TV/VCR/Stereo Troubleshooting/Technics SA-GX303

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Graham W wrote at 2013-01-12 03:15:47
I have the same unit and occasionally have the same problem. How I fixed it:  Remove the cover of the amp after DISCONNECTING power. It is held on by 6 philips screws. The two banked volume potentiometers are right side, behind the large volume control.

Now get some spray-type electronic contact cleaner/head cleaner and spray a few shots directly into the volume pot's while rapidly rotating the volume control from low to high - several times. There are small access holes in the pot's that allow this.

This ALWAYS clears up the crackling for me. It lasts about a year or so and then I have to do it again.  This is also an excellent opportunity to blow out any accumulated dust off the power transistors and the cooling fan assembly.  My unit is about 20 or more years old and I have NO desire to replace it. It powers my 42 year old RSC Columbus Series speakers with magnificent sound.


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cleggsan

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Consumer Electronics of all kinds. Audio, esoteric audio systems and components, video, tv. Digital equipment for consumer use. Ham radio and automotive electronics. Note: I give advice on tv repair based on general consumer electronics engineering experience but I am not engaged in actual repair of sets. MAKE SURE YOU GIVE THE MAKE AND MODEL NUMBER AND AGE OF THE SET. BE SURE TO CHECK YOUR EMAIL FOR THE RETURN ANSWER DURING THE NEXT 24 HOURS AS I TRY TO REPLY TO ALL QUESTIONS WITHIN THE SAME DAY IF NOT THE SAME HOUR.

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