NAD 1240 Preamplifier Repair And Restoration
This NAD 1240 solid state preamplifier has no audio output. As with any restoration, first trying cleaning the controls to fix issues.
The top cover is removed so that we can get to the controls for cleaning. I use deoxit but there are many good products to use.
The problem with this NAD 1240 was fixed by cleaning the input selector switch (silver and rectangle shape) shown below,
Also clean the back panel RCA jacks, ground connectors, etc. Hopefully this NAD 1240 will not need attention again for many years.
This NAD 1240 repair and restoration is complete. A nice product from the late 80's with a good phone section.