LG KE520 Service Manual page 61

4. TROUBLE SHOOTING
4.3.1.3 Checking SYS_CLK_REQ
Checking SYS_CLK_REQ
Check R507 High
YES
Check WLAN_SYSCLK
SYS_CLK_REQ
LGE Internal Use Only
NO
Check
WiFi+BT Module
VBAT V_TCXO
U501 R1114D281D-TR-F
1 3
VDD VOUT
4 2
NC GND1
6 5
CE GND2 C505
1u
C507
1u
- 62 -
R507
<Fig. 3>
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1.28s