@smartphone_xpert: Think you know every PCB test point? 🤔 Can you explain TXD, RXD, VBAT, VCHR, DP, DM, GND, and the rest without checking Google? 😅 Save this infographic—you'll thank yourself during your next repair! 🔥 Follow for more phone repair tips. #phonerepair #pcb #electronics #technician #smartphonexpert