Usb Trouble Shooting - LG -P970 Service Manual

4.11 USB Trouble shooting

The sequence of LGP970USB is,
USB connected to LGP970
USB work
Block Diagram of USB & UART connection is shown below
UART_RX_SW
UART_TX_SW
U2
LGE Internal Use Only
USB_OUT_5V goes to 5V(FPCB)
USB_DM_TWL
8
USB_DP_TWL
U705 UART_RX
UART_TX
- 143 -
4. TROUBLE SHOOTING
USB_D+ go to 3.3V USB_DATA is triggered
USB_ID
USB_DM
USB_DP
CN904
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USB_ID
USB_DM
USB_DP
CN1001