Question about Technics Audio Players & Recorders
Tried cleaning, applied new grease for heat sinks, checked board for any burn marks. Amplifier worked well for hours, then clipped out and now the front display will occasionally light and the unit will work. The fuses are good, still can not find any burn marks on board or any burnt components. I have much newer & better equipment, but would like to fire this up for my man cave. I know it probably isn't worth doing, but if anyone has an answer to this, let me know. I've driven 4 HUGE Klipsch speakers with this since 1990, and it more than paid for itself. If I can repair it cheaply, I will. Thanks, Kirk!
First off, why do you drive the amp into clipping? It's not good for amp, nor your Klipsch. We won't even mention the terrible load that Klipsch in parallel presents to your amplifier, nor the distortion. I would suggest to you, that the amp goes into thermal overload. Trying turning it down by 20-30db, and see if it stays on-line. It can be fixed, if turning it down doesn't help, it can be repaired, but not inexpensively.
Posted on Dec 01, 2014
Testimonial: "The amp never clipped @ high volume in its 20+ years of usage. It is a new development. When I say driving @ high volume, it is far from at the maximum amount. Besides, what difference in the world does it make what kind of speakers the amp is driving?"
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Posted on Jan 02, 2017
SOURCE: Technics SU-G91 OVERLOAD PROBLEM
I had the same problem. As soon as the volume reached about 24db it would go into overload. I was able to fix it by soldering all the connections on the larger power module. The one connected the the heat sink. When I took it apart there where several solder points that had come loose.
Posted on Dec 01, 2007
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