LG KC780 Service Manual page 95

5. TROUBLE SHOOTING
5.12.3 DCXO circuit
TP
LGE Internal Use Only
DCXO Circuit
Is the waveform of
TP(X100) similar to Fig5?
YES
DCXO is OK.
See next part.
Fig 4 Debugging flowchart of DCXO circuit
X101
NX3225SA
4
3
GND2 HOT2
1 GND1 2
HOT1
26MHz
SIM_IO
SIM_CLK
SIM_RST
Fig 5 DCXO circuit (X100)
- 96 -
NO
Replace X100
TP
G19
RPWRON
TP109 U4
W7
W8
V10
U9
V9
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Only for training and service purposes
CLKOUT0
REFR
XOX
XO
CC_IO
CC_CLK
CC_RST