These amps are not complex, isolate the problem. COnnect the amp to a different speaker to see if hte speaker was blown. Headphones sound OK? Look for DC offset on the output pins of the op amps, a sign of failure. Got a scope to look at the waveform through the amp? COUld be a bad output amplifier chip.
And of course American amps must be upside down for proper operation in Austalia.
And of course American amps must be upside down for proper operation in Austalia.
hey its me again. when i use headphones it sounds exactly the same. and when i plug in a mic it gives the same fuzz. When nothing is plugged in it doesn't sound just as bad but you hear it a bit. I have never repaired an amp or really anything much before so like keep it simple english please
Most likely cause with these is output chip - it is the square plastic thing with 5 legs bolted to an aluminium bracket - type number TDA2050. These devices run hot, especially when playing at high volume, and the aluminium bracket / heatsink is not really big enough to keep the chip cool.
Cheers
Graeme
Cheers
Graeme
I could well be meaning buzz because I dont much know the difference Anyways it makes noise when it isn't supposed to like when a guitar is plugged in but you haven't played on it yet. Its strange because sometimes when you play on it the volume seems to increase itself and the pitch goes into an earpiercing scream. not nice
Anyways it makes noise when it isn't supposed to like when a guitar is plugged in but you haven't played on it yet. Its strange because sometimes when you play on it the volume seems to increase itself and the pitch goes into an earpiercing scream. not niceFirst check the solder joints of the input jack on the circuit board - it is common for these to crack, and the jack will wobble around.
If you need to replace the jack itself (the original Fender ones aren't that good), you will need one of these :
,
but a bit of searching does not reveal a supplier in the uk. Cliff Electronics supplies them here in Australia as an Asian import, but Cliff in the uk doesn't seem to. Maybe another uk resident knows of a supplier?
Cheers
Graeme
If you need to replace the jack itself (the original Fender ones aren't that good), you will need one of these :
but a bit of searching does not reveal a supplier in the uk. Cliff Electronics supplies them here in Australia as an Asian import, but Cliff in the uk doesn't seem to. Maybe another uk resident knows of a supplier?
Cheers
Graeme
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