Lenovo B575E FRU replacement notices, Screw notices, Plastic to plastic, Logic card to plastic

Page 47

Chapter 6. FRU replacement notices

This chapter presents notices related to removing and replacing parts. Read this chapter carefully before replacing any FRU.

Screw notices

Loose screws can cause a reliability problem. In the Lenovo notebook computer, this problem is addressed with special nylon-coated screws that have the following characteristics:

They maintain tight connections.

They do not easily come loose, even with shock or vibration.

They are harder to tighten.

Do the following when you service the computer:

Keep the screw kit in your tool bag.

It is recommended to use new screws.

It recommended to use each screw only once.

Use a torque screwdriver if you have one.

Tighten screws as follows:

Plastic to plastic

Turn an additional 90 degrees after the screw head touches the surface of the plastic part.

Logic card to plastic

Turn an additional 180 degrees after the screw head touches the surface of the logic card.

Torque driver

If you have a torque screwdriver, refer to the Torque column in the screw information table for each step.

Ensure that you use the correct screw. It is recommended to use new screws for replacements. If you have a torque screwdriver, tighten all screws firmly to the torque specified in the screw information table for each step.

Ensure that torque screw drivers are calibrated correctly following country specifications.

© Copyright Lenovo 2012

41

Image 47
Contents Lenovo B575e Hardware Maintenance ManualFirst Edition July Copyright Lenovo Contents Ii Hardware Maintenance Manual About this manual Iv Hardware Maintenance Manual General safety Safety informationElectrical safety Safety inspection guide Grounding requirements Safety notices multilingual translationsSafety information Hardware Maintenance Manual Safety information Perigo Perigo Vorsicht Vorsicht Vorsicht Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Laser compliance statement multilingual translations Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Strategy for replacing FRUs Important service informationBefore replacing parts For products shipped after June Strategy for replacing a hard disk driveImportant notice for replacing a system board Important information about replacing RoHS compliant FRUsWhat to do first Following are not covered under warrantyGeneral checkout Checking the ac power adapter Power system checkoutChecking operational charging Checking the battery packHardware Maintenance Manual Power-on password Related service informationRecovering the computer settings PasswordsHibernation mode Power managementScreen blank mode Sleep modeRelated service information Hardware Maintenance Manual Specifications Indicator Meaning Status indicatorsKey combination Description Fn key combinationsHardware Maintenance Manual Logic card to plastic FRU replacement noticesScrew notices Plastic to plasticHardware Maintenance Manual Removing and replacing a FRU Battery packRemoval steps of bottom slot cover Bottom slot coverHard disk drive Removal steps of hard disk drive assemblyRemoval steps of the optical drive Optical driveRemoval steps of hard disk drive bracket Memory modules Removal steps of memory modules PCI Express Mini Card for wireless LANRemoval steps of PCI Express Mini Card for wireless LAN Backup battery Keyboard Removal steps of keyboard Keyboard will open up slightly Keyboard bezel Remove screws That secure the keyboard bezel Removal steps of keyboard bezelM2 × 5 mm, flat-head, nylon-coated Black Kgfcm Removing and replacing a FRU Removal steps of LED board LED board and power boardRemoval steps of power board 1120 I/O board and RJ45 Ethernet board Microphone assemblyRemoval steps of microphone assembly Removal steps of I/O board Remove the I/O board Removal steps of RJ45 Ethernet board Important notices for handling the system board System board assemblyRemoval steps of system board LCD unit Removal steps of LCD unit When installingThermal fan assembly Removal steps of thermal fan assembly Speaker assembly DC-in sub card and base cover Removal steps of speaker assemblyRemoval steps of DC-in sub card Applying labels to the base cover LCD front bezelRemoval steps of LCD front bezel Removal steps of integrated camera Integrated cameraLCD panel, LCD cable, and hinges Removal steps of LCD panel and hinges Removal steps of LCD cable Antenna assemblyRemoval steps of antenna assembly Removing and replacing a FRU Hardware Maintenance Manual Front view LocationsLenovo B575e bottom view Bottom viewParts list FRU Overall FRU no OverallLA57 HDD Door Assy LCD FRUs FRU Parts list Keyboard Sunrex Parts list Keyboard Chicony Miscellaneous parts Ac power adaptersPower cords Country or region FRU no Parts list 3-pin power cords Volex Country or region FRU no Hardware Maintenance Manual Appendix A. Notices Trademarks Electronic emissions noticesPage Part Number 1P P/N

B575E specifications

The Lenovo B575E is a reliable and cost-effective laptop designed primarily for business users and students who need a dependable device for everyday tasks. It brings a solid mix of performance, portability, and essential features that cater to the needs of individuals on a budget.

At its core, the B575E is powered by AMD's E-series processors, which provide adequate performance for handling basic computing tasks like web browsing, document editing, and multimedia consumption. This entry-level configuration is perfect for users who do not require intensive graphics capabilities or high-end processing power.

One of the standout features of the Lenovo B575E is its 15.6-inch display. The screen boasts a resolution of 1366 x 768 pixels, which while standard, offers decent clarity and brightness for everyday usage. The anti-glare technology reduces reflections and allows users to work comfortably in various lighting conditions.

In terms of memory, the B575E typically comes with 4 GB of RAM, which is expandable for users who require additional multitasking capabilities. With a standard hard drive capacity, users can choose models with up to 500 GB of storage, providing sufficient space for documents, applications, and media files.

The design of the B575E is pragmatic and functional, featuring a sturdy casing that can withstand regular use. Weighing around 5.5 pounds, it is portable enough for users who need to carry their laptops to meetings or classes.

Connectivity options are user-friendly, as the laptop includes USB 2.0 and USB 3.0 ports, HDMI output, and an SD card reader, enabling users to connect various peripherals and external displays easily. The built-in webcam and microphone support video conferencing, a feature that has become increasingly important in today’s remote work and education environments.

The battery life of the Lenovo B575E is commendable, providing several hours of productivity on a single charge, which is essential for users who are frequently on the move.

Overall, the Lenovo B575E stands out as a practical choice for budget-conscious consumers looking for a functional laptop that meets the basic demands of everyday computing without sacrificing performance. With its reliable construction, satisfactory specifications, and essential features, it remains a competitive option in the entry-level laptop market.