cromax X327 Service Manual
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cromax X327 Service Manual

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Customer Service
DivaX Service Manual
Service manual
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Summary of Contents for cromax X327

  • Page 1 Customer Service DivaX Service Manual Service manual...

  • Page 2: Table Of Contents

    Customer Service DivaX Service Manual CAUTIONS 1、 Please read this service manual carefully and make sure all elements of anti-static are in place before the repair work is carried out. 2、 Servicing and alignment MUST be undertaken by qualified personnel only. 3、...

  • Page 3: Product Specification

    Customer Service DivaX Service Manual Chapter 1 Product Specification DS128 Features & Functions  Dual SIM Dual Standby Single Connection  Fashion bar phone  BT 3.0   Multi-Media application  T-Flash（Support 8G T Card）  QVGA240*320  0.3 Mega-H /1.3 Mega-S ...

  • Page 4: Exploded View

    Customer Service DivaX Service Manual Chapter 2 Exploded View 1. Main Lens film 2. Main Lens 3. Main Lens glue 4. Receiver filter 5. Front cover 6. LCD sponge 7. LCD 8.LCD gobo 9. Receiver 10. VIB glue 11.Vibrator 12. Camera glue 13.

  • Page 5: Tools

    Customer Service DivaX Service Manual Chapter 3 Tools Solder iron Hot Air Gun Power Supply Multimeter Solder wire, Flux Tweezer Screw Driver Cable Wrist grounding strap Pick Antistatic gloves PC, Download cable Others...

  • Page 6: Dissembly

    Customer Service DivaX Service Manual Chapter 4 Disassembly & Assembly 4.1 Disassemble Remove the battery cover Remove 4 screws Open back cover Remove the back cover Remove the BCBA. Stick the LCD film...
  • Page 7 Customer Service DivaX Service Manual Stick the lens film Remove the keypad Finish 4.2 Assemble Install the keypad Remove the lens film Install the back cover. Install the PCBA...
  • Page 8 Customer Service DivaX Service Manual Button the cover Fasten the 4 screws. Install the battery cover Finished.

  • Page 9: A&B Side Of Pcba

    Customer Service DivaX Service Manual Chapter 5 Picture of PCBA 5.1 Side A PCBA (Side A) Location of components J701 LCD U301 Connector Flash IC U501 26Mhz Crystal U101 CPU U502 RF PA MT6250 5.2 Side B Side B PCBA (Side B) Location of Components J201 Battery D610 发光二极...

  • Page 10: A&B Of Pcba Layout

    Customer Service DivaX Service Manual 5.3 PCBA Layout side A 5.4 PCB Layout Side B...

  • Page 11: System Block Chart

    Customer Service DivaX Service Manual Chapter 6 System Block Chart MT6250...

  • Page 12: Unit Circuit Map

    Customer Service DivaX Service Manual Chapter 7 Unit Circuit 7.1.1 System Overview MT6250 is a GSM/GPRS handset chip solution which integrates RF,analog baseband,digital baseband as well as Power Management Unit(PMU) and can greatly reduce the component count and make a smaller PCB size MT6250 including Bluetooch and FM. Besides,MT6250 is capable of Single Antenna Interference Cancellation (SAIC) and AMR speech.
  • Page 13 Customer Service DivaX Service Manual 7.1.2 Baseband & CPU MT6250 Audio circuit CAMERA Data transportation Keypad control side connector circuit BT Data transportation Data control side transportation circuit...
  • Page 14 Customer Service DivaX Service Manual 7.1.3 Baseband – Keypad 7.1.4 Clock 32.768KHZ Circuit Clock signal transportation side 32.768 khz Clock crystal MT6250...
  • Page 15 Customer Service DivaX Service Manual 7.1.5 CPU to Flash FLASH data transportation side 7.1.6 SIM data output MT6250 SIM 2 Clock SIM 2 Data SIM 1 Clock SIM 1 Data SIM 1 reset SIM 2 reset...
  • Page 16 Customer Service DivaX Service Manual 7.2 MT6250 CPU Power output item voitage current Vcore 1.2v 200ma 2.8v 100ma Vadd 2.8v 150ma Vtcxo 2.8v 20ma Vrtc 1.2v 200ma Vmem 2.8v 150ma Vsim 2.8v 20ma 2.8v 200ma 1.8v 150ma 7.3 Battery connector Positive pole Temperature...
  • Page 17 Customer Service DivaX Service Manual 7.4 I/O Interface (5 PIN) Charging input Data download 7.5.1 System Overview The SKY7756X 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 SKY77569 offers a complete Transmit VCO-to-Antenna and Antenna-to-receive SAW filter solution.
  • Page 18 Customer Service DivaX Service Manual SKY7756X 7.5.2 power amplifier frequency Start Power input antennal RF DC SKY7756X Signal AC...
  • Page 19 Customer Service DivaX Service Manual 7.6 SIM circuit SIM 1Clock SIM 1 power SIM 1 Data SIM 1 reset SIM 2 Clock, reset SIM 2 power SIM 2 Data...

  • Page 20: Trouble Shooting Guide

    Customer Service DivaX Service Manual Chapter 8 Trouble shooting guide Can’t Download Cannot download Check if it is caused by the Power on PC, cable, tools etc. Replace or re-config. Replace or Check I/O Connector re-solder the I/O connector Connect the cable, check if Disconnect the cable the current is normal (about and check if the chipset...
  • Page 21 Customer Service DivaX Service Manual Cannot power on-current swing instability Make the phone connect the power supply and find the current swing at 50-100mA Upgrade the software Check and replace the I/O connector Check the power manage supply output： VCCRE 1.8V VDD 2.8V AVDD 2.8V Replace or...
  • Page 22 Customer Service DivaX Service Manual Cannot power on-low or no current Make the phone connect the power supply and find low or no current ， Check battery Clean connector and power reweld replace it Upgrade the software Check and replace I/O Check the power manage connector supply output：...
  • Page 23 Customer Service DivaX 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 Check and touch replace RF method to...
  • Page 24 Customer Service DivaX Service Manual Repair flow for phone dead Phone dead Upgrade the software can Upgrade the settle the defect issue? Software. Check battery connector Clean or replace the battery and battery touch point if or battery connector. is dropped or dirty? Check the keypad if stuck or Check and reinstall the keypad touch panel do not work to...
  • Page 25 Customer Service DivaX Service Manual No display or display abnormality No display or display abnormality after power on Check LCD if damage or Change LCD liquid flow out Check LCD connector Clean/re-solder is OK or not connector Change LCD FPC Problem solve Check if 12 PIN of J702 have signal...
  • Page 26 Customer Service DivaX Service Manual Test process for Key can’t work Key can’t work Single key can’t All key can’t Some of key can’t work work work (e.g: 1/2/3, regular problem) Clean it Upgrade software Use multimeter to check if to check if can the voltage is 0.7V or not solve this problem...
  • Page 27 Customer Service DivaX Service Manual Key light can’t work Key light can’t work Reassemble FPC Expect bar model Use multimeter to check Check if circuit is voltage of LED is OK or not broken Upgrade software Problem solve 软件升级 Use external power (2.8V) to Change LED check LED can work or not Changed or re-solder CPU MT6250...
  • Page 28 Customer Service DivaX Service Manual Insert SIM Repair Process Insert SIM Clean or replace Check if all the SIM connector. SIM pins are clean Resolved If SIM card Replace SIM card is available CPU MT6250 Connect Power supply may be defective to check the current MT6250 may be defective...
  • Page 29 Customer Service DivaX Service Manual N0/weak signal trouble shooing No or weak signal Inspect the antenna and Replace the defective antenna connector to see components. if there’s any distortion Put a false antenna at RF PA Replace RF PA IC. IC to see if there’s any signal Make a false antenna at Saw filter is damaged,...
  • Page 30 Customer Service DivaX Service Manual No/Low sound from Speaker No sound or noise Remove the speaker and Press power on and side button to measure with multimeter to check if there’s the ring is normal see if there’s any sound. Set the phone as The phone is in Replace speaker.
  • Page 31 Customer Service DivaX Service Manual Receiver low voice or no voice Receiver is low. Set the phone as Check if LS402 handsfree mode is damaged. Resolder clean LS402 Check if the receiver Replace the is broken or damaged receiver. Test if there’s sound from Replace receiver receiver with multimeter Measure the signal...
  • Page 32 Customer Service DivaX Service Manual No/Low sound from MIC No/Low sound from MIC Check if there’s Install the MIC cover MIC cover *#84666*# and activate echo loop, measure MIC MK400 Replace MIC voltage is 1.5V、0.7V Check if inductor B411、 Replace B411 or B402 B402 is damaged.
  • Page 33 Customer Service DivaX Service Manual Does not charge – remind error charge Remind error during charge Remind: “fault connection” “battery overheat” Change battery Re-flash SW Check battery connector testing Pin, if the bias resis and vatge be normal. Check capacitor C251、resistor R214\R205 be normal Replace Check charge protective tube...
  • Page 34 Customer Service DivaX Service Manual Does not charge – no charge No charge Change battery Re-flash SW Check charger and cable without problem, or change good one Check if I/O connector works normal Connect the charger without battery put in, check if the voltage of positive pole is around 3.6V.
  • Page 35 Customer Service DivaX Service Manual Does not charge – does not recognize charging If recognize “charger connected” There is no symbol shows charging Re-solder or replace Power on and connect charger, input *#84666*# to check if connector ADC is around 0.40A Change battery Re-flash SW Connect the charger without...
  • Page 36 Customer Service DivaX Service Manual Stand-by short time Stand-by short time Change battery Re-flash SW Connect the phone with Voltage regulator, the current should be zero Power on the phone, check the if working current be By touch to Check and normal（no exceed 600mA）...
  • Page 37 Customer Service DivaX Service Manual Can’t read T-Flash card Can’t read T-Flash card Check if T-Flash Replaced the slot appearance T-Flash slot was ok? Measure if Re-solder T-Flash slot pin 4 T-flash slot VMC was 2.8V. Check if the voltage of T-Flash Measure if there is pin pin3/pin5/pin7 to the ground was around short for the T-flash...
  • Page 38 Customer Service DivaX Service Manual Can’t successfully take picture Can’t successfully take pictures. Re-install the camera and check if it can work well. Power on the PCBA and Upgrade SW to check if open the camera function, it was related to SW. Check if C606、C608 have 2.7V or 1.5V voltage Check if camera slot...
  • Page 39 Customer Service DivaX Service Manual Chapter 9 Firmware Upgrading Guide 9.1 Firmware Upgrading 9.1.1 Install USB driver The maximum downloading speed can be up to 921600bit/s when using USB-Serial cable. The driver need to be installed before using the USB cable. Please keep the USB cable unplugged when installing the driver.
  • Page 40 Customer Service DivaX Service Manual 9.1.4 Select “Options”-“Format FAT (DISABLED)…” and please do NOT select “validation”. 9.1.5 Please select “Format FAT”. Select “Format FAT”...
  • Page 41 Customer Service DivaX Service Manual 9.1.6 Select “Options”- “Backup and Restore”, then select the “Backup -> Download/format -> Restore”. 9.1.7 Click the ”Download Agent” and select the file “MTK-ALLInOne-DA.bin”. Select this one...
  • Page 42 Customer Service DivaX Service Manual 9.1.8 Click the “Scatter/config file” and select the “scatTINNO36_11A_GEMINI.txt”. Select this one 9.1.9 Power off the handset, remove the battery, click “Download”, and connect the cable with handset, then insert the battery, press the power on button, the gray, red, blue, green and gray progress bar shall appear. Then upgrade would be completed when appear “OK”.
  • Page 43 Customer Service DivaX Service Manual 9.1.10 Backup the data. (gray progress bar) 9.1.11 Connect to phone. (red progress bar)
  • Page 44 Customer Service DivaX Service Manual 9.1.12 Downloading is in process. (blue progress bar) 9.1.13 Downloading is completed. Power on phone and input “*#84666*#”, select “one key Restore”, phone will be reboot, then the user’s 9.1.14 setting could be eliminated entirely.
  • Page 45 Customer Service DivaX Service Manual 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 46 Customer Service DivaX Service Manual 9.2 IMEI Writing Guide 9.2.1 Plug the correct upgrade cable to the computer, then run IMEI writer. For the first time you run IMEI Writer in the computer, below figure would be occur, then choose “IMEI_Writer.exe”. Choose the “IMEI_Writer.exe”.
  • Page 47 Customer Service DivaX Service Manual 9.2.2 Refer to below figure to set up IMEI writer, power off the phone and then click “Restart”, after 3 seconds plug the phone cable connector to the phone and power on the phone, it starts to write IMEI. Click here to change the database file Select COM port...

  • Page 48: Cit Testing

    Customer Service DivaX Service Manual Chapter 10 CIT Testing Input “*#84666*#” in the standby mode. 1. Version: Confirm the firmware version. 2. Echo Loop: Receiver shall produce sound when blowing over the mic. 3. Keypad: Press every button on the handset until the screen is clear. 4.

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