The method of checking the daily problems of dc stabilized voltage supply
1. Unstable voltage and current
The potentiometer has bad contact
2. Voltage out of control
The power tube is broken, or the potentiometer is open, or the IC is broken
3. The voltage cannot be regulated
The relay is out of order
4.LED displays lack of strokes
Fake welding of digital tube
5. No load
The relay is broken or faked welded
6. No electricity
The fuse blew out or the switch broke
7. No voltage
Power tube open circuit, or relay open circuit
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