[riveraudio]

Originally Posted by Mark D. Zacharias

Tim Schwartz wrote:
wrote:
Just purchased a NAD 7100 receiver and must say its a great sounding
piece, very smooth and natural sounding but I have noticed a slight
problem with the speakers connected to "A" vs "B".

A set of speakers connected to "A" wont come on (no sound at all)
when the receiver is first turned on unless the volume control is
turned up to about ten o'clock and then all of the sudden it will
kick in and stays working fine at any level.

Speaker connection "B" works just fine so I have been using "B" for
now.

Im using 8 ohm speakers with the setting at 8 ohms in the back of the
receiver.

Is this a typical issue with these receivers?

Advice appreciated, thanks.

Gil


Gil,

The relays in this unit are a common problem. They do both protection
and speaker switching, one for speaker A and one for speaker B. A
good choice for replacement is the Omron G2R-24-DC24 available from
Digikey (www.digikey.com their part number Z748-ND) or Mouser
(www.mouser.com, their part number 653-G2R-24-DC24) and I'm sure
other vendors, and are not that expensive. This Omron relay is a
sealed type and less likely to go bad again. It has 2 extra pins
that you will have to cut off before installing it. Which 2 pins are
obvious when you compare it to the old relay.

Unfortunately, getting to the relays to change them is a pain. they
are just in-board of the main power transformer and you can see them
from the top, but the connections are covered over by the plate that
mounts the main transformer. I take a lot of the unit apart so that I
can slide the main transformer mounting plate out of the way and get
to the relays. DON'T BE CHEAP - CHANGE BOTH RELAYS (E601 and E602)
at the same time so you don't have to deal with it again for many
years. Of course you could just used the speaker B connections,
until that relay starts to go bad.


Regards,
Tim Schwartz
Bristol Electronics

And I had previously wrote:

"The relay feeds both A and B speaker switches..."

I'm going to defer to Tim on this one - he works on lots more NAD's than I
do and would be the resident NAD expert in these parts.


Mark Z.

Hello,
Newbie here,
I too have a 7100 that just stopped working at all. I used to have issues with one channel, and now both on both A + B. I just got some relays. I need some solder wick before I attempt this. I am a little unsure where to unsolder. Can you guys tell me how many pins there are and if they are in any pattern, say two on each end of the relay?
Thanks
RiverAudio