Nx Audio Rx 4000 Circuit Diagram May 2026

When you finally obtain a high-resolution scan of the PCB layout (often labeled "RX-4000 Rev 2.1" or similar), follow this practical repair workflow:

Diagnosis: The power supply is working, but the audio signal is cut. nx audio rx 4000 circuit diagram

Schematic Solution:

This is the most complex part of the NX Audio RX 4000 circuit diagram. When you finally obtain a high-resolution scan of

Critical Check: The diagram will show a "snubber circuit" (resistor + capacitor in series) across the transformer primary. If this burns out, the power supply fails. Critical Check: The diagram will show a "snubber

| Test point | Expected (AC mains version) | Car version (SMPS) | |--------------------------------|-----------------------------|--------------------| | Main rails (after rectifier) | ±45V to ±70V | ±35V to ±55V | | Op-amp supply pins (e.g., NE5532 pin 4 & 8) | -15V / +15V | -15V / +15V | | Output transistor bias (Vbe) | 0.5–0.6V | same | | Speaker terminal DC offset | < ±50mV | < ±50mV |