Hi,
I have a Rotel 990BX Power amplifier that I think has a bad relay:
With the preamp on and music playing, when you switch the Rotel:
*ON* - Right speaker comes on immediately, then after a 3-counts, the protection light goes off and Left speaker comes on.
*OFF* - Protection light and Left speaker go off immediately - Right speaker trails off like when you lose a radio station driving through the sparser parts of New Mexico.
The protection/relay is supposed to mute both speakers on power up so there is no "pop", also it mutes them on power down - I think its just not working for the right side
I took it by a local electronics repair place and after plugging it in and turning it on, they said that it was obviously something major since they could hear the relay/protection circuit engage and disengage, therefore something was shorted and dangerous DC voltage was going to fry my speakers. I did thank him and offered to pay him for his advice but he refused. Could he be right though?
Rotel 990BX relay
Thanks!
- Sam
I have a Rotel 990BX Power amplifier that I think has a bad relay:
With the preamp on and music playing, when you switch the Rotel:
*ON* - Right speaker comes on immediately, then after a 3-counts, the protection light goes off and Left speaker comes on.
*OFF* - Protection light and Left speaker go off immediately - Right speaker trails off like when you lose a radio station driving through the sparser parts of New Mexico.
The protection/relay is supposed to mute both speakers on power up so there is no "pop", also it mutes them on power down - I think its just not working for the right side
I took it by a local electronics repair place and after plugging it in and turning it on, they said that it was obviously something major since they could hear the relay/protection circuit engage and disengage, therefore something was shorted and dangerous DC voltage was going to fry my speakers. I did thank him and offered to pay him for his advice but he refused. Could he be right though?
Rotel 990BX relay
Thanks!
- Sam
Well, I replaced the relay and it still had the same problem!
After a few hours of trying to figure out what it could be I noticed that the stripe on one of the 3-wire internal cables leading to the relay pcb wasn't going to the dot marking on the connecter, it was reversed.
Of course it worked perfectly after I flipped it around...lol
Ah well, at least I know the relay is fresh!
Thanks again for your help,
-Sam
After a few hours of trying to figure out what it could be I noticed that the stripe on one of the 3-wire internal cables leading to the relay pcb wasn't going to the dot marking on the connecter, it was reversed.
Of course it worked perfectly after I flipped it around...lol
Ah well, at least I know the relay is fresh!
Thanks again for your help,
-Sam
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