LG KT520 Service Manual page 28

3.1.4 RF Interface
A. Asta Interface
DB3150 controls GSM RF part using these signals through GSM RF chip-RF3000.
• RF_DATA_A
• RF_DATA_B
• RF_DATA_C
• RF_DATA_STRB
RF_DATA_A
RF_DATA_B
RF_DATA_C
RF_DATA_STRB
B. WCDMA Radio Link Interface
• RF_WCDMA_PA_0_EN
• RF_WCDMA_PA_1_EN
• RF_WCDMA_DCDC_EN
• RF_WCDMA_PWRDET_EN
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Y4
AA2
Y3
Y2
Figure 3-1- 5. Schematic of GSM RF Interface
Y4
RF_DATA_A
AA2
RF_DATA_B
Y3
RF_DATA_C
Y2
RF_DATA_STRB
AB8
RF_WCDMA_PA_0_EN
V7
RF_WCDMA_PA_1_EN
AB5
RF_WCDMA_DCDC_EN
AB6
RF_WCDMA_PWRDET_EN
Y10
ADC_I_NEG
W10
ADC_I_POS
W9
ADC_Q_NEG
Y9
ADC_Q_POS
Y8
DAC_I_NEG
W8
DAC_I_POS
W7
DAC_Q_NEG
Y7
DAC_Q_POS
AB7
TX_POW
Figure 3-1-6. Schematic of WCDMA RF Interface
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3. TECHNICAL BRIEF
QDATA_AMP_MSB
IDATA_FREQ_MSB
AMP_LSB_FREQ_LSB
DCLK_DATSTR
QDATA_AMP_MSB
IDATA_FREQ_MSB
AMP_LSB_FREQ_LSB
DCLK_DATSTR
WTX_BAND_1_EN
WDCDC_EN
WPOW_DET_EN
WRX_I_N
WRX_I_P
WRX_Q_N
WRX_Q_P
WTX_I_N
WTX_I_P
WTX_Q_N
WTX_Q_P
WPOW_DET
LGE Internal Use Only