Infinix Smart 8 Pro Sub Board & Charging Strip Original Diagram USB Charging Circuit Pinout & Repair

Описание: 📱 Infinix Smart 8 Pro Charging Strip & Sub Board Original Diagram Guide

In this video you’ll learn the original Infinix Smart 8 Pro charging strip and sub board diagram with full USB charging circuit pinout explanation for board‑level repair. This tutorial helps mobile repair technicians and hardware learners understand how the USB charging path works (VBUS, GND, D+, D–) and how to use the diagram for diagnosing and fixing charging issues.

Topics covered:
✔ Charging strip / sub board layout
✔ USB port pinout (VBUS +5V, GND, D+, D–)
✔ Fuse & diode locations on board
✔ Charging voltage path
✔ Multimeter test points & jumper logic
✔ Hardware troubleshooting steps

Fixes covered:
✔ No charging / charger not detected
✔ Fake or slow charging
✔ Loose USB port / sub‑board damage

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Note: Official exploded parts diagrams show the sub PCB (charging/flex) exists, but detailed electric schematics require schematic/boardview files (paid sources).
device.report

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🛠️ 30 Step‑by‑Step Professional Repair Guide

Confirm charging problem

Test original charger & cable

Power off phone

Open back cover carefully

Disconnect battery

Locate charging sub board

Identify USB‑C connector pins

Mark VBUS (+5V) line

Mark GND connection

Mark D+/D– data lines

Check charging fuse continuity

Inspect sub board diodes

Inspect EMI filters

Test VBUS at USB pads

Use boardview test points (paid)

Trace charging path to PMIC

Test continuity along tracks

Apply jumper if track damaged

Repair broken pad/traces

Re‑solder USB port if loose

Clean corrosion around port

Reconnect connectors

Reconnect battery

Insert charger

Observe charging icon

Measure charging current

Test slow/fast charging modes

Test data connection

Reassemble device fully

Confirm stable charging

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