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Lenovo VIBE Z K910L Service Manual
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Lenovo VIBE Z K910L Service Manual

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WW Service TS
VIBE Z K910L
Service Manual
LENOVO
1

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Summary of Contents for Lenovo VIBE Z K910L

  • Page 1 WW Service TS VIBE Z K910L Service Manual LENOVO...
  • Page 2 This handbook is appropriate for the Level 2 maintenance operator of K860 mobile phone. When out-of-range this handbook, please contact with the customer support department or the research and development center of Lenovo mobile communication technology co., LTD. Thank you!

  • Page 3: Table Of Contents

    4.10 Calling receiver has no sound ..................43 4.11 Display color distortion ....................45 4.12 Speaker tone distortion ....................47 4.13 Speaker tone smaller ....................49 4.14 No charging ......................... 50 How to assemble and dissemble LENOVO K910L ..............41...

  • Page 4: Technical Specifications

    WW Service TS 1. Technical Specifications Equipment LTE Digital Mobile Telephone Name Lenovo K910L Trade Name Model Lenovo Number ITEM TRADE / MODEL DESCRIPTION Key Part of Host MSM8974 4 Krait CPU 2.3GHz, 2M L2 cache MSM8974 QDSP6 600MHz Graphics Display 5.5"...
  • Page 5 WW Service TS composed of WTR1605L and related digital circuit. The following figure is a block diagram of the hardware design system. The hardware of K910L is composed of the main board, USB, P-Sensor, volume key FPC. As shown below. following figure is marked major chip and functional distribution on the...
  • Page 6 WW Service TS main board.

  • Page 7: Application Processor

    WW Service TS 4. Application processor 4.1.1 General Description Feature MSM8974 capability Processors Applications Four Krait uP cores up to 2+ GHz; 2 MB L2 cache Modem system QDSP6 v5 core at up to 600 MHz 16k L1 instruction; 32k L1 data; 256k L2 caches RPM system Cortex M3 - primary boot processor –...
  • Page 8 WW Service TS Color depth – 24-bit pp; TFT, LTPS, CSTN, OLED panels General display features Camera interfaces Qcamera; dual ISP MIPI_CSI Three 4-lane or four at 4 + 4 + 1 + 1 lanes; 1.5 Gbps per lane 2D performance 32 MP at 15 fps;...
  • Page 9 WW Service TS Webkit browser JPEG hardware decode acceleration Networking Stack IP and HTTP tuning Flash 10.1 & Video Processor decode optimization Messaging Text messages; text encoding for SMS Multimedia messaging services – combined video (MPEG4), still image (JPEG), voice tag (AMR), text sent as message Digital Mobile Broadcast (DMB) External IC required;...
  • Page 10 WW Service TS SEE, Crypto engine secure debug, Microsoft WM DRM10, HDCP for HDMI V4; algorithm accelerate file system encryption (AES-XTS) QFPROM and IPSec & SSL (HMAC-SHA, CCM, CBCMAC) Large fuse array, replaces previous-generation Qfuse chains Security controller Non-volatile memory with faster and simpler programming Chip-wide configuration for security, feature enable, &...
  • Page 11 WW Service TS Fabrication technology and package Digital die 28 nm HPm CMOS Small, thermally efficient 990 PNSP: 15 x 15 x 0.91 mm (w/o memory device on top) package Bottom pin array of PoP Same as 990-pin nanoscale pkg (990 NSP); 0.4 mm pitch Top pin array of PoP Same as 216-pin chipscale pkg (216 CSP);...

  • Page 12: Power Management

    WW Service TS 5. Power Management 5.1.1 Block Diagram PM8941 have five major functional blocks: 1) Input power management 2) Output power management 3) General housekeeping 4) User interfaces 5) IC-level interfaces PM8841 have two major functional blocks: 1) Output power management 2) IC-level interfaces...
  • Page 13 WW Service TS 5.1.2 General Features Summary of PM8941 & PM8841 Features: Feature PM8941 capability PM8841 capability Input power management Supported external power sources USB and/or wall charger Over-voltage protection Fully integrated up to +28 V (integrated OVP FET) Wall charger Fully integrated up to +15 V (integrated OVP FET);...
  • Page 14 WW Service TS constant voltage modes More automated for less software interaction ATC indicator supply Voltage options when RGB_RED driver is used for ATC indication Battery MOSFET Integrated Voltage, current, & thermal Internal and external nodes; sensors reported to on-chip state-machine Battery monitoring system Including battery fuel gauge...
  • Page 15 WW Service TS except KPD_PWR_N, and turns VREG_FAULT on 19.2 MHz oscillator support XO (with on-chip ADC) XO controller and XO outputs 5 sets: 3 low-noise outputs (A) and 2 low-power outputs Differential XO clock output Special purpose clock outputs Extra sleep clock;...
  • Page 16 WW Service TS IC-level interfaces Primary status and control 2-line SPMI 2-line SPMI PMIC control Power-on, resets, and shared Power-on, resets, and shared SPMI SPMI Interrupt managers Supported by SPMI Supported by SPMI Optional hardware configurations OPT bits select hardware OPT bits select hardware configuration configuration...
  • Page 17 WW Service TS 5.1.3 The Power on Sequence...

  • Page 18: Audio Codec

    WW Service TS 6. Audio Codec 6.1.1 Block Diagram WCD9320 have four major functional blocks: 1) Rx processing 2) Tx processing 3) Additional processing (noise cancellation, etc.) 4) Shared support functions 7. Wireless Connectivity WCN3680 have four major WCN functional blocks 1) Bluetooth radio 2) WLAN RF transceiver 3) FM radio...

  • Page 19: Lte Rf Transceiver

    WW Service TS 8. LTE RF Transceiver WTR1605L have three major functional blocks: 1) RF transmitters 2) RF receivers 3) Shared support circuits...
  • Page 20 WW Service TS Summary of WTR1605/WTR1605L Features: Feature WTR1605/WTR1605L capability RF operating bands See next page Air interfaces See modem IC documentation for details GSM Rel ‘99, GPRS, EDGE with DTM CDMA 1X, 1X Advanced, 1xEV-DOr0/rA/rB WCDMA Rel ‘99, HSDPA, HSUPA, HSPA+, DC-HSPA+ WCDMA 1.4 to 20 MHz;...
  • Page 21 WW Service TS Advanced Rx operation Mobile receive diversity CDMA, WCDMA, and LTE SHDR CDMA IntelliCeiver CDMA Dual SSBI Efficient initialization, status, and control Fabrication technology 65 nm RF CMOS Small, thermally efficient package 142 WLNSP: 4.91 × 5.47 × 0.63 mm; 0.4 mm pitch WTR1605/WTR1605L Air Interface Summary:...

  • Page 22: Main Board And Sub Fpc Layout Introduction

    WW Service TS 9. Main board and Sub FPC layout introduction 10. Main board top view...

  • Page 23: Main Board Bottom View

    WW Service TS 11. Main board bottom view 12. Sub FPC top view...

  • Page 24: Sub Fpc Bottom View

    WW Service TS 13. Sub FPC bottom view...

  • Page 25: Troubleshooting Procedure

    WW Service TS 14. Troubleshooting Procedure 15. No Boot Cannot boot Check whether the power If change the power key FPC, button FPC assembly is good? then the phone can power on, the root cause is FPC. Change the power key FPC? Power on the alone PCBA, which be provided PCBA is bad, power by power monitor.
  • Page 26 WW Service TS Change CPU chip U100...

  • Page 27: Touch Panel Have No Effect

    WW Service TS 16. Touch panel have no effect Touch panel have no effect Touch panel is not Touch panel good, change it. is not normal Heat the touch panel The SMT of touch panel connector connector and EMI and EMI filter is not normal? filter.

  • Page 28: Charging Anomaly

    WW Service TS 17. Charging anomaly 17.1.1 The charger is plugged in, without charging display The charger is plugged in, without charging display Whether the charging is normal after Replace the charger replace the charger or USB line? Whether the charging is normal after Replace the battery replace the battery? Measure the battery voltage, whether it is less than 3V?
  • Page 29 WW Service TS...
  • Page 30 WW Service TS 17.1.2 Connecting the phone and computer through USB line, but not any new device was found in the computer Connecting the phone and computer through line, but not any new device was found in the computer. Whether the charging is normal after Replace the charger replace the charger or USB line? Whether the charging is normal after...

  • Page 31: Calling Receiver Sound Has Poor Quality

    WW Service TS 18. Calling receiver sound has poor quality Calling receiver sound has poor quality Measure the resistance of Replace the receiver, value receiver. 32ohm? Check whether the contact is good between receiver spring and contact point. Re assemble the receiver and whether the phone work is good.

  • Page 32: Speaker Has No Sound

    WW Service TS 19. Speaker has no sound...
  • Page 33 WW Service TS Speaker has no sound Replace the speaker, and then does the phone work normal? Whether the speaker spring is normal? Replace the Replace the Sub FPC, and then Sub FPC. does the phone work normal? Checks the SMT quality of these components include the L201, L202 on the Sub FPC and R2220, R2221, J2307 on...

  • Page 34: No Screen Display

    WW Service TS 20. No screen display 20.1.1 Power on and no screen display White or black screen and have no display, backlight is good. The SMT of LCD connector (UJ1801) and EMI filter (E1810) is not normal? Replace the LCD，whether the screen display is normal? Checks the SMT quality of these EMI filter include the E1807, E1809, E1810,...
  • Page 35 WW Service TS 20.1.2 LCD has no backlight...
  • Page 36 WW Service TS LCD has no backlight Check whether the connection status between module FPC connector and the motherboard connector normal, and reconnect the connector whether the phone is working normal. Replace the LCD module, and make sure whether the LCD has the backlight.

  • Page 37: Phone Crash

    WW Service TS 21. Phone crash...
  • Page 38 WW Service TS Phone crash Connecting phone computer through USB line, Download software check whether some new device was found in the computer. Check the 19.2MHz crystal is Heat the crystal normal? then try it again. Heat the PMIC Check PMIC provide power or change the supply to CPU and EMMC PMIC.

  • Page 39: Key Has No Effect

    WW Service TS 22. Key has no effect...
  • Page 40 WW Service TS Key has no effect Check whether the connection status between the key FPC and the motherboard connector is normal, reconnect connector whether the phone is working normal. Press the key button, make Replace the sure whether the key signal key FPC line short to ground net.

  • Page 41: Communication Signal Abnormality

    WW Service TS 23. Communication signal abnormality...
  • Page 42 WW Service TS Communication signal abnormality Boot into the engineer test mode to make sure whether Write the SN or the phone has the SN or IMEI number. IMEI number. Check whether connection status between the ANT cable and the RF reconnect the connector is normal, and connector...

  • Page 43: Calling Receiver Has No Sound

    WW Service TS 24. Calling receiver has no sound...
  • Page 44 WW Service TS Calling receiver has no sound Measure the resistance of Replace the receiver, is the value 32ohm? receiver. Check whether the contact is good between receiver spring and contact point. Re assemble the receiver and whether the phone work is good. Checks the SMT quality of these components include the L2204 and L2205.

  • Page 45: Display Color Distortion

    WW Service TS 25. Display color distortion...
  • Page 46 WW Service TS Display color distortion The SMT of LCD connector (UJ1801) and EMI filter (E1810) is not normal? Replace the LCD，whether the screen display is normal? Checks the SMT quality of these EMI filter include the E1807, E1809, E1810, E1816, and E1817.

  • Page 47: Speaker Tone Distortion

    WW Service TS 26. Speaker tone distortion...
  • Page 48 WW Service TS Speaker tone distortion Replace the speaker, and then does the phone work normal? Whether the speaker spring is normal? Replace the Replace the Sub FPC, and then Sub FPC. does the phone work normal? Checks the SMT quality of these components include the L201, L202 on the Sub FPC and R2220, R2221, J2307 on...

  • Page 49: Speaker Tone Smaller

    WW Service TS 27. Speaker tone smaller Speaker tone smaller Download software, whether the audio parameter had been lost. Replace the speaker, and then does the phone work normal? Whether the speaker spring is normal? Replace the Replace the Sub FPC, and then Sub FPC.

  • Page 50: No Charging

    WW Service TS 28. No charging No charging Whether the charging is normal after replace the charger or USB line? Whether the charging is normal after replace the battery? Measure the battery voltage, whether it is less than 3V? Checks the SMT quality of these components include the PMU PM8941 (U1001), USB connecter (J2307), and the peripheral parts.

  • Page 51: How To Assemble And Dissemble Lenovo K910L

    WW Service TS 5 How to assemble and dissemble LENOVO K910L 1．Take out the sim-tray from the right side. 2. Start from the hole of sim-tray, along the gap take off the battery door with “teardown pice”. As shown in figure: 3．Take off the “graphite sheet”、...
  • Page 52 WW Service TS 5，Take off two screws on board, take off the fpc for tp and volumkey, get the board. 6、Now we can take off such parts:VOLUMKEY-FPC/RECEIVER/CAMERAS(FRONT AND BACK)/SPK-BOX/FPC-ANTTENER/MAIN-FPC/SUB-TOPFPC/CABLE and so on.

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