FLY EZZY Service Manual Download Page 13 | Manualshive

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background image

1

23A 7 channe

supply:

．

7 channel power supply

MT62

l power

LDO Power Function

VCORE

.5V

1.8V/1

Digital core voltage LDO output

VDD

2.8V

Digital I/O voltage LDO output

AVDD

2.8V

Analog LDO output

VCTXO

2.8V

Crystal or VCTCXO LDO output

VMEM

tput

1.8V/2.8V

External memory LDO ou

VSIM

.3V

1.8V/3

LDO output to SIM card

VRF

LDO for RF transceiver

2.8V

2

、

power on/off circuit

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Summary of Contents for EZZY

Page 1: ...FLY EZZY SERVICE MANUAL...

Page 2: ...CONTEANT LIST Chapter 1 Summary Chapter 2 Exploding Diagram Chapter 3 Explanation of Schematic Chapter 4 Failure Analysis Chapter 5 Manual of tool software Chapter 6 Tools List...

Page 3: ...tion of humanized design and Excellent craft Besides the basic call function FLY EZZY provides you with a colle Functions including sweet ring tone cartoon incoming call animation File manager T Flash...

Page 4: ...Chapter 2 Exploding Diagram The main board PCB...

Page 5: ...The main board placement...

Page 6: ...1 Principle of RF circuit 3 1 1 Principle of receiver circuit 3 1 1 1Rx signal flow chart Picture 3 1 1 Receive signal flow frame 3 1 1 2 Main function of RF RF part generally means the analog RF and...

Page 7: ...with the signal modulation Up conversion mix and power amplifying of analog I Q signal received from baseband generating Burst which meets the GSM specification And then the bursts are transmitted to...

Page 8: ...ntegrated TX VCO and tank External TX filters eliminated Integrated Loop filter components Transmit Path AD6548 uses only a single VCO source to derive the local oscillator signal for both the Feedbac...

Page 9: ...e pump and The only external component is the frequency reference 26MHz Clock Reference circui d PLL system TX PATH 3 14 26MHz Clock The entire system including V loop filters are fully integrated 3 1...

Page 10: ...The frequency TX mode EGSM900 880 2MHz 914 8MHz DCS1800 1710 2 MHz 1784 8MHz Fully Integrated Loop fil Crystal Reference Oscillator Tuning System 3 wer Management The frequency ranges of the synthesi...

Page 11: ...3 1 3 AD6548 Function Block Diagram...

Page 12: ...ange Charger input up to 8V Seven LDOs optimized for specific GSM Sub systems D E One LDO for RF transceiver High operation efficiency and Low stand by current F Li Ion battery charge function G SIM C...

Page 13: ...V 1 8V 1 Digital core voltage LDO output VDD 2 8V Digital I O voltage LDO output AVDD 2 8V Analog LDO output VCTXO 2 8V Crystal or VCTCXO LDO output VMEM tput 1 8V 2 8V External memory LDO ou VSIM 3V...

Page 14: ...rge mode selection MT6223A is available to control the pulsed charging current The pin CHRIN is to detect the Charger The pins ISENCE BATSENES can calculate the battery voltage by detect the voltage o...

Page 15: ...HANDSET MIC ERAPHONE and HANDFREE MIC There are 4 speakers each speaker is drove by an AF amplifier The baseband chip sends the AF Signal to the AF amplifier though MP3_OUT port After the AF signal is...

Page 16: ...1 Receiver Figure 3 2 5 Circuit of receiver 2 Louder speaker Figure 3 2 6 Circuit of louder speaker...

Page 17: ...3 igure 3 2 7 Circuit of MIC bias voltage circuit of mobile phone Hands free microphone Figure 3 2 8 Circuit of Hands free microphone Handset microphone Earphone F 4 3 2 5 LCD circuit...

Page 18: ...of background light supplying Three voltage sensitive resisters are Needed to protect the LCD from electrostatic harm and extend the life of LCD ry and all the periphery equipments used the same bus...

Page 19: ...3 2 8 T Flash circuit T Flash card interface VDD is supplied by MT6233A 3 2 10 FM U600 is the FM chip to supply the function of FM radio...

Page 20: ...3 2 11 key interface s Then Baseband can judge the key s location so system implements corresponding function When key is pressed down the matrix KCOLX status is pulled down to low Interrupt occur...

Page 21: ...supply DC voltage For RF signal we usually use spectrum analyzer to check signal Spectrum and amplitude in frequency domain We provide a useful phone maintain software META Some introduction about MET...

Page 22: ...ust pay more attention to card socket to see if it is Soldered well 4 1 4 Keys failure K The BB chip at last 4 1 5 Voice cannot be sent or received This often occurs in a mobile phone You can enter in...

Page 23: ...nna switch saw filters matching circuit etc You need to check if one of them is bad soldering or damaged If power received is too low maybe the RF circuit is cut off you need to check saw filter match...

Page 24: ...can see the window as below 2 Click File first click Open Download Agent choose CUSTOM_AllInOne_DA in a Pop up window then click Open Scatter loading file choose scat At last click ROM Then you can s...

Page 25: ...rmat FAT choose Auto Format FAT in a pop up window Other settings you can leave them as software default 5 Download Then connect cable with handset and power on the phone The progress bar will move an...

Page 26: ...ading software please save all information and phone numbers in the handset After the software is downloaded the handset will delete all the information and restore to the factory default software env...

Page 27: ...5 3 2 The features of META RF Tool PM PM is used for measuring the receiver Rx level at a given RX channel...

Page 28: ...Testing result of Power At first you should configure the Universal wireless communication tester such as Agilent 8960 or R S CMU200 please follow the below picture for your configuration guide...

Page 29: ...the mobile If you have not loaded the correct database file yet META will notice you to open a database Please follow it and then you will see the target RX path loss parameters for different channel...

Page 30: ...om the mobile should be about 70dbm tolerance 5dB Otherwise it means there is some defect with RX path Please Check the GSM RX SAW and the surrounding circuit like ASM and RF test connector For DCS PC...

Page 31: ...evel and profile TX level and profile is intended for checking the Transmitter s output power ramping profile at a given channel and power control level TX level and profile TSC 5 Set the 8960 to non...

Page 32: ...Set Expect burst TSC code of 8960 the same as META indicated CONFIDENTIAL Set 8960 Traffic band for EGSM Traffic Channel to 20 MS TX Level 5 and wait for receiving...

Page 33: ...the MS burst Press GMSK level and ramp setting button into GMSK APC profile setting page...

Page 34: ...Follow below setting page the set the corresponding TX parameters ARFCN TSC PCL DAC etc Then click Start button to start transmitting burst...

Page 35: ...If the Target MS TX function is OK you may see a TX PVT profile from the 8960 as follows...

Page 36: ...60 s PVT window please follow below debug wizard to check and remove all the failure about TX path 1 First of all we use oscilloscope to check PA TX enable control signal waveform PA_EN The normal cas...

Page 37: ...eform VAPC GSM LEV5 Chapter 6 Tools List 5 1 Downloading Operation Manual Reference Flash_tool exe 5 2 Write SN Operation Manual Reference Maui META ver 6 0952 0 5 3 Calibration Operation Manual Refer...

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