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Lenovo 27763DU, 27763PU, 27763CU Power system checkout, Checking the AC adapter, Pin Voltage V dc

Models: 27763CU 27763DU 27763PU

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Power system checkout

To verify a symptom, do the following:

1.Turn off the computer.

2.Remove the battery pack.

3.Connect the ac adapter.

4.Check that power is supplied when you turn on the computer.

5.Turn off the computer.

6.Disconnect the ac adapter and install the charged battery pack.

7.Check that the battery pack supplies power when you turn on the computer.

If you suspect a power problem, see the appropriate one of the following power supply checkouts:

v“Checking the AC adapter”

v“Checking operational charging” on page 30

v“Checking the battery pack” on page 30

v“Checking the backup battery” on page 31

Checking the AC adapter

You are here because the computer fails only when the AC adapter is used.

vIf the power-on indicator does not turn on, check the power cord of the AC adapter for correct continuity and installation.

vIf the computer does not charge during operation, go to “Checking operational charging” on page 30

To check the AC adapter, do the following:

1.Unplug the AC adapter cable from the computer.

2.Measure the output voltage at the plug of the AC adapter cable. See the following figure:

3

2

1

(20V)

Pin

Voltage (V dc)

1+20

20

3Ground

Note: Output voltage of pin no.2 of the AC adapter may different from the one you are servicing.

3.If the voltage is not correct, replace the AC adapter.

4.If the voltage is acceptable, do the following: v Replace the system board.

vIf the problem persists, go to “ThinkPad X301” on page 47.

Note: Noise from the AC adapter does not always indicate a defect.

General checkout 29

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Lenovo 27763DU, 27763PU, 27763CU manual Power system checkout, Checking the AC adapter, Pin Voltage V dc
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27763CU, 27763DU, 27763PU specifications

The Lenovo models 27763PU, 27763DU, and 27763CU are part of the highly regarded ThinkPad series, known for their robustness and performance in business environments. Each of these laptops embodies Lenovo's commitment to delivering high-quality devices that cater to various user needs, from professionals to students.

The Lenovo 27763PU features a 14-inch display with Full HD resolution, providing crisp visuals ideal for work and multimedia. This model is powered by an Intel Core i5 processor, ensuring smooth multitasking and efficient performance across demanding applications. With up to 16GB of RAM and a fast SSD for storage, users can expect quick boot times and rapid file access. The laptop's lightweight design makes it portable, suitable for on-the-go professionals.

In contrast, the 27763DU and 27763CU models offer enhanced features for users who require even more power and versatility. The 27763DU is equipped with similar impressive display specifications but boasts an upgraded Intel Core i7 processor and an optional discrete graphics card, making it perfect for tasks such as graphic design or video editing. This model supports higher RAM configurations, allowing heavy multitasking without compromising performance.

The Lenovo 27763CU builds on the strengths of its predecessors by incorporating advanced technologies that enhance user experience. This model includes Lenovo's unique Rapid Charge technology, which allows the battery to charge quickly, offering hours of usage from just a short charging session. The inclusion of a backlit keyboard ensures productivity in low-light environments, while the precision touchpad and optional touchscreen display provide intuitive navigation and interaction.

All three models prioritize security and durability, featuring a robust chassis resistant to wear and tear. They come equipped with fingerprint readers, ensuring secure access to data and applications. Additionally, the ThinkShield security platform offers comprehensive protection for sensitive information, making these devices suitable for corporate standards.

In summary, the Lenovo 27763PU, 27763DU, and 27763CU deliver impressive performance, cutting-edge features, and a focus on security, appealing to a diverse range of users. Whether for business, education, or personal use, these laptops stand out as excellent choices for those looking for reliability and efficiency.