LG KE520 Service Manual page 117

4. TROUBLE SHOOTING
4.22.1.4 Checking WLAN_SYSCLK
WLAN_SYSCLK
Check R506
is output 26MHz?
YES
Check BT RF OUT
V_TCXO
X500 TG-5010LH-87N
R506
1 3
NC OUT
0
2 4
GND VCC
26MHz
C506
1u
LGE Internal Use Only
NO
Check X500
Or Check U501
WLAN_SYSCLK
- 118 -
R506
X500
U501
<Fig. 4>
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Only for training and service purposes
26MHz