Glossary

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ADB — Android Debug Bridge, a command-line tool for communicating with Android devices.

Activation Lock — Apple’s anti-theft lock tying a device to the owner’s Apple Account.

BGA — Ball-grid array, a chip package with solder balls underneath.

Boardview — A file showing the physical layout of a circuit board and its nets.

BMBE — Barangay Micro Business Enterprise (RA 9178).

BTB connector — Board-to-board press-fit connector.

Buck converter — A switching regulator that steps voltage down.

CC line — Configuration Channel in USB-C, used for orientation detection and PD negotiation.

DFU — Device Firmware Update mode (Apple).

Diode mode — Multimeter mode measuring the voltage drop across a junction; used for comparative board diagnosis.

EC — Embedded controller, the always-on microcontroller in laptops.

EDL — Qualcomm Emergency Download mode.

EOPT Act — Ease of Paying Taxes Act (RA 11976).

ESD — Electrostatic discharge.

FRP — Factory Reset Protection (Android).

IMEI — International Mobile Equipment Identity.

Injection — Feeding current-limited voltage into a shorted rail to locate the faulty component by heat.

MLCC — Multilayer ceramic capacitor.

MOSFET — Metal-oxide-semiconductor field-effect transistor, an electronic switch.

OCA — Optically clear adhesive used to laminate phone glass to displays.

PD — USB Power Delivery.

PG / PGOOD — Power-good signal indicating a regulator’s output is stable.

PMIC — Power-management integrated circuit.

POST — Power-on self-test.

Rail — A power line carrying a specific voltage.

Repair Assistant — Apple’s on-device tool that configures new and used genuine parts.

S.M.A.R.T. — Self-Monitoring, Analysis and Reporting Technology for drives.

SoC — System-on-chip.

SRE — Service and Repair Enterprise (DTI accreditation category).

Thermal runaway — Self-sustaining overheating of a lithium cell.

True Tone — Apple’s display white-balance feature that depends on display calibration data.

VBAT — The battery voltage rail.

ZIF connector — Zero-insertion-force connector with a locking flap.

Sources checked for time-sensitive facts (November 2026): Apple Support — iPhone repair manual introduction and Repair Assistant documentation; MacRumors and AppleInsider coverage of Repair Assistant, parts pairing and the Genuine Parts Distributor programme; iFixit and associated coverage of the iPhone 17 Pro, iPhone Air and iPhone 17e teardowns; DTI Fair Trade Enforcement Bureau and DTI consumer-protection pages on SRE accreditation (PD 1572, RA 7394); PwC, Grant Thornton and KPMG Philippines summaries of RA 11976 and RR 7-2024; Globe, PayMongo and Triple i Consulting business-registration guides. Laws, fees and manufacturer programmes change — verify before acting.