FLY E195 Service Manual
E195 Service Menu
Version number: V1.0
Contents
1 OVERVIEW E195..........................................................................................................................1
1.1 ABOUT E195 PHONE.................................................................................................................1
1.2 DISTRIBUTION OF THE MAINBOARD COMPONENTS ....................................................................3
2 RF....................................................................................................................................................5
2.1 RF OVERVIEW..........................................................................................................................5
2.2 TRANSMIT ................................................................................................................................5
2.3 RECEIVE ...................................................................................................................................6
2.4 COMMON RF MALFUNCTION....................................................................................................7
3 BASEBAND..................................................................................................................................18
3.1 BASEBAND OVERVIEW ...........................................................................................................18
3.2 LOGIC.....................................................................................................................................18
3.3 AUDIO FREQUENCY................................................................................................................18
3.4 BLUETOOTH WIFI CIRCUIT.....................................................................................................21
3.5 DUAL SIM – DUAL STANDBY SINGLE PHONE .........................................................................24
3.6 ATV CIRCUIT..........................................................................................................................24
3.7 BASEBAND COMMON MALFUNCTION ......................................................................................24
4 REFERENCE FOR MAINTENANCE......................................................................................29
4.1 NO SIGNAL .............................................................................................................................29
4.2 PHONE DOES NOT “POWER ON”...............................................................................................29
4.3 LCD TROUBLE........................................................................................................................29
4.4 SOUND TROUBLE ....................................................................................................................29
4.5 KEYBOARD MALFUNCTION .....................................................................................................29
4.6 CAMERA WITH FLOWERY/BLANK SCREEN...............................................................................29
E195 Service Menu
1 Overview E195
1.1 About E195 Phone
E195 mainboard is based on the MSTAR platform, which is supporting GSM/GPRS：
900/1800/850/1900MHz GPRS three-frequency communication. It is Dual SIM – Dual
Standby Single the mobile phone. The phone has the following feature:
1, Three specialties: 3.5 HVGA (resolution 320 * 480) LCM, 5M camera, ultrathin 10.9 MM
2, Dual SIM – Dual Standby Single PDA, compatible with three configurations: basic
configuration + WIFI + ATV
3, Support NOKIA specification device: BL- 5C battery, MICRO 5PIN interface
D104
RF7163 ASM
D301
H8ACS0PE0MBR-46
M-C
NAND+LPSDRAM
T-FLAHS-CART
D605
MSB7602
WIFI+BT
D1056
SI4210
TRANSCEIVER+PA
D201
MSW8533N
CPU
D608
ACRUX21
BT
LCM
摄像头
KEY
KEY_LED
RGB_LED
MOTR
B_LED
AUDIO
SENSOR
1
E195 Service Menu
2
E195 Service Menu
1.2 Distribution of the mainboard components
3
E195 Service Menu
4
E195 Service Menu
2 RF
2.1 RF Overview
RF part mainly consists of transceiver AERO4210HN (adopts program of near-zero IF
receiver, supporting the EGSM / DCS and 26M VCTCXO as the clock input, integrated
clock buffer, LO VCO and TX VCO and regulator, only need for external connections of
VBAT / AVDD.
GSM RF and BB interface diagram
Transceiver (AERO4210HN) with the RF modulation and demodulation functions contains
IF frequency synthesizer and VCO RF, which is part of the core component of the RF. PA
has a major role in amplification of modulation signal, and it must be controllable and the
speed should meet the GSM agreement.
Baseband Chip
2.2 Transmit
TX is composed of the modulation loop, power amplifier and antenna switch. PLL is
mainly in the internal AERO4210HN, I / Q signal first enters into the AERO4210HN. After
entering the PLL the signal is modulated to RF, and then it outputs from the chip to PA,
converts into electromagnetic energy through antenna by the antenna switch after
enlarged.
PA:
This part adopts voltage control to achieve and its role is to amplify the signal power in
accordance with the requirements. It is divided to different power levels through VRAMP
signal. The transmit signal of GSM is 5 to 19, power is from 3.2MW to 2W while DCS is 0
~ 15, power from 1MW ~ 1W. PA is time-sharing work controlled by TX-EN chip, the output
power of P A is controlled by VRAMP (APC) through the voltage. PA is intermittent work, by
the BS to achieve the choice of frequency bands.
5
E195 Service Menu
匹配网
匹配网
路径
路径
频段选择信号
BB
AMS
Host RF Launch Principle Diagram
Transceiver
RF 发射输出
RF Launch output
2.3 Receive
Accessed from the antenna, GSM signal arrives at AERO4210HNN through the front end
SAW filter; and it converts to I/Q signal which modulated in 100 KHZ carrier. Then, it goes
through the band-pass, getting amplification (gain controllable), filtering, amplifier (gain
controlled); and mixes to baseband signal 4-road I/Q. Finally, it outputs to CPU for
processing after filtering. In diagram, SDATA, SCLK are I2C serial signals, responsible for
the communication work between MSW8533N and AERO4210HN; LE is MSW8533N
enable signal of AERO4210HN; RFVCOEN is enable signal which can generate
frequency mixing vibration signal VCO; VAFC is automatic frequency control signal of
crystal oscillator.
ANT
Coaxial Switch
同轴开关及
&Antenna
matching circuit
天线匹配电
PA
Transceiver
GSM TX
GSM TX Path
DCS TX Path
DCS TX
MT6129
IQ
MT6225
I2C
Band selection signals
6
Host RF Receive Principle Diagram
E195 Service Menu
Check IQ si
g
p
p
2.4 Common RF Malfunction
2.4.1 Detection and Maintenance Flow Chart of MS Transmit
malfunction
(No transmit) Connect PC and cell
hone with maintenance of line, use the
Repair software making mobile phone
access to transmit state.
Y
Check antenna switch
or matching network
Y
pin of Transceiver,
whether there is IQ
si
nal?
gnal input
Y
Check RF signal output
pin, whether there is
any RF signal?
Y
VBAT, PA_EN,
BANDSW_DCS,
VAPC, are they OK?
N
Check CPU
N
Check Transceiver,
whether there is any
RF out
ut signal?
N
Check
Transceiver
External RC
Replace PA
N
Check CPU
Y
Replace
Transceiver
2.4.2 The maintenance process of Transmit malfunction
Use the Repair software and make mobile phone access to transmit state. Choose 62CH
in GSM band, POWER Level for 5, DCS for 700CH, POWER Level for 0. Then, first
observe whether the current rises, and use the spectrum analyzer and oscilloscope to
observe the signal given in the above-mentioned flow chart, the specific signal waveforms
shown as below:
7
E195 Service Menu
IQ signal waveforms of transceiver in transmit state:
3.10 I/Q
RF interface spectrum analyzer is as follows:
GSM transmit signal
8
Loading...