LG D686 - Usb

3. TROUBLE SHOOTING
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Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3.7 USB
START
Check the Connection
of uUSB
Main PCB & Sub FPCB Connection OK?
Yes
Connection OK?
Is the signal ok for USB+ & - ?
Yes
Yes
Change I/O connector( SUB FPCB CN10000)
No
Check Connector( SUB FPCB CN10001)
Change Sub FPCB
No
No
Change the Main PCB
END
CN10000
11
10
9
5
4
3
2
1
8
7
6
GND
CN1001
1615
1714
1813
1912
2011
2110
229
238
247
256
265
274
283
292
301
VCHG_OVP_IN
LED_R
LED_G
LED_B
MIC_N
USB_ID
USB_DN
USB_DP
SPK_LP
VMIC
MIC_P
KROW1_F
KCOL1_F
SPK_LN
SPK_RN
SPK_RP