Lenovo VIBE Z K910L, Service Manual

Page 1: ...WW Service TS 1 VIBE Z K910L Service Manual LENOVO ...

Page 2: ...ssional maintenance tools are required to solve various fault any a components of the phone can be modified Level 3 maintenance is mainly to solve the problem that the secondary maintenance can t solves this problem will be solved by the research and development center Important declaration This handbook applies to the experienced techniques who familiar with the similar equipment it mainly as the...

Page 3: ...3 Sub FPC top view 23 3 4 Sub FPC bottom view 24 4 Troubleshooting Procedure 25 4 1 No Boot 25 4 2 Touch panel have no effect 27 4 3 Charging anomaly 28 4 4 Calling receiver sound has poor quality 31 4 5 Speaker has no sound 32 4 6 No screen display 34 4 7 Phone crash 37 4 8 Key has no effect 39 4 9 Communication signal abnormality 41 4 10 Calling receiver has no sound 43 4 11 Display color distor...

Page 4: ...0mA WWAN Module WWAN Module LTE WLAN Module WLAN Module WLAN Supports 802 11b g n Frequency MHz 2412 2472 5170 5805 Ant Type Internal Bluetooth Module BT Module 1 BT Supports BluetoothV2 0 EDR Frequency MHz 2402 2480 Ant Type Internal 2 Working Principle 3 General Description The hardware system of K910L includes PMU AP and wireless connectivity audio codec and LTE RF transceiver The PMU is compos...

Page 5: ...ital 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 The following figure is marked major chip and functional distribution on the ...

Page 6: ...WW Service TS 6 main board ...

Page 7: ...port Internal memory via PoP EBI 2x LPDDR3 SDRAM 32 bit wide up to 800 MHz Other internal memory 1 5 MB unified SRAM pool on chip memory OCMEM External memory Via SDC1 Via SPI eMMC NAND flash devices NOR memory devices user modified SW RF support RF operating bands Defined by WTR device Air interfaces GSM CDMA WCDMA TD SCDMA LTE WLAN BT FM See Air interface features section for details Yes all Yes...

Page 8: ...ics Adreno 330 450 MHz 3D graphics accelerator 225 M peak triangles sec 3600 M peak 3D pixels sec APIs include OpenGL ES 1 1 2 0 3 0 OpenCL1 2 DX9 3 Audio Codec Low power audio Voice codec support Audio codec support Enhanced audio Integrated within the WCD9320 device 7 DACs 8 outputs 6 inputs 6 ADCs 6 digital MICs Multi button headset control MIC activity detection Low power low complexity 7 1 su...

Page 9: ...w power low processor loading Secure digital interfaces SDC1 and SDC2 are dual V Up to 4 ports one 8 bit and three 4 bit SD3 0 SD MMC card eMMC NAND DMB WLAN eSD eMMC boot TSIF Up to two ports DMB support Audio interfaces SLIMbus I2S MI2S PCM Highly multiplexed high speed baseline WCD interface Up to 4 ports primary seconday speakers mics Microphone speaker functions including 7 1 audio for HDMI O...

Page 10: ...p timers Inputs 19 2M CXO 48M WCN_XO for 5 GHz WLAN General purpose outputs M N counter PDM Resource and power manager Fundamental to bootup and power management Key blocks RPM core Cortex M3 security controller MPM Improved efficiency via clock control split rail power collapse voltage scaling several low power sleep modes Debug JTAG Design for Software Debug DFSD ETM all cores Others Thermal sen...

Page 11: ... thermally efficient package 990 PNSP 15 x 15 x 0 91 mm w o memory device on top 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 0 5 mm pitch 4 1 2 Block Diagram The following block diagram of MSM8974 ...

Page 12: ...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: ... Wall charger Fully integrated up to 28 V integrated OVP FET Fully integrated up to 15 V integrated OVP FET external pass device is supported for higher voltage Supported battery technologies Lithium ion lithium ion polymer Charger regulation method Efficient switched mode battery charger 4 control loops USB in current VCHG in voltage VPH_PWR out voltage battery current Supported charging modes Tr...

Page 14: ... Boost 5V Three two at 2 0 A each one at 1 0 A One at 1 0 A Two one at 2 0 A one at 1 0 A Two each at 3 0 A Four each at 3 0 A Low dropout linear regulators 24 total NMOS at 1 2 A 3 300 mA 2 PMOS at 600 mA 4 300 mA 5 150 mA 6 50 mA 2 and 2 for clocks Pseudo capless LDO designs TBD of 24 LDOs Voltage switches Suitable for power gating external circuitry 3 at 1 8 V 2 at 5 V General housekeeping On c...

Page 15: ...its and alarms User interfaces 30 V WLED boost converter Generates supply voltage for white LEDs WLED sinks Three matched supports strings of up to 8 white LEDs each Keypad backlighting General purpose sources sinks that can be used for backlighting Camera flash drivers Two flash and torch modes RGB drivers Three one for each color 12 mA each Other current drivers MPPs can be configured to sink up...

Page 16: ...s Level translation ext regulator enables detect ins interrupt outs Level translation ext regulator enables detect ins interrupt outs Configurable I Os MPPs 8 configurable as digital ins or outs level translating bidirectional I O s analog multiplexer ins or VREF analog outs 4 configurable as digital ins or outs level translating bidirectional I O s analog mux ins or VREF analog outs GPIO pins 36 ...

Page 17: ...WW Service TS 17 5 1 3 The Power on Sequence ...

Page 18: ...or 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 4 Shared support circuits ...

Page 19: ...WW Service TS 19 8 LTE RF Transceiver WTR1605L have three major functional blocks 1 RF transmitters 2 RF receivers 3 Shared support circuits ...

Page 20: ...tails GSM Rel 99 GPRS EDGE with DTM 1X 1X Advanced 1xEV DOr0 rA rB WCDMA Rel 99 HSDPA HSUPA HSPA DC HSPA 1 4 to 20 MHz FDD and TDD 1605L only Bands 34 39 40 and 41 GNSS supported modes Standalone MS A MS B XTRA GPS GLONASS Integrated RF transceivers Transmit driver amp outputs Primary Rx LNA inputs Diversity Rx LNA inputs 9 7 4 Integrated GNSS RF receiver Dedicated circuits support GPS and GLONASS...

Page 21: ...ersity SHDR IntelliCeiver CDMA WCDMA and LTE CDMA 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 WTR1605LAir Interface Summary ...

Page 22: ...WW Service TS 22 9 Main board and Sub FPC layout introduction 10 Main board top view ...

Page 23: ...WW Service TS 23 11 Main board bottom view 12 Sub FPC top view ...

Page 24: ...WW Service TS 24 13 Sub FPC bottom view ...

Page 25: ...eck the battery connector SMT is normal Heat the battery connector then try it again Check whether the power button FPC assembly is good Change the power key FPC Y If change the power key FPC then the phone can power on the root cause is FPC Connect the phone to the computer through the USB line check the computer device manager if there is equipment pops up Y Download software and try power on it...

Page 26: ...WW Service TS 26 Y Change CPU chip U100 ...

Page 27: ...ffect Touch panel is not normal Touch panel is not good change it The SMT of touch panel connector and EMI filter is not normal Y N Heat the touch panel connector and EMI filter Change CPU chip U100 Using the oscilloscope the I2C controller line has signal output N N Y ...

Page 28: ...ter replace the battery Measure the battery voltage whether it is less than 3V Replace the battery Y N Checks the SMT quality of these components include the PMU PM8941 U1001 USB connecter J2307 and the peripheral parts Whether these parts are SMT good The phone is work good after heating these parts Y OK N Whether the charging is normal after replace the charger or USB line Y Replace the PMIC U10...

Page 29: ...WW Service TS 29 ...

Page 30: ...charging is normal after replace the charger or USB line Replace the charger Whether the charging is normal after replace the battery Measure the battery voltage whether it is less than 3V Replace the battery Checks the SMT quality of these components include the PMU PM8941 U1001 USB connecter J2307 and the peripheral parts Whether these parts are SMT good The phone is work good after heating thes...

Page 31: ...ality of these components include the L2204 and L2205 Whether these parts are SMT good The phone is work good after heating these parts Measure the resistance of receiver is the value 32ohm Check whether the contact is good between receiver spring and contact point Re assemble the receiver and whether the phone work is good Y OK Replace the receiver N Y ...

Page 32: ...WW Service TS 32 19 Speaker has no sound ...

Page 33: ...d R2220 R2221 J2307 on the main board Whether these parts are SMT good The phone is work good after heating these parts N Replace the speaker and then does the phone work normal Whether the speaker spring is normal Y OK Speaker has no sound N OK Y Replace the Sub FPC and then does the phone work normal Y Replace the Sub FPC N ...

Page 34: ...809 E1810 E1816 and E1817 Whether these parts are SMT good Whether the powers supply VREG_L12_1P8 LEDA LGD_VOUT_P and LGD_VOUT_N are normal OK Checks the SMT quality of LCD connector J1801 Whether these parts are SMT good The SMT of LCD connector UJ1801 and EMI filter E1810 is not normal N N Y OK Y Replace the LCD whether the screen display is normal N OK Y Y Heat these parts N Replace the CPU U10...

Page 35: ...WW Service TS 35 20 1 2 LCD has no backlight ...

Page 36: ...T quality of LCD backlight driver IC U1802 Whether these parts are SMT good Y N Y Y Check whether the connection status between the LCD module FPC connector and the motherboard connector is normal and reconnect the connector whether the phone is working normal N LCD has no backlight Replace the LCD module and make sure whether the LCD has the backlight OK Y N OK ...

Page 37: ...WW Service TS 37 21 Phone crash ...

Page 38: ...e PMIC Connecting the phone and computer through USB line check whether some new device was found in the computer N Phone crash N Download software Heat the crystal then try it again Check the 19 2MHz crystal is normal N Replace the memery U1601 whether the phone is working normal OK Y N Change CPU chip U100 ...

Page 39: ...WW Service TS 39 22 Key has no effect ...

Page 40: ...k whether the connection status between the key FPC and the motherboard connector is normal and reconnect the connector whether the phone is working normal Press the key button make sure whether the key signal line short to ground net N Replace the key FPC Y OK Y ...

Page 41: ...WW Service TS 41 23 Communication signal abnormality ...

Page 42: ...eck whether the connection status between the ANT cable and the RF connector is normal and reconnect the connector whether the phone is working normal Y reconnect the connector Y Write the SN or IMEI number Y Find the issue part according to the download tool message Check the modem circuit and whether the intermediate frequency is good N N Communication signal abnormality ...

Page 43: ...WW Service TS 43 24 Calling receiver has no sound ...

Page 44: ...receiver Check whether the contact is good between receiver spring and contact point Re assemble the receiver and whether the phone work is good N Checks the SMT quality of these components include the L2204 and L2205 Whether these parts are SMT good The phone is work good after heating these parts Replace the codec IC U2101 Y OK ...

Page 45: ...WW Service TS 45 25 Display color distortion ...

Page 46: ...e screen display is normal Checks the SMT quality of these EMI filter include the E1807 E1809 E1810 E1816 and E1817 Whether these parts are SMT good Whether the powers supply VREG_L12_1P8 LEDA LGD_VOUT_P and LGD_VOUT_N are normal N N Checks the SMT quality of LCD connector J1801 Whether these parts are SMT good Y Heat these parts N Replace the CPU U100 ...

Page 47: ...WW Service TS 47 26 Speaker tone distortion ...

Page 48: ... L202 on the Sub FPC and R2220 R2221 J2307 on the main board Whether these parts are SMT good The phone is work good after heating these parts N Replace the speaker and then does the phone work normal Whether the speaker spring is normal Y OK N OK Y Replace the Sub FPC and then does the phone work normal Y Replace the Sub FPC N ...

Page 49: ...uality of these components include the L201 L202 on the Sub FPC and R2220 R2221 J2307 on the main board Whether these parts are SMT good The phone is work good after heating these parts N Replace the speaker and then does the phone work normal Whether the speaker spring is normal Y OK N OK Y Replace the Sub FPC and then does the phone work normal Y Replace the Sub FPC N ...

Page 50: ...ether it is less than 3V Y N Checks the SMT quality of these components include the PMU PM8941 U1001 USB connecter J2307 and the peripheral parts Whether these parts are SMT good The phone is work good after heating these parts Y OK N Whether the charging is normal after replace the charger or USB line Y Replace the PMIC U1001 OK OK OK ...

Page 51: ...ide 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 holder for battery connector battery connector screws on rear housing As shown in figure 4 Tear the film along the appropriate line then take off the battery ...

Page 52: ... 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 ...