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FLY E185 Service Manual Download Page 20

FLY E185

Service Manual

55µA. Hence, the controlled charging current could be calculated as I

CHR

=

β

x 55 µAx

CSDAC_DATA\[7:0].

8. Current Sense
A current sense circuit measures the voltage difference between VSEN and VBAT, which could be
used as a feedback signal for CSDAC driving control.

Figure 3.3.3-1 Battery Connector

CKT Confidential

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Summary of Contents for E185

Page 1: ...FLY E185 Service Manual CKT Confidential Page 1 of 47 SERVICE MANUAL FLY E185 MOBILE TERMINAL V1 0 COMPANY CONFIDENTIAL All Rights Reserved...

Page 2: ...UIT 21 3 4 1 Whole introduction of baseband circuit 21 3 4 2 Memory Management 21 3 4 3 SIM Card interface 22 3 4 4 Audio frequency circuit 24 3 4 5 LCD display circuit 28 3 4 6 T Flash card circuit 2...

Page 3: ...FLY E185 Service Manual CKT Confidential Page 3 of 47 5 2 USB CABLE DRIVER INSTALL 38 5 3 UPGRADE PROCEDURE 40 5 4 FAQ 45 6 1 DISASSEMBLING AND ASSEMBLING 45...

Page 4: ...FM one Camera Bluetooth PC Sync 3D G sensor BT etc E185 can support GSM 900 1800MHz also GPRS In order to support technicians to be familiar with E185 handset please master the method of servicing In...

Page 5: ...FLY E185 Service Manual Chapter 2 PCBA Overview 2 1 Top side CKT Confidential Page 5 of 47...

Page 6: ...FLY E185 Service Manual 2 2 Bottom side CKT Confidential Page 6 of 47...

Page 7: ...g Bluetooth baseband and link control protocol as well as the Bluetooth radio control MT6236 consists of the following subsystems Microcontroller Unit MCU Subsystem includes an ARM926EJ STM RISC proce...

Page 8: ...and a high performance radio block Power management unit a self contained power supply source which also controls the charging and system startup circuitry 3 2 Principle of RF circuit 3 2 1 GSM RF AD...

Page 9: ...P Figure 138illustrates interconnection around Baseband Front End In the figure the shadowed blocks compose Baseband Front End To enhance the capability of data processing of mobile phone and base sta...

Page 10: ...t of I Q signals Finally D A conversions are performed in TX mixed signal module and the output analog signal is output to RF module Additionally 8PSK Modulation intrinsically extends the bursts windo...

Page 11: ...each conversion is finished one set of I Q signals will be latched There exists a digital FIR filter for these I Q signals The result of filtering will be dumped to Baseband Serial Ports whenever RX...

Page 12: ...elect1 MDSEL2 MDSEL3 MDSEL4 in TX_CFG control register and these translated bits after modulation will become I Q digital signals with certain latency TDMA timer having a quarter bit timing accuracy g...

Page 13: ...of TX dump window and the first valid output of GMSK Modulator The reason is because the bit rate of TX symbols is 270 833 KHz and the output rate of GMSK Modulator is 4 333 MHz and therefore timing s...

Page 14: ...r Bit Count in TX_CFG control register Which will program the mode switching timing in QB count and the default value to switch the modulation mode is 24 QB count Additionally by programming GMSK_DTAP...

Page 15: ...from 0 to the wrap position In order to apply to cell synchronization and neighboring cell monitoring the wrap position can be changed by the MCU to shorten or lengthen a TDMA frame The wrap position...

Page 16: ...for the baseband are ready and then the system reset ends at the moment when the Vcore Va Vio Vm Vusb Vmc Vrf Vtcxoare fully turned on to ensure the correct timing and function After that baseband wo...

Page 17: ...LO state when the battery voltage drops below 2 5V In this state the Vrtc LDO will be shutdown Otherwise it draws very low quiescent current to prevent further discharging or even damage to the cells...

Page 18: ...information to the baseband If CHRIN is over 4 3V charger detection will be report to baseband and charger circuit will be enabled If the CHRIN voltage is over 7V charger will send an invalid signal...

Page 19: ...ches 4 1V the charger will be in the constant current charging mode 4 Full Constant Voltage Charging Mode While the batteryvoltagereaches4 1V a constant current with much shorter period is used for ch...

Page 20: ...d be calculated as ICHR x 55 Ax CSDAC_DATA 7 0 8 Current Sense A current sense circuit measures the voltage difference between VSEN and VBAT which could be used as a feedback signal for CSDAC driving...

Page 21: ...lar RAM are supported for maximum bandwidth Traditional devices such as burst flash and Pseudo SRAM are also supported For greatest compatibility the memory interface can also be used to connect to le...

Page 22: ...s two dedicated smart card interfaces to allow the MCU to access the two SIM cards Each interface can operate via 5terminals As shown is the Figure 22 SIMVCC SIMSEL SIMRST SIMCLK and SIMDATA are for o...

Page 23: ...ate with either 1 8V or 3V SIM cards All SIM cards contain a clock input a reset input and a bi directional data input output The clock and reset inputs to SIM cards are level shifted from the supply...

Page 24: ...external FM radio and voice playback through a headset Block diagram of audio front end Figure 129 shows the digital circuits block diagram of the audio front end The APB register block is an APB per...

Page 25: ...ee audio or external FM radio playback paths are also provided The audio stereo path facilitates CD quality playback external FM radio and voice playback through a headset The APB register block is an...

Page 26: ...FLY E185 Service Manual The Audio frequency circuit shows as below Figure 3 4 4 1 Microphone circuit Figure 3 4 4 2 Speaker circuit CKT Confidential Page 26 of 47...

Page 27: ...FLY E185 Service Manual Figure 3 4 4 3 Receiver circuit Figure 3 4 4 4 Earphone circuit MIC Figure 3 4 4 5 Earphone circuit Receiver CKT Confidential Page 27 of 47...

Page 28: ...mm Audio Jack circuit 3 4 5 LCD display circuit MT6236 contains a versatile LCD controller which is optimized for multimedia applications This controller supports many types of LCD modules and contain...

Page 29: ...ce E185 use a 5Pin Micro USB as the system interface Pin1 is for VCHG and USB_PWR Pin2 and Pin3 are used for Data Transmit TXD1 and Receive RXD1 and also controlled by U551 to switch to UART port whic...

Page 30: ...3 4 8 FM Radio circuit 3 4 9 Camera circuit MT6236 ISP incorporates a feature rich image signal processor to connect with a variety of image sensor components This processor consists of timing generat...

Page 31: ...ayer pattern raw data to YUV422 RGB565 data that is generated by lens sensor compensation unit The output of ISP is YCbCr888 data format which can be easily encoded by the compress engine It can be th...

Page 32: ...FLY E185 Service Manual 3 4 10 Bluetooth Circuit Figure 3 4 10 Bluetooth circuit 3 4 11 Vibrator circuit and G sensor Figure 3 4 11 1 Vibrator circuit CKT Confidential Page 32 of 47...

Page 33: ...alls No incoming audio No outgoing audio Can not receive call Can not dial out Bad voice quality and Low receiving volume z Other Function problem Can not Config No ringing tone No vibration Vibrator...

Page 34: ...VWIFI2V8 2 5V 2 8V 3 0V 3 3V VWIFI3V3 2 5V 2 8V 3 0V 3 3V VCAMA 1 5V 1 8V 2 5V 2 8V VA 2 8V VTCXO 2 8V VRF 2 8V V3GTX 2 5V 2 8V 3 0V 3 3V V3GRX 2 5V 2 8V 3 0V 3 3V VGP 1 3V 1 5V 1 8V 2 5V 2 8V 3 0V 3...

Page 35: ...ce PMIC Charging circuit and Baseband IC The software problem also can make the charging fail So when you face the charging abnormal issue you can check these components one by one to find out the pro...

Page 36: ...t pay more attention to the card socket to check whether it is soldered well 4 7 Can not download software There are many reasons that can lead to download failure First of all you must make sure that...

Page 37: ...maybe the RF circuit is cut off you need to check saw filter matching circuit antenna switch and control signal etc If the bit error is too high it maybe because of the saw filter is not qualified RF...

Page 38: ...Pack 2 or higher 5 2 USB Cable Driver Install Step one Find the file of PL2303 Prolific Driver Installer package path and then select the right package for your system Attention Do not connect the cab...

Page 39: ...dential Page 39 of 47 Figure 5 2 2 COM port Number of Prolific USB to Serial Step three Connect the mobile phone with upload cable Attention Do not power on the phone at this moment Figure 5 2 3 Hardw...

Page 40: ...ill be losing by the unfinished upgrade process Step one Run the Flash tool exe then you can see the window as Error prompt would pop up when you run Flash tool for the first time you can just click O...

Page 41: ...nual CKT Confidential Page 41 of 47 Figure 5 3 2 Download Agent File Setting Figure 5 3 3 Scatter File Setting Step three After select the scatVIVI all of the files which need to be downloading are li...

Page 42: ...Figure 5 3 4 Download bin File Setting Step four Click Options Firstly select the right COM port in use Secondly select Format FAT Auto At last click Backup and Restore No action and then select Backu...

Page 43: ...ential Page 43 of 47 Figure 5 3 6 Format FAT AUTO Setting Figure 5 3 7 Backup and Restore Setting Step five Click Download and then power on the phone The progress bar will move and begin downloading...

Page 44: ...FLY E185 Service Manual CKT Confidential Page 44 of 47 Figure 5 3 9 Download process Step six Downloading succeeds when the below picture occurs Figure 5 3 10 Downloading succeed...

Page 45: ...ation data Thirdly using the IMEI Write Tool to re write the IMEI to the mobile terminal Case three What should we do when the downloading process is completely Solution You should check the Calibrati...

Page 46: ...CKT Confidential Page 46 of 47 Step3 wheel the screws Step 4 disassembling the bottom cover Step 5 Disconnect the touch screen FPC Step6 Take out the main board Step7 Remove the speaker and vibrator...

Page 47: ...anual E185 Mainly components as following TIP 1 Reversing the disassembling procedure is the assembling process 2 After modifying the power key please pay attention to the POWER KEY board CKT Confiden...

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