Question about Technics SA-DX750 Receiver
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Posted on Jan 02, 2017
The question is what is causing the overload? The power supply or the output devices on the heat sink?
If you have accidently shorted a speaker wire, then the answer will be output devices, otherwise it could be anything in the power section. You may find a burnt or damged device with either of the causes.
Posted on Mar 09, 2010
rafatecnico amigo mio el error esta en la placa de coneccion de dispositivos auxiliares por favor revisa soldaduras de los dos transistores de potencia que se encuentran juntos y de los dos transistores de acople de los de potencia, si se encuentran bien entonces alguno de ellos esta averiado en cortocircuito o abierto
Posted on Aug 04, 2010
SOURCE: I have a Technics SA
The F70 error certainly indicates a blown fuse inside.
The real problem is why the fuse is blown: there are only two possible reasons
1. there is a short circuit on the output (lines or speakers)
2. you have a blown output transistor (and that means some work and skills to replace).
To be sure, please change the fuse with a same rated fuse (buy more than one because it can blow again). Disconnect the speakers and turn the amp on. If the fuse blows again, it is sure something wrong with the output transistors. If the fuse remains ok, then please check all the wiring to the speakers.
Hope it helped.
Posted on Aug 21, 2011
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