Pp-var-usb-rvp -

) and measuring voltage on both sides can confirm if power is passing through to the Tigris charging IC. IC Replacement

: For a technician, this line is a common "villain." When an iPhone won't charge or turn on, they use a Docktest tool to check the health of the USB circuit. If they find a low resistance or a "short to ground" on the PP_VAR_USB_RVP line, they know they have to perform surgery—often involving a Reballing procedure where they remove the Yangtze chip, clean the tiny solder balls, and put it back. pp-var-usb-rvp