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i am from Germany, thougt this could be interesting for you.
While repairing an JVC I found this. On left side are MOSFETS,
IRF620 and IRF6215. This IC is bad, it makes no good Sound.
Look at the writings- on the other one The Letters are rounded,
I think this is because it came from Japan. You can buy such an "IC" at reichelt.de (8 Euro) You see also the burned wirings, I will try to replace the Transistor. Sorry for bad english/error if any and greetings. matti
Thanks for posting this.
Did you see this thread?
http://www.diyaudio.com/forums/showthread.php?s=&threadid=82638
Please add more of these nice examples if you find them.
/Hugo
Did you see this thread?
http://www.diyaudio.com/forums/showthread.php?s=&threadid=82638
Please add more of these nice examples if you find them.
/Hugo
An externally hosted image should be here but it was not working when we last tested it.
prepared for new transistors, resistor 170 ohm replaced.
The bad IC had a Middle Point Voltage (where Sony has +/-70mv)
from 0,2 Volt and 0,3 Volt. I could hear that by connecting the Speakers. If this will work again ?
only for fun but interesting, mp3 player ?
my new high end amp
-)
An externally hosted image should be here but it was not working when we last tested it.
my new high end amp
-)
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
prepared, not tested yet
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