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AV Receiver Pioneer SX-217

volverine357

May 30, 2022
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May 30, 2022
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Hi, my receiver's right channel is quiet. When I turn up the volume to loud, it turns on and stays operational. I tried heating up the transistors with a hair dryer, but that didn't help. Is it even a transistor problem or should I be looking at something else? Thanks.
 

volverine357

May 30, 2022
9
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volverine357

May 30, 2022
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May 30, 2022
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Volume is digitally controlled. Should I freeze the transistors? I once fixed RAM by heating it up. (Power off of course)
 
Last edited:

AnalogKid

Jun 10, 2015
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Jun 10, 2015
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The STK412 is a dual, 150 W/channel audio power amplifier hybrid module. You have two of them, for the two main channels and the two surround channels. Of those four outputs, which ones are behaving correctly and which ones are not?

Also, are the sub woofer and other outputs behaving correctly?

ak
 

volverine357

May 30, 2022
9
Joined
May 30, 2022
Messages
9
The STK412 is a dual, 150 W/channel audio power amplifier hybrid module. You have two of them, for the two main channels and the two surround channels. Of those four outputs, which ones are behaving correctly and which ones are not?

Also, are the sub woofer and other outputs behaving correctly?

ak
It seems like everything else works fine just the right channel is acting like it's fried or something
 

AnalogKid

Jun 10, 2015
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Hi, my receiver's right channel is quiet. When I turn up the volume to loud, it turns on and stays operational.

1. When it turns on, is it distorted? Also, is its volume approx. the same as the other channel?

2. After it comes on, does it stay on when you turn down the volume? If it does, is it distorted or out of balance?

ak
 

volverine357

May 30, 2022
9
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May 30, 2022
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When I turn it on it's almost inaudible. When I play something loud enough it fixes it, but until the restart.

When I turn down the volume it sounds fine, maybe a tiny bit quieter than the left one.
 

volverine357

May 30, 2022
9
Joined
May 30, 2022
Messages
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1. When it turns on, is it distorted? Also, is its volume app

2. After it comes on, does it stay on when you turn down the volume? If it does, is it distorted or out of balance?

ak
Also it's kind of cracking like a mildly durned up speaker
 

John Canon

Jun 1, 2022
66
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Jun 1, 2022
Messages
66
I bet it is a broken or cold solder joint. So look closely at every solder joint where the component lead goes through the PC board.

If each one is not shiny and smooth give it a quick touch with your small point soldering iron and a tiny dot of fluxy solder. Leave any SMD solder points for now, or you can look with a magnifier.
 
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