Lenovo Yoga 8 Service Manual

							Lenovo B6000 / B8000
47
2.Remove the conductive fiber of the main PCBA as shown below.
Figure 8-2 Removing the conductive fiber
3.Remove two screws   on the holder for fixing the USB FPC.
Figure 8-3 Screws on the USB FPC holder
a 
						

							Lenovo B6000/B8000 Hardware Maintenance Manual
48
4.Remove the USB FPC holder as shown below.
Figure 8-4 Removing the USB FPC holder 
						

							Lenovo B6000 / B8000
49
5.Disconnect the FPC for connecting the main PCBA and sub board as shown 
below.
Figure 8-5 Disconnecting the FPC between the main PCBA and sub board 
						

							Lenovo B6000/B8000 Hardware Maintenance Manual
50
6.Unlock the LCD FPC connector using a guitar pick and then unplug the LCD 
FPC from the connector as shown in the figure below.
Figure 8-6 Disconnecting the LCD FPC 
						

							Lenovo B6000 / B8000
51
7.Remove the adhesive tapes for fixing the RF cable and frame of the main 
antenna as shown below.
Figure 8-7 Removing the adhisive tapes 
						

							Lenovo B6000/B8000 Hardware Maintenance Manual
52
8.Remove the main PCBA together with the connected main antenna and WiFi 
antenna.
Figure 8-8 Main PCBA removed
9.Turn over the main PCBA as well as the connected parts and then disconnect 
the RF cable of the main antenna (for B6000-H and B8000-H only).
Figure 8-9 Disconnecting the RF cable of the main antenna 
						

							Lenovo B6000 / B8000
53
10.Unlock the connector of the main antenna FPC using a guitar pick as shown 
below.
Figure 8-10 Unlock the main antenna FPC connector
11.Turn over the main PCBA and then detach the main antenna FPC from the 
PCBA using a thin flat blade.
Figure 8-11 Main antenna FPC detached 
						

							Lenovo B6000/B8000 Hardware Maintenance Manual
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12.Remove the main antenna from the main PCBA.
Figure 8-12 Main antenna removed
13. Disconnect the RF cable of the WiFi antenna from its connector on the main 
PCBA and remove the WiFi antenna.
Figure 8-13 Disconnecting the RF cable of the WiFi antenna
StepScrew (quantity)ColorTorque
Phillips flat-head, M1.4 × 1.5mm (6) Black N/A
a 
						

							Lenovo B6000 / B8000
55 1090 Sub board
For access, remove this FRU:
• “1010 Rear cover ” on page 28
1.Remove four screws   for fixing the sub board to the main body.
Figure 9-1 Screws on the sub board
Important notices for handling PCB:
When handling PCB, bear the following in mind:
• Be careful not to drop the PCB onto a bench top that has a hard surface, 
such as surface made of metal, wood, or composite materials.
• Avoid rough handling of any kind.
• Make sure not to drop or stack the PCB in the whole process.
• Make sure to put the PCB only on surface covered with materials such as 
an ESD mat or conductive corrugated plate.
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2.Unlock the TP FPC connector on the sub board using a guitar pick and then 
detach the TP FPC from the connector.
Figure 9-2 Disconnecting the TP FPC
3.Detach the right speaker FPC as decribed in operation task “1020 Right 
speaker box” on page 32.
4.Disconnect the FPC for connecting the main PCBA and sub board as 
described in operation task “1080 Main PCBA” on page 46.