Lenovo 1304XF8, T20x2-1, K1 manual Power system checkout, Checking the AC adapter

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General checkout

Power system checkout

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

•• “Checking the AC adapter ” on page 21

•• “Checking the battery pack ” on page 22

Checking the AC adapter

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

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

To check the AC adapter, follow the steps below:

1.Unplug the AC adapter cable from the tablet.

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

1

2

Pin

Voltage (V DC)

1+20

20

Note: Output voltage for the AC adapter pin No. 2 may differ 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:

•• Replace the system board.

•• If the problem continues, go to “Lenovo IdeaPad Tablet K1” on page 27. Note: Noise from the AC adapter does not always indicate a defect.

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Contents IdeaPad Tablet K1 First Edition May Copyright Lenovo 2011. All rights reserved Contents Lenovo IdeaPad Tablet K1 About this manualSafety information General safety Electrical safety IdeaPad Tablet K1 Hardware Maintenance Manual Safety inspection guide Grounding requirements Safety notice Safety notices multilingual translationsIdeaPad Tablet K1 Hardware Maintenance Manual Safety information IdeaPad Tablet K1 Hardware Maintenance Manual Safety information IdeaPad Tablet K1 Hardware Maintenance Manual Safety information Laser compliance statement Safety information Strategy for replacing FRUs Important service informationImportant notice for replacing a system board Strategy for replacing a hard disk driveImportant information about replacing RoHS compliant FRUs Important notes General checkoutWhat to do first Following are not covered under warrantyChecking the AC adapter Power system checkoutChecking the battery pack Restoring the factory contents by using OneKey Recovery Related service informationPower-on password PasswordsSupervisor password Screen blank mode Power managementSleep standby mode Hibernation mode Lenovo IdeaPad Tablet K1 SpecificationsIdeaPad Tablet K1 Hardware Maintenance Manual Screw notices FRU replacement noticesRemoving and replacing an FRU Removal steps of base cover Base coverIdeaPad Tablet K1 Hardware Maintenance Manual For access, remove this FRU Base cover on Battery packRemoval steps of middle cover Middle coverRemoval steps of docking bracker Docking bracketImportant notices for handling the system board System boardRemove the system board in the direction shown by arrow Removal steps of Switch board, SD board and Hdmi board Switch board, SD board and Hdmi boardM4.5 x 3 mm, flat-head, nylon-coated Silver IdeaPad Tablet K1 Hardware Maintenance Manual Removal steps of Speaker SpeakerRemoval steps of optical finger navigation OFN module Optical finger navigation OFN moduleRemoval steps of panel support bracket Panel support bracketRemoval steps of integrated camera Integrated cameraRemoval steps of antenna assembly Antenna assemblyFront view and Right-side view LocationsBottom and Left-side view Parts list Overall Parts list-Overall Miscellaneous parts Parts list-Miscellaneous partsAC adapters Parts list-3-pin AC adaptersPage Trademarks

K1, 1304XF8, T20x2-1 specifications

Lenovo has established a strong reputation in the tech world, and its range of devices continues to impress consumers with innovative features and technologies. In particular, models such as the Lenovo 1304XF8, T20x2-1, and K1 showcase the brand's commitment to delivering powerful performance and user-friendly design.

The Lenovo 1304XF8 is notable for its sleek design and portability. Equipped with a high-definition display, it offers vibrant visuals that enhance the user experience, whether one is engaging in multimedia consumption or professional tasks. The device features an Intel processor, ensuring smooth performance for multitasking and demanding applications. With ample storage capacity, it enables users to store a significant amount of data, from documents to media files, without worrying about running out of space.

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Finally, the Lenovo K1 is a remarkable tablet that combines performance with portability. Featuring a powerful processor and rich display with excellent color accuracy, it is perfect for gaming, streaming, and creative applications. The K1 comes equipped with a durable battery life, ensuring that users can stay connected and entertained throughout the day without worry. Furthermore, its lightweight design makes it an ideal companion for those on the go.

In conclusion, the Lenovo 1304XF8, T20x2-1, and K1 showcase the brand's focus on innovation, performance, and user-friendly features. With each model offering unique characteristics tailored to diverse needs, Lenovo continues to be a strong contender in the tech market, appealing to students, professionals, and casual users. Whether for work, entertainment, or creativity, these devices represent a robust solution that meets the demands of modern users while providing a seamless and enjoyable experience.
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