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E195 Service Menu

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

configu WIFI + ATV

3, Support NOKIA specification device: BL- 5C battery, MICRO 5PIN interface

D201

MSW8533N

CPU

D104

RF7163 ASM

D1056

SI4210

TRANPA

D301

H8ACS0PE0MBR-46

M-C

NAND+LPSDRAM

T-FLAHS-CART

LCM

摄像头

KEY

KEY_LED

RGB_LED

MOTR

B_LED

D608

ACRUX21

D605

MSB7602

WIFI+BT

AUDIO

SENSOR

Содержание E195

Страница 1: ...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...

Страница 2: ...wing 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 Supp...

Страница 3: ...E195 Service Menu 2...

Страница 4: ...E195 Service Menu 3 1 2 Distribution of the mainboard components...

Страница 5: ...E195 Service Menu 4...

Страница 6: ...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 modulat...

Страница 7: ...inally 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...

Страница 8: ...ope to observe the signal given in the above mentioned flow chart the specific signal waveforms shown as below Check IQ signal input pin of Transceiver whether there is IQ signal Check RF signal outpu...

Страница 9: ...E195 Service Menu 8 IQ signal waveforms of transceiver in transmit state 3 10 I Q RF interface spectrum analyzer is as follows GSM transmit signal...

Страница 10: ...E195 Service Menu 9 DCS transmit signal PA EN waveforms of PA in transmit state PA EN...

Страница 11: ...E195 Service Menu 10 PA BAND SW waveforms PA BAND SW GSM PA BAND SW DCS...

Страница 12: ...E195 Service Menu 11 PA Vramp waveforms Vramp pcl5 Vramp pcl 19...

Страница 13: ...ver whether there is any correct IQ signal output to CPU Y Check CPU MSW8533N N No Receive Check CPU Y N Are Transceiver SDATA SCLK LE RFVCOEN all correct Y Check CPU N Whether the voltage Transceiver...

Страница 14: ...Check whether Transceiver has correctly controlled the signal Check whether the voltage supply is normal if normal Transceiver can be judged of damaged N Check PA and the paths ahead Signal waveforms...

Страница 15: ...es the signal IQ signal output pin of Transceiver the state of receiving IQ signal Test should have 2 8v voltage The signal Transceiver received from CPU used to access the internal register of Transc...

Страница 16: ...E195 Service Menu 15 3W SDATA 3W SCLK...

Страница 17: ...ock can be measured by using the AC Coupling The RFCRTLCLK automatic frequency control from CPU to the crystal oscillator makes 26M crystal oscillator output accurate 26MHZ to Transceiver Crystal osci...

Страница 18: ...E195 Service Menu 17 VAFC TCXO output 26MHZ...

Страница 19: ...M 52 M operating clock Analog baseband contains MSW8533N analog baseband chip audio and baseband codec Three major functional blocks integrated internal Audio codec including Voice input Output chann...

Страница 20: ...E195 Service Menu 19 3 3 2 MIC loop Check basic bias voltage signal of MICBIASP and MICBIASN and the language signal of MIC itself when the MIC is good but no response of LOOP MIC in test...

Страница 21: ...one loop includes headset speaker and MIC two road signal Check the circuit access situation when there is something abnormal such as no sound in headset speaker MIC invalid etc after inserting the ea...

Страница 22: ...ooth WIFI circuit This phone hardware design is compatible with two bluetooth project 1 Through the WIFI BT two in one chip put WIFI and Bluetooth together to deal with 2 Use Bluetooth chip alone only...

Страница 23: ...E195 Service Menu 22 b WIFI BT receiving circuit c WIFI launch part d WIFI BT chip...

Страница 24: ...23 e single Bbluetooth chip circuits Power control single RF output difference RF antenna input clock input Bluetooth antenna single power part Bluetooth clock Bluetooth control Bluetooth Chip Selecti...

Страница 25: ...s by using AC coupled oscilloscope to track the signal flow if a certain period circuit of no signal it may be AC short circuit to ground or is caused by a short circuit and open circuit On checking t...

Страница 26: ...NO Connect the download line and observe the ammeter whether the current is high normal current is generally about 30mA Yes Quickly disconnect the connection and touch the chip gently to see if it is...

Страница 27: ...E195 Service Menu 26 3 7 3 LCM circuit analysis The signal waveform Chip select signals CS LCD control signal LCD data signal...

Страница 28: ...E195 Service Menu 27 Screen reset signal LRST Screen Write signal LWR...

Страница 29: ...E195 Service Menu 28 About the screen first find the problem whether is mainboard or screen by adopting replacement method then focus on checking the LCM CON welding...

Страница 30: ...onents whether it is of short circuit 4 4 Sound trouble E195 audio processes in internal CPU focus on checking the Audio PA on the issue of free or miscellaneous ring tones Low ring for checking its s...

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