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DS 110 Service Menu

Version number: V1.0

Draft

Ren Mingwei

Auditing

Xilin

Authorize Zhao Gang
Date 2010-6-18

Shenzhen IFLY Communication Technology Co., Ltd.

Содержание DS 110

Страница 1: ...DS 110 Service Menu Version number V1 0 Draft Ren Mingwei Auditing Li Xilin Authorize ZhaoGang Date 2010 6 18 Shenzhen IFLY Communication Technology Co Ltd...

Страница 2: ...Audio Frequency 16 3 5 Baseband common malfunction 17 4 Reference for maintenance 21 4 1 No Signal 21 4 2 Phone does not power on 21 4 3 LCD trouble 21 4 4 Sound trouble 21 4 5 Keyboard malfunction 21...

Страница 3: ...110 1 1 About DS 110 Phone DS 110 mainboard is based on the MTK platform designed to support dual band which supporting the FM the mainboard system consists of the base band CPUMT6223D EN71PL03280 70C...

Страница 4: ...DS 110 Service menu 1 2 Distribution of the mainboard components 2...

Страница 5: ...ransmit TX is composed of the modulation loop power amplifier and antenna switch PLL is mainly in the internal AD6548 I Q signal first enters into the AD6548 after entering the PLL the signal is modul...

Страница 6: ...switch or matching network CheckTransceiver whethe there is any RF output signal Y VBAT PA_EN N BANDSW_DCS V APC are they OK Check Transceiver Y External N Y Replace PA Check CPU Replace Transceiver...

Страница 7: ...DS 110 Service menu IQ signal waveforms of transceiver in transmit state IQ RF interface spectrum analyzer is as follows GSM transmit signal 5...

Страница 8: ...DS 110 Service menu DCS transmit signal PA EN waveforms of PA in transmit state PA EN 6...

Страница 9: ...DS 110 Service menu PA BAND SW waveforms PA BAND SW GSM PA BAND SW DCS 7...

Страница 10: ...DS 110 Service menu PA Vramp waveforms Vramp pcl5 Vramp pcl 19 8...

Страница 11: ...X filter N Check the corresponding power supply and circuits of 26MHZ Y Replace Check Transceiver External RC components Transceiver 2 4 4 The maintenance process of Receive malfunction Maintenance pr...

Страница 12: ...mal if normal Transceiver can be judged of damaged N Check PA and the paths ahead Signal waveforms refer to the following Output signal of Signal generator Input GSM CH62 channel receives the signal D...

Страница 13: ...put pin of Transceiver the state of receiving IQ signal The signal Transceiver received from CPU used to access the internal register of Transceiver The corresponding waveform is as follows IQ Signal...

Страница 14: ...DS 110 Service menu 3W SDATA 3W SCLK 12...

Страница 15: ...enu 3W LE 26M clock can be measured by using the ACCoupling The AFC automatic frequency control from CPU to the crystal oscillator makes crystal oscillator output accurate 26MHZ to Transceiver 26M Out...

Страница 16: ...DS 110 Service menu VAFC TCXO output 26MHZ 14...

Страница 17: ...Interface 26M 52M operation clock Analog baseband contains UMT6223D analog baseband chip audio baseband codec and power management Four major functional blocks integrated internal Audio codec includi...

Страница 18: ...aseband chip that is UMT6223D starts to run and roll polling its ROWX pin pitch up its PWRONIN pin then you can release the boot key This is the initial boot process 3 4 Audio Frequency The sound qual...

Страница 19: ...onding First check whether the serial port of PC and cell phone is unrestricted if not it is caused by being lack of devices or empty solder of power manager USB con and peripheral resistance Measure...

Страница 20: ...d Eliminate any reasons for not download except the cell phone Yes Check whether it is the problems of allocation of procedure download cable power supply software PC phone Check whether the 5pin conn...

Страница 21: ...DS 110 Service menu 3 5 3The signal waveform Chip select signals CS Screen reset signal LRST 19...

Страница 22: ...DS 110 Service menu Screen Write signal LWR About the screen first find the problem whether is mainboard or screen by adopting replacement method then focus on checking the LCM CON welding 20...

Страница 23: ...display interface and nearby resistance row as if it is still abnormal check the pad whether it is of short circuit 4 4 Sound trouble DS 110 audio processes in internal CPU focus on checking the Audi...

Страница 24: ...tools Operation Manual Reference _MTK_ 5 3 write SN Operation Manual Reference _MTK_ 5 4 Calibration Operation Manual Reference _MTK_ 5 5 Testing Operation Manual Reference _MTK_ 5 6 Function testing...