Sorry to disagree but obviously everything has not been checked or the faulty internal component(s) or break(s) in the circuitry would have been discovered and replaced or repaired...
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.
SOURCE: Technics SU-G91 Left channel bad
Did you ever find the solution to the left channel issue? I have the same problem with mine.
SOURCE: Technics SU-G91 OVERLOAD PROBLEM
THe amp has detected a problem and shutdown to prevent further damage. This unit has 2 amp pacs inside and one or both have failed. If you can solder, you can fix this yourself. The main amp pac is an SVI3206 and can be purchased online for about $60.
Keep me posted.
Dan
SOURCE: My technics amplifier su-g86 started
Most of the time this problem is caused by bad solder joints.
All the units I have repaired all that was needed was to reflow the solder joints.
The most common place is the leads of the hybrid IC.
Usually there are very very fine cracks which can barely be seen with a good magnifying glass.
I usually go ahead and resolder most of the solder joints related to the output section.
Basically the mechanical stress of the heating and cooling causes this as well as the manufacturer trying to use as little solder as possible.
Hope this helps,
Richard
SOURCE: Tecnics SU-G95 stereo overloaded
Power down,disconnect the speakers and power back up. If it still say's overload, it needs to go to service. If not, check your wires, connections, and speakers one by one to hunt down the problem and correct. Hope this helps
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