Checking Flow
SETTING : Connect the battery and the charging adaptor (TA) to the phone
START
Voltage at +V_CHAR
of D402 = 4.8V?
YES
NO
The charging adaptor (TA) is out of order.
Change the charging adaptor.
Voltage at C309 = 4.8V?
Voltage at +VPWR
of C326 = 4.2V?
YES
NO
Replace U402, D403
YES
NO
Replace PMIC [ U302 ]
YES
The logic level at CHG_MODE
of Q401 = Low?
NO
Replace Q401
YES
Is the battery
charged
NO
1.
Check the Battery contact pin [ CON401 ]
2.
The battery may have the problem
Change the battery and try again.
Charging will operate properly
YES
Summary of Contents for PX8700
Page 40: ...PX8700 LG Electronics Inc 40 Circuit Diagram ...
Page 45: ...PX8700 LG Electronics Inc 45 Circuit ...
Page 51: ...PX8700 LG Electronics Inc 51 Circuit Diagram ...
Page 56: ...PX8700 LG Electronics Inc 56 Circuit ...
Page 62: ...PX8700 LG Electronics Inc 62 Circuit Diagram RFT6150 PMIC 2 9V_TX 2 6V_MSMP2 circuit ...
Page 70: ...PX8700 LG Electronics Inc 70 RF_IN Graph 4 2 1 6 RF_OUT Circuit Diagram Waveform ...
Page 84: ...PX8700 LG Electronics Inc 84 Graph 4 2 2 5 RF_OUT RF_IN Waveform Circuit Diagram ...
Page 90: ...4 3 1 2 Charging Trouble Circuit Diagram Test Points V_BATT Pin1 CON401 U402 ...
Page 98: ...4 3 4 2 Receiver Trouble Test Points Circuit Diagram R314 U305 R315 C338 ...
Page 100: ...4 3 4 4 Headset Trouble Circuit Diagram Test Points CON402 R405 R416 R415 C116 C115 ...
Page 103: ...4 3 4 3 Mic Trouble Circuit Diagram Test Points R126 M101 ...
Page 110: ...4 3 6 3 USB Interface Circuit Diagram U201 MSM6550 U302 Test Points R307 X202 R306 L302 C314 ...
Page 128: ......
Page 130: ...MSM6550 P N MSM6550 R N U201 No Booting Memory P N HYG0UGG0MF1P 5SH0E R N U304 No Booting ...
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Page 139: ...DCN Tx DCN Rx PCS Tx PCS Rx ...
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Page 147: ...D 1 Accessories 0 1 1 14 0 11 4 1 2 2 1 1 11 4 31 11 1 1 0 1 1 ...