Fly 2080 Service Manual

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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 ToolPM

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1. PM is used for measuring the receiver Rxlev at a given RX channel:

Testing result of Power

A t first you should config the Universal wireless communication tester such as Agilent 8960 . or
R&S CMU200 for the corresponding setup, please follow below picture for your configuration
guide:

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In META page PM, please click RX Path Loss Setting into AGC PATH LOSS setting page. Click

upload from flash button to read the RX path loss parameter form 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’s RX path loss parameters with different channels in the AGC
path loss window. Please note that all the RX loss values should be in the tolerance range of ＋/

－5dB,otherwise it should be a hardware failure.

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Follow below settings and press ‘start’ button to active RX measurement. Due to the System
simulator (8960) downlink Cell power is －70dbm,The Ant power reported from the mobile
should be about －70dbm, tolerance+-5dB.Otherwise it means some defect with RX path. Please
check the GSM RX SAW and the surrounding circuit, ASM and RF test connector.

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For DCS/PCS band, do the same operation except for the band select and the 8960 band settings.
Note that the ARFCN should be the same setting as the 8960 Broadcast chan.

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 RF ToolTX level 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.

Set the 8960 to non-signal mode

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TX level and profile TSC 为 5

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Set Expect burst TSC code of 8960 the same as META indicated.

Set 8960 Traffic band for EGSM, Traffic Channel to 20,MS TX Level:5 and wait for receiving the

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MS burst.

Press GMSK level and ramp setting button into GMSK APC profile setting page：

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Follow below setting page the set the corresponding TX parameters：ARFCN,TSC,PCL DAC

etc.and then click Start button to start transmitte burst.

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

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If you can not see anything or it shows fail in the 8960’s PVT window, please follow below debug wizard
to check and remove all the failure about TX path.

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1. First of all we use oscilloscope to check PA TX enable control signal waveform：PA_EN, The

mormal case shows below; Otherwise please check Baseband circuit.

2. PA Vapc control signal waveform ：VAPC （GSM LEV5）

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3. Antenna switch control singal：LB_TX:

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3.2 Principle of base band circuit

3.2.1 Whole introduction of base band circuit

3.2.2 Explanation of power circuit and in-and-out circuit

Power source is provided by MTK mt6305 and periphery components,main function as below:
a. supply with power for the modules of baseband chip and transceiver
b. manage the charger state
c. SIM card voltage convert
d. LED driver
e. Over Voltage Protection
f. Power-on Reset and Start-up Timer
MT6305B input voltage range from 2.8V～5.5V, the maximun charger voltage is 15V,but for protecting the other
components, if the charger voltage over 8V～9.5V,MT6305B can disable the charger function.

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1、7 channel power supply

Power

Press

current

（max）

Function

VCORE

1.8V/1.2V

200mA

Digital Core LDO

VDD

2.8V

100mA

Digital IO LDO

AVDD

2.8V

150mA

Analog LDO

VTCXO

2.8V

20mA

TCXO LDO

VMEM

1.8V/2.8V

150mA

Memory LDO

1.8V(Intel);2.8V(Spansion)

VSIM

1.8V/3.0V

20mA

SIM LDO，supply1.8V and 3V SIM card

VRTC

1.5V/1.2V

200A

RTC LDO,MT6226M use 1.5V

MT6305B 7 channel power supply)

MT6305B 7 channel power supply:

2、power on/off circuit

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After the handset power off, the pin PWRKEY is pull high, the pullup resistance is inside the

chip .When the power key is pressed, the pin PWRKEY is pull low, then the MT6205B turne on all the

power supply function, and the baseband chip enter working state, so the pin BBWAKEUP is pull high,at

that time, the power key can be release, the CPU-baseband chip can control the MT6305B.

Charge Circuit

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charge circuit

MT6305B charge management function:

1、 Charger detection
2、 Battery voltage measurement
3、 Charging current measurement
4、 Over voltage Protection
5、 Charge mode selection

MT6305B is available to control the pulsed charging current.The pin CHRIN is to detect the charger.

The pin ISENCE/NC can calculate the battery voltage by detect the voltage of RN400,and calculate the

charge current by the voltage of the resistance R413.At the different charge mode.The Baseband chip

sent the different PWM pulse signal to the MT6305B pin CHRCNTL,so the MT6305

can control the process of charge.

The charge process include three state: pre-charging mode ,constant current mode, constant voltage mode.

If the battery voltage is bellow 3.2V,the handset enter pre-chargeing mode; If the battery voltage is over

3.2V,it enter the constant current mode ;If the battery voltage is over 4.2V, it enter the constant voltage
mode.

3.2.3 SIM interface

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SIM interface circuit

The power management chip supply the interface between the SIM card and baseband chip,
the key signal is: CLK(the clock signal),RET(the reset signal),I/O(I/O signal),VCC(SIM
power supply).

3.2.4

Principle of audio frequency circuit

The Audio Frequency(AF) circuit includes three parts: RECEIVER and LOUDER SPEAKER,HANDSET
MIC,ERAPHONE and HANDFREE MIC.FLY2080 uses 2 in 1 speaker, that means the receiver and the louder speaker
share the same speaker.

The speaker is drived by a AF amplifier. The baseband chip sends the AF signal to the AF amplifier though
MP3_OUT port. After the AF signal is amplified by the amplifier, it is sent to the speaker. The RECIEVER is drived by
the baseband chip directly. As an electret tone arm, the MIC needed power support when working. The MICBIASP/N
ports of the baseband chip suport bias voltage for the Mic. The EARPHONE port of the FLY2080 is reused by the USB
port. The detail explain of this port will be given late in “communication ports” part.

1、 receiver and louder spk

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Figure 3.2.5 Circuit of receiver and louder speaker

2、 Handset mic

Figure 3.2.6 MIC bias voltage circuit of mobile phone

3. Earphone , handsfree mic

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Figure 3.2.6 MIC bias voltage circuit of mobile phone

Figure 3.2.8 earphone’s speaker circuit

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3.2.5 LCD and Touch Panel circuit

Because forepart BaseBand periphery and ROM synchronization using Bus, conduce system tardiness,
hardware system change for MTK,ROM and LCD, Nand separate, synchronization using 52M clock,thus
enabling real-time creation and playback of mp3,mp4 multi-media. This interface enables connection to
LCD modules as well as connection to NAND flash devices to allow for multi-media data storage
capabilities.

Figure 3.2.9 FLY2080 LCD interface circuit

LPCEOB_MAIN_LCM is LCM select signal.LPA0 is lcd controller address output,LWRB is lcm
interface write strobe, LRSTB is reset signal, all signal for baseband controller,NLD0~NLD15 is data
signal,connect to baseband and nand flash.

Data interface using 16 bit:NLD0-NLD15,controller for four
signal:lpceob_main_lcm,lwrb,lpa0,display data get across DMA controller connect NAND bus to
LCD_DRIVER of videoram, display of refurbish RAM, beause of system of world velocity very quick

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when the media player have in hand, neither mosaic nor the feel of flash. XINGLI background light
commonality positive, only using three LED.;LED+ is lcd background light positiv,LED1-,LED2-,LED3­is lcd background light negative, for U403 (aat3157)drive. U407(TSC2046 or AK4182) is Touch panel
drive, controller signal:GPIO11_TP_LSDIN, GPIO16_TP_LSCK, GPIO17_TP_LSAO,
GPIO18_TP_LSDA, GPIO19_TP_LSCEOB, EINT3_PENIRQ. Controller for four signals: X+, X-, Y+,
Y-.

Figure 3.2.10 FLY2080 LCD backlight circuit

The Aat3157 is a s2c serial controller high efficiency for white led applications,16 current levels,
Tri-mode 1x,1.5x and 2x charge pump for maximum efficiency and vf coverage, the low-current mode

supply current can be to save power.

3.2.6 CAMERA

MT6226 incorporates a feature rich image signal processor to connet with a variety of image sensor components.Color
process unit accepts Bayer pattern raw data or 8bit/10bit RGB data that is generated by lens/sensor compensation
unit.capable of processing image of size up to 1.3M pixels, lens shading compensation, defect pixel correction,optical
correction, color correction matrix, Gamma Correction, automatic Exposure Control, automatic focus control, automatic
white balance control, Camera sensor using ov9660 and Samsung s5k4aa,the Camera sensor output RGB signal, interior
ISP processor of import signal, output to LCD display. LDO(u404,u405) supply singleness power.

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figure 3.2.10 CAMERA circuit

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figure 3.2.11 CAMERA powersource

CAMERA power supply LDO supply 1.8v and 2.8v, the gpio9 is sccb i/o signal,the gpio8 is sccb clock signal,cmrst

is reset signal, the cmd ata0-cmd ata9 is data signal,cmmclk is system clock, cmpclk is image sensor pixel clock signal.

3.2.7 Blue Tooth circuit

Blue Tooth circuit controller signal:GPIO41_BT_DISCON, EINT1_BT, GPIO6_BT_WAKEUP, BT_DAISYNC,
BT_DAIPCMN, BT_DAICLK, GPIO39_BT_RESETB, BT_UTXD3, BT_URXD3, BT_URTS3, BT_UCTS3.
LDO(u505) supply singleness power. U510(SQ3D02600B21NE) is 26MHz crystal. U507(BC313143A) is Blue Tooth
circuit core chip.

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3.2.8 T－Flash circuit

figure 3.2.12 SD card Circuit

T-Flash card interface:The MCINS is T-Flash card dectect,the MCCK is T-Flash card clock

signal,the MCCMO is T-Flash Bus state signal,MCDA0-MCDA3 is data io,power supply for

mt6305.

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3.2.9 system interface

figure 3.2.13 systerm interface circuit
FLY2080 use a 8pin mini SUB as system interface,and PIN5,6 is UART port used for code download and
calibration;PIN2,3,4,8 as USB port,used for data download;PIN 5,6,7,8 used as earphone interface.details:
UART PIN: pin5 is RX for data receive, pin7 for data transmission;pin8 for GND.
USB PIN:PIN2 for usb power ,specified 5v/500ma input,pin3 for data positive，pin4 for data cathode。
Earphone PIN: pin5, 6 for audio output, duplicated with UART, pin 7 for mic input.
U802 is a analog switch, can change to earphone or UART if needed, UART_EN is default low,so system
connected to UART,C3 direct to c1, A3 derect to A1,thus code can download and calibration; when UART_EN is
high,C3 direct to C4,A3 direct to A4,thus earphone is connected.

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3.2.10 key interface

analog switch for judge USB or earphone used

When key press down,the matrix KCOLX(0~5) status is low,interrupt is occurred,Baseband judge the key

location,so system carry out corresponding function.

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Chapter Four : Handset assemble picture , and important testing point

一）PCBA sketch map

1. Obverse assembly 1 (Including LCD, motor, speaker, antenna, keypad)

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Reversed assembly ( including battery , motor , speaker , camera , antenna )

二）PCBA components and testpoints

1) PCBA bottom components and testpoints

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CAMERA
connector（24PIN）

BATTERY
CONNECTOR

RF PF ：
RF3166

RF TRANCEIVER
IC

RF connector

2）PCBA top components and testpoints

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Chapter Five: Appendix of main parts

5.1 CPU（MT6226M）

MT6226M introduction
MT6226M is a updated baseband chip, dimension is 13mmx13mm,TFBGA package,296 pins.MT6226M
integrated strong multimedia such as MP3,MP4,the chip base on 32-bits ARM7EJ-S™RISC，MT6226M
not only provided high quality GPRS class 12 modem, but also advanced multimedia application, such as

1.3M pixels camera and MP4 encoder.

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figure 5.1.1MT6226M pin diagram

pin difinition and explain

part 1

including below:
GPIO PORT, is universal io port, can control perpheral equipment.GPIO0 for backlight control,FPIO2,8,9for
camera Control,GPIO3 for motor control.

1. 26MHZ is system clock, provided for all baseband and RF circuit.

2. 32khz real time clock

3. BBWAKEUP is for wakeup baseband, can startup the system if power on timer is working.

4. BPI control RF transceiver, for changing frequence channel, receiving, transmetting.

5. BSI is for RF seriel control, setting freqence, gain etc.

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6. SIM controlling sigal

figue 5.1.2 MT6226M PIN diagram 1
part2

including below:

1、 external interrupt pin
2、 SD card control pin
3、 USB pin
4、 ED pin for flash data thansfer
5、 KP_BL_PWM for key backlight cotrol

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part3

this part including as below:

1、 KROW/KCOL for keymatrix interface
2、 NLD for LCD dataport
3、 P1~5、R4 for nand flash control pin

figue 5.1.2 MT6226M PIN diagram 2

figue 5.1.2 MT6226M PIN diagram 3

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QB [6]

MICN0[2]

SPKN0[2]

MICP0[2]

SPKP0[2]

IB [6]

MICN1[2]

I [6]

MICP1[2]

MICBIASP
MICBIASN

VREFN
VREFP

VAFC [6]

VAPC [6]

ADC1_I+ [4]

ADC0_I- [4]
ADC2_TBAT [4]

SPKP1[2]

ADC4_USB [3]
ADC5_HF_MIC [2]

FM_INL[5]

FM_INR[5]

C105 4.7n

C107 47n

C104
1n

C110
nc 100n/10V (X5R)

C111

nc 100n/10V (X5R)

MP3_OUTR[2]

MP3_OUTL[2]

U100C

MT6226M

AFC

B4

AFC_BYP

A4

AU_MOUTL

B15

AU_MOUTR

A15

AU_ML_BYP

C14

AU_FMINL

B14

AU_FMINR

A14

AU_OUT1_P

D13

AU_OUT1_N

C13

AU_OUT0_N

B12

AU_OUT0_P

A12

AU_MICBIAS_P

C12

AU_MICBIAS_N

D12

AU_VREF_N

C11

AU_VREF_P

B11

AU_VIN0_P

D10

AU_VIN0_N

C10

AU_VIN1_N

B10

AU_VIN1_P

A10

BDLAQP

D9

BDLAQN

C9

BDLAIN

A9

BDLAIP

B9

BUPAIP

B8

BUPAIN

A8

BUPAQN

C8

BUPAQP

D8

APC

B7

AUXADIN0

D6

AUXADIN1

C6

AUXADIN2

B6

AUXADIN3

A6

AUXADIN4

C5

AUXADIN5

B5

AUXADIN6

A5

Q [6]

PART4
this part including below:

1、 L1~5 is LCM control pin
2、 SYSTEM RESETpin
3、 control pin
4、 for audio PA control pin
5、 charge control pin
6、 memory address signal
7、 read and write pin

Part 5

This part including analog baseband, as below:
1、 audio pin, including MP3,speaker,mic etc.
2、 IO signal pin
3、 ADC pin
4、 auto frequence control pin
5、 auto power control pin

figue 5.1.2 MT6226M PIN diagram 4

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figure 5.1.6 MT6226M pin diagram 5

VCORE

MT6227_POWER

CMRST5

CMPCLK5

U100D

MT6226M

CMVREF

H12

CMHREF

H11

CMPCLK

H9

CMMCLK

H10

CMDAT7

K8

CMDAT6

L8

CMDAT5

M8

CMDAT4

M9

CMDAT3

M10

CMDAT2

M11

CMDAT1/GPIO50/MCDA5

M12

CMDAT0/GPIO51/MCDA4

L12

NC

A1

NC

J15

NC

R9

CMRST/GPIO48

J12

CMPDN/GPIO49

K12

CMDAT8

J8

CMDAT9

H8

NC

D15

GND

E12

NC

E7

NC

A3

NC

E13

VCORE

E11

NC

E6

NC

D4

NLD15

L11

NLD10

J11

NLD8

J9

NLD12

K11

NLD9

J10

NLD11

K9

NLD13

L9

NLD14

L10

NLD16/GPIO55/MCDA6

G6

NLD17/GPIO56/MCDA7/DSP_TID0

F6

NC

K5

NC

F7

CMDATA15

CMDATA05

CMDATA35

CMDATA25

CMDATA65

CMDATA55

CMDATA45

CMDATA95

CMDATA85

CMDATA75

CMMCLK5

CMHREF5

CMVREF5

Part 6
This part introduce CAMERA data and control pin

figure 5.1.7 MT6226M pin diagram 6

5.2 PMIC MT6305B

Brief introcuction

MT6305B is a specialized PMIC for MTK solution. It provided all the LDO output votage to baseband,key backlight,
charger control, sim lever shifter etc..and the different between MT6305B and MT6305 is :1,VCORE/VRTC voltage is
selectable between 1.8/1.2v and 1.5v/1.2v, VCORE/VRTC is 1.2v/1.2V when pin3# is pull GND. or VCORE/VRTC is

1.8v/1.5v. 2, PMIC could auto pause when charger input voltage over 8~9.5v thus protect internal circuit.
pin diagram

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figure 5.2.1 PMIC pin Diagram

5.3 Transceiver( MT6129)

brief introduction
MT6219 is a high integrated RF transceiver chip. Including 4 LNA(low noise amplifier),2 RF quadrature mixers,an
integrated channel filter, programmable gain amplifers(PGA),an IQ demodulator for the receiver, a precision IQ
modulator with offset PLL the transmitter, two internal TX VCOs, a VCXO, on-chip regulators, and a fully
programmable sigma-delta fractional-N systhesizer with an on-chip RF VCO. All the circuit can satisfy different mode.
pin and internal diagram as below

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figure 5.3.1 RF transceiver chip internal diagram

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Chapter Six : Analysis of common failures

6.1 Analysis of base band failures

6.1.1 The handset can not be power on

Too fault can induce the phone can’t power on, but roughly speaking have two:1.can’t download the code;2.don’t

open the phone. to solve the fault, you must :press power key, then measure all the LDO output of PMIC.

Interrelated components mainly as below:MT6305B,MT6226M,MCP Flash，MT6129,26MHZ VCTCXO, 32KHZ
crystal. you can measuret the 7-route LDO voltage: VCORE（1.8V）、 VDD（2.8V）、 VADD（2.8V）、 VTCXO（2.8V）、
VRTC（1.5V）、 VMEM(2.8V).then measure if the 26MHZ,32KHZ signal output to baseband, if no fault occured,
continue check FLASH, baseband chip by download a code, if can download DA, indicate baseband if normal,
otherwise resoldering the baseband chip and memory .replace these chip if all the step can’t solve the fault.

6.1.2 Display failure

FLY2080 is a bar phone, LCM is soldering on the PCB directly, and void soldering can lead to display failure, you
can distinguish it, or measure the PIN if void soldering by digital multimeter, if no void soldering, maybe the LCM or
MAINPCBA problem, you can change the LCM, or repair the MAINPCBA.

6.1.3 Touch Panel failure

First change a good LCM, test it, if function ok, show the teared LCM is bad. Then check the connector, if no void
soldering, or you maybe reordering the U407 chip.

6.1.4 Keys failure

Key circuit is simpleness, key and backlight is located on a FPC, and connected to main PCB via a 16pin BTB, if
don’t aim at FPC with BTB when assembly maybe lead to pin stride. And multi-flex the FPC maybe leads the trace
breaking. And directly maintain method is change a good FPC, check the BTB, check the netvaristor is short or not, if
don’t resolve the fault, maybe reordering the BB chip.

6.1.5 Voice cannot be sent or received

This is a constant fault occurred in a mobile phone. you can enter into engineering mode be press
*#166*, first test item “receiver”, you can hear “du du” sound if well, otherwise test it’s resistance via
multimeter, receiver is 32ohm namely, if it’s resistance is great big show receiver is bad, change a good
one. Second test MIC, huff at MIC then receiver will have a echo , show the microphone is ok, or you
must check the microphone bias circuit, test bias voltage, and output signal, microphone resistance is 2.2k
OHM namely.

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6.1.6 No voice in speaker

To analyze this fault, we can test it’s headset ,check if audio source output from base band, then check speaker
resistance if 8ohm or not, if not ,speaker is bad; later check audio PA circuit .after repaired, you can test it on engineering
mode again.

6.1.7 Camera failure

First change a good camera module, test it, if function ok, show the teased camera is bad. Then check the connector,

check if U405, U406 output normally, test if camera signal is normal. Or you maybe resolder the BB chip.

6.1.8 T-Flash card failure

T-Flash card circuit is very simple, so you must pay more attention to the card quality itself.

6.1.9 Cannot download software

Too many faults can lead to download failure, especially the analog switch IC that duplicate UART with headset, so
you can pay more attention to it.

6.2 Analysis of RF failure

Rf failure could be often occurred on calibration or capability test, the best diagnoses manner is use wireless
universal tester, spectrum analyzer, signal source matched with META tool to test it.

As upper RF Analysis, effected components mainly is: antenna switch, saw filters, matching circuit etc is void
soldering or damaged. if receive power is very low or nothing, maybe the circuit is cut off ,need emphases on checking
saw filter, matching circuit, antenna switch, and control signal etc. if find bits error is higher maybe the saw filter is not
qualified .

Rf Transmit circuit associated components mainly as below: base band MT6226M, RF transceiver MT6129,
attenuator, RF PA, antenna switch etc, main test items including power value, power vs. time, modulation and switch
spectrum etc, theirs is too many components be included, please refer to upper RF charter.

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