Lenovo Yoga C740 Series, Hardware Maintenance Manual

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Contents
About this manual . . . . . . . . . . . . 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
CRU list . . . . . . . . . . . . . . . . . . 22
Chapter 3. Identifying FRU (CRU) . . . 23
Locate FRU and CRU . . . . . . . . . . . . 23
Chapter 4. Removing a FRU or
CRU . . . . . . . . . . . . . . . . . . 25
Service tools . . . . . . . . . . . . . . . . 25
General guidelines. . . . . . . . . . . . . . 25
Remove the lower case . . . . . . . . . . . . 26
Remove the battery pack . . . . . . . . . . . 27
Remove the RTC battery . . . . . . . . . . . 28
Remove the thermal module . . . . . . . . . . 29
Remove the I/O board with cable . . . . . . . . 31
Remove the WLAN card . . . . . . . . . . . 33
Remove the solid-state drive. . . . . . . . . . 35
Remove the system board. . . . . . . . . . . 36
Remove the speakers . . . . . . . . . . . . 38
Remove the audio board . . . . . . . . . . . 39
Remove the upper case (with keyboard) . . . . . 40
Remove the LCD panel . . . . . . . . . . . . 42
Remove the camera and MIC board . . . . . . . 45
Remove the hinges . . . . . . . . . . . . . 46
Remove the EDP cable and FFC . . . . . . . . 48
Trademarks . . . . . . . . . . . . . . . . . li
© Copyright Lenovo 2019
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