4. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
(1) Checking Crystal Circuit
TEST POINT
CIRCUIT
WAVEFORM
CHECKING FLOW
TP1(26 MHz)
OK?
No
Crystal is OK.
See next page to check PLL Circuit
Yes
Replace X101
TP1
TP1 (X101 1pin)
TP1
E3
D2
C1
A2
B2
B1
A5
A6
A3
A4
F2
F1
A8
A9
FMRIN
FMRINX
XO
XOX
RX12
RX12X
RX34
RX34X
TX1
TX2
FE1
FE2
PABS
X101
TSX-3225
26MHz
2
1
3
4
GND2
HOT2
HOT1
GND1
RF_LB_TX
RF_HB_RXN
RF_HB_RXP
RF_LB_RXN
RF_LB_RXP
RF_HB_TX
RF_VLOGIC
RF_2G_BS
TP1