Lenovo 21JJ Manuals

Manuals and User Guides for Lenovo 21JJ. We have 1 Lenovo 21JJ manual available for free PDF download: Hardware Maintenance Manual

Lenovo 21JJ Hardware Maintenance Manual

Lenovo 21JJ Hardware Maintenance Manual (54 pages)

Brand: Lenovo | Category: Laptop | Size: 24.56 MB

Table of Contents

Table of Contents
3
About this Manual
5
Chapter 1. Safety Information

7
Chapter 2. General Checkout

27
- What to Do First
  27
- CRU List
  28
Chapter 3. Identifying Frus (Crus)

29
- Locate Frus and Crus
  29
Chapter 4. Removing a FRU or CRU

31
- Service Tools
  31
- General Guidelines
  31
- Remove the Lower Case
  32
- Remove the Battery Pack
  33
- Remove the Solid-State Drive
  34
- Remove the Speakers
  36
- Remove the Heat Sink
  37
- Remove the Fans
  38
- Remove the EDP Cable Brackets
  39
- Remove the Audio Board Cable
  39
- Remove the Fingerprint Cable
  40
- Remove the Touchpad Cable
  41
- Remove the System Board
  42
- Use a Golden Key U1 Tool to Flash-Write Key ID Information
  43
- Remove the Fingerprint Frame
  43
- Remove the Fingerprint Module
  44
- Remove the LCD Module
  45
- Remove the Upper Case (with Keyboard)
  47
Appendix A. Label Locations

49
- Trademarks
  51

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