ThinkPad Hardware Maintenance Manual: Chapter 9 - Removing and Replacing FRU - Requirement: M2 x 2.5mm, Flat Head, Nylon-coated Screw (0.181Nm)
In this chapter of the ThinkPad Hardware Maintenance Manual, we will discuss the process of removing and replacing FRU (Field Replaceable Unit) components using a specific screw type. The screw required for this procedure is an M2 x 2.5mm, flat head, nylon-coated screw with a torque requirement of 0.181Nm (1.85kgf-cm).
Screw Specifications
The screw required for this procedure is a metric screw with an M2 x 2.5mm thread size. The head of the screw is flat, which allows it to sit flush against the surface of the FRU component. The nylon coating on the screw provides a secure grip and helps prevent damage to the component during installation or removal.
The torque requirement for this screw is 0.181Nm (1.85kgf-cm). This is an important specification to follow, as over-tightening the screw can damage the component, while under-tightening can result in the screw coming loose over time.
Tools Required
To perform this procedure, you will need the following tools:
- M2 x 2.5mm, flat head, nylon-coated screw
- Screwdriver with a matching flat head
- Torque wrench (if available) to ensure the correct torque is applied to the screw
Procedure
To remove or replace an FRU component using the M2 x 2.5mm, flat head, nylon-coated screw, follow these steps:
- Identify the FRU component that needs to be removed or replaced.
- Locate the screw(s) holding the component in place. In most cases, there will be multiple screws securing the component.
- Using the appropriate screwdriver, remove the screw(s) from the component. Be sure to keep track of the screws and their locations, as they may be different lengths or thread pitches.
- Carefully lift the component out of its housing, being mindful of any cables or connectors that may be attached.
- To install a new FRU component, position it in the housing and align the screw holes.
- Insert the M2 x 2.5mm, flat head, nylon-coated screw(s) into the component and tighten them to the specified torque of 0.181Nm (1.85kgf-cm).
- Reconnect any cables or connectors and ensure the component is properly seated in its housing.
In this article, we have covered the process of removing and replacing FRU components using an M2 x 2.5mm, flat head, nylon-coated screw with a torque requirement of 0.181Nm (1.85kgf-cm). By following the steps outlined in this procedure, you can ensure that your ThinkPad hardware maintenance is performed correctly and safely.