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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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Содержание X-Navi

Страница 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...

Страница 2: ...disassemble this product otherwise screw will be worn away Use a thicken twisted wire when you measure level A thicken twisted wire has low resistance therefore error of measurement is few Repair aft...

Страница 3: ...set up ESD on product Because most of ESD are packed by box and aluminum plate to have conductive power they are prevented from static electricity You must maintain electric contact between ESD and pl...

Страница 4: ...Block Diagrams...

Страница 5: ...101 or Re welding it Check the welding Both U101 and U402 Change or Re welding them Cannot download Have DA Process But have no RB or FR or DL process Check the connection between Download Cable and h...

Страница 6: ...t of U600 Change U600 or Re welding it Check the 32 768 crystal output of crystal Change or Re welding U101 Check the welding U101or U402 Change or Re welding them 1 3 No Ring Setting rightly and Chec...

Страница 7: ...key Check side key Check U101 Change or re welding it End 1 6 The abnormality of speech Abnormality of speech Receiver no sound MIC not working Earphone no working Check receiver and the Check MIC an...

Страница 8: ...LCD no display have backlight white screen LCD no display have no Backlight black screen Check or change LCD and check CON804 Check or change LCD check U801 and the Components around it Check and try...

Страница 9: ...change U201 OK 1 11 SIM card failure SIM failure Check VSIM1_PMU and VSIM2_PMU power supply from U301 Re welding or change U301 Check SIM1 or SIM2 and the components around it Re welding or change the...

Страница 10: ...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 th...

Страница 11: ...U701 PAEN BANDSW and from Z600 MODE_PA Re welding or change Z600 Check U600 and the components around it Check or try to change U600 and U101 End 2 2 2G TX failure 2G TX failure check the antenna cont...

Страница 12: ...ing 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 aroun...

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