IBM ThinkPad Dock II Hardware Maintenance Manual

Also see for ThinkPad Dock II: Manual Hardware Maintenance Manual User guide Manual User guide

Contents

Safety inspection guideThe purpose of this inspection guide is to assist you inidentifying potentially unsafe conditions. As each machinewas designed and built, required safety items wereinstalled to protect users and service personnel from injury.This guide addresses only those items. You should usegood judgment to identify potential safety hazards due toattachment of non-IBM features or options not covered bythis inspection guide.If any unsafe conditions are present, you must determinehow serious the apparent hazard could be and whetheryou can continue without first correcting the problem.Consider these conditions and the safety hazards theypresent:v Electrical hazards, especially primary power (primaryvoltage on the frame can cause serious or fatalelectrical shock)v Explosive hazards, such as a damaged CRT face or abulging capacitorv Mechanical hazards, such as loose or missing hardwareTo determine whether there are any potentially unsafeconditions, use the following checklist at the beginning ofevery service task. Begin the checks with the power off,and the power cord disconnected.Checklist:1. Check exterior covers for damage (loose, broken, orsharp edges).2. Power off the computer. Disconnect the power cord.3. Check the power cord for:a. A third-wire ground connector in good condition.Use a meter to measure third-wire groundcontinuity for 0.1 ohm or less between the externalground pin and the frame ground.b. The power cord should be the type specified in theparts list.c. Insulation must not be frayed or worn.4. Remove the cover.5. Check for any obvious non-IBM alterations. Use goodjudgment as to the safety of any non-IBM alterations.6. Check inside the unit for any obvious unsafeconditions, such as metal filings, contamination, wateror other liquids, or signs of fire or smoke damage.7. Check for worn, frayed, or pinched cables.Safety informationIntroduction 19