Question about Technics Audio Players & Recorders
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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
SOURCE: Technics SU-V2 keeps cutting out
An amp will cut out if the output protection circuit kicks in. This circuit compares output power against the preset level. Each channel has it's own, independent protector. There are calculations that can be done, but for a novice the rule of thumb is to "never use a speaker with a power rating less than the amp AND a lower impedance than stated". Typically using a 4 ohm load on a 8 ohm system is inviting disaster. Even if the system does not become a smoke generator, you might notice that though "louder", the sound quality is deteriorated. Many "audiophiles" often hook up some combinations of speakers to have "surround" without really understanding that the collective impedance actually changes (generally lowers).
Posted on Jan 21, 2008
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,
Posted on Feb 25, 2009
test you speaker maybe there is a bad connection some where is the spk. box its self ,try changing speakers left to right .
it the spk. are ok open amp see all the connections within the amp .
if this dose not work contact me by mail: email@example.com
Posted on Dec 21, 2009
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