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Summary of Contents for texet X-Navi
- Page 1 TEXET X-Navi Smartphone Service Manual (This document is only for reference) CONTENTS • Specifications • Safty Precautions • Product Function • Block Diagrams • Chart of Troubleshooting • PCB Diagrams • SCH Diagrams...
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Page 2: Safety Precautions
Specification General Specification GSM850 EGSM900 DCS1800 PCS1900 WCDMA1900 WCDMA850 1850~1910 824~849 Freq.Band[MHz] 824-894MHz 880-960MHz 1710-1880MH 1850-1990MH 1930~1990 869~894 Uplink/Downlink ARFCN range 128~251 0~124 & 512~885 512~810 9262-9538 4132-4357 9662~9938 4357~4458 975~1023 Tx/Rx spacing 45MHz 45 MHz 95 MHz 90MHz 80 MHz 45 MHz Modulation 0.3GMSK... -
Page 3: Product Function
● Remove static electricity remained your body before you touch semiconductor or parts with semiconductor. There are ways that you touch an earthed place or wear static electricity prevention string on wrist. ● Use earthed soldering steel when you connect or disconnect ESD. ●... - Page 4 Block Diagrams...
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Page 5: Chart Of Troubleshooting
Chart of Troubleshooting 1、Base band 1.1、Cannot download Cannot download (No DA Process) Check the connection between Download Cable and handset. Connect again and check whether it is OK or not. Check the USB connector and try change the USB connector. Check the power supply and the output of U301 Change U301 or Re-welding it Check the X600 output of U600... - Page 6 1.2、Cannot power-on Cannot power-on Check if it can be power on after re-downloading (Follow 1.1) Check the Battery connector and the on/off switch Check the power supply and the output of U301 Change or Re-welding U301 Check the X600 output of U600 Change U600 or Re-welding it Check the 32.768 crystal output of crystal Change or Re-welding U101...
- Page 7 1.4、No vibration Setting right and check Motor Change or re-welding U301 Check VIBR_PMU_OUT signal from U301 1.5、The abnormality of the side-key operation Abnormality of side-key Check side-key Check U101 Change or re-welding it 1.6、The abnormality of speech Abnormality of speech Receiver no sound MIC not working Earphone no working...
- Page 8 1.7、Camera problem Camera problem Check or change Camera, check J840 and the Components around it. Check VCAMA_PMU, VCAMD_PMU, VCAM_IOPMU, Re-welding or change U301 VCAM AFPMU from U301 Check and try to change or re-welding U101 1.8、LCD display problem LCD no display (have backlight, white screen) LCD no display (have no Backlight, black screen) Check or change LCD and check CON804...
- Page 9 1.10、CTP(Touch Panel) failure CTP failure Check or try to change CTP, check TP_1.8V and TP_2.8V power supply from U301, check CON880 and components around it. Re-welding or change U301 Check or try to re-welding or change U201 1.11、SIM card failure SIM failure Check VSIM1_PMU and VSIM2_PMU power supply from U301 Re-welding or change U301...
- Page 10 1.13、BT/WIFI problem BT/WIFI Failure Check antenna contact withANT1003 and ANT1004. Check U1000 and the components around it Re-welding or change them 1.14、GPS problem GPS Failure check antenna contact withANT1003 and ANT1004 Check U1006 and the components around it Re-welding or change it Check U1000 and the components around it Re-welding or change them 1.15、FM problem...
- Page 11 2、RF parts 2.1、2G RX failure 2G Dual band RX failure check the antenna contact with shrapnel try to Re-welding Check all control signals of Check the RX output signal change U701 U701: PAEN, BANDSW, and from Z600 MODE_PA Re-welding or change Z600 Check U600 and the components around it.
- Page 12 3G TX failure Check U701 and the components around it Re-welding or change U701 Check U602,U604 and the components around them Re-welding or change them Check U706,U709 and the components around them Re-welding or change them Check U600 and the components around it Re-welding or change U600 Re-welding or change U101...
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