X249 L3 Service Manual
4
1-2. Product Main Function .................................................................. 7
1-3. General Specification .................................................................... 7
2-1. System Diagrams ........................................................................... 8
2-1-1 BBIC Diagrams .......................................................... 9
2-2. Power Management Diagrams .................................................... 11
3-1-1. Phone does not start up troubleshooting ................ 12
3-1-2. SIM troubleshooting................................................ 14
3-1-3T-Flash troubleshooting ............................................ 17
3-1-4. MIC troubleshooting ............................................... 16
3-1-5. Speaker troubleshooting ......................................... 18
3-1-6. Earpiece troubleshooting ........................................ 21
3-1-7. Vibra troubleshooting .............................................. 23
3-1-8. Camera troubleshooting ......................................... 25
3-1-9. FM radio troubleshooting ........................................ 26
3-1-10. Display troubleshooting ........................................ 28
3-1-11. Bluetooth troubleshooting ..................................... 30
3-1-12. Keyboard troubleshooting ..................................... 31
3-1-13. Charge troubleshooting ........................................ 33
3-2-1.GSM/DCS RX troubleshooting ................................ 35
Summary of Contents for X249
Page 10: ...X249 L3 Service Manual 2 1 1 BBIC Diagrams Application Diagram of MT6260 ...
Page 11: ...X249 L3 Service Manual 2 2 Power Management Diagrams ...
Page 16: ...X249 L3 Service Manual SIM CIRCUIT T Flash circuit m BBIC SIM1 rom BBIC T card From BBIC SIM2 ...
Page 18: ...X249 L3 Service Manual MIC circuit To BBIC From MIC ...
Page 19: ...X249 L3 Service Manual 3 1 5 Speaker troubleshooting Speaker circuit FROM BBIC To Speaker ...
Page 20: ...X249 L3 Service Manual Troubleshooting flow chart Main related component BBIC U201 SPEAKER ...
Page 22: ...X249 L3 Service Manual Earpiece circuit To earpiece FROM BBIC ...
Page 24: ...X249 L3 Service Manual Vibra circuit To VIB ...
Page 26: ...X249 L3 Service Manual Camera circuit From BBIC ...
Page 28: ...X249 L3 Service Manual FM Circuit From earphone HEADGND ANT IN ...
Page 30: ...X249 L3 Service Manual Display Circuit ...
Page 32: ...X249 L3 Service Manual 3 1 12 Side health Troubleshooting Keyboard circuit ...
Page 35: ...X249 L3 Service Manual Battery charge circuit Charge control Charge 5V in ...
Page 38: ...X249 L3 Service Manual RF Circuit RF PA circuit TX RX ...
Page 39: ...X249 L3 Service Manual 4 Main Element Specifications 4 1 Baseband part 4 1 1 BBIC U201 ...
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Page 47: ...X249 L3 Service Manual 4 2 RF part 4 2 1 RF PA U102 ...
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Page 50: ...X249 L3 Service Manual 6 Glossary ...
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