FLY E140 Service Manual
E140 Service Manual
E140 Service Manual
Ver. Edit Date Dept. Record Design/Check Approve
V1.1 2011-1-3 HW XiaoGongHai
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E140 Service Manual
Content
1 INTRODUCTION TO BLOCK DIAGRAM ................................................................................................ 3
2 ENGINEERING MODEL........................................................................................................................... 5
3 BLOCK DIAGRAM ................................................................................................................................... 6
4 TECHNIQUE PARAMETER..................................................................................................................... 7
5 BASEBAND TROUBLE ......................................................................................................................... 10
5.1 Preparatory work for repair......................................................................................................10
5.2
5.3 Phone does not “power on” .....................................................................................................11
5.4 Sound trouble .......................................................................................................................... 12
5.5 Can not charge up ...................................................................................................................13
5.6 LCD trouble.............................................................................................................................. 16
5.7 Keyboard not function..............................................................................................................16
5.8 Microphone trouble..................................................................................................................17
5.9 Earphone part trouble..............................................................................................................18
5.10 USB transmit trouble................................................................................................................19
5.11 Vibrator trouble........................................................................................................................ 21
5.12 Receiver does not work........................................................................................................... 21
5.13 Camera trouble........................................................................................................................23
5.14 Bluetooth has not function.......................................................................................................24
5.15 Phone can not access SIM card..............................................................................................24
5.16 TF card trouble ........................................................................................................................ 26
Flash programming does not download
............................................. 10
6 RF TROUBLE......................................................................................................................................... 28
6.1 Principle of operation
6.2 AGC failure
6.3 AFC failure
6.4 APC Failure
7 MAINTENANCE TOOLS........................................................................................................................ 32
..................................................................... 29
..................................................................... 30
.................................................................... 31
............................................................ 28
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E140 Service Manual
1 Introduction to block diagram
■ Logic Part
U200[MT6253]
MT6235 is Mediatek’s first monolithic GSM/GPRS handset chip solution which integrates RF,analong
baseband,digital baseband as well as Power Management Unit(PMU) and can greatly reduce the
component count and make smaller PCB size.Besides,MT6253 is capable of SAIC (single Antenna
Interference Cancellation) and AMR speech.Basde on 32 bit ARM7EJ-S RISC processor,MT6253
provides an unprecedented platform for high quality modem performance.
X100 [VC-TCXO 26MHz]
Main Clock for Control Processor and RF Block, Subsystem
X500 [32.768 KHz Sleep Crystal]
32.768 KHz Clock for Sleep Mode Operation and RTC block.
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
U100 [PA RPF88143]
■ Small package: 6.0 x7.0 mm_typ (1.0 mm maximum height) with integrated ANT SW.
■ Built-in closed loop APC circuit with power detector performs stable TRP (Total Radiated Power)
under load mismatch conditions.
■ Built-in Antenna Switch
■ High gain 3stage amplifier: 3dBm input typ.
■ Built-in ESD protection
■ Lead free soldering process available
■ GPRS Class 12 compatible
■ High efficiency:
Peak efficiency 45% Typ. for GSM850/900
Peak efficiency 40% Typ. for DCS1800/PCS1900
■ Compliant with China-ROHS
■ Distribution of the mainboard components
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E140 Service Manual
■ Elec introduction
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E140 Service Manual
2 Engineering model
■Automatic test mode command : *#88#
Test list as follows:
Test Station Flag Ver s ion BackLight Key pa d
LCD
Receiver
Sp eaker/Vib rator/ T-F lash
Handset Bluetooth Report
FMRadio Handset Camera
Ba tt e r yFMRadio Speaker
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E140 Service Manual
■Query software version command : *#9432#
■Separate test command : *#32*#
Ver s ion Resource BIN Echo loop Vibr at o r
LED Hea ds e t RTC
MTBF UART Mermory card Nand Flash FM Radio Camer a Bluetooth
LCD Charger
Key pa d
ADCLCD c ontrast
Loud spk Ringtone
3 Block Diagram
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E140 Service Manual
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
6 POWER LEVEL
7 Spectrum due to
Modulation
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
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
6000 －71 －73
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E140 Service Manual
8 Spectrum due to
Carrier Wave offset（kHz）
Switch
400
600
1200
1800
9 BER EGSM/DCS1800
BER（II）<2%@－102dBm
11 RX Level Precision ±3dB
12 SLR 8±3dB
13 TX Response
Fre.(Hz)
100
200 0 /
300 0
1000 0
2000 4
3000 4
3400 4
4000 0 /
14 RLR 2±3dB
15 RX Response
Fre.(Hz)
100
200 0 /
300 2
1000 *
2000 0
3000 2
3400 2
4000 2
16 STMR 13±5dB
17 Distortion
TO ARL （dB） Grading ratio（dB）
－35
－30
－20
－10
0 33.7
7 31.7
10 25.5
18 Side tone
3 rank distortion<10％
distortion
GSM (dBm) DCS/PCS
－19
－21
－21
－24
MAX（dB）
－12
MAX（dB）
－12
17.5
22.5
30.7
33.3
(dBm)
-22
-24
-24
-27
MIN (dB)
/
－12
－6
－6
－6
－9
MIN(dB)
/
－7
－5
－5
－5
－10
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E140 Service Manual
19 Ring Volume At least 85dB in the following.
20 Charge Current <700mA
21 Antenna display
22 Battery status
23 Alarm Voltage 3.6±0.03V
24 Auto turn off
voltage
25 Battery type Li.Battery
26 Charger AC mode charger
Incoming tel. alert and message alert are rings
When testing distance is 10cm.
Bar Number Power
5
4
3
2
1
0
Bar Voltage
0 3.62V
1
2
3
4
3.5±0.03V
Standard Voltage＝3.7V
The top voltage＝4.2V
Capacity：850mAh
Import：100～240V，50Hz
Output：5V，600mA
－85dBm～－50dBm
－89dBm～－82dBm
－93dBm～－86dBm
－97dBm～－90dBm
－101dBm～－94dBm
－110dBm～－98dBm
3.73V～3.62V
3.8V～3.73V
3.91V～3.8V
3.91V～4.2V
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E140 Service Manual
5 Baseband Trouble
5.1 Preparatory work for repair
5.2 Flash programming does not download
Analysis Process：
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