LG KE520 Service Manual page 62

4.3.1.4 Checking WLAN_SYSCLK
WLAN_SYSCLK
Check R506
is output 26MHz?
YES
Check BT RF OUT
V_TCXO
X500 TG-5010LH-87N
1 3
NC OUT
2 4
GND VCC
26MHz
C506
1u
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Only for training and service purposes
NO
Check X500
Or Check U501
R506
WLAN_SYSCLK
0
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4. TROUBLE SHOOTING
R506
X500
U501
<Fig. 4>
LGE Internal Use Only
26MHz