingonadouble‐insulatedorbattery‐operatedsystem,usean

ESDcommongroundorreferencepoint.Youcanusecoaxorconnector‐

outsideshellsonthesesystems.

– Usetheroundgroundprongoftheacplugonac‐operatedcomputers.

Electricalgroundingofthecomputerisrequiredforoperatorsafetyandcorrect

systemfunction.Propergroundingoftheelectricaloutletcanbeverifiedbya

certifiedelectrician.

Handling devices that are sensitive to electrostatic discharge

Notes:

1. Useproduct‐specificESDprocedureswhentheyexceedthe

requirementsnotedhere.

2. MakesurethattheESDprotectivedevicesyouusehavebeencertified

(ISO9000)asfullyeffective.

Notes:

TheuseofagroundingsystemtoguardagainstESDdamageisdesirablebut

notnecessary.

Grounding requirements