How to Repair iPhone 6S Volume Up Button

Received a iPhone 6S from one of our customers, according to his description, the iPhone 6S has volume up button function failure, when he press the volume up button, it’s unresponsive. Why this happens? How do we repair this problem? Let’s check in this article！

First of all, we prepare a WL Aluminum Alloy Pad for more efficient and safer operation, then disassemble the iPhone 6S with right opening tool kit, and remove off the motherboard.

Use Fluke 15B+ Digital Multimeter to measure the resistance of J4700_3#, it is normal. Put iPhone motherboard under the 3.5X-90X Stereo Zoom Microscope to check, we found the iPhone power IC was replaced by other phone repair man. Measure its voltage, it only has 0.5V, and the voltage of BUTTON_VOL_UP_CONN_L volume up button signal is pulled down.

Based on our repair experience, this failure is caused by damaged iPhone CPU, so replace the iPhone power IC is useless.

BUTTON_VOL_UP_L lower voltage, it has no external pull resistance, it is pulled directly through the CPU internal. Borrow PP3V0_TRISTARUSB controller 3V string the resistance of 1K, so that the voltage is pulled up to 1.6V.

Install the iPhone to test; now the iPhone volume up button is normal now.

Get more cell phone repair guide and related tools, please visit on www.vipfixhone.com