PX8700
LG Electronics Inc.
- 69 -
U108
PIN11 RF OUT
PIN2 RF IN
PIN1 VREF CELL
PIN3 PA_R1
PIN4 VCC
U108
PIN11 RF OUT
PIN2 RF IN
PIN1 VREF CELL
PIN3 PA_R1
PIN4 VCC
START
Similar ?
Check U108 Pin 2,11
RF IN/RF OUT
Refer to Graph 4.2.12
PAM Circuit OK.
See next page.
YES
Check U108 Pin4
≥ 3.8V ?
Check VCC Line
NO
Check U108 Pin2
NO
YES
≥ 2.7V ?
Check +2.9V_TX Line.
And PA_ON.
YES
Check U108 Pin3
≤ 1.8V ?
Check PA_R1 Signal line
NO
Replace U108
NO
YES
START
Similar ?
Check U108 Pin 2,11
RF IN/RF OUT
Refer to Graph 4.2.12
PAM Circuit OK.
See next page.
YES
Check U108 Pin4
≥ 3.8V ?
Check VCC Line
NO
Check U108 Pin2
NO
YES
≥ 2.7V ?
Check +2.9V_TX Line.
And PA_ON.
YES
Check U108 Pin3
≤ 1.8V ?
Check PA_R1 Signal line
NO
Replace U108
NO
YES
4.2.1.6. Check DCN PAM Circuit
Test Point
Checking Flow
Содержание PX8700
Страница 40: ...PX8700 LG Electronics Inc 40 Circuit Diagram ...
Страница 42: ...PX8700 LG Electronics Inc 42 Circuit Diagram Waveform SBCK0 SBCK0 SBST0 SBDT0 Graph 4 1 1 c Graph 4 1 1 d ...
Страница 44: ...PX8700 LG Electronics Inc 44 Waveform Graph 4 1 1 e Graph 4 1 1 f U103 Pin U104 Pin DP101 Pin 3 Graph 4 1 1 g ...
Страница 45: ...PX8700 LG Electronics Inc 45 Circuit ...
Страница 47: ...PX8700 LG Electronics Inc 47 Graph 4 1 1 i Graph 4 1 1 h RX0_QP RX0_IP RX0_IM Circuit Waveform RX0_QM ...
Страница 51: ...PX8700 LG Electronics Inc 51 Circuit Diagram ...
Страница 53: ...PX8700 LG Electronics Inc 53 Circuit Diagram Waveform SBCK0 SBCK0 SBST0 SBDT0 Graph 4 1 2 c Graph 4 1 2 d ...
Страница 55: ...PX8700 LG Electronics Inc 55 Waveform Graph 4 1 2 e Graph 4 1 2 f U103 Pin U104 Pin Graph 4 1 2 g DP101 Pin ...
Страница 56: ...PX8700 LG Electronics Inc 56 Circuit ...
Страница 58: ...PX8700 LG Electronics Inc 58 Graph 4 1 2 i Graph 4 1 2 h RX0_QP RX0_IP RX0_IM Circuit Waveform RX0_QM ...
Страница 62: ...PX8700 LG Electronics Inc 62 Circuit Diagram RFT6150 PMIC 2 9V_TX 2 6V_MSMP2 circuit ...
Страница 70: ...PX8700 LG Electronics Inc 70 RF_IN Graph 4 2 1 6 RF_OUT Circuit Diagram Waveform ...
Страница 84: ...PX8700 LG Electronics Inc 84 Graph 4 2 2 5 RF_OUT RF_IN Waveform Circuit Diagram ...
Страница 90: ...4 3 1 2 Charging Trouble Circuit Diagram Test Points V_BATT Pin1 CON401 U402 ...
Страница 96: ...4 3 4 Audio 4 3 4 1 Speaker Trouble Test Points Circuit Diagram C113 U106 R144 U103 C112 C110 L103 ...
Страница 98: ...4 3 4 2 Receiver Trouble Test Points Circuit Diagram R314 U305 R315 C338 ...
Страница 100: ...4 3 4 4 Headset Trouble Circuit Diagram Test Points CON402 R405 R416 R415 C116 C115 ...
Страница 103: ...4 3 4 3 Mic Trouble Circuit Diagram Test Points R126 M101 ...
Страница 108: ...4 3 6 2 Micro SD Detect Circuit Diagram PMIC Test Points CON105 C140 C141 C138 C136 C313 C142 C139 C137 U302 ...
Страница 110: ...4 3 6 3 USB Interface Circuit Diagram U201 MSM6550 U302 Test Points R307 X202 R306 L302 C314 ...
Страница 128: ......
Страница 130: ...MSM6550 P N MSM6550 R N U201 No Booting Memory P N HYG0UGG0MF1P 5SH0E R N U304 No Booting ...
Страница 133: ......
Страница 134: ......
Страница 135: ......
Страница 136: ......
Страница 137: ......
Страница 138: ......
Страница 139: ...DCN Tx DCN Rx PCS Tx PCS Rx ...
Страница 140: ......
Страница 141: ......
Страница 142: ......
Страница 143: ......
Страница 144: ......
Страница 145: ......
Страница 146: ......
Страница 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 ...