Blu Grand X LTE Service Manual
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Blu Grand X LTE Service Manual

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BLU Model: Grand X LTE
GRAND X LTE
SERVICE MANUAL

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Summary of Contents for Blu Grand X LTE

  • Page 1 BLU Model: Grand X LTE GRAND X LTE SERVICE MANUAL...
  • Page 2 BLU Model: Grand X LTE Disassembly 1. Take out SIM card tray, unscrew 2 bottom screws. 2 Take apart the front and back cover.
  • Page 3 BLU Model: Grand X LTE 3. Take out battery. 4. Take out PCBA and sub-‐board screws. 5. Open volume key FPC, TP, and open coaxial cable connector.
  • Page 4 BLU Model: Grand X LTE 6. Turn PCBA, open FPC connector, LCD-‐FPC connector. 7. Take out PCBA...
  • Page 5 BLU Model: Grand X LTE 8. Take front and rear camera out of PCBA 9. Take out motor, open coaxial cable connector, take out the module. 10. Take apart Power key FPC, Volume Key FPC, receiver, light sensor cover...
  • Page 6 BLU Model: Grand X LTE 11. Heat and take apart TP 12. Take out LCD...
  • Page 7 BLU Model: Grand X LTE Assembly 1. Put LCD into front housing module 2. Stick TP to LCD+ front housing module...
  • Page 8 BLU Model: Grand X LTE 3. Install receiver, power key FPC, volume key FPC, light sensor cover 4. Install front and rear camera to the PCBA 5. Install main FPC, LCD-FPC...
  • Page 9 BLU Model: Grand X LTE 6. Install PCBA, put in screws 7. Install volume FPC, install TP connector, and coaxial cable connector 8. Install MIC and Motor...
  • Page 10 BLU Model: Grand X LTE 9. Install sub-board to housing, install main FPC, motor and coaxial cable. 10. Put on sub-board screws 11. Put in battery...
  • Page 11 BLU Model: Grand X LTE 12. Put on battery cover 13. Put in bottom screws, and SIM card tray...

  • Page 12: Exploded View And Component Disposal

    Chapter 1 EXPLODED VIEW AND COMPONENT DISPOSAL EXPLODED...

  • Page 13: Disassembly And Assembly

    DISASSEMBLY AND ASSEMBLY SERVICE TOOLS...
  • Page 14 Solder wire, soldering paste Wrist grounding strap, Antistatic gloves Metal tweezers, Screw driver, SRT-6 Plates...

  • Page 15: System Block Diagram

    Chapter 2 SYSTEM BLOCK DIAGRAM...

  • Page 16: Instruction Of The Unit Circuit

    Chapter 3 INSTRUCTION OF THE UNIT CIRCUIT Circuit instruction of CPU...
  • Page 23 CPU—input of the keypad...
  • Page 24 The joint circuit of SIM1&SIM2&T-FLASH...
  • Page 25 EMMC-MCP...
  • Page 26 Bluetooth/WIFI/GPS/FM...
  • Page 27 MT6328 CPU power supply port...
  • Page 28 Battery connector...
  • Page 29 Charger Circuit...
  • Page 30 I/O connector RF PA...

  • Page 36: Lcd Interface

    LCD INTERFACE LCD BACKLIGHT...

  • Page 37: Camera Interface

    CAMERA INTERFACE...
  • Page 39 Flash LED...
  • Page 42 Chapter4 PCB Layout chart PCB layout SIDE A...
  • Page 43 PCB layout SIDE B...

  • Page 45: Troubleshooting

    Chapter5 Test flow chart of test SIM card TROUBLE SHOOTING...
  • Page 46 Test flowchart of can not power on (main)
  • Page 47 The test flowchart of head phone...
  • Page 48 Test flowchart of no display or display abnormally.
  • Page 49 The test flowchart of download failed...

  • Page 50: Function Test

    FUNCTION TEST Press “*#37*#” to check these items in stand by mode: Version: to check the version of the software Echo Loop: blow to the mic, the receiver will have a sound Key: press relevant keys appear in the screen Libration: The cellphone will librate Lond SPK: there will be a sound from the speaker Ring: press start there will be some music from the speaker...

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