Drop out of left channel, Adcom GFA5802

Hello Curtis, comment that teams accompany the Adcom, to know where the signal arrives at the entrances of the GFA6000, I ask you this, to make a map of your sound system and try to find the possible place of failure
Try the left and right speakers, in the outputs that work, it can be the Surround, to check that they are working
I await your comment
Greetings Franco Dosil


Hola Curtis, comenta que equipos acompa?an al Adcom, para saber de donde llega la se?al a las entradas del GFA6000, te pido esto, para hacer un mapa de tu sistema de sonido y tratar de encontrar el posible lugar de falla
Prueba los parlantes izquierdo y derecho, en las salidas que funcionen, puede ser las de Surround, para comprobar que est?n funcionando
Espero tu comentario
Saludos Franco Dosil

Are your grounds to BARE metal sounds like a ground loop issue.

THE AMP HAS 4 FUSES INSIDE, 2 PER CHANNEL. YOU NEED TO CHECK THESE FUSES. BE CAREFULL, HIGH VOLTAGE- UNPLUG POWER CORD AND LET THE AMP STAY FOR COUPLE HOURS. REPLACE ONLY WITH PROPER VALUE FUSES 5AMP. IF BLOWN AGAIN, NO MORE ATTEMPT TO REPLACE - YOU NEED TO SEND IT TO REPAIR FACILITY LIKE THIS

no reason why not, 3 channel amps used to be the "state of the art" back in the early stereo days. the third channel was produced from the sum of the right and left channels, (the plus side of the right and the plus side of the left were sent to the center channel. produced what was considered at the time a true reproduction of the sound as it was intended to be. your lucky to have this old amp.

Hi...

I've contacted ADCOM before and they sent a pdf of the electricals

http://www.adcom.com/default.aspx

also try:

www.stereomanuals.com

Hi Allister...

Check for fuses and make sure that the speakers are solidly connected at both ends

I can suggest a repair place if needed

Can I assume that you have input signals going to both channels and that you have SWITCHED the cables to make sure that both cables going to the power amp are actually sending signals to it?
That will rule out any cable / pre-amp problems.
After you have done that test, let me know.

Hi am gathering that when it is bypassed (tone) its fine which suggests that the problem is on the treble/bass pots or boards. Try cleaning all the pots with switch cleaner first (open the amp and spray it into the pots them selves through little holes). If not there then Check for a loose wire, and can also tap the boards with back of screwdriver while the amp is playing to listen for dry joints (loose solder and CAUTION for getting a shock also!!)
Pretty sure though on the pots or dry joints.

Best of luck

Try just the power amp on ..nothing connected
no Dakiom thingy either. It's a matter of elimination. Start at the output device and work back. Keep the Dakiom out of the loop.
If there's hum with just the Adcom..then it's the ADCOM

I don't have experience with the 7500 but I had a 7000 with multiple bad channels (red light lit). The problem was bad filter capacitors on the amplifier boards. The large black filter caps (two per channel) were leaking on every amp board. Its a relatively easy repair if you can solder.

FYI you'll probably need a set of small hex head drivers to open the unit.