Usb Trouble Shooting - LG -V909DW Service Manual

4.11 USB Trouble shooting

The sequence of LGV909DW USB is,
4.11 USB Trouble shooting
USB connected to LGV909DW
The sequence of LGV909DW USB is,
triggered USB work. Block Diagram of USB & UART connection is shown below
USB connected to LGV909DW
triggered USB work. Block Diagram of USB & UART connection is shown below
USB device mode Trouble shooting diagram
USB device mode Trouble shooting diagram
LGE Internal Use Only
USB_OUT_5V(C1208) goes to 5V
USB_OUT_5V(C1208) goes to 5V
- 86 -
4. TROUBLE SHOOTING
USB_D+ go to 3.3V
USB_D+ go to 3.3V
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Only for training and service purposes
USB_DATA is
USB_DATA is