TCLT728 ServiceManual
TCLMobileCommunication CO., Ltd
3 页共32 页
Contents:
Precautions forRepair Work.....................4
Chapter1 Introduction ...............................6
1.1 Layout.................................................................................................................................6
1.2 Introduction.........................................................................................................................6
Chapter2Assembleand disassemble..............7
2.1 Schematicprocess ofdisassembly......................................................................................7
2.2 Theprocess ofassembly...................................................................................................16
Chapter3LogicPart...........................17
3.1 PMICMT6305.................................................................................................................17
3.2 CPUMT6205Bdescription..............................................................................................18
3.3 PowerON Control............................................................................................................18
3.4 ChargeCircuit...................................................................................................................20
3.5 Backlightcircuit forLCD................................................................................................20
3.6 Motorcircuit.....................................................................................................................20
3.7 AudioPart.........................................................................................................................20
3.8 LCDdisplayingcircuit......................................................................................................21
3.9 SIMCardcircuit...............................................................................................................21
Chapter4RF Part..............................22
4.1 RXPart.............................................................................................................................23
4.2 TXPart..............................................................................................................................24
4.3 PowerAmplifier................................................................................................................24
Chapter5ToolsandFAQ........................25
5.1 Tools..................................................................................................................................25
5.2 NoPowerOn....................................................................................................................25
5.3 NoDisplay........................................................................................................................26
5.4 Nobacklight......................................................................................................................27
5.5 NO transmitting................................................................................................................29
5.6 Noring tone......................................................................................................................30
5.7 Novibration......................................................................................................................30
5.8 NoNetwork......................................................................................................................31
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