•“1100 Keyboard bezel assembly” on page 75

•“1110 Bluetooth daughter card (BDC-3.0)” on page 77

•“1120 Backup battery” on page 78

•“1130 Smart Card or Smart Card dummy spacer” on page 79

•“1140 Speaker assembly” on page 81

•“1150 Thermal module” on page 83

•“1160 CPU” on page 85

•“1170 LCD unit” on page 86

•“1180 Base cover assembly” on page 89

•“1190 I/O sub card” on page 91

Important notices for RAID setting:

Before you replace the system board, make sure that you read Chapter 5 “Installing and configuring RAID” on page 45, and have the necessary information. After you replaced the system board, RAID mode is recovered as default. To confirm the SATA mode setting, you can see the setting in ThinkPad Setup menu as follows:

Config ➙ Serial ATA (SATA) ➙ SATA Controller Mode Option ➙ RAID/Compatibility/AHCI

Important notices for handling the system board:

When handling the system board, bear the following in mind.

•The system board has an accelerometer, which can be broken by applying several thousands of G-forces.

Note: Dropping a system board from a height of as little as 6 inches so that it falls flat on a hard bench can subject the accelerometer to as much as 6,000 G's of shock.

•Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or composite.

•If a system board is dropped, you must test it, using PC-Doctor for DOS, to make sure that the HDD Active Protection still functions (see below).

Note: If the test shows that HDD Active Protection is not functioning, be sure to document the drop in any reject report, and replace the system board.

•Avoid rough handling of any kind.

•At every point in the process, be sure not to drop or stack the system board.

•If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or conductive corrugated material.

After replacing the system board, run PC-Doctor for DOS to make sure that HDD Active Protection still functions. The procedure is as follows:

1.Place the computer on a horizontal surface.

2.Run Diagnostics ➙ ThinkPad Devices ➙ HDD Active Protection Test. Attention: Do not apply physical shock to the computer while the test is running.

Table 34. Location of major sensitive components on the system board

Following components soldered on the top side of the system board are extremely sensitive. When you service the system board, avoid any kind of rough handling.

b

d

CPU

Accelerometer chip for the HDD Active Protection System™

PCH (Platform Controller Hub)

Graphics

Note: d (Graphics) is only for the Switchable Graphics models and Workstation models. The system board in Integrated Graphics models does not have this chip.

Chapter 9. Removing and replacing a FRU 93

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Lenovo W520, 4284WW9PC10B371, T520 manual Important notices for RAID setting, Important notices for handling the system board
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T520, W520, 4284WW9PC10B371, T520i specifications

The Lenovo T520i is a robust business laptop that caters to professionals seeking reliability and performance. Part of Lenovo's ThinkPad series, specifically the model number 4284WW9PC10B371, it is designed for multitasking efficiency and mobility.

One of the defining features of the T520i is its impressive performance capabilities. It is equipped with Intel's second-generation Core processors, ranging from i5 to i7, which provide ample power for demanding applications and multitasking scenarios. This model supports up to 16GB of RAM, ensuring smooth operation even with multiple applications running simultaneously.

The T520i features a 15.6-inch high-definition display, offering users a resolution of 1366 x 768 pixels. For those who require superior screen clarity and vibrant color reproduction, the laptop can be upgraded to a Full HD (1920 x 1080) display option. This attribute is especially valuable for professionals working in design or media fields who need precise visuals.

Another characteristic that sets the T520i apart is its durable build quality. As a ThinkPad, it has undergone rigorous testing to meet military-grade standards for durability and reliability. The spill-resistant keyboard and robust chassis are designed to withstand the rigors of everyday use, making it ideal for professionals on the go.

Storage options for the T520i are versatile, with configurations available for traditional hard drives and solid-state drives (SSD). The SSD option not only enhances the overall speed of the system but also improves boot times and application loading, significantly contributing to productivity.

Connectivity options on the T520i are comprehensive. It comes with multiple USB ports, including USB 3.0 for fast data transfer. Additionally, integrated features such as a Gigabit Ethernet port, VGA output for external monitors, and optional 4G LTE connectivity ensure seamless communication and access to networks.

The laptop also boasts Intel HD Graphics, offering sufficient power for everyday tasks, video playback, and light gaming. Furthermore, the inclusion of technologies such as Bluetooth and an integrated webcam enriches user experience through enhanced connectivity and multimedia capabilities.

In conclusion, the Lenovo T520i, with its powerful processors, impressive display options, and rugged design, is a capable choice for professionals who require a reliable, high-performance laptop. Ideal for both business and personal use, it exemplifies Lenovo’s commitment to quality and innovation in the laptop market.
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