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

LCM

摄像头

KEY KEY_LED RGB_LED

MOTR B_LED

AUDIO

SENSOR

E195 Service Menu

1.2 Distribution of the mainboard components

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.

E195 Service Menu

匹配网

路径

频段选择信号

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

Transceiver

GSM TX

GSM TX Path

DCS TX Path

DCS TX

MT6129

MT6225

I2C

Band selection signals

Host RF Receive Principle Diagram

E195 Service Menu

Check IQ si

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.

Check antenna switch or matching network

pin of Transceiver, whether there is IQ si

nal?

gnal input

Check RF signal output pin, whether there is any RF signal?

VBAT, PA_EN, BANDSW_DCS, VAPC, are they OK?

Check CPU

Check Transceiver, whether there is any RF out

ut signal?

Check Transceiver External RC

Replace PA

Check CPU

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:

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

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