IBM R50 Series Hardware Maintenance Manual

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

Contents

FRU replacement noticesThis section contains notices related to removing andreplacing parts. Read this section carefully before replacingany FRU.Screw noticesLoose screws can cause a reliability problem. In the IBMThinkPad computer, this problem is addressed with specialnylon-coated screws that have the following characteristics:v They maintain tight connections.v They do not easily come loose, even with shock orvibration.v They are harder to tighten.v Each one should be used only once.Do the following when you service this machine:v Keep the screw kit (for the P/N, see “Miscellaneousparts” on page 265) in your tool bag.v Always use new screws.v Use a torque screwdriver if you have one.Tighten screws as follows:v Plastic to plasticTurn an additional 90 degrees after the screw headtouches the surface of the plastic part:90 degrees more(Cross-section)v Logic card to plasticTurn an additional 180 degrees after the screw headtouches the surface of the logic card:180 degrees more(Cross-section)v Torque driverIf you have a torque driver, refer to the “Torque” columnfor each step.FRU replacement noticesThinkPad R50/R50p and R51 Series 63