samsung galaxy a30s charging ways flex jumper

samsung A30s charging problem solution

Whether the phone is not charging at all, charges slowly, or connects only when pressure is applied, the underlying cause is often related to the charging lines, sub-board circuits, or motherboard charging pathways.

🔧 Samsung Galaxy A30s (A307FN) Charging Problem – Complete Solution & Jumper Ways Guide

This comprehensive repair guide covers everything you need to diagnose and fix the problem, including the jumper solution used when one or more charging tracks are damaged.

📌 Why the Samsung A30s Stops Charging

Charging faults in the A30s typically originate from:

• Damaged USB-C port
• Broken lines on the sub-board
• Defective interconnect (flex) cable
• Charging IC or PMIC issues
• Broken or burnt tracks on the motherboard

Because the phone uses a dual-board structure (sub-board + mainboard), damage to any part of the charging chain can interrupt the power supply.

🛠️ Samsung A30s Charging Problem Solution – Step-By-Step Diagnostics

To locate the fault accurately, follow these essential diagnostic stages:

🔍 1. Examine the USB-C Charging Port

Start with a full inspection:

• Look for liquid residues or corrosion
• Check if pins are bent or loose
• Clean the port and test with a known-good charger
• Shake test: if charging cuts in/out, the port may be loose

If damaged, replace the charging port/sub-board.

🔍 2. Test the Charging Sub-Board (Daughterboard)

The A307FN sub-board includes:

• USB-C charging port
• Charging filters
• Mic components
• First-stage voltage pathways

Use a multimeter to verify:

1. 5V VBUS input
2. Charging track continuity
3. No shorts or burnt components

If readings are normal, proceed to the flex cable.

🔍 3. Check the Interconnect Flex Cable

This cable connects the sub-board with the motherboard. Common issues include:

• Broken internal lines
• Oxidation on connectors
• Weak continuity or intermittent contact

If the cable fails continuity testing, replace it immediately.
If the cable is good, move to the mainboard.

🔍 4. Diagnose the Mainboard Charging Circuit

When all previous components are functional, the issue is most likely on the mainboard:

• Charging IC (PMIC)
• Power management lines
• Charging tracks between the connector and IC

If one of these tracks is broken, the phone will not receive the required power, and the jumper ways solution becomes necessary.

🔌 Samsung A30s Charging Ways – Jumper Solution (A307FN)

If continuity tests reveal a broken charging track between the sub-board connector and the charging IC on the motherboard, you can restore the line using a jumper wire.

⚙️ Required Tools:

• Ultra-thin copper wire
• Fine-tip soldering iron
• Flux paste
• Microscope (recommended)
• Multimeter

⚡ How the Jumper Fix Works:

You connect a jumper wire between:

• The charging output point on the sub-board connector → to →
• The corresponding charging input pad on the motherboard

This bypasses the damaged track and restores power flow.

Problems fixed by the jumper method:

• No charging at all
• Charging only when pressing the cable
• Slow or unstable charging
• Charging stops randomly
• “Charging paused” warnings

Always keep the jumper as short and neat as possible to avoid interference or shorts.

⚠️ Safety Warning – Important Before Attempting This Repair

Working directly on the motherboard involves serious risk. Improper handling can cause:

• Overheating and damaging the charging IC
• Burning solder pads beyond repair
• Short circuits leading to dead phone
• Permanent motherboard failure

This guide is meant for trained technicians only.
Beginners should not attempt jumper repairs without proper knowledge and tools.

🎥 Video Guide Section

Add your instructional video here, covering:

1. Full teardown of the Samsung A30s
2. Testing the charging lines
3. Locating correct jumper points
4. Final charging test after repair

💦also read

The Samsung A30s (A307FN) charging problem is rarely caused by the charger itself. The real issue is commonly linked to a defective USB-C port, faulty flex cable, or a broken charging track on the motherboard. By following the diagnostic steps and applying the correct charging ways jumper solution, the device can be fully restored without replacing the entire motherboard.