Description
Reverberation Board Dual Power PT2399 High Performance Karaoke Reverb Board Digital Karaoke Mixer Amplifier
The circuit uses NE5532*2PT2399*1 architecture microphone and music volume controllable
Onboard 78127912 regulated power supply sound pure and natural
Debugging method
1. First weld the small parts, the chip is not welded, detailed inspection of each part of the location and pole
2. Test 1812 and 7912 output voltage plus or minus 12V, regulator tube 5V
3. Welding 5532 and T23399, the overall test
4. Recommended transformer dual AC 12-18V 10W