Blu Grand X LTE Service Manual
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BLU Model: Grand X LTE
GRAND X LTE
SERVICE MANUAL

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  • Page 1 All manuals and user guides at all-guides.com BLU Model: Grand X LTE GRAND X LTE SERVICE MANUAL...
  • Page 2 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com BLU Model: Grand X LTE 6. Turn PCBA, open FPC connector, LCD-‐FPC connector. 7. Take out PCBA...
  • Page 5 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com BLU Model: Grand X LTE 11. Heat and take apart TP 12. Take out LCD...
  • Page 7 All manuals and user guides at all-guides.com BLU Model: Grand X LTE Assembly 1. Put LCD into front housing module 2. Stick TP to LCD+ front housing module...
  • Page 8 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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

    All manuals and user guides at all-guides.com Chapter 1 EXPLODED VIEW AND COMPONENT DISPOSAL EXPLODED...
  • Page 13: Disassembly And Assembly

    All manuals and user guides at all-guides.com DISASSEMBLY AND ASSEMBLY SERVICE TOOLS...
  • Page 14 All manuals and user guides at all-guides.com Solder wire, soldering paste Wrist grounding strap, Antistatic gloves Metal tweezers, Screw driver, SRT-6 Plates...
  • Page 15: System Block Diagram

    All manuals and user guides at all-guides.com Chapter 2 SYSTEM BLOCK DIAGRAM...
  • Page 16: Instruction Of The Unit Circuit

    All manuals and user guides at all-guides.com Chapter 3 INSTRUCTION OF THE UNIT CIRCUIT Circuit instruction of CPU...
  • Page 17 All manuals and user guides at all-guides.com...
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  • Page 21 All manuals and user guides at all-guides.com...
  • Page 22 All manuals and user guides at all-guides.com...
  • Page 23 All manuals and user guides at all-guides.com CPU—input of the keypad...
  • Page 24 All manuals and user guides at all-guides.com The joint circuit of SIM1&SIM2&T-FLASH...
  • Page 25 All manuals and user guides at all-guides.com EMMC-MCP...
  • Page 26 All manuals and user guides at all-guides.com Bluetooth/WIFI/GPS/FM...
  • Page 27 All manuals and user guides at all-guides.com MT6328 CPU power supply port...
  • Page 28: Battery Connector

    All manuals and user guides at all-guides.com Battery connector...
  • Page 29: Charger Circuit

    All manuals and user guides at all-guides.com Charger Circuit...
  • Page 30 All manuals and user guides at all-guides.com I/O connector RF PA...
  • Page 31 All manuals and user guides at all-guides.com...
  • Page 32 All manuals and user guides at all-guides.com...
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  • Page 34 All manuals and user guides at all-guides.com...
  • Page 35 All manuals and user guides at all-guides.com...
  • Page 36: Lcd Interface

    All manuals and user guides at all-guides.com LCD INTERFACE LCD BACKLIGHT...
  • Page 37: Camera Interface

    All manuals and user guides at all-guides.com CAMERA INTERFACE...
  • Page 38 All manuals and user guides at all-guides.com...
  • Page 39 All manuals and user guides at all-guides.com Flash LED...
  • Page 40 All manuals and user guides at all-guides.com...
  • Page 41 All manuals and user guides at all-guides.com...
  • Page 42 All manuals and user guides at all-guides.com Chapter4 PCB Layout chart PCB layout SIDE A...
  • Page 43 All manuals and user guides at all-guides.com PCB layout SIDE B...
  • Page 44 All manuals and user guides at all-guides.com...
  • Page 45: Troubleshooting

    All manuals and user guides at all-guides.com Chapter5 Test flow chart of test SIM card TROUBLE SHOOTING...
  • Page 46 All manuals and user guides at all-guides.com Test flowchart of can not power on (main)
  • Page 47 All manuals and user guides at all-guides.com The test flowchart of head phone...
  • Page 48 All manuals and user guides at all-guides.com Test flowchart of no display or display abnormally.
  • Page 49 All manuals and user guides at all-guides.com The test flowchart of download failed...
  • Page 50: Function Test

    All manuals and user guides at all-guides.com 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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