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SX-950 left channel fried when I dropped the needle!! TWICE!

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patfraley

New Member
Hello All...I am completely mystified. This is the second time this exact same thing has happened. When queuing up a record to play on my PL-570 I accidentally dropped the needle onto the surface and it blew the left channel of my SX-950. First a pop, then smoke. Both times it was the left channel. Does anyone have any idea what would cause such a thing? Is it an easy fix?
 
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Don't do it again!;)

The loud POP was to much for the amplifier.

Was the volume up BTW?:no:
Alcohol?
 
Oerets said:
Don't do it again!;)

The loud POP was to much for the amplifier.

Was the volume up BTW?:no:
Alcohol?
Click to expand...
volume was at less than 25% on the knob. No alcohol. Was adjusting the lift lever height...it was stuck a bit and then dropped suddenly. So being too much for the amplifier, what areas do I need to look at? I'd like to fix myself if it's not a huge task.
 
Keep the volume down.
To keep it from happening again....

You if lucky just blew the outputs. Easy fix for one who knows how. For one that does not, not so much.
 
Odds are good that it shorted an output transistor (or two). The smoke was probably a resistor passing more current than it was designed for. Easy? - depends on your skill level
 
gort69 said:
Odds are good that it shorted an output transistor (or two). The smoke was probably a resistor passing more current than it was designed for. Easy? - depends on your skill level
Click to expand...

thanks for the input. I have replaced some resistors and power supplies on various units with no issues, so I am confident in my soldering skills. What I lack is the expertise to know exactly what needs replaced. Like my first boss told me...I know just enough to get myself in trouble : )
 
It happens. I did it to my AU-719 dropping the needle. I happened to have had a couple beers(or more) and did not hit the muting switch as I usually do.

The good news was that I got the last two sets of NOS outputs from Sten (Stene)

Rob
 
gort69 said:
Odds are good that it shorted an output transistor (or two). The smoke was probably a resistor passing more current than it was designed for. Easy? - depends on your skill level
Click to expand...
I was wondering if it might be the phono input made for a moving coil cartridge or moving magnet type cartridge?
 
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