Lenovo A328 Service Manual
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Lenovo A328 Service Manual

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LENOVO
A328 SERVICE MANUAL
V1.0
1
Table of Contents
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Summary of Contents for Lenovo A328

  • Page 1 LENOVO A328 SERVICE MANUAL V1.0...
  • Page 2 LENOVO Documents statement: This document is intended for use by qualified service personnel only. The documents only are used for service reference.

  • Page 3: Table Of Contents

    LENOVO TABLE OF CONTENT Section page 1. Product Figures ................5 1-1. Exploded view ..............5 1-2. Product Main Function ............7 1-3. General Specification ............7 2. Block Diagrams ................8 2-1. System Diagrams .............. 8 2-1-1 BBIC Diagrams ............8 2-2.
  • Page 4 LENOVO 3.2 RF..................38 3-2-1.GSM/DCS RX troubleshooting ....... 38 3-2-2.DCS/GSM TX Part ..........39 4. Main Element Specifications ............ 39 4-1 Baseband part ..............39 4-1-1.BBIC(U108) ............39 4-1-2. Power Management Control(U501) ....... 49 4-1-3. WIFI/GPS/FM/BT IC(U1102) ......... 52 4-1-4. Charge IC(U502) ........... 55 4-1-5.

  • Page 5: Product Figures

    LENOVO 1. Product Figures 1-1. Exploded view X1101 X101 26M Crystals Damage caused by failure：： U501 Power Management Can not boot;WIFI、 GPS、 BT、 Damage caused by failure： FM test fail large currents;does not boot; U106 RF-TR U108 BBIC Damage caused by failure：...
  • Page 6 LENOVO J802 USB Connector J801 Headphone Jack Damage caused by failure: Doesn’t charge,data transmit Damage caused by failure： Headphones silent; not receive FM J1003 Front camera Damage caused by failure： J601 Back camera Cannot take photo Damage caused by failure：...

  • Page 7: Product Main Function

    LENOVO 1-2. Product Main Function Support Camera Music player Support T-Flash card Support WIFI 4.0" WVGA LCD Support GSM850&GSM900&DCS1800&PCS1900&WCDMA900&WCDMA210 Network Support Bluetooth Support FM radio Support dual SIM card Support G-sensor Support GPS 1-3. General Specificatio PCS1900 1850～1910 1930～1990 512~810 80 MHz 270.833 kbps...

  • Page 8: Block Diagrams

    LENOVO 2. Block Diagrams 2-1. System Diagrams RF-TR Charger 5V IN RF-PA Battery SIM 1/SIM Audio_PA Speak USB DM/DP T-FLASH URAT TX/RX Camera Bluetoot 3.5MM WIFI IC Earphoen Receiver FM Radio ROM+RAM Side Health WVGA LCD TX PA Remark：FM/GPS/WIFI/BT to Four in Chip;...

  • Page 9: Power Management Diagrams

    LENOVO GPU models for SGX still 544. Typical application diagram is shown in nether figure Application Diagram of MT6582 2-2. Power Management Diagrams...
  • Page 10 LENOVO...

  • Page 11: Flow Chart Of Troubleshooting

    LENOVO 3. Flow Chart of Troubleshooting 3-1.Baseband 3-1-1. Phone does not start up troubleshooting Power-on Sequence and Protection Logic: The PMU handles the powering ON and OFF of the handset. There are three ways to power-on the handset system : ①...
  • Page 12 LENOVO Troubleshooting flow chart Main related component: BBIC(U108)，NAND+SDRAM(U401), XTAL CRYSTAL（X101),RF-TR(U201), PMIC（U501）,Power button. Power ON/OFF and download circuit From BBIC POWER KEY MINI USB CIRCUIT...
  • Page 13 LENOVO Download troubleshooting Main related component: BBIC(U108)，NAND+SDRAM(U401),RF-TR(U106), XTAL CRYSTAL（X101）, MINI USB(J802). Download fault Check circuit component UART connection fault visually .soldered again or replace damaged component Press phones power key Soldered again or replace Observe the current BBIC Current is large ≤20MA...

  • Page 14: Sim Troubleshooting

    LENOVO 3-1-2. SIM troubleshooting Troubleshooting flow chart Main related component: BBIC(U108), SIM connector(J601,J602) SIM fault Clean SIM connector Check work Select correct mode mode correct OK? SIM1&SIM2 all fault SIM1&SIM2 all fault Check connector Check connector Soldered again or solder joint and spring...

  • Page 15: Mic Troubleshooting

    LENOVO SIM CIRCUIT SIM1&SIM2 From BBIC From BBIC From BBIC From BBIC 3-1-3. MIC troubleshooting Troubleshooting flow chart Main related component: BBIC(U108),MIC...
  • Page 16 LENOVO Microphone does not work Check MIC circuit Soldered again or replace component visually damaged component OK? Check microphone Soldered again or replace damaged component OK? Is the bias Voltage 2.4V Check BBIC Soldered again or measured from MICP replace...
  • Page 17 LENOVO MIC circuit FromPMIC From MIC To BBIC...

  • Page 18: T-Flash Troubleshooting

    LENOVO 3-1-4. T-Flash troubleshooting Troubleshooting flow chart Main related component: BBIC(U108)，T-FLASH CONNECTOR(J603). Phone does not read T-Flash Check T-Flash card Replace T-Flash Check T-flash connector Solder again or replace solder joints and spring IS T-Flash working NOW contacts is OK...

  • Page 19: Speaker Troubleshooting

    LENOVO T-Flash circuit To BBIC Voltage From U502 3-1-5. Speaker troubleshooting Speaker circuit From BBIC To speaker Troubleshooting flow chart Main related component: BBIC(U108),SPEAKER...
  • Page 20 LENOVO Speaker does not work Check Speaker Replace Speaker Check Audio circuit Solder again or replace component visually The damaged component OK? Measure Audio PA work voltage(VBAT) Check PA VBAT circuit Normal:3.6-4.2V Check BBIC Soldered Measure Audio PA enable again or replace signal(AUDIO-EN)Normal:2.8V...

  • Page 21: Receiver Troubleshooting

    LENOVO 3-1-6. Receiver troubleshooting Troubleshooting flow chart Main related component: BBIC(U108),Receiver Earpiece does not work Check Earpiece circuit Soldered again or replace component visually damaged component OK? Check earpiece Soldered again or replace IS earpiece working now? Check BBIC Soldered again or...

  • Page 22: Vibra Troubleshooting

    LENOVO Receiver circuit From BBIC To receiver 3-1-7. Vibra troubleshooting Troubleshooting flow chart Main related component: BBIC,MOTOR，KB board ConnectorJ1201 Vibra circuit From PMIC To VIB...
  • Page 23 LENOVO Vibra Fault Replace Motor Check Moto OK? Soldered again or replace Check Moto circuit damaged component OK? component visually Measure Motor working Check BBIC Soldered again or Voltage:VBAT mormal replace :3.6-4.2V Check KB Connector Soldered again or replace soldered ok？...

  • Page 24: Camera Troubleshooting

    LENOVO 3-1-8. Camera troubleshooting Troubleshooting flow chart Main related component: BBIC(U108)，NOR+UTRAM（U401），CAMERA MODULE. camera module Fix camera properly Camera does not work properly fixed IS camera working now? Check camera module OK? Replace damaged component Soldered again or replace Check camera connector solder...
  • Page 25 LENOVO Camera circuit Front Camera circuit From BBIC...

  • Page 26: Fm Radio Troubleshooting

    LENOVO 3-1-9. FM radio troubleshooting Troubleshooting flow chart Main related component: BBIC(U108)，earphone jack(J801),FM radio(J1102) Check FM radio circuit Soldered again or replace FM radio does not work component Ok damaged component ok? Check FM antenna and Replace damaged component earphone OK?
  • Page 27 LENOVO FM Circuit From earphone HEADGND ANT IN...

  • Page 28: Display Troubleshooting

    LENOVO 3-1-10. Display troubleshooting Troubleshooting flow chart Main related component: BBIC(U108),EMI(F701-F702),LCD. display Check circuit Soldered again or replace doesnot work component Ok damaged component ok? Soldered again or replace Check soldered LCD ,IS FM working now? status of LCD Backlight fault...
  • Page 29 LENOVO Display Circuit LCD Connector circuit From BBIC Backlight signal From LED driver LCD backlight circuit To LCD PAD Backlight EN From BBIC...

  • Page 30: Bluetooth Wifi Gps Troubleshooting

    LENOVO 3-1-11. Bluetooth WIFI GPS troubleshooting Troubleshooting flow chart Main related component: BBIC(U108) ,BT/WIFI/GPS MODEM（J1102），The Clock signal provided by the CPU; BT/WIFI/GPS/FM check BBIC or Check CLK signal All the function are not Crystal oscillator is ok Work? Soldered again...
  • Page 31 LENOVO RF-filter(WIFI/BT/GPS) TO U1102 BT/WIFI/GPS ANT...
  • Page 32 LENOVO 3-1-12. Side health Troubleshooting Keyboard circuit From BBIC Troubleshooting flow chart Main related component: BBIC(U108) and keypad FPC...
  • Page 33 LENOVO Check keypad Cleaning keypad Keyboard failure normal visually Replace dome sheet Check keypad dome keypad working now? sheet visually One or more row/column is not whole row/column is not working? working? Soldered again or Check keypad FPC Check keypad FPC...

  • Page 34: Charge Troubleshooting

    LENOVO 3-1-13. Charge troubleshooting Troubleshooting flow chart Main related component: BBIC(U108), USB(J802)，MOSFET（U502）. does not charge Check whether the Soldered again or replace normal charger damaged component OK? Soldered again or replace Check charger IC is charger IC working properly Soldered again or replace...
  • Page 35 LENOVO Battery charge circuit...

  • Page 36: 3-2-1.Gsm/Dcs Rx Troubleshooting

    LENOVO 3.2 RF 3-2-1.GSM/DCS RX troubleshooting Troubleshooting flow chart BBIC(U108) XTAL CRYSTAL Main related component: （X101),RF-TR(U201),RF-PA（U101），RX FILTER（U103） Soldered again or GSM/DCS/PCS RX does not Check RX replace circuit Check inside place antenna is one feed and one Trim or replace antenna...
  • Page 37 LENOVO 3-2-2.GSM/DCS TX Part Troubleshooting flow chart BBIC(U108) ， XTAL CRYSTAL Main related component: （X101),RF-TR(U106),RF-PA（U102） Soldered again or GSM/DCS/PCS TX does not work Check TX circuit replace component visually Check antenna matching Trim or replace antenna component Soldered again or replace...
  • Page 38 LENOVO DCS1800 TX GSM900 TX TX signal From RF- transceiver transceiver circuit GSM900 TX DCS1800 TX RX signal From RF-Switch...

  • Page 39: Main Element Specifications

    LENOVO 4. Main Element Specifications 4-1 Baseband part 4-1-1.BBIC(U108) System Overview...
  • Page 40 LENOVO...
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  • Page 46 LENOVO Pin Outs...

  • Page 47: Power Management Control(U501)

    LENOVO Power Management Control(U501) 4-1-2...
  • Page 48 LENOVO...
  • Page 49 LENOVO...
  • Page 50 LENOVO 4-1-3. MT6627 IC(U1102) Features...
  • Page 51 LENOVO MT6627 Block diagram...

  • Page 52: Charge Ic(U502)

    LENOVO 4-1-4. Charge IC(U502)
  • Page 53 LENOVO...

  • Page 54: Nand+Sdram(U401)

    LENOVO 4-1-5. NAND+SDRAM(U401)
  • Page 55 LENOVO...
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  • Page 58: Rf Part

    LENOVO 4-2. RF part 4-2-1 RF PA(U101) Features 3.2 to 4.2V low voltage bias power supply Support for WCDMA/HSDPA/HSUPA The linear output power to 28 DBM 45% efficient (28 DBM) Provide three gain modes For using DC/DC power supply and optimization...

  • Page 59: Rf Transceiver (U201)

    LENOVO 4-2-2. RF TRANSCEIVER (U201) Introduction Overview Key features Block Diagram and Application Diagram...
  • Page 60 LENOVO...
  • Page 61 LENOVO Ball assignment...
  • Page 62 LENOVO RF I/O list...
  • Page 63 LENOVO...
  • Page 64 LENOVO Operating Conditions...
  • Page 65 LENOVO...

  • Page 66: Test Instructions

    LENOVO 5. Test Instructions Press the volume down button and power button to enter the engineering test mode, select "full test" into automatic test pattern: 1. ALS/PS test; 17. Battery & Charge test; 2. Touch Panel test; 18. Version test;...

  • Page 67: Glossary

    LENOVO 6. Glossary...
  • Page 68 LENOVO...

  • Page 69: Warnings And Cautions

    LENOVO 7. Warnings and cautions Warnings If the device can be installed in a vehicle, Care must be taken on installation in vehicles fitted with. Electronic engine management systems and anti-skid braking systems. Under certain fault conditions, Emitted rf energy can affect their operation. If necessary, Consult the vehicle dealer/manufacturer to determine the immunity of vehicle electronic systems to RF energy.
  • Page 70 LENOVO subject to interference. Before making any test connections, Make sure you have switched off all equipment. Cautions Servicing and alignment must be undertaken by qualified personnel only. Ensure all work is carried out at an anti-static workstation and that an anti-static wrist strap is worn.
  • Page 71 LENOVO during shipping and handling outside any ESD Protected Area (EPA). Every repair action involving opening the product or handling the product components must be done under ESD protection. ESD protected spare part packages MUST NOT be opened/closed out of...

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