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FLY 2080
SERVICE MANUAL
Model ： FLY 2080
Edition ： V1.0；
Number ： XIKE2006V1.0；
Date： Nov.1 2006
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Content
Chapter One . Ecumenic description………………………………………………………………………………….4
1.1 Product summarize ……………………………………………………………………………………………….4
1.2 Technique standard ……………………………………………………………………………………………… 4
Chapter Two : Using way of servicing and examination tool ……………………………………………………….4
2.1 Notice of servicing ……………………………………………………………………………………………….4
2.2 Select of testing meter ……………………………………………………………………………………………4
2.3 Setting of power supply ………………………………………………………………………………………….7
2.4 Connection of hardware ………………………………………………………………………………………..6
2.5 Software for download tool…………………………………………………………………………………….…6
2.6 Software of testing ( debugging ) tool of handset ………………………………………………………………10
Chapter Three : Principle of circuit and analysis of failures ………………………………………………………11
3.1 Principle of RF circuit …………………………………………………………………………………………11
3.1.1 Principle of receiver circuit ………………………………………………………………………….…..11
3.1.2 Principle of sending circuit ……………………………………………………………………………...11
3. 2 The principle of base band circuit …………………………………………………………………………...44
3.2.1 The whole introduction of base band circuit …………………………………………………………….35
3.2.2 Explanation of power circuit and in-and-out circuit …………………………………………………….36
3.2.3 Connector circuit of SIM card ………………………………………………………………………. ….48
3.2.4 Principle of audio frequency circuit………………………………………………………………….…40
3.2.5 Circuit of LCD display ……………………………………………………………………………….…43
3.2.6 CAMERA ………………………………………………………………………………………………..44
3.2.7 Blue Tooth ………………………………………………………………………………………………..45
3.2.8 Circuit of T-Flash Card connector ………………………………………………………………. ….….46
3.2.9 Circuit of communicate connector ……………………………………………………………………..47
3.2. 10 key interface …………………………………………………………………………………………..47
Chapter Four : Handset assemble picture , and important testing point ……………………………………….49
Chapter Five : Appendix of main parts ……………………………………………………………………………..55
5.1 CPU ( MT6226 M) ………………………………………………………………………………………………55
5.2 PCIC…………………………………………………………………………………………………………...…69
5.3 TRANSCEIVER( MT6129) ........................................................................................................................................... 55
Chapter Six : Analysis of common failures ……………………………………………………………………………62
6.1 Analysis of base band failures ……………………………………………………………………………………..62
6.1.1 The handset can not be switched on……………………………………………………………………………62
6.1.2 Display failure …………………………………………………………………………………………………62
6.1.3 Touch Panel failure……………………………………………………………………………………………62
6.1.4 Keys failures …………………………………………………………………………………………………..62
6.1.5 Voice cannot be sent or received……………………………………………………………………………....62
6.1.6 No voice in speaker ………………………………………………………………………………………...…63
6.1.7 Can not use camera function ………………………………………………………………………….………63
6.1.8 T-Flash card failures …………………………………………………………………………………………..63
6.1.9 Can not download software ……………………………………………………………………………………63
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6.2 Analysis of RF failure …………………………………………………………………………………………….63
Chapter One. Ecumenic description
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1.1 Product summarize
Size of figure (L*W*H):
104mmx42.5mmx10.5mm
Size of screen (L*w) :
65K 176*220 1.8” TFT
Standby time :
120 hours
Talking time :
2.5 hours
Style of network
GSM/GPRS
It’s the perfect combination of humanized design and excellent craft with streamline and comfortable handset.
Besides the basic call function, FLY2080 provides you with a collection of practical functions including color screen,
sweet ring tone, cartoon incoming call animation , File manager (T-Flash card support ) camera , recorder, MP3 .
It is also support MMS and increment service which facilitate your work and entertainment.
In order to support technicians to be familiar with FLY2080 handset , please predominate the method of servicing .
In addition , we provide corresponding technician data , including CKT base band , RF and software . Also , there
are many base band and RF testing reference point and description of circuit . You can refer part maintain
examples . Hope can support the technicians .
1.2 Technique standard
Main specification and technique standards of FLY2080 are as below :
Chapter Two : Using way of servicing and examination tool
2.1 Notice of servicing
Technicians should pay more attention not to break LCD when using high temperature maintain tool as the LCD is
directly welded in PCB . If you want to maintain this area, you would better to take the LCD off .
2.2 Software for download tool
1. PKUNZIP the ZIP file of “Multiport_Download_exe_common” and Copy the files to appointed
place .
2.Find the icon in the file ‘download’ and open it run the download platform as the follow picture
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Remark: Error prompt will appear when first running the software, because of the
difference of configuration files. Just press ‘OK’ and skip it.
3. Parameters setup
1） Run the software as upper picture, open ‘open download agent file’ in ‘File’, choose the folder
‘download’ and open it, double click the file ‘MTK_AllInOne_DA’ and the route of this file will appear in
‘DA file name’.
2） Then open ‘open scatter file’ in ‘File’, choose the folder ‘download’ and open it, double click the
file ‘scat_ROM’ and the route of this file will appear in ‘scatter file name’.
3）In ‘option’, choose ‘auto detect’ in ‘baseband chip’ and ‘26MHZ’ in ‘external clock’. Make sure
not choose ‘check ECO version’ in ‘baseband chip option’.
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4）Click “ROM “ in “name “ , select the software you need to download . For example ,
FLY2080_2_10_13_xx1S0X75_227.bin software . Double click the file name , the trace of the file will
appear .
5）Choose port ‘COM1’, speed ‘115200’ if there is no data accelerate card and USB download cable is
not chosen. Otherwise choose appropriate download speed. (Install the driver of data cable first)
4. Download
Plug the data cable to 1 port on computer. User should know the port the data cable occupies, e.g.
COM1 or COM3, and so on.
4.1 : As the right side of the upper picture shows, choose the mode ‘Download Rom’ under ‘Type’.
Caution: If choose other modes, the data that factory calibrated will be eliminated after download and
failures may occur on the handset. Suggest choosing ‘Download Rom’ for common users.
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4. Suppose the occupied port is COM3, click to make a hook on the check box of ‘COM3’, then click
‘download’ button. Install the battery to the handset and plug the data cable to the handset.
4.3 The progress bar will be red after the computer has detected the handset. The red progress bar will
change to blue when it reaches 100%, and the blue will change to green when 100%. When the green
progress bar is 100%, the download is finished. ‘FR OK’ will be displayed.
5. How to check the current software version
Entering ‘*#18375#’ under standby mode, and then the current software version will be displayed on
the LCD, e.g. SW：FLY2080_2_10_13_xx1S0X75_227 . Press return or off key to back to standby
mode.
6. When need to download software
6.1 Upgrade software to higher version. Bugs of function and performance will appear during using the
handset. To improve the function and performance of the handset, the manufacturer will improve the
software and release new software version. Users can download new version to improve the function
and performance of the handset.
6.2 Program errors or disorder because of improper setting by users, e.g. the handset can’t power on, or
being locked, and so on.
6.3 In principle, it is not allowed to download a software lower than the current version, unless otherwise
specified.
Caution: Before downloading 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 environment.
2.3 Software of testing (debugging ) tool of handset
Software of testing (debugging )tool using META Ver 3.5.06 as MTK flat roof .
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Chapter Three : Principle of circuit and analysis of failures
Picture 3.1 MT6226M principle picture
3.1 Principle of RF circuit
3.1.1 Principle of receiver circuit
1. Rx signal flow chart :
Picture 3.1.1 Receive signal flow frame
2.Main function of RF
RF part generally means the analog RF and IF process system ,including Antenna system、TX
path、RX path、Analog modem and Frequency Synthesizer .
RF Circuit deals with the RX and TX of wireless signal , with responsibility for the bidirectional
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transmission of speech and signaling between the MS and BS through the air interface. In detail RX
part accomplishes the AGC amplify,mixer and demodulation of RF weak signal received from BS,
The final signal output from RX part is the analog baseband I/Q signal.The final RX I/Q will be
sent to Baseband Circuit for later disposal. On the other hand TX part deals with the signal
modulation, up-conversion mixer and power amplify of analog I/Q signal received from baseband,
generating burst which meets the GSM specification. And then the bursts are transmitted to
Basestation through the antenna.The signal interface between RF Circuit and Baseband is analog
baseband I/Q signal.The performance of RF Circuit can directly affects the signal transmission
quality of the mobile phone!
The schematic of RF block for MTK GSM triband RF solution is show below::
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From the chart we can see that the RF part is mainly composed of a highly integrated CMOS
transceiver chip (MT612X) ,some RX Saw filters ,reference crystal oscillator, power amplifier, antenna
switch module, antenna and the matching components between each other..
3.1.2 Function Description and analysis of RF circuit
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3.1.2.1 Receiver
3.1.2.2 Transmitter
3.1.2..3 TX VCO
3.1..4 Frequency Synthesizer
3.1.5 Digital Calibration Loop
3.1.6 Fast-Acquisition System
.5 Voltage Control Crystal Oscillator
3.1.2..8 Regulator
3.1.2.1 Receiver
The receiver section of MT612X includes Quad -band low noise amplifiers (LNAs), RF quadrature
mixers, an on-chip
channel filter, Programmable Gain Amplifiers (PGAs), quadrature second mixers, and a final low-pass
filter. The very
low -IF MT612X uses image-rejection mixers and filters to eliminate interference. With accurate RF
quadrature signal
generation and mixer matching techniques, the image rejection of the MT612X can reach 35 dB for all
bands. The fully
integrated channel filters rejects interference, blocking signals, and images without any external
components. Compared
to a direct conversion receiver (DCR), MT612X's very low-IF architecture improves the blocking
rejection, AM suppression,
as well as the adjacent channel interference performance. Moreover, the very low-IF architecture
eliminates the need for complicated DC offset calibration that is necessary in a DCR architecture. In
addition, the
common-mode balance requirement of the SAW filter input is relaxed. The MT612X provides the
analog IQ baseband
output without any extra frequency conversion components.
The MT612X includes four differential LNAs for GSM 850 (869 MHz ¨C 893 MHz), E -GSM
900 (925 MHz-960 MHz), DCS 1800 (1805 MHz-1880 MHz) and PCS 1900 (1930 MHz ¨C1990 MHz).
The differential inputs are matched to 200 SAW filters using LC networks. The gain of the LNAs can
be controlled either high or low for an additional 35 dB dynamic range control. Following the LNAs are
the image-rejection quadrature RF mixers that down-convert the RF signal to the IF frequency. N o
external components are needed at the output of the RF mixers. The IF signal is then filtered and
amplified through an image-rejection filter and a PGA. The multi-stage PGA is implemented between
filtering stages to control the gain of the receiver. With 2 dB gain steps, a 78 dB dynamic range of the
PGA ensures a proper signal level for demodulation. The quadrature 2nd mixers are provided on-chip to
down convert IF signal to baseband in an analog differential IQ format
Receiver forwarded antenna switch circuit as following:
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RX Saw filter Circuit:
3.1.2.2 Transmitter
The MT612X transmitter section consists of two on-chip TX VCOs, buffer amplifiers, a
down-converting mixer, a
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quadrature modulator, an analog phase detector (PD) and a digital phase frequency detector (PFD), each
with a
charge pump output and on chip loop filter. The dividers and loop filters are used to achieve the desired
IF frequency
from the down-conversion mixer and quadrature modulator. For a given transmission channel, the
transmitter will
select one of the two different TX reference dividing numbers. These built-in components, along with an
internal
voltage controlled oscillator (TX VCO) and a loop filter, implement a translation loop modulator. The
TX VCO output is
fed to the power amplifier (PA). A control loop, implemented externally, is used to control the PA's
output power level.
TX PA: RF3166
3.1.2.3 TX VCO
Two power VCOs are integrated with OPLL to form a complete transmitter circuit. The TX VCO output
power is typically
9 dBm with +/- 2.5dB variation in E-GSM 900/ GSM850 bands and +8 dBm output power with +/- 2dB
variation in
DCS1800 / PCS 1900 bands over extreme temperature conditions. Inside the chip, the VCO
differential output signals
are fed into the output buffer, the OPLL input feedback buffer, and the calibration circuit. The off chip
signal is transformed
into a single ended output which needs impedance matching to 50¡ê[ to drive the power amplifier. Like
RF VCO, the oscillation bandwidth is partitioned into 128 (or 64) sub-bands for DCS/ PCS (for
E-GSM900/ GSM850) TX VCO to cover the process and temperature variation. Calibration process
begins after a period of programmable time when the on chip TX VCO regulator is turned on. Total
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calibration time needs about 60us maximally and the frequency error after calibration is within +/-5
MHz. For Vtune=1.2 V, the variation of kvco is about 14% and 40% for GSM and DCS/PCS TX VCO,
respectively, across the desired frequency range.
3.1.2. 4 Frequency Synthesizer
Synthesizer System Description
The MT612X includes a frequency synthesizer with a fully integrated RF VCO to generate RX
and TX local oscillator frequencies. T he PLL locks the RF VCO to a precision reference frequency at 26
MHz. In order to reduce the inherent spur caused by fractional-N synthesizers, a 3rd-order sigma-delta
modulator with dithering function is used to generate the prescaler divider number N. The prescaler is
based on a multi-modulus architecture with programmable divider numbers ranging from 64 to 127. A
conventional digital-type PFD with a charge pump is used for phase comparison in the PLL. By
changing the output current of the charge pump, the phase detector gain can be programmed from75/¦Ð
¦ÌA/rad to 600/¦Ð ¦ÌA/rad.
To reduce the acquisition time or to enable fast settling time for multi-slot data services such as
GPRS, a digital loop (calibration loop) along with a fast-acquisition system are implemented in the
synthesizer. Once the synthesizer is programmed, the RF VCO is pre-set to the vicinity of the desired
frequency by a digital calibration loop. After the calibration, a fast-acquisition system is utilized for a
period of time to facilitate fast locking. Once the acquisition is done, the PLL reverts back to the normal
operation mode.
The frequency ranges of the synthesizer for RX mode:
RX mode
GSM 850 1737 MHz ~ 1788 MHz
E-GSM 9 00 1850 MHz ~ 1920 MHz
DCS 1800 1805 MHz ~ 1880 MHz
PCS 1900 1930 MHz ~ 1990 MHz.
The frequency ranges of the synthesizer for TX mode
TX mode GSM850 1813 MHz ~ 1868 MHz
EGSM900 1936 MHz ~ 2059 MHz
DCS1800 1881 MHz ~ 2008 MHz
PCS1900 2035 MHz ~ 2149 MHz
26MHz Clock Reference circuit:
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3.1.2..5 Digital Calibration Loop
The MT612X uses a digital calibration technique to reduce the PLL settling time. Once the RF
synthesizer is programmed through a 3 -wire serial interface, the calibration loop is activated. The main
function of the calibration loop is to preset the RF VCO to the vicinity of the desired frequency quickly
and correctly, thus aiding the PLL to settle faster. On the other hand, since a large portion of initial
frequency error is dealt with by the integrated calibration loop, the overall locking time can be
drastically reduced, irrespective of the desired frequency.
3.1.2.6 Fast-Acquisition System
After the digital calibration loop presets the RFVCO, the RF synthesizer reverts to the PLL operation
and a fast-acquisition system is activated. For faster settling, the charge pump current is set to a higher
current than normal setting for a period of time, typically, 20 us or 60 us.
3.1.2.7 Voltage Control Crystal Oscillator
Voltage Control Crystal Oscillator (VCXO) consists of an amplifier, a buffer, and a
programmable capacitor array. The
VCXO provides the MT612X with a selectable reference frequency of either 13 MHz or 26 MHz. The
amplifier is designed to be in series resonance with a standard 26 MHz crystal. The crystal is connected
from the input pin XTAL of amplifier to ground through a series load capacitance. The buffer provides
a typical 600mVpp voltage swing a t either 13 MHz or 26 MHz. It is designed to drive a tuned load to
improve harmonic contents and reduce the oscillator current consumption. The capacitor array, from
0.0625 pF to 4 pF in steps of 0.0625 pF, is used to shunt the series load capacitor for coarse tuning and
remove any fixed offsets due to crystal manufacturing variations. An internal varactor that provides
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fine tuning combines with the capacitor array.
As an alternative, the reference frequency can be provided by an external 26 MHz VCTCXO module.
When pin VCXOCXR is tied to the VCCVCXO supply, the XTAL pin will accept an external signal.
Furthermore, the VCXO control pin can be tied to VCCVCXO to prevent the current leakage during the
sleep mode operation.
3.1.2..8 Regulator
The MT612X internal regulators provide low noise, stable, temperature and process independent supply
voltages to critical
blocks in the transceiver. An internal P-channel MOSFET pass transistor is used to achieve a low
dropout (LDO) voltage of less than 150 mV in all regulators.
3-3: MT612X Function Block Diagram
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4. RF Service manual
The mostly fail cases:
Fail to download; Fail to power up; Fail to make a call (due to RX or TX); Fail to charge; RX/TX
power fail; Audio malfunction; No vibration; No display; Power supply fail; SIM check fail and so on.
In mobile circuit system, all the electrical connecting trace can be divided into three types such as
power supply trace ,controlling trace and signal carried trace . When analyzing the RF fail case ,for the
active circuit we should first eliminate the power supply malfunction ,then control circuit and then
along with the signal flow path to remove the fail issue step by step. When debugging the RF
malfunction, we should diagnose the RX part first and then the TX..
With the help of oscilloscope we can diagnose power supply trouble, control signal trouble or some
low frequency signals such as I/Q signal ,RTC siganl, crystal oscillator signal and so on. We can measure
the signal features such as amplitude, frequency, duty cycle etc. We can also use multimeter to measure
power supply DC voltage. For RF signal. We usually use spectrum analyzer to check signal spectrum
amplitude in frequency field.
We provide a useful phone maintain software - META . Some introduction about META are showed
below:
4.1 CKT maintain software introduction －META
4.1.1 META－RF TOOL
Step 1. Open Maui META and select correct COM port ，META status window shows‘Please reset
target’ ,otherwise if it is in‘Connect with target’status, please click ‘Reconnect’。
Step 2: Connect the download cable between the corresponding computer COM port and the target
MS and power on the mobile .At this time META will detect the mobile and order the mobile into META
mode. The META status window will then change to ‘Connect with target’.And then you may select RF
Tool from the pull down menu.
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Just pop up the RF tool option group as below:
并
4.1.2 The features of META
RF ToolPM
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