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Blu STUDIO 5.0 II Service Manual
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Blu STUDIO 5.0 II Service Manual

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Customer Service
Service Manual
BLU STUDIO 5.0 II
SERVICE MANUAL
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Summary of Contents for Blu STUDIO 5.0 II

  • Page 1 Customer Service Service Manual BLU STUDIO 5.0 II SERVICE MANUAL 1 / 44...
  • Page 2 Customer Service Service Manual CAUTIONS Please refer to the phone’s user’s guide for instructions relating to operation, care, and maintenance, which include important safety information. 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. Use only approved components as specified in the parts list.
  • Page 3 Customer Service Service Manual CHAPTER 1 INTRODUCTION Studio5.0II Main Function Full Touch Smartphone Android 4.2 CPU MT 6572W (1.3GHZ, dual-core) 5.0 " FWVGA IPS LCD Camera： 5.0MP camera AF , sub: 0.3MP FF(PIP) BT 4.0 , WIFI :802.11b, 802.11g, 802.11n FM ,GPS, SENSOR, PIP Flash Memory: 4GB+512MB Dual SIM...
  • Page 4 Customer Service Service Manual CHAPTER 2 SERVICE TOOLS Iron Hot air gun Voltage regulator Multimeter Solder wire, soldering paste Tweezers Driver upDownlo Wrist groun ding Pick Antistatic Computer and software download cable Metal tweezers, Screw driver etc 4 / 44...
  • Page 5 Customer Service Service Manual CHAPTER 3 DISASSEMBLY AND ASSEMBLY DISASSEMBLY Remove the Middle cover…………….…………..…2 Remove the Battery cover…….……..………………... 1 Remove the Power key Plastic……….……………..……..3 Remove the RF coaxial Line…………….…………………4 Remove the LCD FPC………………..………....………..5 Remove the Main camera………...………………….……... 6 5 / 44...
  • Page 6 Customer Service Service Manual Remove the screw……………..………………………..……7 Remove the PCBA………………..………………..……..8 Remove the induction gum cover……………..…………….9 Remove the speaker PCBA……….………………………10 Remove the TP……………………………………….………..12 Remove the TP by sucker…………………..…….……...…11 6 / 44...
  • Page 7 Customer Service Service Manual Remove the LCD by tweezers………………………….…….13 Stick TP and LCD protection film…………….…………14 Remove the LCD……………………………………….………….15 Finished。 。 。 。 。 。 。 7 / 44...
  • Page 8 Customer Service Service Manual ASSEMBLY Tear off protection film………………………………….2 Install the LCD..……………………..…..……….…..…1 PCBA Install the TP…………………..………………..……3 Install the ……………..……………….………..4 Install the RF coaxial Line……..…………………………..6 Install the speaker PCBA…………..……….………...5 8 / 44...
  • Page 9 Customer Service Service Manual Install the LCD FPC...……………..…………………………..…7 Install the 1 screws..…………………………..…….……………8 Install the Main camera………………... …………………... 9 Install the RF Line…….…………………………...……………10 Install the back cover ……………………….……………...…12 Install t he power key…………...……………………………11 9 / 44...
  • Page 10 Customer Service Service Manual Install the Battery cover.………………………………………14 Finished……… 10 / 44...
  • Page 11 Customer Service Service Manual CHAPTER 4 SYSTEM BLOCK DIAGRAM 5.1 PCBA A-Side J1003 Earphone connector. J1203 I/O Connector bug by damaged. bug by damaged No charge in, Earphone no sound Cannot upgrade Software U701 BT/WIFI/FM/GPS U101 CPU Bug by damaged IC.
  • Page 12 Customer Service Service Manual PCBA B-Side J903 FPC connector J901 Camera connector Bug by damaged. Bug by damaged. Front camera not work. Can’t take photos. U1102 Geomagnetic sensor Bug by damaged. Sensor failure J802 TP Connector Bug by damaged. TP not work. U901 LED driver IC Bug by damaged.
  • Page 13 Customer Service Service Manual Side A layout Side B layout 13 / 44...
  • Page 14 Customer Service Service Manual CHAPTER 5 UNIT CIRCUIT PRINCIPLE INTRODUCTION MT6572 INTRODUCTION 7.1 System Overview MT6572 is a highly integrated baseband platform incorporating both modem and application processing subsystems to enable 3G smart phone applications, with integrated Bluetooth, WILAN ○ and GPS modules.
  • Page 15 Customer Service Service Manual 5.1.1 Introduction for baseband chip CPU part circuit Base station interface RF TX Control Camera Control RF RX Control Control Control WIFI BT Control Control T-Flash Control Control 15 / 44...
  • Page 16 Customer Service Service Manual 5.1.2 Baseband CPU circuit introduction for Modem 16 / 44...
  • Page 17 Customer Service Service Manual 5.2.3 System Overview MT6323 is a power management system chip optimized for 2G/3G handsets and smart phones, especially based on the MdeiaTek Mt6572 system solution. MT6323 contains 3 buck converters and 24 LDOs, which are optimized for specific 2G/3G/smart phone subsystems.
  • Page 18 Customer Service Service Manual 5.2.4. PM IC MT6323 CHARGER VBAT INPUT ALDO OUTPUT DLDO OUTPUT CONTROL SIGNAL AUDIO SIM CONTROL 18 / 44...
  • Page 19 Customer Service Service Manual 5.1.5 System Overview The MT6166 is a RF transceiver targeted at high speed 2G/3G-FDD/TDD multi-mode smart phone and tablet computers implanted in 40nm CMOS. The RF transceiver function is fully integrated. This document briefly introduces the RF macros in MT6166. 19 / 44...
  • Page 20 Customer Service Service Manual 5.1.6 RF -MT6166 Power supply Signal in Crystal 26MHz 5.1.7 I/O connector (5PIN) Power supply Data Transition Data Input 20 / 44...
  • Page 21 Customer Service Service Manual 5.1.8 Four in one chip MT6627 MT6627 is a 4-in-1 connectivity chip which contains a WIFI/Bluetooth Transceiver, a GPS receiver, and a FM receiver front-ends, along with integrated passive device(IPD) in a QFN40 package. Simplified block diagram and how MT6627 connects to a companion modem is shown in Figure 1.
  • Page 22 Customer Service Service Manual 5.1.9 Four in one MT6627 22 / 44...
  • Page 23 Customer Service Service Manual 5.1.10 System Overview The SKY775XX is a dual-band transmit and receive front-end module(FEM) with lntegrated power Amplifier control(iPAC) for cellular handsets comprising GSM900 and DCS1800 operation. The FEM has capability in applications of U S and euro dual-band platforms.Designed in a low profile, compact form factor, the SKY775XX offers a complete Transmit VCO-to-Antenna and Antenna-to-receive SAW filter solution.
  • Page 24 Customer Service Service Manual 5.1.11 power amplifier frequency Start Power input antennal RF DC SKY775XX Signal AC 5.1.12SIM circuit SIM 1Clock SIM 1 power SIM 1 Data SIM 1 reset SIM 2 Clock, reset SIM 2 power SIM 2 Data 24 / 44...

  • Page 25: Chapter 6 Troubleshooting

    Customer Service Service Manual CHAPTER 6 TROUBLESHOOTING CANNOT POWER ON-CURRENT SWING INSTABILITY Cannot power on Upgrade the software Check the power manage supply output： Replace or VCCRE 1.8V Check and reweld VDD 2.8V replace the I/O power AVDD 2.8V connector manage IC VTCXO 2.8V VMEM 2.8V...
  • Page 26 Customer Service Service Manual CANNOT POWER ON-LARGE CURRENT Make the phone connect the power supply and then press power key find large current make the phone heat Check if the phone leakage (current 0mA is normal) Use the touch method to check and replace the heat spare parts Check and...
  • Page 27 Customer Service Service Manual REPAIR FLOW FOR PHONE DEAD Phone dead Upgrade the software can settle the defect issue? Check battery connector and battery touch point if is dropped or dirty? Clean or replace the battery or battery connector. Check the keypad if stuck or touch panel do not work to make the phone “dead”? Check and reinstall...
  • Page 28 Customer Service Service Manual NO DISPLAY OR DISPLAY ABNORMALITY No display or display abnormality after power on Check LCD if damage or liquid flow out Change LCD Check LCD connector is OK or not Clean or reweld the LCD connector Change LCD connector can settle the defect issue?
  • Page 29 Customer Service Service Manual INSERT SIM REPAIR PROCESS Insert SIM Check if all the SIM pins are clean Clean or replace SIM connector. Check SIM connector is OK or not Clean or reweld the SIM connector Check FPC on SIM connector is OK or not Replace FPC Replace SIM card...
  • Page 30 Customer Service Service Manual N0/WEAK SIGNAL TROUBLE SHOOING No or weak signal Inspect the antenna and antenna connector to see if there’s any distortion Replace the defective components. Check and replace RF coaxial line to see if there’s any signal . Replace RF coaxial line Put a false antenna at RF PA...
  • Page 31 Customer Service Service Manual NO/LOW SOUND FROM SPEAKER No sound or noise Remove the speaker and measure with multimeter to see if there’s any sound. The phone is in Silent mode. Replace speaker. Set the phone as normal mode Check and replace FPC is ok or not.
  • Page 32 Customer Service Service Manual RECEIVER LOW VOICE OR NO VOICE Receiver is low. Check if the receiver is broken or damaged Replace the receiver . Check if receiver connector is Resolder or clean the receiver connector. Measure the signal with oscillograph under calling mode Resolder or replace power IC is ok or not.
  • Page 33 Customer Service Service Manual NO/LOW SOUND FROM MIC No/Low sound from Check if there’s MIC cover Install the MIC cover. Press power on and side button to test mode and activate echo loop, measure MIC voltage is 1.5V、0.7V Replace the MIC Replace FPC to check if the problem is solved Replace the...
  • Page 34 Customer Service Service Manual DOES NOT CHARGE – NO CHARGE IN No charge Change battery Check charger and cable without problem, or change good one Upgrade the Check if I/O connector works normal Re-solder or replace the I/O connector Check and replace FPC is ok or not? Replace the FPC Replace the charge IC...
  • Page 35 Customer Service Service Manual CAN’T READ T-FLASH CARD Can’t read T-Flash card Check if T-Flash slot appearance was ok? Replaced the T-Flash slot Measure if T-Flash slot pin 4 VMC was 2.8V. Re-solder or replace Power IC Check if the voltage of T-Flash pin3/pin5/pin7 to the ground was around 0.7V with multimeter diode column...
  • Page 36 Customer Service Service Manual WIFI、BT、FM 、GPS DEFECT REPAIR FLOW CHART WIFI can’t open， Can’t work normal Software update and check the function is OK or not Software update Check 4 in 1 IC L12 pin have 3.7V +B supply voltage or not Check C701 have VBATT V supply voltage or not Replace U701...
  • Page 37 Customer Service Service Manual Chapter 7 Firmware Upgrading Guide Firmware Upgrading 1. Install USB driver The maximum downloading speed can be up to 921600bit/s when using USB-Serial cable. The driver needs to be installed before using the USB cable. 1> computer eject hardware installation instruction and choose following item and then click’’next step’’ Choose next step 2>...
  • Page 38 Customer Service Service Manual 3> USB driver is installing. 4> click’’ finished’’ as below. Click here 38 / 44...
  • Page 39 Customer Service Service Manual 2>. Software upgrade 1> Open software upgrading platform’’ SP_Flash_Tool_v3.1304.0.119 2> Choose ’’USB mode’’ 3>choose’’ speed’’===>’’Do Not Switch speed’’ 39 / 44...
  • Page 40 Customer Service Service Manual 4>choose’’Scatter-loading File’’ Choose Scatter loading 5>Click ‘Scatter-loading’’ to choose file’’MT6577_Android_scatter.emmc.txt’’ Choose this 40 / 44...
  • Page 41 Customer Service Service Manual 6> the software is upgrading. Choose Download 7> Finished. 41 / 44...
  • Page 42 Customer Service Service Manual 8>: Description: can’t power on (also upgrade software fail) Root cause: red scroll 100% run completely when upgrade software, the detail as figure 1, also it prove power supply, clock is normal and defective typical issue is focus on CPU or FLASH poor soldering or damage, and maybe software do not fit for hardware.
  • Page 43 Customer Service Service Manual CHAPTER 8 TEST 43 / 44...
  • Page 44 Customer Service Service Manual 44 / 44...