PX8700
LG Electronics Inc.
- 66 -
Checking Flow
NO
Start
Check U102 Pin23
CELL_OUT
Refer to Graph4.2.1.4 (A)
Similar?
RFT Circuit is OK
See next page
YES
Check U102 I/Q Data
Pin27. 28, 29, 30
Refer to Graph4.2.1.4 (B)
Check U102 PWR
(+2.6V_MSMP2
+2.9V_TX)
NO
Check PMIC Circuit
Check U102 Pin1
(TX_ON Signal)
≥
2.5
NO
Check TX_ON
Signal Line &MSM
Check U102 Pin15
TCXO
Refer to Graph4.2.1.4(C)
Similar?
NO
Check TCXO Circuit
Check U102 Pin2, 3,4
SBCK0
SBDT0
SBST0
Refer to Graph4.2.1.4 (D)
YES
Similar
?
Replace U102
Check SBI Signal
LINE&MSM
Similar?
OK
NO
Check U201 MSM
NO
YES
YES
YES
+2.6V_MSMP2 PIN 32
+2.9V_TX PIN: 6,9,13,14,17,19,20,
22,24,25,31
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 ...
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Страница 130: ...MSM6550 P N MSM6550 R N U201 No Booting Memory P N HYG0UGG0MF1P 5SH0E R N U304 No Booting ...
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Страница 139: ...DCN Tx DCN Rx PCS Tx PCS Rx ...
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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 ...