: Before allowing high current to flow into the battery, the RVP circuit checks for shorts or surges.
: Power Positive. This indicates a power supply line carrying positive voltage, as opposed to a ground (GND) or a logic communication line.
This specific line is critical for the charging sequence in modern iPhones, including models like the Go to product viewer dialog for this item. iPhone 13 Pro Max Go to product viewer dialog for this item. Go to product viewer dialog for this item. pp-var-usb-rvp
: When you plug in a cable, the Yangtze (Charging IC) or Kraken (USB Controller) chips monitor this line to verify the power source Studocu .
: Because wireless charging bypasses the physical USB-RVP verification circuit, it often remains functional. Repair Wiki Diagnostic & Repair Steps : Before allowing high current to flow into
: You should find a reading between 3.7V and 5V . Any value above 0V proves the USB controller IC detected the cable and is actively trying to turn on the primary charging path. If it reads a flat 0V, the IC is dead or lacks its baseline power supply rails. Diagnostic Measurement Expected Value Interpretation Action Required RVP Resistor (Pad 1) Upstream USB power is functional. Proceed to check downstream. RVP Resistor (Pad 2) Resistor is intact and passing voltage. Check validation signals. RVP Resistor (Pad 2) 0V (Pad 1 is 5V) Open/Blown Resistor or downstream short. Replace 10-Ohm Resistor / Clear Short. Power Gate Enable Pin 3.7V - 5.0V USB IC is operational and validating cable. Trace faults closer to the main PMIC. 5. Professional Repair Tips
This feature introduces a runtime-detectable or compile-time flag that alters the behavior of the USB-C PD task. This specific line is critical for the charging
: On a functioning board, this line should typically measure approximately when a charger is connected. Verification Chain
: The USB-PD handshake fails. The issue likely lies with the USB transceiver IC ( Hydra / Kraken ) or corrupted CC lines. 5. Micro-Soldering Repair Strategies
: Micro-soldering a replacement 10Ω surface-mount resistor onto the board restores the power connection. 2. Short Circuit to Ground