Lenovo YOGA Tablet 2-851F Hardware Maintenance Manual
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Lenovo YOGA Tablet 2-851F Hardware Maintenance Manual

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Hardware Maintenance Manual
YOGA Tablet 2-851F

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  • Page 1 YOGA TABLET 2 Hardware Maintenance Manual YOGA Tablet 2-851F...
  • Page 2 First Edition (Sep 2014) © Copyright Lenovo 2014. All rights reserved. LENOVO products, data, computer software, and services have been developed 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.

  • Page 3: Table Of Contents

    Checking the internal battery status..22 Related service information .......23 Security ............... 23 Power management .......... 23 Activating/Deactivating the Display ..23 Lenovo 851 ..........24 Specifications ............. 24 FRU replacement notices........26 Screw notices..........26 Removing and replacing an FRU....27 1010 Rear cover..........

  • Page 4: About This Manual

    This manual is intended only for trained servicers who are familiar with Lenovo products. Use this manual to troubleshoot problems effectively. Before servicing a Lenovo product, make sure to read all the information under “Safety information” on page 1 and “Important service information”...

  • Page 5: Safety Information

    Safety information Safety information This chapter presents the following safety information that you need to get familiar with before you service a Lenovo computer: • “General safety” on page 2 • “Electrical safety” on page 3 • “Safety inspection guide” on page 5 •...

  • Page 6: General Safety

    Lenovo 851 Hardware Maintenance Manual General safety Follow these rules below to ensure general safety: • Observe a good housekeeping in the area where the machines are put during and after the maintenance. • When lifting any heavy object: 1. Make sure that you can stand safely without slipping.

  • Page 7: Electrical Safety

    Safety information Electrical safety Observe the following rules when working on electrical equipments. Important: Use only approved tools and test equipments. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have rubber floor mats near their machines that contain small conductive fibers to decrease electrostatic discharges.
  • Page 8 Lenovo 851 Hardware Maintenance Manual • Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors, nongrounded power extension cables, power surges, and missing safety grounds. • Do not touch live electrical circuits with the reflective surface of a plastic dental mirror.

  • Page 9: Safety Inspection Guide

    4. Check for cracked or bulging batteries. 5. Remove the cover. 6. Check for any obvious non-Lenovo alterations. Use good judgment as to the safety of any non-Lenovo alterations. 7. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage.

  • Page 10: Handling Devices That Are Sensitive To Electrostatic Discharge

    Lenovo 851 Hardware Maintenance Manual Handling devices that are sensitive to electrostatic discharge Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge.

  • Page 11: Safety Notices: Multilingual Translations

    Safety information Safety notices: multilingual translations The safety notices in this section are provided in English, French, German, Hebrew, Italian, Japanese, and Spanish. Safety notice 1 Before the computer is powered on after FRU replacement, make sure all screws, springs, and other small parts are in place and are not left loose inside the computer.
  • Page 12 Lenovo 851 Hardware Maintenance Manual Safety notice 2 DANGER Some standby batteries contain a small amount of nickel and cadmium. Do not disassemble a standby battery, recharge it, throw it into fire or water, or short-circuit it. Dispose of the battery as required by local ordinances or regulations.
  • Page 13 Safety information Safety notice 3 DANGER The battery pack contains small amounts of nickel. Do not disassemble it, throw it into fire or water, or short-circuit it. Dispose of the battery pack as required by local ordinances or regulations. Use only the battery in the appropriate parts listing when replacing the battery pack.
  • Page 14 Lenovo 851 Hardware Maintenance Manual Safety notice 4 DANGER The lithium battery can cause a fire, an explosion, or a severe burn. Do not recharge it, remove its polarized connector, disassemble it, heat it above 100°C (212°F), incinerate it, or expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations.
  • Page 15 Safety information Safety notice 5 If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your hands, immediately wash the affected areas with water at least for 15 minutes. Seek medical care if any symptoms caused by the fluid are present after washing.
  • Page 16 Lenovo 851 Hardware Maintenance Manual Safety notice 6 DANGER To avoid shock, do not remove the plastic cover that protects the lower part of the inverter card. Afin d’éviter tout risque de choc électrique, ne retirez pas le cache en plastique protégeant la partie inférieure de la carte d’alimentation.
  • Page 17 Safety information Safety notice 8 DANGER Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any interconnecting cables. Avant de retirer une unité remplaçable en clientèle, mettez le système hors tension, débranchez tous les cordons d’alimentation des socles de prise de courant, retirez la batterie et déconnectez tous les cordons d’interface.

  • Page 18: Laser Compliance Statement

    Lenovo 851 Hardware Maintenance Manual Laser compliance statement Some models of Lenovo computer are equipped from the factory with an optical storage device such as a CD-ROM drive or a DVD-ROM drive. Such devices are also sold separately as options. If one of these drives is installed, it is certified in the U.S.
  • Page 19 Safety information A CD-ROM drive, a DVD-ROM drive, or any other storage device installed may contain an embedded Class 3A or Class 3B laser diode. Note the following: DANGER Emits visible and invisible laser radiation when open. Do not stare into the beam, do not view directly with optical instruments, and avoid direct exposure to the beam.

  • Page 20: Important Service Information

    To download software fixes, drivers, and BIOS, follow the steps below: 1. Go to http://consumersupport.lenovo.com/. 2. Enter a serial number or select a product or use Lenovo smart downloading. 3. Select the BIOS/Driver/Applications and download. 4. Follow the directions on the screen and install the necessary software.

  • Page 21: Important Notice For Replacing A System Board

    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: •...

  • Page 22: Important Information About Replacing Rohs Compliant Frus

    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.

  • Page 23: General Checkout

    General checkout General checkout This chapter presents the following information: • “What to do first” on page 20 • “Power system checkout” on page 21 Before you go to the checkout, make sure to read the following important notes: Important notes: •...

  • Page 24: What To Do First

    Lenovo 851 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.

  • Page 25: Power System Checkout

    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.

  • Page 26: Checking The Internal Battery Status

    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 bar and then touch Settings.

  • Page 27: Related Service Information

    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 SECURITY, SIM CARD LOCK (LTE version only), PASSWORDS, DEVICE ADMINISTRATION and CREDENTIAL STORAGE.

  • Page 28: Lenovo 851

    • “FRU replacement notices” on page 26 • “Removing and replacing an FRU” on page 27 • “Locations” on page 76 • “Parts list” on page 78 Specifications The following table lists the specifications of the Lenovo tablet. Table 1. Specifications Feature Description Size &...
  • Page 29 Lenovo 851 Ports • Micro-USB (USB 2.0) • Audio Jack, 3.5mm • Micro-SD card slot (support external Micro-SD card up to 64GB) Communication • WiFi: 802.11a/b/g/n • Bluetooth 4.0 • GPS Others • Speaker (Left and right) • Microphone • Gravity sensor •...

  • Page 30: 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 Lenovo computers, this problem is addressed with special nylon-coated screws that have the following characteristics: •...

  • Page 31: Removing And Replacing An Fru

    Lenovo 851 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.

  • Page 32: 1010 Rear Cover

    Lenovo 851 Hardware Maintenance Manual 1010 Rear cover 1. Open the hinge frame. Figure 1-1. Opening the hinge frame 2. Open the card slot cover using a thin flat blade or guitar pick. Figure 1-2. Opening the card slot...
  • Page 33 Lenovo 851 3. Remove screws on the rear cover as shown in the figure below. Figure 1-3. The screws on the rear cover Part No. Screw (quantity) Color Torque Phillips flat head screw, M1.4 × 1.6 (3) Silver 4. Separate the bottom right corner of the rear cover from the main body of the tablet using a suction tool as shown in the figure below.
  • Page 34 Lenovo 851 Hardware Maintenance Manual 5. Hold the tablet in one hand and use a guitar pick to unlock the rear cover from the tablet along the joint line as shown in the figure below. Figure 1-5. Unlocking the rear cover from the main body (along the joint line)

  • Page 35: 1020 Right Speaker

    Lenovo 851 1020 Right speaker For access, remove the following FRU: • “1010 Rear cover” on page 28 1. Disconnect the power supply to the tablet by detaching the battery FPC from its connector on the main board using a pair of tweezers.
  • Page 36 Lenovo 851 Hardware Maintenance Manual Part No. Screw (quantity) Color Torque Phillips flat-head screw, M1.4 × 2.5 (3) Silver 3. Detach the connector of the right speaker FPC from the sub board using a pair of tweezers. Figure 2-3. Detaching the FPC connector of the right speaker 4.
  • Page 37 Lenovo 851 5. Remove the right speaker. Figure 2-5. The removed right speaker...

  • Page 38: 1030 Sub Board

    Lenovo 851 Hardware Maintenance Manual 1030 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.
  • Page 39 Lenovo 851 2. Pull out the hall sensor FPC from its connector using a pair of tweezers. Figure 3-2. Pulling out the hall sensor FPC 3. Detach the connector of the main FPC from the sub board using a pair of tweezers.
  • Page 40 Lenovo 851 Hardware Maintenance Manual 4. Remove screws on the sub board. Figure 3-4. The screws on the sub board Part No. Screw (quantity) Color Torque Phillips flat head screw, M1.4 × 1.6, wide Silver head (3) 5. Remove the sub board from the tablet using a pair of tweezers.
  • Page 41 Lenovo 851 Figure 3-6. The removed sub board...

  • Page 42: 1040 Lcd Fpc

    Lenovo 851 Hardware Maintenance Manual 1040 LCD FPC For access, remove the following FRUs in order: • “1010 Rear cover” on page 28 1. Unlock the connector of the LCD FPC on the front module of the tablet using a guitar pick.
  • Page 43 Lenovo 851 3. Pull out the LCD FPC from its connector on the main board using a pair of tweezers. Figure 4-3. Pulling out the LCD FPC (from the main board side) 4. Detach the LCD FPC from the front module using a pair of tweezers.
  • Page 44 Lenovo 851 Hardware Maintenance Manual 5. Pull out the LCD FPC from its connector on the front module using a pair of tweezers. Figure 4-5. Pulling out the LCD FPC (from the front module side) Figure 4-6. The removed LCD FPC...

  • Page 45: 1050 Main Fpc

    Lenovo 851 1050 Main FPC For access, remove the following FRU: • “1010 Rear cover” on page 28 1. Disconnect the power supply to the tablet by detaching the battery FPC from its connector on the main board using a pair of tweezers.
  • Page 46 Lenovo 851 Hardware Maintenance Manual 3. Detach the connector of the main FPC from the main board using a pair of tweezers. Figure 5-3. Detaching the connector of the main FPC (on the main board) 4. Remove the main FPC.
  • Page 47 Lenovo 851 Figure 5-5. The removed main FPC...

  • Page 48: 1060 Hall Sensor Fpc

    Lenovo 851 Hardware Maintenance Manual 1060 Hall sensor FPC For access, remove the following FRU: • “1010 Rear cover” on page 28 1. Disconnect the power supply to the tablet by detaching the battery FPC from its connector on the main board using a pair of tweezers.
  • Page 49 Lenovo 851 3. Pull out the hall sensor FPC from its connector using a pair of tweezers. Figure 6-3. Pulling out the hall sensor FPC 4. Remove the hall sensor FPC using a pair of tweezers. Figure 6-4. Removing the hall sensor FPC...
  • Page 50 Lenovo 851 Hardware Maintenance Manual Figure 6-5. The removed hall sensor FPC...

  • Page 51: 1070 Main Board

    Lenovo 851 1070 Main 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.
  • Page 52 Lenovo 851 Hardware Maintenance Manual 2. Pull out the TP FPC from its unlocked connector using a pair of tweezers. Figure 7-2. Pulling out the TP FPC 3. Unlock the connector of the left speaker FPC on the main board using a guitar pick.
  • Page 53 Lenovo 851 4. Pull out the FPC of the left speaker from the unlocked connector using a pair of tweezers. Figure 7-4. Pulling out the FPC of the left speaker 5. Detach the connector of the USB and volume key FPC from the main board using a pair of tweezers.
  • Page 54 Lenovo 851 Hardware Maintenance Manual 6. Detach the connector of the rear camera FPC from the main board using a pair of tweezers. Figure 7-6. Detaching the connector of the rear camera FPC 7. Remove screws on the main board as shown in the figure below.
  • Page 55 Lenovo 851 8. Disconnect the cable of the antennas from its connector on back of the main board using a pair of tweezers at the positions shown in the figure below. Figure 7-8. Positions for disconnecting the antennas 9. Remove the main board together with the attached front camera and main FPC.
  • Page 56 Lenovo 851 Hardware Maintenance Manual 10. Detach the connector of the main FPC on the main board using a pair of tweezers. Figure 7-10. Detaching the connector of the main FPC (on the main board) 11. Remove the main FPC from the main board...
  • Page 57 Lenovo 851 12. Unlock the connector of the front camera FPC on the back of main board using a guitar pick. Figure 7-12. Unlocking the connector of the front camera FPC 13. Remove the front camera FPC from its unlocked connector.
  • Page 58 Lenovo 851 Hardware Maintenance Manual Figure 7-14. The removed main board and front camera...

  • Page 59: 1080 Left Speaker

    Lenovo 851 1080 Left speaker For access, remove the following FRUs in order: • “1010 Rear cover” on page 28 • “1070 Main board” on page 47 1. Remove screws on the left speaker as shown in the figure below.
  • Page 60 Lenovo 851 Hardware Maintenance Manual 2. Remove the left speaker unit together with the attached rear camera, USB and volume key FPC. Figure 8-2. Removing the left speaker together with attached rear camera and USB and volume key FPC Figure 8-3. The removed left speaker together with attached rear camera and USB and volume...
  • Page 61 Lenovo 851 3. Detach the conductive shield at the side of the rear camera using a pair of tweezers as shown in the figure below. Figure 8-4. Detaching the conductive shield at the side of the rear camera 4. Remove the rear camera from its conductive shield seat on the left speaker unit as shown in the figure below.
  • Page 62 Lenovo 851 Hardware Maintenance Manual 5. Remove the USB and volume key FPC on the back of the left speaker unit using a pair of tweezers. Figure 8-6. Removing the USB and volume key FPC Figure 8-7. The removed left speaker...

  • Page 63: 1090 Rear Camera

    Lenovo 851 1090 Rear camera For access, remove the following FRUs in order: • “1010 Rear cover” on page 28 • “1070 Main board” on page 47 Detach the following FRU: • Left Speaker (see Step 1 on page 55 and Step 2 on page 56 in “1080 Left speaker”)
  • Page 64 Lenovo 851 Hardware Maintenance Manual 2. Remove the rear camera from its conductive shield seat on the left speaker box by as shown in the figure below. Figure 9-2. Removing the rear camera Figure 9-3. The removed rear camera...

  • Page 65: 1100 Usb And Volume Key Fpc

    Lenovo 851 1100 USB and volume key FPC For access, remove the following FRUs in order: • “1010 Rear cover” on page 28 • “1070 Main board” on page 47 Detach the following FRU: • Left Speaker (see Step 1 on page 55 and Step 2 on page 56 in “1080 Left speaker”)
  • Page 66 Lenovo 851 Hardware Maintenance Manual 2. Remove the USB and volume key FPC from the left speaker. Figure 10-2. The removed USB and volume key FPC...

  • Page 67: 1110 Volume Key

    Lenovo 851 1110 Volume key For access, remove the following FRUs in order: • “1010 Rear cover” on page 28 • “1070 Main board” on page 47 Detach the following FRU: • Left speaker (see Step 1 on page 55 and Step 2 on page 56 in “1080 Left speaker”)

  • Page 68: 1120 Wifi2 Antenna

    Lenovo 851 Hardware Maintenance Manual 1120 WIFI2 antenna For access, remove the following FRU: • “1010 Rear cover” on page 28 • “1070 Main board” on page 47 1. Remove screw on the WIFI2 antenna as shown in the figure below.
  • Page 69 Lenovo 851 2. Remove the WIFI2 antenna. Figure 12-2. The removed antenna...

  • Page 70: 1130 Gps/Wifi1 Antenna

    Lenovo 851 Hardware Maintenance Manual 1130 GPS/WIFI1 antenna For access, remove the following FRU: • “1010 Rear cover” on page 28 • “1070 Main board” on page 47 1. Remove screw on the GPS/WIFI1 antenna as shown in the figure below.
  • Page 71 Lenovo 851 2. Remove the GPS/WIFI1 antenna. Figure 13-2. The removed antenna...

  • Page 72: 1140 Windows Key

    Lenovo 851 Hardware Maintenance Manual 1140 Windows key For access, remove the following FRU: • “1010 Rear cover” on page 28 • “1020 Right speaker” on page 31 1. Detach the windows key using a pair of pointed tweezers. Figure 14-1. Detaching the windows key 2.

  • Page 73: 1150 Battery Pack

    Lenovo 851 1150 Battery pack For access, remove the following FRUs in order: • “1010 Rear cover” on page 28 • “1020 Right speaker” on page 31 Rechargeable Battery Notice CAUTION: Risk of explosion if the battery is replaced with an incorrect type.
  • Page 74 Lenovo 851 Hardware Maintenance Manual 2. Slowly pull out the hinge pivot using a pair of tweezers. Figure 15-2. Pulling out the hinge pivot Figure 15-3. The removed hinge pivot...
  • Page 75 Lenovo 851 3. Detach the hinge frame at the left end, turn the hinge frame clockwise around its right end so as to steer the battery FPC out through the supporting frame at the right end, and then remove the hinge frame from the main body of the tablet.
  • Page 76 Lenovo 851 Hardware Maintenance Manual 5. Remove screw on the battery cover as shown in the figure below. Figure 15-6. The screw on the battery cover Part No. Screw (quantity) Color Torque Phillips flat-head screw, M1.4 × 3.0 (1) Silver 6.
  • Page 77 Lenovo 851 7. Remove the battery pack from the hinge frame. Figure 15-8. Removing the battery pack Figure 15-9. The removed battery pack...

  • Page 78: 1160 Power Key

    Lenovo 851 Hardware Maintenance Manual 1160 Power key For access, remove the following FRUs in order: • “1010 Rear cover” on page 28 • “1070 Main board” on page 47 Detach the following FRU: • Left speaker (see Step 1 on page 55 and Step 2 on page 56 in “1080 Left speaker”)
  • Page 79 Lenovo 851 2. Remove the power key. Figure 16-2. The removed power key...

  • Page 80: Locations

    Lenovo 851 Hardware Maintenance Manual Locations Front view Front camera Left speaker Right speaker...

  • Page 81: Rear View

    Lenovo 851 Rear view Audio Jack Windows key Microphone Micro-SD card slot Volume key Micro-USB connection Rear camera Power key...

  • Page 82: Parts List

    Lenovo 851 Hardware Maintenance Manual Parts list This section presents the following service parts: • “Overall” on page 78 • “Screws” on page 82 Overall...
  • Page 83 Lenovo 851...
  • Page 84 Lenovo 851 Hardware Maintenance Manual Table 1. Parts list–Overall FRU No. CRU ID 851 front module (TP LCM assembly) 5D69A6N368 5D69A6N4KH 5D69A6N2YU 851 rear cover 5S59A6N366 851 battery 5B19A6MWSH (battery cell) 5B19A6N367 (battery pack) 851 hinge frame 5M89A6MXJP (black) 5M89A6N049...
  • Page 85 Lenovo 851 851 hall sensor FPC 5F79A6MX4D 5F79A6MXBH 851 volume key 5B69A6MXHT 5B69A6N07S 851 battery cover (left) 5D79A6MXKT (black)

  • Page 86: Screws

    Lenovo 851 Hardware Maintenance Manual Screws Table 2. Parts list–Screw CRU ID × 2.5 Phillips cross head screw, M1.4 SM89A44142 × 3.0 Phillips cross head screw, M1.4 SM89A44143 Phillips cross head screw, M1.4 × 1.5 5M89A4675Y × 1.6 Phillips cross head screw, M1.4...

  • Page 87: Notices

    The result obtained in other operating environments may vary. Lenovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.

  • Page 88: Trademarks

    Users of this document should verify the applicable data for their specific environment. Trademarks Lenovo and the Lenovo logo are trademarks of Lenovo in the United States or other countries, or both. Other company, product, or service names may be trademarks or service marks...

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