Table Of Contents - Lenovo B490 Hardware Maintenance Manual

Contents
About this manual. . . . . . . . . . .
Chapter 1. Safety information . . . . .
General safety . . . . . . . . . . . . . . .
Electrical safety . . . . . . . . . . . . . .
Safety inspection guide . . . . . . . . . . .
Handling devices that are sensitive to electrostatic
discharge. . . . . . . . . . . . . . . . .
Grounding requirements . . . . . . . . . . .
Safety notices (multilingual translations) . . . . .
Laser compliance statement (multilingual
translations) . . . . . . . . . . . . . . . .
Chapter 2. Important service
information . . . . . . . . . . . . . . 27
Strategy for replacing FRUs . . . . . . . . .
Strategy for replacing a hard disk drive . . .
Important notice for replacing a system
board . . . . . . . . . . . . . . . .
Important information about replacing RoHS
compliant FRUs . . . . . . . . . . . . . .
Chapter 3. General checkout . . . . . 29
What to do first . . . . . . . . . . . . . .
Power system checkout . . . . . . . . . . .
Checking the ac power adapter . . . . . .
Checking operational charging . . . . . .
Checking the battery pack . . . . . . . .
Chapter 4. Related service
information . . . . . . . . . . . . . . 33
Recovering the computer settings . . . . . . .
Passwords . . . . . . . . . . . . . . . .
Power-on password . . . . . . . . . . .
Supervisor password . . . . . . . . . .
Power management . . . . . . . . . . . .
Screen blank mode . . . . . . . . . . .
Sleep mode . . . . . . . . . . . . . .
Hibernation mode
Chapter 5. Lenovo B490 . . . . . . . . 37
Specifications . . . . . . . . . . . . . . .
Status indicators . . . . . . . . . . . . . .
Fn key combinations . . . . . . . . . . . .
Chapter 6. FRU replacement
notices . . . . . . . . . . . . . . . . 41
Screw notices . . . . . . . . . . . . . . .
© Copyright Lenovo 2012
. . . . . . . . . . .
iii Chapter 7. Removing and replacing a
FRU . . . . . . . . . . . . . . . . . . 43
1
General guidelines . . . . . . . . . . . . .
1
1010 Battery pack . . . . . . . . . . . . .
2
1020 Bottom slot cover . . . . . . . . . . .
3
1030 Optical drive . . . . . . . . . . . . .
1040 Memory modules . . . . . . . . . . .
3
1050 Hard disk drive assembly . . . . . . . .
4
1060 PCI Express Mini Card for wireless LAN . .
4
1070 mSATA solid state drive . . . . . . . . .
1080 Backup battery . . . . . . . . . . . .
19
1090 Keyboard . . . . . . . . . . . . . .
1100 Keyboard bezel . . . . . . . . . . . .
1110 LED board . . . . . . . . . . . . . .
1120 Power board . . . . . . . . . . . . .
27
1130 Microphone assembly . . . . . . . . .
28
1140 I/O board . . . . . . . . . . . . . .
28
1150 System board assembly and USB board . .
1160 Thermal module . . . . . . . . . . . .
28
1170 CPU . . . . . . . . . . . . . . . .
1180 LCD unit . . . . . . . . . . . . . . .
1190 Speaker assembly . . . . . . . . . . .
29
1200 DC-in connector and base cover . . . . .
30
2010 LCD front bezel . . . . . . . . . . . .
30
2020 Camera . . . . . . . . . . . . . . .
31
2030 LCD panel, LCD cable, and hinges . . . .
31
2040 Antenna assembly and LCD rear cover . . .
Chapter 8. Locations . . . . . . . . . 77
Front view . . . . . . . . . . . . . . . .
33
Right-side view . . . . . . . . . . . . . .
33
Bottom and left-side view . . . . . . . . . .
34
34
Chapter 9. Parts list . . . . . . . . . . 79
34
Overall . . . . . . . . . . . . . . . . . .
34
LCD FRUs . . . . . . . . . . . . . . . .
34
Keyboard . . . . . . . . . . . . . . . . .
35
Miscellaneous parts
ac power adapters . . . . . . . . . . . . .
Power cords . . . . . . . . . . . . . . .
37
38
Appendix A. Notices . . . . . . . . . . 93
39
Electronic emissions notices . . . . . . . . .
Trademarks . . . . . . . . . . . . . . . .
41
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