Usb Trouble - LG KP330 Service Manual

4.17 USB trouble

USB Initial sequence of KP330 is :
USB connected to KP330
USB_D+(VA604) go to 3.3V
18PIN MMI Connector
USB_D+
USB_D-
USB_D+ is about to 3.3V?
Change the Main board
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Only for training and service purposes
USB_VBUS(D600) go to 5V
USB_DATA is triggered
PM6658
Start
Cable is inserted ?
YES
D600 is 5V ?
YES
YES
4. Trouble Shooting
USB work
USB_DAT
USB_DAT
USB_OE_N
USB_OE_N
USB_SE0
USB_SE0
USB_D+
USB_D-
NO
Insert cable
NO
Check CN600 15th Pin
NO
Check U602
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4. TROUBLE SHOOTING
MSM6260
LGE Internal Use Only