Question about Audio Players & Recorders
Left channel stopped working. havent checked fuse as dont know where they are. have not touched chassis
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Posted on Jan 02, 2017
SOURCE: Adcom GFA 7000
your output transistor, IC( integrated circuit), tubes. around the output side of the amplifier.
try to switch on the amplifier without the speakers. also the wire connecting the speakers, if the fuse blow without the speakers its inside your ampilfier. if not its your speaker. hope I helped you with this. don't hesitate to reply. ^.^
Posted on Jan 24, 2008
It sounds as if there is a broken solder joint somewhere that slowly opens up with heat. The other possibility is that an input or driver transistor is dying. Since the whole channel is dying, I would guess the broken joint and/or dying transistor are near the very input of the channel.
A tech can very easily find the spot by playing the amp until it starts to die, then spraying small bursts of freeze spray, one component or area at a time, until the amp suddenly comes back to life.
Posted on Sep 26, 2008
First of all, when bridging an anp, the impenence that it can handle usually goes UP not down. I don't believe that the GPA555 can be bridged without circuit modification.
Posted on Feb 11, 2009
SOURCE: Adcom GFA 555
Lakes Electronics, Inc.
5245 N. University Dr.
Lauderhill, FL 33351
These guys are listed as one of the 2 Adcom service centers in FL and should be your best bet.
Also Jason Schatten @ Electronic labs might be able to help. Electronic Laboratory, Inc.
1301 West Copans Road, A4
Pompano Beach, Florida 33064
Phone: (954) 969-2855
Fax: (954) 969-2879
Hope this helps. Parag
Posted on May 10, 2009
Any fuse blowing is caused by a shorted component in either the power supply section or main audio amp part. Follow the fuse circuit and see where it leads you. Look around for burnt of damaged parts. Suspect anything sitting on a heat sink. The most common culprit is the audio amp main transistors, especially if someone shorted the speaker leads together. In the power part it could be the transformer, the large Electrolytic capacitors, rectifier, or voltage regulator. Some amps use an IC for amplification and this can blow the fuse.
Posted on Oct 19, 2009
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