LG LG-D855 - Checking XO Block

3. TROUBLE SHOOTING
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TP1
U1500
DNIC1543
TOL=0.01
R1516 4.75K
C1541 1n
30
29
32
33
50
91
37
71
105
95
109
131
123
104
141
127
DAC_REF
GND64
GP_DATA1
GP_DATA0
XO_IN
ADC_IN
SSBI_PRX_DRX
SSBI_TX_GNSS
RTUNE
DNC
PRX_LB_CA_OUT
PRX_MB_CA_IN
PRX_HB_CA_OUT
DRX_LB_CA_OUT
DRX_MB_CA_IN
DRX_HB_CA_OUT
WTR0_XO_IN
WTR0_GPDATA_1
WTR0_GPDATA_0
WTR0_SSBI_TX_GNSS
WTR0_SSBI_PRX_DRX
WTR0_DAC_IREF
TP1
3.1 Checking XO Block
The output frequency(19.2MHz) of XO(X4100) is used as the reference one of WTR1605L and PM8941 internal VCO