FLY E135 User manual

E135 Service Manual Wingplus Communication LTD.
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E135 Service Manual
Ver. Edit Date Dept. Record Design/Check Approve
V1.1 2009-10-30 HW Wang Xiao Ming
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Content
1INTRODUCTION TO BLOCK DIAGRAM ................................................................................................ 3
2ENGINEERING MODEL........................................................................................................................... 4
3BLOCK DIAGRAM ................................................................................................................................... 5
4TECHNIQUE PARAMETER ..................................................................................................................... 6
5BASEBAND TROUBLE ........................................................................................................................... 9
5.1 Preparatory work for repair ........................................................ 9
5.2 Flash programming does not download .............................................. 9
5.3 Phone does not “power on” ....................................................... 10
5.4 Sound trouble ................................................................... 11
5.5 Can not charge up ............................................................... 12
5.6 LCD trouble .................................................................... 14
5.7 Keyboard not function .......................................................... 15
5.8 Microphone trouble .............................................................. 16
5.9 Earphone part trouble ............................................................ 17
5.10 USB transmit trouble ............................................................. 18
5.11 Vibrator trouble ................................................................. 19
5.12 Receiver does not work .......................................................... 20
5.13 Camera trouble ................................................................. 21
5.14 Bluetooth has not function ........................................................ 22
5.15 Motion sensor trouble ............................................................ 23
5.16 FM Trouble ..................................................................... 24
5.17 Light sensor trouble .............................................................. 25
5.18 Phone can not access SIM card ................................................... 26
5.19 TF CARD TROUBLE.....................................................................................................................27
6RF TROUBLE......................................................................................................................................... 29
6.1 Principle of operation ............................................................ 29
6.2 AGC failure ..................................................................... 30
6.3 AFC failure ..................................................................... 31
6.4 APC Failure .................................................................... 32
7MAINTENANCE TOOLS........................................................................................................................ 34
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1 Introduction to block diagram
■Logic Part
U201[CPU+PMU,MT6235BA]
MT6235 is a highly-integrated and extremely powerful single-chip solution for GSM/GPRS/EDGE
mobile phones. Based on the 32-bit ARM926EJ-STM RISC processor,MT6235’s superb processing
power, along with high bandwidth architecture and dedicated hardware support, provides an
unprecedented platform for high performance GPRS/EDGE Class 12 MODEM application.
G101 [VC-TCXO 26MHz]
Main Clock for Control Processor and RF Block, Subsystem
X201 [32.768 KHz Sleep Crystal]
32.768 KHz Clock for Sleep Mode Operation and RTC block.
UB00[TV,TLG1120]
Worldwide Free-to-Air Broadcast Reception
NTSC/PAL/SECAM support (48 - 862 MHz)
FM stereo radio support (76 – 108 MHz) Single-chip TV Receiver
RF tuner
Demodulator
Decoder
DSP and audio/video processing
Scaler
FM stereo radio Highest Performance with Mobility
Best-in class video sensitivity
Mobility support to 430 km/h Dynamic multi-path fading and Doppler compensation Large screen
support Fastest channel switching times
■RF Part
U103 [RF Transceiver MT6140AN]
MT6140 is a highly integrated RF transceiver IC for Global Systems for Mobile communication
(GSM850, GSM900),Digital Cellular communication Systems (DCS1800), and Personal
Communication Services (PCS1900) quad band cellular systems. It includes four LNA’s, two RF
quadrature mixers, a channel filter, a programmable gain amplifier for the receiver, two high precision
I/Q modulators for the quad band transmitter, on-chip regulators, and a fully programmable sigma-delta
fractional-N synthesizer with an on-chip LC-tank VCO. The MT6140 includes control circuits to
implement different operating modes.
U101 [PA RF3159]
High Gain for use in Systems with Low RF Driver Power
Linear EDGE and GSM Operation
PowerStar® GSM/GPRS Power Control
Digital Band Select Enables GSM850, EGSM900 or DCS, PCS Amplifier Lineup
Single Supply Voltage;Requires no External Reference Voltage
Automatic VBATT Tracking Circuit avoids Switching Transients at Low Supply Voltage
Low Power Mode for Reduced EDGE Current
Digital Bias Control for Simple Implementation of Low Power Mode
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2 Engineering model
■Automatic test mode command : *#88#
Test list as follows:
Test Station Flag Ver s ion BackLight Keypad
Bat t er yFMRadio Speaker
Receiver
Speaker/Vibrator/ T -Flash
FMRadio Handset Camera
LCD
Handset Bluetooth Report
■TV test mode command : *#867#
■Query software version command : *#8432#
■Separate test command : *#32*#
Ver s ion Resource BIN Echo loop Vibrator
ADCLCD contrast
Loud spk Ringtone
LCD Charger
Keypad
LED Heads et RTC
MTBF UART Mermory card Nand Flash FM Radio Camera Bluetooth
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3 Block Diagram
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4 Technique Parameter
Item Description Character
1 Frequency GSM
TX：880~915Mhz
RX: 925~960Mhz
DCS
TX：1710~1785Mhz
RX：1805~1880Mhz
PCS
TX：1850~1910Mhz
RX：1930MHz~1990MHz
2 Phase Error RMS<5° Peak<20°
3 RX sensitive EGSM/DCS1800 -104dB
4 TX POWER GSM 2W(33dBm) /DCS 1W(30dBm)
5 Frequency Error <0.1ppm
EGSM DCS/PCS
Level Power Range Level Power Range
5 33dBm ±2dBm 0 30dBm ±2dBm
6 31dBm ±3dBm 1 28dBm ±2dBm
7 29dBm ±2dBm 2 26dBm ±2dBm
8 27dBm ±2dBm 3 24dBm ±2dBm
9 25dBm ±2dBm 4 22dBm ±2dBm
10 23dBm ±2dBm 5 20dBm ±2dBm
11 21dBm ±2dBm 6 18dBm ±2dBm
12 19dBm ±2dBm 7 16dBm ±2dBm
13 17dBm ±2dBm 8 14dBm ±2dBm
14 15dBm ±3dBm 9 12dBm ±3dBm
15 13dBm ±3dBm 10 10dBm ±3dBm
16 11dBm ±5dBm 11 8dBm ±5dBm
17 9dBm ±5dBm 12 6dBm ±5dBm
18 7dBm ±5dBm 13 4dBm ±5dBm
6 POWER LEVEL
19 5dBm ±5dBm 14 2dBm ±5dBm
Carrier Wave offset(kHz) GSM (dBc) DCS/PCS (dBc)
100 ＋0.5 ＋0.5
200 －30 －30
300 －33 －33
400 －60 －60
600～1200 －60 －60
1200～1800 －60 －60
1800～3000 －63 －63
3000～6000 －65 －65
7 Spectrum due to
Modulation
6000 －71 －73
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Carrier Wave offset（kHz）GSM (dBm) DCS/PCS
(dBm)
400 －19 -22
600 －21 -24
1200 －21 -24
8 Spectrum due to
Switch
1800 －24 -27
9 BER EGSM/DCS1800
BER（II）<2%@－102dBm
11 RX Level Precision ±3dB
12 SLR 8±3dB
Fre.(Hz) MAX（dB）MIN (dB)
100 －12 /
200 0 /
300 0
－12
1000 0 －6
2000 4 －6
3000 4 －6
3400 4 －9
13 TX Response
4000 0 /
14 RLR 2±3dB
Fre.(Hz) MAX（dB）MIN(dB)
100 －12 /
200 0 /
300 2
－7
1000 * －5
2000 0
－5
3000 2
－5
3400 2
－10
4000 2
15 RX Response
16 STMR 13±5dB
TO ARL （dB）Grading ratio（dB）
－35 17.5
－30 22.5
－20 30.7
－10 33.3
0 33.7
7 31.7
17 Distortion
10 25.5
18 Side tone
distortion
3 rank distortion<10％
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;
19 Ring Volume At least 85dB in the following.
Incoming tel. alert and message alert are rings
When testing distance is 10cm.
20 Charge Current <700mA
Bar Number Power
5 －85dBm～－50dBm
4 －89dBm～－82dBm
3 －93dBm～－86dBm
2 －97dBm～－90dBm
1 －101dBm～－94dBm
21 Antenna display
0 －110dBm～－98dBm
Bar Voltage
0 3.62V
1 3.73V～3.62V
2 3.8V～3.73V
3 3.91V～3.8V
22 Battery status
4 3.91V～4.2V
23 Alarm Voltage 3.6±0.03V
24 Auto turn off
voltage
3.5±0.03V
25 Battery type Li.Battery
Standard Voltage＝3.7V
The top voltage＝4.2V
Capacity：850mAh
26 Charger AC mode charger
Import：100～240V，50Hz
Output：5V，600mA
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5 Baseband Trouble
5.1Preparatory work for repair
5.2 Flash programming does not download
Analysis Process ：
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Not Download
Check
current
Little or no current
YES
Check test point
voltage (UTX,URX
is 2.8V)
Slightly larger than normal
Current>300mA
VCORE （ 1.2V ）、
AVDD （ 2.8V ）、
VDD （ 2.8V ）、
VTCXO （ 2.8V ）、
VMEM( 1. 8V) 、
VREF ( 1. 5V)
Check voltage
whetheris normal,
reverse Resistance
whether is normal
，
whether there is short
circuit
Chec k VBAT
， VCHG
voltage
whether is
normal
， If
there is no
voltage,
c hec k w elding
of the system
I/O
YES
Check 26MHz
Check the
corresponding
signals in the
circuit-off
（ For
example:T212,T
213
）
NO
First check U109
whether there is
VCCRF output;
secondly,check
welding of the
U103
Not wave output
Dow nload is mainly c ommunic ations
between the CPU and FLASH
，
including the line of control, address lines
and data lines
。 If check external circuit
no problem
， CPU and FLASH w elding
no problem,the final issue may itself
access to the PCB,there are problems -
removed the CPU and FLASH, Trace of
the on-off
YES
VCHG
or VBAT
whether
short circuit
and GND
5.3 Phone does not “power on”
Power on principle of phone: When the power supply is connected with the phone, through internal
switching circuit in the boot it will form a trigger High-level, when press boot button long enough, the
boot high-level change to low-level because of connecting with GND, and the signal reaches PMU block,
PMU will activate the internal voltage regulator and output stable voltage, as a logical part of the core
CPU will gain power supply.
We know phone boot in three necessary conditions: Power Supply, clock and reset. Now power
supply has been provided, then Crystal will produce 26 MHz clock signal, on the one hand it will be
taken as a RF reference clock, on the other hand, it will be sent to logic to the clock signal. After the
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clock signal reaches the microprocessor, the memory before need be cleared, therefore PMU will send
reset signal to it for initialization. After the initialization is finished, it outputs control commands to
memory, then memory will change to permit state, and then through address line to look up where boot
program is, after finding the boot program it will be sent to CPU internal DSP circuit through data lines.
After the successful operation, the CPU output signal to PMU, the power supply will continuously output
voltage to complete booting.
After phone powers on, the CPU calls RF parameters from flash, through radio BCCH to receive
the signal intensity in the area, if your phone has a SIM card or UIM cards, Mobile phone will send the
information in SIM card to the BS, and receives information from the BS, thus achieve network
connections.
After being connected with networks, mobile phones will be in a idle mode, but also mobile phones
through SACCH periodically exchange some information with base stations, such as signal strength
and frequency synchronization, receiving level, and receiving quality
Analysis Process
：
Download ok ，
but no power on
Re-download YES
NO
Measure whether
there is 32KHz
signal output
YES
Check communications
between the CPU and
FLASH
Measure VRTC whether there is 2.8V
voltage output,or else re-welding or
change U201
NO
Communications between the CPU and
FLASH
，
including the line of control, address lines
and data lines
。 If check external circuit
no problem
， CPU adn FLASH welding no
problem,the final issue may itself access
to the PCB,there are problems - removed
the CPU and FLASH, T rac e of the on-off
NO
NO
END
Sortware porblem
5.4Sound trouble
Analysis Process ：
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Sound
trouble:Ring
tone/MP3
Check SPK
Check welding of
U511(Audio PA)
NO
NO
Re-welding or
change U511
END
YES
NO
Re-welding or change SPK
YES
Re-download
software
Check welding of the SPK
peripheral circuits
NO
Re-welding or
change U201(CPU)
Reference circuit as follows：
5.5Can not charge up
Charging principle introduce:
Regulate audio PA gain
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When the charger inserted, Charge for the PMU module provides voltage Charge，As long as the
PMU of the BATDET pin grounding can start charging module，at this time will result in a charge
interrupt signal to CPU，to inform the CPU has entered a state-of-charge now。PMIC will then generate
an interrupt to the CPU，CPU Started as follows module：
1. ADC sampling, mainly collected Vchrg, Vbat and the output from the MOSFET drain voltage Vbat
and the adoption of Vd (MOSFET drain) and Rsense value, you can calculate the charge current!
That is, we * # 32 * # in ADC display options Icharg, Vchrg, Vbat, and other information!
2. Send a message to the MMI layer, it shows that state-of-charge and some sample data
3. Testing battery voltage whether more than protection voltage and battery voltage connection is
correct，If there is any problem you can cut off the charging circuit through CHRCTRL!
Reference circuit as follows：
Analysis Process ：
PMU
U201
PMOS driver signal
Charge input signal
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Re-download
software
Measure VCHG
whether is 5V
Can not charge up
Check the battery
voltage is below 4.2 v
Check welding of P601 and
connect of the charger
Battery power saturation
Chec k w elding o f
MOSFET(D304)
Re-weding or change D304 and
U201
YES
YES
YES
NO
NO
NO
END
5.6LCD trouble
LCD backlight driver circuit:
Analysis Process ：
GPIO40_LCM_BL_EN Signal
By adjusting the waveform duty cycle to
achieve Adjust the brightness of the main
screen;
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LCD Trouble
No Blacklight No Display
Check
U802
NO
Re-download
software
Check LCD
module
Check FPC
w elding
Re-welding or
change
Change LCD
module
NO
NO
YES
YES
END
Re-welding or
change CPU
NO
Check EMI part
w elding of t he
E801,E802,E804,E80
5,E806
Re-welding or
change
NO
5.7
Keyboard not function
Analysis Process:
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Key not function
Check KB
board
Check part
R208,R209,R213
R214
Re-download
software
1.Re-assembly KB board
2.Check connector P603 whether shatter
3.Change KB board
Whether ins uf fic ient S older
Value w hether is 1KΩ
Re-welding or change CPU
END
YES
YES
YES
YES
NO
NO
NO
5.8Microphone trouble
Reference circuit as follows：
From to CPU
Provide positive
bias voltage for MIC
Provide negative
bias voltage for MIC
2.2v
0.3v
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Analysis Process ：
MIC not function
Check MIC
Check mic external
circuit
Re-download
software
1.Re-welding or change
2.Check PCB mic pad whether short-circuit
1.Check whether there is part miss
2.Check whether there is part unconnect solder
3.Measure signal in the circuit show
Re-welding or change CPU
END
YES
YES
YES
YES
NO
NO
NO
5.9 Earphone part trouble
1、Bias voltage：MICBIASP（2.2V）；
2、Headphone detection signal: HEAD_DET: When insert earphone, due to XMP3_R
connection with speaker，HEAD_DET signal grounding，Trigger interrupt to the CPU，Will show "Insert
headphone";
3、Headset to hang up signal detection：ADC5_HP_MIC：This signal is used to detect whether the
headphones of the hang up button Press，when the headset hang up button is pressed, XMICP signal
will be shorted, ADC5_HP_MIC will be shorted at one time;
Analysis Process ：
HEAD_DET
Not insert: low level
Insert: high level
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USB transmit trouble
Check USB
connct
1.To confirm the correct use of usb cable line
2.Check headset whether inserted in the end
YES
YES
NO
Check USB jack
Check PC driver
whether correct install
1.Check P601 PIN whether un-connect solder
2.Check P601 whether internal damag e
3.Change P601
Re-welding or change CPU
END
YES
YES
NO
NO
5.10 USB transmit trouble
Reference circuit as follows：
USB Circuit Working Principle：
1、Phone through the USB data line and computer connection, charge signal trigger phone auto power
on
2、External power supply (USB_PWR)connect to mobile phone, USB ADC signal voltage will be low to
the high jump, trigger bring interrupted signal;
URXD&UTXD:SW download、
Board Test、IMEI Write
UP Pull signal
USB data
transmit signal
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3、CPU implementation USB interrupt;
4、CPU and computer through the USB interface for data transfer；
Analysis Process ：
USB transmit trouble
Check USB
connct
1.To confirm the correct use of usb cable line
2.Check headset whether inserted in the end
YES
YES
NO
Check USB jack
Check PC driver
whether correct install
1.Check P601 PIN whether un-connect solder
2.Check P601 whether internal damage
3.Change P601
Re-welding or change CPU
END
YES
YES
NO
NO
5.11 Vibrator trouble
Reference circuit as follows：
Analysis Process
：
Interruption control signals(from cpu)
Vibrator Switches
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No vibration
Open vib,measure
VIBRAT ORw hether
there is low level
.Re-welding or change vibrator
YES
YES
NO
Re-download
software
Re-welding or change CPU
END
NO
5.12 Receiver does not work
Reference circuit as follows：
Analysis Process ：
C524, C527, C528, B508 and
B509 are for noise reduction
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