Wi-Fi Trouble Shooting - LG KE520 Service Manual

4.22 Wi-Fi Trouble Shooting

Set BT Test mode ON
Check Wi-Fi Antenna Status
(Refer to figure 1)
Check 1.8V from ABB
Check VBAT from Battery
(Refer to figure 2)
Check SYS_CLK_REQ
(Refer to figure 3)
Check WLAN_SYSCLK(26MHz)
Check BT RF OUT
(Refer to figure 5)
Re-Download S/W
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Only for training and service purposes
start
In Engineering mode(2945#*#)
1.WiFi
On/Off (PowerLevel : AWAKE)
Test (Press Key1 : Tx Continue
YES
NO
YES
NO
YES
NO
YES
NO
(Refer to figure 4)
YES
NO
NO
Replace Wi-Fi + BT
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4. TROUBLE SHOOTING
→
→
9.Rx Tx Test 1.Test Mode
→
Replace Wi-Fi Antenna
Check ABB(U103)
Check Battery
Check Wi-Fi + BT Module
Check X500 or U501
NO
Check DBB(U104)
& SDIO Signal
Module
3. Tx
LGE Internal Use Only