Lenovo A3000h Service Manual

							Use t
he following strategy to prevent unnecessary expense for replacing and 
servicing FRUs: 
•  If you are instructed to replace an FRU, but the replacement does not solve the  problem, reinstall the original FRU before you continue. 
•  Some computers have both a processor board and a system board. If you are  instructed to replace either of them, and replacing one of them does not solve the 
problem, reinstall that board, and then replace the other one. 
•  If an adapter or a device consists of more than one FRU, any of the FRUs may be  the cause of the error. Before replacing the adapter or device, remove the FRUs 
one by one to see if the symptoms change. Replace only the FRU that changed 
the symptoms. 
Attention:  The setup configuration on the computer you are servicing may have 
been cu

stomized. Running Automatic Configuration may alter the settings. Note 
the current configuration settings (using the View Configuration option); then, 
when service has been completed, verify that those settings remain in effect. 
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.  
						

							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 electronics 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 original 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 
identif

ied 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 following statement pertains to these products and any 
product Lenovo produces containing RoHS compliant FRUs. 
 
RoHS compliant FRUs have unique FRU part numbers. Before or after the RoHS 
implementation date, failed RoHS compliant 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 
Non-RoHS Can be RoHS 
Non-RoHS Can sub to RoHS 
RoHS Must  be RoHS  Must be RoHS 
Must be RoHS 
 
Note: A direct substitution is a part with a different FRU part number that is 
automatic
 ally shipped by the distribution center at the time of the order.  
						

							General checkout 
This chapter presents the following information: 
•• “ What to do first”  on page 20 
••  “ Power system checkout”  on page 21 
 
Befor

e you go to the checkout, make sure to read the following important notes: 
 
Important notes: 
•   Only certified trained personnel can service the computer. 
•  Before replacing any FRU, read the entire page on removing and 
replac

ing FRUs.  
•  When you replace FRUs, use new nylon-coated screws. 
•  Be extremely careful during such write operations as copying, saving, 
or for

matting.  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 
repla

ce 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.  S

ingle failures can occur for a variety of reasons that have nothing to 
do wi
th a hardware 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 
again. If the error does not recur, do not replace the FRU.   
•  Be careful not to replace a nondefective FRU.  
  
						

							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 period, the customer may be responsible 
for repair 

costs if the computer damage was caused by misuse, accident, 
modification, unsuitable physical 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 referring to the following list: 
 
The following are not covered under warranty: 
•  LC
 D 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 improper insertion of a PC Card or the installation of an  incompatible card 
•  Improper disc insertion or use of an optical drive 
•  Diskette drive damage caused by pressure on the diskette drive cover, foreign  material in the drive, or the insertion of a diskette with multiple labels 
•  Damaged or bent diskette 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 
activ
 ities: 
•  Missing parts might be a symptom of unauthorized service or modification.   
•  If the spindle of a hard disk drive becomes noisy, it may have been subjected to  excessive force, or dropped.  
						

							Power system checkout 
If you suspect a power problem, see the appropriate one of the following power 
supply checkouts: 
•• “ Checking the AC adapter ” on page 21 
••  “ Checking the battery pack ” on page 22 
Checking the AC adapter 
You are here because the computer fails only when the AC adapter is used. 
•  If the power-on indicator does not turn on, check the power cord of the AC adapter 
for correct continuity and installation. 
To check the AC adapter, follow the steps below: 
1.  Unplug the AC adapter cable from the tablet. 
2.  Measure the output voltage at the plug of the AC adapter cable. See the following  figure: 
 
Note:  Output voltage for the AC adapter pin No. 2 may differ from the one you are 
servicing. 
3

.  If the voltage is not correct, replace the AC adapter. 
4.  If the voltage is acceptable, do the following: 
•   Replace the system board.   
•   If the problem continues, go to “ Lenovo IdeaTab A3000” on page 24 . 
Note:  Noise from the AC adapter does not always indicate a defect.  
						

							Checking the battery pack 
Battery charging does not start until the Power Meter shows that less than 95% 
of the total power remains; under this condition the battery pack can charge to 
100% of its capacity. This protects the battery pack from being overcharged or 
from having a shortened life. 
 
Tap the battery icon in the icon tray, and the percentage of battery power 
remaining is displayed. To get detailed information about the battery, tap Battery 
under Settings In the applications list, to enter the battery information interface. 
 
Note: If the battery pack becomes hot, it may not be able to be charged. Remove 
it from the com
 puter and leave it at room temperature for a while. After it cools 
down, reinstall and recharge it. 
 
To check the battery pack, follow the steps below: 
1.  Turn off the computer. Follow the removal steps in “ 1020 Battery pack” on page 29  
in “ Remo

ving and replacing an FRU”  on page 26. 
2. 
Measure the voltage between battery terminals 1 (+) and 6 (-). See the following 
figure: 
 
 
3. 

If the voltage is less than +3.4 V DC, the battery pack has been discharged.   
  Note:  Recharging will be continued for at least 3 hours, even though the indicator 
does not 
 light on. 
  If the voltage is still less than +3.4 V DC after recharging, replace the battery. 
  
						

							Related service information 
This chapter presents the following information: 
•• “ Locking the screen ” on page 23 
••  “ Power management ” on page 23 
 
Locking the screen 
To set the lock screen function, do the following: 
 
1.  Power on your computer. 
2. Tap  Security under Settings In the applications list, to enter the  screen lock 
settings

 interface. 
3. Tap
  Screen lock  to set the screen unlock mode: 
 
Note: 
You are ab

le to lock the screen to protect your computer data in one of the four 
ways: Slide lock, Pattern lock, PIN lock and Password lock. You can also 
deactivate the screen lock here as well. 
 
Power management 
To reduce power consumption, the IdeaTab has a Sleep (standby) mode. 
Sleep (standby) mode 
To put your device in Sleep mode, press the Power button. This will turn the 
display off. 
To turn the display on, press the Power button again. 
  
						

							Lenovo IdeaTab A3000 
This chapter presents the following product-specific service references and 
product-specific parts information: 
•• “ Specifications ” on page 24 
••  “ FRU replacement notices ” on page 25 
•••  “ Removing and replacing an FRU ” on page 26 
•••  “ Locations ” 
on

 page 36 
•••  “ Parts list ” on page 38 
Specifications 
The following table lists the specifications of the Lenovo IdeaTab A3000: 
Table 1. Specifications 
Feature Description 
Processor/Chipset  • MTK MT8389(3G)/MT8319(WiFi) 
Graphic memory chip  • MT83x9 Intergrated 
Display  • 7.0”, LED backlight 
•   1024 × 600 pixels 
Storage  •  LP DDR2 1GB 
eMMC  •  4GB/8GB/16GB (support up to 32GB capacity) 
I/O port 
•  Micro USB connector × 1 (for power charge 
and data sync) 
•   MicroSD slot × 1 
•   SIM card slot × 2 
•   Combo audio jack × 1 
•   Microphone hole × 1 
•   Speaker × 2 
PCI Express Mini Card slot • Wi-Fi (802.11 b/g/n) 
Bluetooth wireless  • Bluetooth 4.0 
Keyboard  • N/A 
Touch screen  • Support Multi-touch 
Integrated camera  •  0.3 M (front camera) 
•   5.0 M (back camera) 
Battery  • 3500 mAH 
AC adapter  •  5V/1.5A (charge from micro USB port) 
Pre-installed operating 
system  •
  Android version 4.2 
  
						

							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 problem. In the Lenovo IdeaPad computer, 
this problem is addressed with special nylon-coated 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 
  Tu
 rn an additional 90° after the screw head touches the surface of the plastic part: 
 
•  Logic card to plastic  
  Tu
 rn an additional 180° after the screw head touches the surface of the logic card: 
 
•  Torque driver  
  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 . 
•  Ensu
re torque screwdrivers are calibrated correctly following country 
specifications.  
						

							Removing and replacing an FRU 
This section presents exploded figures with the instructions to indicate how to 
remove and replace the FRU. Make sure to observe the following general rules: 
1.  Do not attempt to service any computer unless you have been trained and certified. An untrained person runs the risk of damaging parts. 
2.  Before replacing any FRU, review “FRU replacement notices” on page 25. 
3.  Begin by removing any FRUs that have to be removed before the failing FRU. Any  of such FRUs are listed at the top of the page. Remove them in the order in which 
they are listed. 
4.  Follow the correct sequence in the steps to remove the FRU, as given in the  figures by the numbers in square callouts. 
5.  When turning a screw to replace an FRU, turn it in the direction as given by the  arrow in the figure. 
6.  When removing the FRU, move it in the direction as given by the arrow in the  figure. 
7.  To put the new FRU in place, reverse the removal procedures and follow any of  the notes that pertain to replacement. For information about connecting and 
arranging internal cables, see “Locations” on page 3 6. 
8.  When replacing an FRU, use the correct screw as shown in the procedures. 
 
DANGER 
Before

 removing any FRU, turn off the computer, unplug all power cords from 
electrical outlets, remove the battery pack, and then disconnect any of the 
interconnecting cables. 
 
Attention:  After replacing an FRU, do not turn on the computer until you have 
made sur

e that all screws, springs, and other small parts are in place and none 
are loose inside the computer. Verify this by shaking the computer gently and 
listening for rattling sounds. Metallic parts or metal flakes can cause electrical 
short circuits. 
 
Attention:  The system board is sensitive to, and can be damaged by, 
electrost

atic discharge. Before touching it, establish personal grounding by 
touching a ground point with one hand or using an electrostatic discharge (ESD) 
strap (P/N 6405959) to remove potential shock reasons.