Lenovo U 160 Service Manual

47
Lenovo IdeaPad U160/U165
1090 DIMM
For access, remove these FRUs in order: 
• “1010 Battery pack” on page 34
• “1020 Dummy card” on page 35
• “1040 Keyboard” on page 37
• “1050 Base cover” on page 39
Figure 9. Removal steps of DIMM 
Release  the  two  latches  on  both  edges  of  the  socket  at  the  same  time  in  the direction shown by arrows 1, and then unplug the DIMM in the direction shown by arrows 2.
2
11
2
11
When installing: Insert the notched end of the DIMM into the socket. Push the DIMM...

48
IdeaPad U160/U165 Hardware Maintenance Manual
1100 Fan assembly and heat sink assembly
For access, remove this FRU:
• “1010 Battery pack” on page 34
• “1020 Dummy card” on page 35
• “1040 Keyboard” on page 37
• “1050 Base cover” on page 39
• “1060 PCI Express Mini Card for wireless LAN/WAN” on page 42
• “1070 LCD unit” on page 44
Figure 10. Removal steps of fan assembly and heat sink assembly
Note: Loosen  three  screws 1,  but  do  not  remove  them.  Detach  the  fan connector in the direction shown...

49
Lenovo IdeaPad U160/U165
Figure 10. Removal steps of fan assembly and heat sink assembly (continued)
Lift the fan assembly and heat sink assembly in the direction shown by arrow 3. Be careful not to damage the connector.
3
ab
When  installing: Before  you  attach  the  fan  assembly  to  the  computer,  apply thermal grease, at an amount of 0.2 grams, to the a b part shown in the figure above.  Either  too  much  or  too  less  grease  application  can  cause  a  thermal problem due to imperfect...

50
IdeaPad U160/U165 Hardware Maintenance Manual
1110 System board
Important notices for handling the system board:
When handling the system board, bear the following in mind.
• Be  careful  not  to  drop  the  system  board  on  a  bench  top  that  has  a  hard  surface, 
such as metal, wood, or composite.
•  Avoid rough handling of any kind.
•  In the whole process, make sure not to drop or stack the system board.
•  If you put a system board down, make sure to put it only on a padded surface such 
as...

51
Lenovo IdeaPad U160/U165

Figure 11. Removal steps of system board
Detach  two  FPC  connectors  and  one  connector  in  the  direction  shown  by arrows 1 2.

12
2

12

Remove three screws 3, detach the speakers connector in the direction shown by arrow 4. 
3
33

4

When installing: Make sure that all the connectors are attached firmly.

StepScrew (quantity)ColorTorque
3M2 × 5 mm, flat-head, nylok-coated (3)White1.6 kgfcm 

52
IdeaPad U160/U165 Hardware Maintenance Manual
Figure 11. Removal steps of system board (continued)
Remove the system board in the direction shown by arrow 5.
5 

53
Lenovo IdeaPad U160/U165
1120 Speakers
For access, remove these FRUs in order:
• “1010 Battery pack” on page 34
• “1020 Dummy card” on page 35
• “1040 Keyboard” on page 37
• “1050 Base cover” on page 39
• “1060 PCI Express Mini Card for wireless LAN/WAN” on page 42
• “1070 LCD unit” on page 44
• “1080 Hard disk drive (HDD)” on page 46
• “1090 DIMM” on page 47
• “1100 Fan assembly and heat sink assembly” on page 48
• “1110 System board” on page 50
Figure 12. Removal steps of speakers
Remove two screws...

54
IdeaPad U160/U165 Hardware Maintenance Manual
1130 Bluetooth card
For access, remove these FRUs in order:
• “1010 Battery pack” on page 34
• “1020 Dummy card” on page 35
• “1040 Keyboard” on page 37
• “1050 Base cover” on page 39
• “1060 PCI Express Mini Card for wireless LAN/WAN” on page 42
• “1070 LCD unit” on page 44
• “1080 Hard disk drive (HDD)” on page 46
• “1090 DIMM” on page 47
• “1100 Fan assembly and heat sink assembly” on page 48
• “1110 System board” on page 50
Figure 13. Removal steps of...

55
Lenovo IdeaPad U160/U165
1140 LCD front bezel
For access, remove these FRUs in order: 
• “1010 Battery pack” on page 34
• “1020 Dummy card” on page 35
• “1040 Keyboard” on page 37
• “1050 Base cover” on page 39
• “1060 PCI Express Mini Card for wireless LAN/WAN” on page 42
• “1070 LCD unit” on page 44
Figure 14. Removal steps of LCD front bezel
Remove two screws 1. 
1
1
StepScrew (quantity)ColorTorque
1M2 × 3 mm, flat-head, nylok-coated (2)Black1.6 kgfcm
Remove the LCD front bezel in the direction...

56
IdeaPad U160/U165 Hardware Maintenance Manual
1150 LCD panel, LCD cable and hinges
For access, remove these FRUs in order: 
• “1010 Battery pack” on page 34
• “1020 Dummy card” on page 35
• “1040 Keyboard” on page 37
• “1050 Base cover” on page 39
• “1060 PCI Express Mini Card for wireless LAN/WAN” on page 42
• “1070 LCD unit” on page 44
• “1140 LCD front bezel” on page 55
Figure 15. Removal steps of LCD panel, LCD cable and hinges
Remove  four  screws 1  and  then  detach  the  hinges  in  the...