0767: Riparazione Amplificatore NAD 3130

🎁 JLCPCB PCBA from $0 (Free Setup, Free Stencil): https://jlcpcb.com/cyt 💳 Channel Support 🔴 Patreon:   / pieraisa   🔵 PayPal: [email protected] 🟢 Online Shop https://teespring.com/stores/pier-aisa 📣 Forum: https://www.pieraisa.it/forum/ 🎬 Full Video List https://www.pieraisa.it/videolist 📌 Free Download Area: https://www.pieraisa.it/download 📺 Website: https://www.pieraisa.it/ ✉ Email: [email protected] I received a NAD 3130 amplifier from Pietro R. of Florence. One channel is not working and one is. It distorts a lot. Before the repair video, I unbox an item I received from Mac Gyver, which is very useful for repairs because it is the "engineered" version of the light bulb, which is connected in series with the power supply to limit the current in the event of a short circuit. ⏰ Index: 0:00 Prologue and Theme 0:52 Introduction 2:40 Unboxing the Light Bulb Protection Circuit 4:25 Description of the Anomaly 5:30 Opening and Analysis of the Schematic 7:13 Service Manual 8:48 Final Checks 10:49 Inserting Limiting Resistors 11:00 Reforming Capacitors 13:15 Smoking Resistor 16:31 Measuring DC Output Voltage 18:40 Analysis: Left Channel Off 24:00 Complete Replacement of the Power Amplifiers 26:00 Balanced Stage! 26:22 Reinstalling the fuses 27:20 Calibrating the DC offset of the left and right channels 28:00 Replacing the trimmer and pre-amp resistors 28:30 Alignment procedure, adjusting the bias current 30:00 Power test on 4 ohms of the right channel 32:30 Power test on 4 ohms of the left channel 34:00 Poor audio quality test 34:20 Conclusions #repairs #electronics #amplifiers #hifi #lab #tools #oscilloscopes #tutorials #projects #tv #audio #pieraisa