Lenovo 300e Chromebook 2nd Gen Owner's manual

Hardware Maintenance Manual
Lenovo 300e/500e Chromebook 2nd Gen

First Edition (March 2019)
© Copyright Lenovo 2019.
LIMITE AN RESTRICTE RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-
35F-05925.

Contents
Abo t this doc mentation . . . . . . . . iii
Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 1
Safety inspection guide . . . . . . . . . . . . . 2
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . . . . . . 3
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multilingual translations) . . . . . . 4
Chapter 2. General checko t . . . . . 21
What to do first . . . . . . . . . . . . . . . 21
Checking the ac power adapter . . . . . . . . 22
Chapter 3. Create and se a USB
repair shim . . . . . . . . . . . . . . . 23
What is a USB repair shim? . . . . . . . . . . 23
Create a repair shim . . . . . . . . . . . . . 23
Use a USB repair shim to diagnose and fix
problems . . . . . . . . . . . . . . . . . 23
Factory test items . . . . . . . . . . . . 24
Chapter 4. Identifying FRUs
(CRUs) . . . . . . . . . . . . . . . . . 27
Locating FRUs and CRUs . . . . . . . . . . . 27
Major FRUs and CRUs . . . . . . . . . . 28
LC FRUs and CRUs . . . . . . . . . . . 30
Miscellaneous parts . . . . . . . . . . . 31
Looking up FRU information . . . . . . . . . . 31
Chapter 5. Removing a FRU or
CRU . . . . . . . . . . . . . . . . . . 33
General guidelines. . . . . . . . . . . . . . 33
Cut off the power supply from the built-in battery
pack . . . . . . . . . . . . . . . . . . . 33
Remove the Stylus Pen . . . . . . . . . . . . 34
Remove the lower case . . . . . . . . . . . . 34
Remove the battery pack . . . . . . . . . . . 35
Remove the wireless module. . . . . . . . . . 37
Remove the speakers . . . . . . . . . . . . 38
Remove the power board . . . . . . . . . . . 39
Remove the system board. . . . . . . . . . . 41
Remove the WorldFacing camera (for selected
models) . . . . . . . . . . . . . . . . . . 42
Remove the upper case (with keyboard) . . . . . 43
isassemble the LC module . . . . . . . . . 44
Remove the LC panel . . . . . . . . . . 44
Remove the front camera and the LC
cable . . . . . . . . . . . . . . . . . 47
Remove the hinges. . . . . . . . . . . . 48
Appendix A. Feat res, controls, and
connectors . . . . . . . . . . . . . . . 51
Appendix B. Label locations . . . . . 53
Trademarks . . . . . . . . . . . . . . . . . lv
© Copyright Lenovo 2019 i

ii Hardware Maintenance Manual

Abo t this doc mentation
• Illustrations in this documentation might look different from your product.
• epending on the model, some optional accessories, features, and software programs might not be
available on your computer.
• epending on the version of operating systems, some user interface instructions might not be applicable
to your computer.
• ocumentation content is subject to change without notice. Lenovo makes constant improvements on the
documentation of your computer, including this Hardware Maintenance Manual. To get the latest
documentation, go to https://support.lenovo.com.
• This documentation applies to the following product models.
Model name Machine type
Lenovo 300e Chromebook 2nd Gen 81MB
Lenovo 500e Chromebook 2nd Gen 81MC
• To improve readability, this manual commonly takes Lenovo 500e Chromebook 2nd Gen as an example.
© Copyright Lenovo 2019 iii