Lenovo A516 Service Manual
  1. Manuals
  2. Brands
  3. Lenovo Manuals
  4. Cell Phone
  5. A516
  6. Service manual

Lenovo A516 Service Manual

Hide thumbs Also See for A516:
Table of Contents

Advertisement

Quick Links

See also: User Manual
Service Manual of
Lenovo A516 Mobile
Phone
LENOVO

Advertisement

Table of Contents
loading

Related Manuals for Lenovo A516

Summary of Contents for Lenovo A516

  • Page 1 Service Manual of Lenovo A516 Mobile Phone LENOVO...
  • Page 2 The content of this manual will be upgraded according to the needs of technology development. Copyright The copyright of this manual belongs to Lenovo Mobile; anyone who reproduces this manual without written consent of the Company shall bear legal responsibility.

  • Page 3: Table Of Contents

    Repair Manual of Lenovo A516 Mobile Phone Content APPEARANCE ..........................6 LAYOUT OF MAIN BOARD ......................6 BASEBAND ........................... 9 ......................... 10 DISPLAY 3.1.1 No display on screen after power-on ................. 10 3.1.2 LCD backlight without lighting ..................11 ........................13 AMERA DEFECTS 3.2.1...
  • Page 4 Repair Manual of Lenovo A516 Mobile Phone 4.5.2 ILPC comprehensive test abnormal ..................36 4.5.3 FrequencyErr ........................36 STRUCTURE ASSEMBLY ......................37 ! З ШИБКА АКЛАДКА НЕ 5.1 A A516 ....О SSEMBLY PROCESS SEQUENCE OF ENOVO MAIN BODY ОПРЕДЕЛЕНА .. О...
  • Page 5 Prepared/ Version Prepared by/ Reason for Modified Main changes Modified by change...

  • Page 6: Appearance

    1. Appearance 2. Layout of main board Front of main board:...
  • Page 7 Repair Manual of Lenovo A516 Mobile Phone Back of main board:...
  • Page 8 Repair Manual of Lenovo A516 Mobile Phone...

  • Page 9: Baseband

    Repair Manual of Lenovo A516 Mobile Phone 3. Baseband Block diagram of hardware system...

  • Page 10: Lcd Display

    Repair Manual of Lenovo A516 Mobile Phone 3.1 LCD display 3.1.1 No display on screen after power-on White screen or blank screen without display; backlight with lighting Check whether the connection of LCD FPC is good and re-assembled FPC phone is normal...

  • Page 11: Lcd Backlight Without Lighting

    Repair Manual of Lenovo A516 Mobile Phone 3.1.2 LCD backlight without lighting LCD backlight without lighting Check whether the connection of FPC on LCD module and connector on main board is good and whether the LCD backlight is normal after reconnection Re-verify whether the LCD backlight is normal after replacing LCD.
  • Page 12 Repair Manual of Lenovo A516 Mobile Phone...

  • Page 13: Camera Defects

    Repair Manual of Lenovo A516 Mobile Phone 3.2 Camera defects 3.2.1 Rear camera defects Can not take photos Check to see whether the camera module is in the right position by disassembling and whether the module is OK after reassembling module...

  • Page 14: Front Camera Defects

    Repair Manual of Lenovo A516 Mobile Phone 3.2.2 Front camera defects Can not take photos Check to see whether the front camera abnormal After replacing it, Check whether camera module connector is well welded. Re-weld or replace Check whether the U1101...

  • Page 15: Ring And Vibration

    Repair Manual of Lenovo A516 Mobile Phone 3.3 Ring and vibration 3.3.1 No vibration No vibration Check whether the motor is interfered by structure; Recheck whether it is normal after reassembling the phone. Replace the motor or main FPC to see whether it is ok? Check to...

  • Page 16: No Ring

    Repair Manual of Lenovo A516 Mobile Phone 3.3.2 No ring No ring Replace Speaker and recheck whether it is normal? Check to see whether the SPK contact shrapnel is normal? Replace main FPC and check whether it is OK .

  • Page 17: Charging

    Repair Manual of Lenovo A516 Mobile Phone 3.4 Charging 3.4.1 No charging display after plugging the charger in No charging display after plugging the charger in Check whether the charging is normal Replace the charger after replacing the charger. Replace the battery and see whether the...

  • Page 18: Charging Shown But Not Full Charging

    Repair Manual of Lenovo A516 Mobile Phone 3.4.2 Charging shown but not full charging Charging shown but not full charging Replace the battery and then check whether it is fully charged Check to see whether R1343 is well There charging welded.

  • Page 19: Keyboard And Keyboard Backlight

    Repair Manual of Lenovo A516 Mobile Phone 3.5 Keyboard and keyboard backlight 3.5.1 Abnormal operation of side keys Abnormal side key Check whether there are conditions like cold solder joint and short circuit on keyboard FPC ? Whether it is ok after re-welding?

  • Page 20: Abnormal Operation Of Ctp Keyboard

    Repair Manual of Lenovo A516 Mobile Phone 3.5.2 Abnormal operation of CTP keyboard CTP keyboard is invalid CTP damaged, Whether the CTP test is normal? replace it CTP fault Replace one CTP to see whether Replace CTP it is the problem of touch screen...

  • Page 21: Calling

    Repair Manual of Lenovo A516 Mobile Phone 3.6 Calling 3.6.1 No voice heard from the other side during the call No voice heard from the other side during the call Cold solder joint Use earphone and hands-free to verify of main chip or...

  • Page 22: No Voice Heard From Your Side During The Call

    Repair Manual of Lenovo A516 Mobile Phone 3.6.2 No voice heard from your side during the call No voice heard from your side during the call Check whether MIC and the peripheral devices are well welded; whether it is ok after re-welding?

  • Page 23: Power-On Failure

    Repair Manual of Lenovo A516 Mobile Phone 3.7 Power-on failure Failed to Power-on Check whether the power key FPC is Re-weld assembled well , reassembling the power FPC ? Power on the phone on separate main The main board is damaged;...

  • Page 24: Touch Screen Failure

    Repair Manual of Lenovo A516 Mobile Phone 3.8 Touch screen failure Touch screen does not work Check whether the touch screen FPC is Re-insert assembled in place? ＯＫ Replace touch screen Check whether J1603 touch screen connector is well welded and whether the J1603 peripheral...

  • Page 25: Lcd On When Close To The Ear During The Call ; Lcd Off When Away From The Ear

    Repair Manual of Lenovo A516 Mobile Phone 3.9 LCD on when close to the ear during the call; LCD off when away from the ear. Abnormal display of LCD during the call. p-sensorFPC Check whether P-Sensor related circuit is Problem...

  • Page 26: Software Download Failure

    Repair Manual of Lenovo A516 Mobile Phone 4.1 Software Download Failure ⚫ Faults: Software can’t be normally downloaded. ⚫ Reason: Baseband chip is oppositely pasted or is in cold solder joint; CRYSTAL is oppositely pasted (no clock signal) or is in cold solder joint.

  • Page 27: Production Calibration

    Repair Manual of Lenovo A516 Mobile Phone 4.2 Production calibration 4.2.1 AFC calibration ⚫ Fault: AFC calibration Fail. ⚫ Reason: RF test cable is not connected well during calibration; TCXO is oppositely pasted or in cold solder joint. ⚫ Shooting:...

  • Page 28: Agc

    Repair Manual of Lenovo A516 Mobile Phone 4.2.2 AGC ⚫ Fault: AGC calibration Fail. ⚫ Reason: RF test cable is not connected well during calibration; the devices in receiving cable are in cold solder joint (such as RF connectors, antenna switch, saw the filter and the surrounding capacitance).

  • Page 29: Apc

    Repair Manual of Lenovo A516 Mobile Phone 4.2.3 APC Fault 1 ⚫ Fault: APC calibration Fail. ⚫ Cause: RF test cable is not connected well during calibration; PA is oppositely pasted; PA and peripheral circuit are in cold solder joint; The patch of RF input circuit of PA is deviated with short-circuit shield box.
  • Page 30 Repair Manual of Lenovo A516 Mobile Phone Fault 2: ⚫ Fault: The output power of the mobile phone is too high. ⚫ Cause: The cable isn't well connected in calibration. ⚫ Shooting: Calibration power is too high Check RF cable and fixtures to...

  • Page 31: Fault In Complete Set Test/ Rework

    Repair Manual of Lenovo A516 Mobile Phone 4.3 Fault in complete set test/ rework 4.3.1 Switch spectrum & PVT template with excessive standard ⚫ Fault: The switch spectrum and PVT template of GSM and DCS frequency bands are excessive. ⚫...

  • Page 32: High Frequency Error

    Repair Manual of Lenovo A516 Mobile Phone 4.3.2 High Frequency Error ⚫ Fault: Frequency Error exceeds standard in complete set test. ⚫ Cause: There is problem in VAFC input circuit of TCXO. ⚫ Shooting: Excessive Frequency Error Recalibrate Check whether U2104...

  • Page 33: Power Output Problems

    Repair Manual of Lenovo A516 Mobile Phone Excessive Phase Error Check the power supply part of PA （U2102） and transceiver （U2101） cold Replace the elements in solder joint 4.3.4 Power output problems ⚫ Fault: Normally power-on and receive, but when outputting two frequency bands or single frequency band power, there is no input power or the input power is very low.

  • Page 34: Wcdma Forecast

    Repair Manual of Lenovo A516 Mobile Phone If it is possible to repair the complete set, the output power of each module on transmission channel can be detected through spectrum analyzer probes when keeping the phone in the constant state of maximum power. Under normal circumstances, A.
  • Page 35 Repair Manual of Lenovo A516 Mobile Phone Repair manner: Check whether RF cable and fixtures are Reconnect and well connected? calibration Whether Rf connector CON2101，Tx module Re-weld U2101 and the surrounding circuit devices are in cold solder joint？ Whether WCDMA...

  • Page 36: Wcdma Comprehensive Test

    Repair Manual of Lenovo A516 Mobile Phone 4.5 WCDMA comprehensive test 4.5.1 ACLR or SEM Fault: ACLR or SEM Cause: No calibration or WCDMA PA（U2202,U2203） is in cold solder joint; RF transceiver (U2105) doesn’t work well. Repair manner: ACLR or SEM...
  • Page 37 Repair Manual of Lenovo A516 Mobile Phone 5.Structure assembly a) 5.1 Assembly process sequence of Lenovo A516 main body Figure 5-2 Exploded View of LENOVO A516 Main body Part Assembly As the explode drawing 5-2 2) Assemble Shielding(10) Main PCB(17) ;Assemble...
  • Page 38 Repair Manual of Lenovo A516 Mobile Phone 4) Assemble Three LCD conductive adhesive(8/30) and LCD Thermal conductivity of graphite and LCD(3) to the Front Housing Assembly(5). Watch out the Location of the Position Line; 5) Assemble The LCD buffer foam (2) to the TP component(1) by the jig paste ;...
  • Page 39 19) Assemble Battery Cell(40) to the assembly; 20) Assemble Battery Cover(28) to the assembly, Open the phone. That is the process of A516 mobile assembly 5.2 Precautions in Lenovo A516 main body assembly 1) Fastening the Screws needs appropriate strength, after fastening must check up that the up and down cover is locked in place, and without looseness;...
  • Page 40 5) When Assembling Cable, it must make sure that the Cable is very tidy, lest Cable offsets and interfere with shell. 5.3 Precautions in disassembly of Lenovo A516 main body for repairing 1）Disassemble the board connector of LCD, CTP and FPC before disassembling main board;...

Table of Contents