Repair assistant
A calm fault-finding checklist.
Use this as a structured repair guide for low-voltage electronics, speakers, small audio gear, and learning circuits.
Safety first, always.
ElectroLab AI teaches theory, low-voltage electronics, and planning concepts. Mains voltage, switchboards, fixed wiring, high-current systems, and legal electrical work must only be performed by licensed electricians where required.
Open Safety CenterProbe path
Trace from source to load.
Signal Tracer helps practise where to probe next when a stage goes missing.
Pick the symptom
First move
No power
Measure voltage at the source, then measure again after the switch or fuse.
Battery or adapter voltage
Switch and fuse continuity
Reverse polarity protection
Input connector damage
Measurement order
1.Voltage present at source
2.Voltage present after switch or fuse
3.Ground continuity
4.Expected regulator output
5.Signal reaches input stage
6.Output changes when input changes
Stop here if
Mains voltage, switchboards, fixed wiring, and high-current systems belong with licensed electricians where required.
If a fuse blows repeatedly, stop replacing it and find the cause.
If a lithium battery is swollen, hot, punctured, or smells unusual, isolate it safely and do not charge it.
If you cannot identify the power source or stored-energy parts, pause before probing.