Lenovo 300e Chromebook 2nd Gen, Hardware Maintenance Manual

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Contents
About this documentation . . . . . . . . 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 checkout . . . . . 21
What to do first . . . . . . . . . . . . . . . 21
Checking the ac power adapter
. . . . . . . . 22
Chapter 3. Create and use 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
LCD 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
Disassemble the LCD module . . . . . . . . . 44
Remove the LCD panel . . . . . . . . . . 44
Remove the front camera and the LCD
cable . . . . . . . . . . . . . . . . . 47
Remove the hinges. . . . . . . . . . . . 48
Appendix A. Features, controls, and
connectors . . . . . . . . . . . . . . . 51
Appendix B. Label locations . . . . . 53
Trademarks . . . . . . . . . . . . . . . . . lv
© Copyright Lenovo 2019
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