Lenovo B8080h Service Manual

							   
    
 
       
 
Important service information 
Important notice for replacing a system board 
Some components mounted on a system  board are very sensitive. Improper 
handling can cause damage to those  components, and may cause a system 
malfunction. 
Attention:  When handling a system board: 
•  Do not drop the system board or  apply any excessive force to it. 
•  Avoid rough handling of any kind. 
•  Avoid bending the system board and hard pushing to prevent cracking at 
each BGA (Ball Grid Array) chipset. 
17  
						

							  
   
       
      
 
     
   
   
     
 
   
 
   
   
 
Lenovo B8080 Hardware Maintenance Manual 
Important information about replacing RoHS compliant FRUs 
RoHS, The Restriction of Hazardous Substances in Electrical and 
Electronic Equipment Directive (2002/ 95/EC) is a European Union legal 
requirement affecting the global elec tronics industry. RoHS requirements 
must be implemented on Lenovo products placed on the market after June 
2006. Products on the market before June 2006 are not required to have 
RoHS compliant parts. If the orig inal FRU parts are non-compliant, 
replacement parts can also be non-compliant. In all cases if the original 
FRU parts are RoHS compliant, the replacement part must also be RoHS 
compliant. 
Note:  RoHS and non-RoHS FRU part numbers  with the same fit and function are 
identified with unique FRU part numbers. 
Lenovo plans to transit to RoHS compliance well before the implementation date 
and expects its suppliers to be ready  to support Lenovo’s requirements and 
schedule in the EU. Products sold in 2005 and 2006 will contain some RoHS 
compliant FRUs. The followi ng statement pertains to these products and any 
product Lenovo produces cont aining RoHS compliant FRUs. 
RoHS compliant FRUs have unique FRU part numbers. Before or after the RoHS 
implementation date, failed RoHS complian t parts must always be replaced with 
RoHS compliant ones, so only the FRUs identified as compliant in the system 
HMM or direct substitutions  for those FRUs may be used. 
Products marketed before June 2006  Products marketed after June 2006 
Current or 
original part  Replacement 
FRU Current or 
original part Replacement 
FRU 
Non-RoHS  Can be Non-RoHS 
Must be RoHS Must be RoHS 
Non-RoHS 
Can be RoHS 
Non-RoHS  Can sub to RoHS 
RoHS  Must be RoHS 
Note:  A direct substitution is a part with  a different FRU part number that is 
automatically shipped by th e distribution center at the time of the order. 
18  
						

							  
     
         
     
 
        
    
 
      
 
   
 
 
   
General checkout 
General checkout 
This chapter presents the following information: 
Important notes: 
• Only certified trained personnel can service the computer. 
•  Before replacing any FRU, read the entire page on removing and 
replacing FRUs. 
•  When you replace FRUs, use new nylon-coated screws. 
•  Be extremely careful during such write operations as copying, 
saving, or formatting. Drives in the computer that you are servicing 
sequence might have been altered. If you select an incorrect drive, data 
or programs might be overwritten. 
•  Replace an FRU only with another FRU of the correct model.  When 
you replace an FRU, make sure that  the machine model and the FRU part 
number are correct by referring to the FRU parts list. 
•  An FRU should not be replaced just because of a single, 
unreproducible failure.  Single failures can occur for a variety of reasons 
that have nothing to do with a hardwa re defect, such as cosmic radiation, 
electrostatic discharge, or software errors. Consider replacing an FRU 
only when a problem recurs. If you  suspect that an FRU is defective, 
clear the error logs and run the test ag ain. If the error does not recur, do 
not replace the FRU. 
•  Be careful not to replace a nondefective FRU. 
19  
						

							    
 
     
 
   
 
   
 
 
 
   
 
 
Lenovo B8080 Hardware Maintenance Manual 
What to do first 
When you do return  an FRU, you must include the following information in the 
parts exchange form or parts return form that you attach to it: 
1.  Name and phone number of servicer 
2.  Date of service 
3.  Date on which the machine failed 
4.  Date of purchase 
5.  Procedure index and page number in  which the failing FRU was detected 
6.  Failing FRU name and part number 
7.  Machine type, model number, and serial number 
8.  Customer’s name and address 
Note for warranty:  During the warranty peri od, the customer may be 
responsible for repair costs if the co mputer damage was caused by misuse, 
accident, modification, unsuitable phys ical or operating environment, or 
improper maintenance by the customer. 
The following is a list of some common items that are not covered under 
warranty and some symptoms that might indicate that the system was subjected 
to stress beyond normal use. 
Before checking problems with the computer, determine whether the damage is 
covered under the warranty by re ferring to the following list: 
The following are not covered under warranty: 
•  LCD panel cracked from the application of excessive force or from being 
dropped 
•  Scratched (cosmetic) parts 
•  Distortion, deformation, or discoloration of the cosmetic parts 
•  Plastic parts, latches, pins, or connectors that have been cracked or broken by 
excessive force 
•  Damage caused by liquid spilled into the system 
•  Damage caused by the improp er insertion of a PC Card or the installation of 
an incompatible card 
•  Improper disk insertion or use of an optical drive 
•  Diskette drive damage caused by pre ssure on the diskette drive cover, 
foreign material in the drive, or the insertion of a diskette with multiple 
labels 
•  Damaged or bent di skette eject button 
•  Fuses blown by attachment of a nonsupported device 
•  Forgotten computer password (making the computer unusable) 
•  Sticky keys caused by spilling a liquid onto the keyboard 
•  Use of an incorrect AC adapter on laptop products 
The following symptoms might indicate damage caused by nonwarranted 
activities: 
•  Missing parts migh t be a symptom of unauthorized service or modification. 
•  If the spindle of a hard disk drive beco mes noisy, it may have been subjected 
to excessive force, or dropped. 
20  
						

							 
       
   
 
 
       
     
   
   
   
General checkout 
Power system checkout 
To verify a symptom, follow the steps below: 
1.	 Turn off the computer. 
2.	  Remove the battery pack. 
3.	  Connect the AC adapter. 
4.	  Make sure that power is supplied  when you turn on the computer. 
5.	  Turn off the computer. 
6.	  Disconnect the AC adapter and install the charged battery pack. 
7.	  Make sure that the battery pack su pplies power when you turn on the 
computer. 
If you suspect a power problem, see the appropriate one of the following power 
supply checkouts: 
•  “Checking the Computer AC Charger ” on page 21 
•  “Checking the internal battery status” on page 22 
Checking the Computer AC Charger 
When you use the computer AC Charger to charge the tablet but no power is 
charged, see the instructio ns in this topic to check the computer AC Charger. 
To check the computer AC Charger, do the following: 
1.	  Disconnect the micro-USB cable from the tablet. 
2.	  Measure the output voltage across the  connector marked B of the micro-USB 
cable. Refer to the following figure: 
1  2  3 (5V) Pin 
Voltage (V dc) 
1  Ground 
2  0 
3  +5 
Note:
 The output voltage across pin 3 of the micro-B connector might be 
different from the one you are servicing. 
3.	  If the voltage is not correct,  replace the micro-USB cable. 
4.	  If the voltage is acceptable, replace the system board. 
21  
						

							  
 
   
 
       
     
   
 
   
Lenovo B8080 Hardware Maintenance Manual 
Checking the internal battery status 
To check the battery status of the  tablet, do either of the following: 
•  Approximate information about the battery status 
Get the approximate status of the battery at any time by checking the battery 
status icon on the system bar in the  upper-right corner of the screen. The 
shorter the green bar is, the less the battery power remains. 
•  Accurate information about the battery status 
To get the accurate information about th e battery status of the tablet, do the 
following: 
1.	  Open the Android Settings screen. 
To open the Android Settings scr een, do either of the following: 
–	  From the main Home screen, touc h the Android Settings icon on 
Lenovo Launch Zone. The Android  Settings screen is displayed. 
–	  Pull down the application icon fr om the action bar and then touch 
Settings. The Android Settings screen is displayed. 
2.	  Touch Battery in the Device sectio n on the Android Settings screen. 
3.	  The accurate percentage of the rema ining battery power is shown on the 
screen. 
22  
						

							     
   
 
 
 
Related service information 
Related service information 
This chapter presents the following information: 
• “Security” on page 23 
•  “Power management” on page 23 
Security 
Security settings include: SCREEN SE CURITY, SIM CARD LOCK (3G version 
only), PASSWORDS, DEVICE ADMINISTRATION and CREDENTIAL 
STORAGE. 
Power management 
Note:  Power management modes are not su pported for APM operating system. 
To reduce power consumption, the co mputer has three power management 
modes: screen blank, sleep  (standby), and hibernation. 
Activating/Deactivating the Display 
With the display deactivated, press the Po wer button on the computer to activate 
the display. The computer display will th en illuminate, indicating that it has 
been activated. 
If you do not need to use your computer temporarily, you can press the Power 
button to deactivate the display. Your co mputer will then enter standby mode to 
save power. 
23  
						

							 
   
 
 
 
   
Lenovo B8080 Hardware Maintenance Manual 
Lenovo B8080 
This chapter presents the following pr oduct-specific service references and 
product-specific parts information: 
•  “Specifications” on page 24 
•  “FRU replacement notices” on page 26 
•  “Removing and replacing an FRU” on page 27 
•  “Locations” on page 73 
•  “Parts list” on page 75 
Specifications 
The following table lists the specific ations of the Lenovo B8080 tablet. 
Note: 
The listed technical data is applicable to both versions of the product, i.e. the 
3G version and the WiFi version, unless otherwise specified. 
Table 1. Specifications 
Feature Description 
Size & Weight 
Size  •  261mm x 180mm x (3.5 - 8.8)mm 
Weight  •  WiFi version: 626g 
•  3G version: 628g 
System 
CPU  •  1.6GHz 
Hardware Platform  •  3G version: Qualcomm MSM8228 
•  WiFi version: Qualcomm APQ8028 
RAM  •  2GB 
Storage Capacity  •  16GB / 32GB (upgradable through external 
Micro-SD card of up to 64GB) 
LCD  •  10.1”, 1,920 x 1200 pixels 
Integrated Camera  •  Rear camera, 8.0Mega pixels, AF 
•  Front camera, 1.6Mega pixels, HD 
Battery  •  Lithium battery, 9,000mAh 
Operating System  •  Android 4.3 (upgradable during lifecycle to new OP system) 
Network 
• 

WCDMA, GSM/EDGE (for 3G version only) 
24  
						

							  
 
 
Lenovo B8080 
Ports  •  Micro-USB (USB 2.0) 
•  Earphone, 3.5mm 
•  SIM card slot (for 3G version only) 
•  Micro-SD card slot 
Communication  •  WiFi, 802.11b/g/n 
•  WCDMA - 900/2100 (for 3G version only) 
•  GSM/EDGE - 900/1800/1900 (for 3G version only) 
•Bluetooth 4.0 
•GPS 
•  A-GPS (for 3G version only) 
Others  •  Speaker (Left and right) 
•  Microphone 
•Gravity sensor 
•E-compass 
•  Ambient light sensor 
•Vibration 
•Hall sensor 
•  LED indicator (on power key) 
•  Dolby audio system (DS1) 
•  Miracast 
25  
						

							        
 
 
    
 
   
   
     
   
Lenovo B8080 Hardware Maintenance Manual 
FRU replacement notices 
This section presents notices related to  removing and replacing parts. Read this 
section carefully before replacing any FRU. 
Screw notices 
Loose screws can cause a reliability proble m. In Lenovo computers, this problem 
is addressed with special nylon-coat ed screws that have the following 
characteristics: 
•  They maintain tight connections. 
•  They do not easily come loose, even with shock or vibration. 
•  They are harder to tighten. 
•  Each one should be used only once. 
Do the following when you service this machine: 
•  Keep the screw kit in your tool bag. 
•  Always use new screws. 
•  Use a torque screwdriver if you have one. 
Tighten screws as follows: 
•  Plastic to plastic 
Turn an additional 90° after the screw  head touches the surface of the plastic 
part: 
more than 90° 
(Cross-section) 
•  Logic card to plastic 
Turn an additional 180° after the screw head touches the surface of the logic 
card: 
more than 180° 
(Cross-section) 
• To r q u e  d r i v e r 
If you have a torque screwdriver, refer  to the “Torque” column for each step. 
•  Make sure that you use the correct screws. If you have a torque screwdriver, 
tighten all screws firmly to the torque shown in the table.  Never use a screw 
that you removed. Use a new one. Make sure that all screws are 
tightened firmly . 
•  Ensure torque screwdrivers are cali brated correctly following country 
specifications. 
26