Preamplifier · NAD · 3020

Diagnosis: Blows Fuse

The unit blows a fuse or trips a breaker.

Safe first checks

  1. Unplug the unit immediately.
  2. Use only the exact fuse type and rating specified by the manufacturer.
  3. Never install a larger fuse, foil, or any bypass.
  4. Do not power it on repeatedly; repeated attempts can cause further damage.

Next step

This fault needs qualified bench diagnosis before the unit is powered again.