3020e, NAD amp schematic/advice please

[zen]

Hi all This amp has distorted audio via RIGHT channel.

[zen]

Re: 3020e, NAD amp schematic/advice please

I ran an input via CD/AUX plus Tuner, & then signal via tape out to another amp.

Both channels crystal clear.

Not sure what this proves, except possibly part of the pre-amp working.

[zen]

Re: 3020e, NAD amp schematic/advice please

Very strange, after I tested again RIGHT channel fine.

Took a chance & checked all the electrolytic caps, replacing a few mildly suspect ones, plus reflowing many solder joints on the main board.

Also cleaned all switches & controls.

Now working on test.

Wish me luck

[UNITRAX]

Re: 3020e, NAD amp schematic/advice please

Bad connections on the soldering pads are common to most Nad and Proton devices. A recap would be a good idea.

[randmental]

Re: 3020e, NAD amp schematic/advice please

I have a Proton AM455 Pro - I noticed it has numerous small value electrolytic capacitors (1uF - 10uF 50V for example.

Would it not better to recap these with non-electrolytic same value that are now available, especially those in the signal path?

[SMDFlea]

Re: 3020e, NAD amp schematic/advice please

I have a Proton AM455 Pro - I noticed it has numerous small value electrolytic capacitors (1uF - 10uF 50V for example.

Would it not better to recap these with non-electrolytic same value that are now available, especially those in the signal path?

Off topic, please start your own thread.

.