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Lenovo TAB 2 A8-50F, Hardware Maintenance Manual

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Lenovo TAB 2 A8-50F Hardware Maintenance Manual Download Page 55

Lenovo TAB 2 A8-50

51

8.

Remove the conductive fabric on the main board.

Figure 5-8. Removing the conductive fabric

9.

Remove screws 

 and 

 as shown in the figure below.

Figure 5-9. The screws on the bracket

Part No.

Screw (quantity)

Color

Torque

Phillips flat head screw, M1.4 × 3.0 for 
blue TP LCM assembly (5)
Phillips flat head screw, M1.4 × 3.5 for 
white TP LCM assembly (5)

Silver

N/A

Phillips flat head screw, M1.4 × 2.5 (1)

Silver

N/A

a

b

a

b

Summary of Contents for TAB 2 A8-50F

Page 1: ...Lenovo TAB 2 A8 50 Hardware Maintenance Manual Lenovo TAB 2 A8 50F Lenovo TAB 2 A8 50L Lenovo TAB 2 A8 50LC ...

Page 2: ...eloped exclusively at private expense and are sold to governmental entities as commercial items as defined by 48 C F R 2 101 with limited and restricted rights to use reproduction and disclosure LIMITED AND RESTRICTED RIGHTS NOTICE If products data computer software or services are delivered pursuant to a General Services Administration GSA contract use reproduction or disclo sure is subject to re...

Page 3: ...ckout 21 Checking the Computer AC Charger 21 Checking the internal battery status 22 Related service information 23 Security 23 Power management 23 Activating Deactivating the Display 23 Lenovo TAB 2 A8 50 24 Specifications 24 Components location 26 Front view 26 Rear view 27 Parts list 28 FRUs list 28 Screws list 31 FRU replacement notices 32 Screw notices 32 Removing and replacing an FRU 33 1010...

Page 4: ... servicing computers The product specific section includes service reference and product specific parts information About this manual Note The information provided in this manual is applicable to both product versions mentioned above unless otherwise specified Important This manual is intended only for trained servicers who are familiar with Lenovo products Use this manual to troubleshoot problems...

Page 5: ...ervice a Lenovo computer General safety on page 2 Electrical safety on page 3 Safety inspection guide on page 5 Handling devices that are sensitive to electrostatic discharge on page 6 Grounding requirements on page 6 Safety notices multilingual translations on page 7 Laser compliance statement on page 14 Safety information ...

Page 6: ...ay from all personnel while you are servicing the machine Keep your toolcase away from walk areas so that other people will not trip it over Do not wear loose clothing that can be trapped in the moving parts of the machine Make sure that your sleeves are fastened or rolled up above your elbows If your hair is long fasten it Insert the ends of your necktie or scarf inside clothing or fasten it with...

Page 7: ...ck Attention An electrical shock can occur only when there is a complete circuit By observing the above rule you may prevent a current from passing through your body When using testers set the controls correctly and use the approved probe leads and accessories for that tester Stand on suitable rubber mats obtained locally if necessary to insulate you from grounds such as metal floor strips and mac...

Page 8: ... of a plastic dental mirror The surface is conductive such touching can cause personal injury and machine damage Do not service the following parts with the power on when they are removed from their normal operating places in a machine Power supply units Pumps Blowers and fans Motor generators and similar units This practice ensures correct grounding of the units If an electrical accident occurs C...

Page 9: ... determine whether there are any potential unsafe conditions use the following checklist at the beginning of every service task Begin the checks with the power off and the power cord disconnected Checklist 1 Check exterior covers for damage loose broken or sharp edges 2 Turn off the computer Disconnect the power cord 3 Check the power cord for a A third wire ground connector in good condition Use ...

Page 10: ...e mat is especially useful when handling ESD sensitive devices Select a grounding system such as those listed below to provide protection that meets the specific service requirement Attach the ESD ground clip to any frame ground ground braid or green wire ground When working on a double insulated or battery operated system use an ESD common ground or reference point You can use coax or connector o...

Page 11: ... Austausch der Computer wieder angeschlossen wird muß sichergestellt werden daß keine Schrauben Federn oder andere Kleinteile fehlen oder im Gehäuse vergessen wurden Der Computer muß geschüttelt und auf Klappergeräusche geprüft werden Metallteile oder splitter können Kurzschlüsse erzeugen Prima di accendere l elaboratore dopo che é stata effettuata la sostituzione di una FRU accertarsi che tutte l...

Page 12: ...alten Sie darf nicht zerlegt wiederaufgeladen kurzgeschlossen oder Feuer oder Wasser ausgesetzt werden Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten Beim Ersetzen der Bereitschafts oder Systembatterie nur Batterien des Typs verwenden der in der Ersatzteilliste aufgeführt ist Der Einsatz falscher Batterien kann zu Entzündung oder Explosion führen Alcune batterie di riserva c...

Page 13: ...eschlossen oder Feuer oder Wasser ausgesetzt werden Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten Beim Ersetzen der Batterie nur Batterien des Typs verwenden der in der Ersatzteilliste aufgeführt ist Der Einsatz falscher Batterien kann zu Entzündung oder Explosion führen La batteria contiene piccole quantità di nichel Non smontarla gettarla nel fuoco o nell acqua né cortoci...

Page 14: ...ieses Typs dürfen nicht aufgeladen zerlegt über 100 C erhitzt oder verbrannt werden Auch darf ihr Inhalt nicht mit Wasser in Verbindung gebracht oder der zur richtigen Polung angebrachte Verbindungsstecker entfernt werden Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten Beim Ersetzen der Batterie nur Batterien des Typs verwenden der in der Ersatzteilliste aufgeführt ist Der Ei...

Page 15: ...ten Der LCD Bildschirm besteht aus Glas und kann zerbrechen wenn er unsachgemäß behandelt wird oder der Computer auf den Boden fällt Wenn der Bildschirm beschädigt ist und die darin befindliche Flüssigkeit in Kontakt mit Haut und Augen gerät sollten die betroffenen Stellen mindestens 15 Minuten mit Wasser abgespült und bei Beschwerden anschließend ein Arzt aufgesucht werden Nel caso che caso l LCD...

Page 16: ... battery can produce enough current to burn personnel or combustible materials Bien que le voltage des batteries principales soit peu élevé le court circuit ou la mise à la masse d une batterie peut produire suffisamment de courant pour brûler des matériaux combustibles ou causer des brûlures corporelles graves Obwohl Hauptbatterien eine niedrige Spannung haben können sie doch bei Kurzschluß oder ...

Page 17: ...et déconnectez tous les cordons d interface Die Stromzufuhr muß abgeschaltet alle Stromkabel aus der Steckdose gezogen der Akku entfernt und alle Verbindungskabel abgenommen sein bevor eine FRU entfernt wird Prima di rimuovere qualsiasi FRU spegnere il sistema scollegare dalle prese elettriche tutti i cavi di alimentazione rimuovere la batteria e poi scollegare i cavi di interconnessione Antes de ...

Page 18: ... device could result in exposure to hazardous laser radiation There are no serviceable parts inside those drives Do not open Laser compliance statement CAUTION Use of controls or adjustments or performance of procedures other than those specified herein might result in hazardous radiation exposure O uso de controles ajustes ou desempenho de procedimentos diferentes daqueles aqui especificados pode...

Page 19: ...luz Rayonnement laser si carter ouvert Évitez de fixer le faisceau de le regarder directement avec des instruments optiques ou de vous exposer au rayon Laserstrahlung bei geöffnetem Gerät Nicht direkt oder über optische Instrumente in den Laserstrahl sehen und den Strahlungsbereich meiden Kinyitáskor lézersugár Ne nézzen bele se szabad szemmel se optikai eszközökkel Kerülje a sugárnyalábbal való é...

Page 20: ...d 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...

Page 21: ...itive 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 ...

Page 22: ...s 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 ...

Page 23: ...ce 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 variet...

Page 24: ...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 ...

Page 25: ...e 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 instructions 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...

Page 26: ... Accurate information about the battery status To get the accurate information about the battery status of the tablet do the following 1 Open the Android Settings screen To open the Android Settings screen do either of the following From the main Home screen touch the Android Settings icon on Lenovo Launch Zone The Android Settings screen is displayed Pull down the application icon from the action...

Page 27: ...e power consumption the computer has three power management modes screen blank sleep standby and hibernation Activating Deactivating the Display With the display deactivated press the Power button on the computer to activate the display The computer display will then illuminate indicating that it has been activated If you do not need to use your computer temporarily you can press the Power button ...

Page 28: ...PU Quad Core 64bit Hardware Platform MT8161 Lenovo TAB 2 A8 50F MT8735 Lenovo TAB 2 A8 50L LC RAM LP DDR3 1GB 2GB Storage Capacity 8GB 16GB LCD 8 1 280 x 800 pixels Integrated Camera Rear camera 5 0Mega pixels Auto Focus Front camera 2 0Mega pixels Fixed Focus Battery Li ion battery 4 200mAh Operating System Android 5 0 upgradable to new OS version Network GSM WCDMA Lenovo TAB 2 A8 50F GSM WCDMA L...

Page 29: ...n WiFi 802 11b g n GSM EDGE 850 900 1800 1900MHz WCDMA 2100 900MHz Lenovo TAB 2 A8 50L LC Bluetooth 4 0 A GPS support GPS Beidou for PRC A GPS support GPS Glonass for other countries Voice call Lenovo TAB 2 A8 50L LC FM radio Others Speaker Dual Microphone Gravity sensor Proximity senor Lenovo TAB 2 A8 50L LC Light sensor Lenovo TAB 2 A8 50L LC Vibration Dolby audio system DAX2 WiFi Direct WiFi Di...

Page 30: ...Lenovo TAB 2 A8 50 Hardware Maintenance Manual 26 Front view Front camera Top side speaker Bottom side speaker Components location ...

Page 31: ...Lenovo TAB 2 A8 50 27 Rear view Power key Volume key Rear camera Micro USB connection Audio Jack Dual micro SIM card slot Lenovo TAB 2 A8 50L LC Micro SD card slot Microphone k ...

Page 32: ...ts FRUs list on page 28 Screws list on page 31 FRUs list Parts list Note The listed technical data is applicable to all versions of the product i e the WiFi version Lenovo TAB 2 A8 50F the LTE data version Lenovo TAB 2 A8 50L and the LTE voice version Lenovo TAB 2 A8 50LC unless otherwise specified ...

Page 33: ...Lenovo TAB 2 A8 50 29 ...

Page 34: ...B 2 A8 50L LC 5A38C02619 N 8 Lenovo TAB 2 A8 50 main board assembly with top side speaker and side key FPC Lenovo TAB 2 A8 50F 5B28C02076 16G Lenovo TAB 2 A8 50L LC 5B28C02071 16G N Top side speaker 5R78C02049 N Side key FPC 5B68C02047 N 9 Lenovo TAB 2 A8 50 BT WIFI GPS antenna bracket 5A38C02053 N 10 Lenovo TAB 2 A8 50 rear camera SC29A6N34V N 11 Lenovo TAB 2 A8 50 metal piece for fixing the batt...

Page 35: ...5 for blue TP LCM assembly 5M89A33423 N Phillips cross head screw M1 4 3 5 for blue TP LCM assembly 5M89A4665T N Phillips cross head screw M1 4 2 5 for white TP LCM assembly 5M89A467WG N Phillips cross head screw M1 4 3 0 for white TP LCM assembly 5M89A33425 N Phillips cross head screw M1 4 2 5 5M88C02060 N ...

Page 36: ...l 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 Logic card to plastic Turn 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 t...

Page 37: ... 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 Component Locations on page 26 8 When replacing an FRU use the correct screw as specified in the procedures Attention After replacing an FRU do not turn on the computer until you have made su...

Page 38: ...10 Rear cover with side key 1 Open the SD SIM card cover Figure 1 1 Opening the SD SIM card cover 2 Remove the dual micro SIM card tray from its slot Lenovo TAB 2 A8 50L LC only Figure 1 2 Removing the dual micro SIM card tray Lenovo TAB 2 A8 50L LC only ...

Page 39: ...the tablet in one hand and use a triangle paddle to unlock the rear cover from the tablet along the joint line as shown in the figure below Figure 1 4 Unlocking the rear cover from the front module along the joint line Part No Screw quantity Color Torque Phillips flat head screw M1 4 2 5 1 Black N A a a ...

Page 40: ...Lenovo TAB 2 A8 50 Hardware Maintenance Manual 36 5 Slowly remove the rear cover Figure 1 5 The removed rear cover with side key ...

Page 41: ...ntity Color Torque Phillips flat head screw M1 4 2 5 2 Black N A CAUTION Risk of explosion if the battery is replaced with an incorrect type When replacing the lithium battery use only the same or an equivalent type that is recommended by the manufacturer The battery contains lithium and can explode if not properly used handled or disposed of Dispose of the used battery according to the instructio...

Page 42: ...AB 2 A8 50 Hardware Maintenance Manual 38 2 Remove the metal piece Figure 2 2 Removing the metal piece 3 Disconnect the battery FPC from its connector on the main board Figure 2 3 Disconnecting the battery FPC ...

Page 43: ... 2 A8 50 39 4 Detach the battery FPC from the main board Figure 2 4 Detaching the battery FPC 5 Detach the battery pack from the front module of the tablet using a flat blade Figure 2 5 Detaching the battery pack ...

Page 44: ...Lenovo TAB 2 A8 50 Hardware Maintenance Manual 40 6 Remove the battery pack Figure 2 6 Removing the battery pack Figure 2 7 The removed battery pack ...

Page 45: ...ear cover with side key on page 34 and Detach the following FPC from the main board Battery FPC see Step 1 on page 37 to Step 3 on page 38 in 1020 Battery pack 1 Detach the connector of the rear camera FPC from the main board Figure 3 1 Detaching the connector of the rear camera FPC ...

Page 46: ...Lenovo TAB 2 A8 50 Hardware Maintenance Manual 42 2 Remove the rear camera from its seat as shown in the figure below Figure 3 2 Removing the rear camera Figure 3 3 The removed rear camera ...

Page 47: ...FRU 1010 Rear cover with side key on page 34 and Detach the following FPC from the main board Battery FPC see Step 1 on page 37 to Step 3 on page 38 in 1020 Battery pack 1 Unlock the connector of the TP FPC on the main board Figure 4 1 Unlocking the connector of the TP FPC ...

Page 48: ... out the TP FPC from its connector on the main board Figure 4 2 Pulling out the TP FPC 3 Remove screws on the top side speaker Figure 4 3 The screws on the top side speaker Part No Screw quantity Color Torque Phillips flat head screw M1 4 2 5 2 Black N A a a ...

Page 49: ...ck the connector of the front camera FPC on the main board Figure 4 4 Unlocking the connector of the front camera FPC 5 Pull out the front camera FPC from its connector on the main board Figure 4 5 Pulling out the front camera FPC ...

Page 50: ...Lenovo TAB 2 A8 50 Hardware Maintenance Manual 46 Figure 4 6 The removed front camera ...

Page 51: ...h side key on page 34 1020 Battery pack on page 37 1030 Rear camera on page 41 1040 Front camera on page 43 1 Remove screws on the bracket as shown in the figure below Figure 5 1 The screws on the bracket Part No Screw quantity Color Torque Phillips flat head screw M1 4 2 5 2 Black N A Phillips flat head screw M1 4 2 5 1 Silver N A a a b ...

Page 52: ...e Manual 48 2 Remove the bracket from the tablet Figure 5 2 Removing the bracket 3 Detach the antenna cable from its connector on the main board Lenovo TAB 2 A8 50L LC only Figure 5 3 Detaching the antenna cable Lenovo TAB 2 A8 50L LC only ...

Page 53: ...he side key FPC from the front module of the tablet using a pair of tweezers Figure 5 4 Detaching the side key FPC 5 Remove the mylar on the main FPC at the main board side Figure 5 5 Removing the mylar on the main FPC main board side ...

Page 54: ... Unlock the connector of the main FPC on the main board using a triangle paddle Figure 5 6 Unlocking the connector of the main FPC 7 Pull out the main FPC from its connector on the main board Figure 5 7 Pulling out the main FPC from the main board side ...

Page 55: ...c 9 Remove screws and as shown in the figure below Figure 5 9 The screws on the bracket Part No Screw quantity Color Torque Phillips flat head screw M1 4 3 0 for blue TP LCM assembly 5 Phillips flat head screw M1 4 3 5 for white TP LCM assembly 5 Silver N A Phillips flat head screw M1 4 2 5 1 Silver N A a b a b ...

Page 56: ...Lenovo TAB 2 A8 50 Hardware Maintenance Manual 52 10 Remove the bracket from the tablet Figure 5 10 Removing the bracket 11 Remove the screw gasket from the tablet Figure 5 11 Removing the screw gasket ...

Page 57: ...Lenovo TAB 2 A8 50 53 12 Lift up the main board assembly and remove it as shown in the figure below Figure 5 12 Removing the main board assembly Figure 5 13 The removed the main board assembly ...

Page 58: ... For access remove the following FRUs 1010 Rear cover with side key on page 34 1020 Battery pack on page 37 1 Remove the mylar on the main FPC at the main board side Figure 6 1 Removing the mylar on the main FPC main board side 2 Unlock the connector of the main FPC on the main board using a triangle paddle Figure 6 2 Unlocking the connector of the main FPC ...

Page 59: ...in board side 4 Detach the LTE antenna cable from the main board Lenovo TAB 2 A8 50L LC only 4 1 Remove screws and on the bracket as shown in the figure below Figure 6 4 The screws on the bracket Part No Screw quantity Color Torque Phillips flat head screw M1 4 2 5 2 Black N A Phillips flat head screw M1 4 2 5 1 Silver N A a b a b ...

Page 60: ...50 Hardware Maintenance Manual 56 4 2 Remove the bracket from the tablet Figure 6 5 Removing the bracket 4 3 Detach the LTE antenna cable from its connector on the main board Figure 6 6 Detaching the LTE antenna cable ...

Page 61: ... 4 Detach the LTE antenna cable from the front module of the tablet Figure 6 7 Detaching the LTE antenna cable 5 Remove the mylar on the connector of the main FPC Figure 6 8 Removing the mylar on the connector of the main FPC ...

Page 62: ...58 6 Unlock the connector of the main FPC on the front module of the tablet using a triangle paddle Figure 6 9 Unlocking the connector of the main FPC 7 Pull out the main FPC from its connector on the main board Figure 6 10 Pulling out the main FPC ...

Page 63: ...Lenovo TAB 2 A8 50 59 8 Remove the mylar and conductive fabric on the main FPC as shown in the figures below Figure 6 11 Removing the mylar Figure 6 12 Removing the conductive fabric ...

Page 64: ...Lenovo TAB 2 A8 50 Hardware Maintenance Manual 60 9 Detach the main FPC from the front module of the tablet Figure 6 13 Detaching the main FPC Figure 6 14 Detaching the main FPC ...

Page 65: ...bracket 11 Lift the bottom side speaker box and detach the vibrator from its seat as shown in the figure below Figure 6 16 Detaching the vibrator Part No Screw quantity Color Torque Phillips flat head screw M1 4 3 0 for blue TP LCM assembly 4 Phillips flat head screw M1 4 3 5 for white TP LCM assembly 4 Silver N A a a ...

Page 66: ... Hardware Maintenance Manual 62 12 Detach the microphone from its seat and the main FPC assembly has now been removed Figure 6 17 Detaching the microphone Figure 6 18 The removed the main FPC assembly Lenovo TAB 2 A8 50F ...

Page 67: ...Lenovo TAB 2 A8 50 63 Figure 6 19 The removed the main FPC assembly Lenovo TAB 2 A8 50L LC ...

Page 68: ...t apply to you This information could include technical inaccuracies or typographical errors Changes are periodically made to the information herein these changes will be incorporated in new editions of the publication Lenovo may make improvements and or changes in the product s and or the program s described in this publication at any time without notice The products described in this document ar...

Page 69: ...arantee that these measurements will be the same on generally available systems Furthermore some measurements may have been estimated through extrapolation Actual results may vary Users of this document should verify the applicable data for their specific environment Lenovo and the Lenovo logo are trademarks of Lenovo in the United States or other countries or both Other company product or service...

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