Question about Harman Kardon AVR 25 MKII
When I turn on my receiver, within a few seconds it clicks off. I have removed the cover. The fuses are all good. I have lifted up the board that has the rear speakers, center speaker, antenna, etc... however, I do not see any obvious burning or broken soder links. It stays powered up long enough to change from say phono to tuner. I believe it became to hot. Some of the tabs that hold items to the board described above, that are plastic show signs of slight melting.
It sounds like a problem with the power supply. You might be able to find a place that can fix it, but I don't know for sure. It also could be a broken solder joint in the power supply.
Posted on Jan 12, 2009
Can you be more specific as to "plastic tabs that show signs of slight melting"? Like where are they in relation to components / power supply / heatsinks / power transformer? A first shot... it may be output power fets/transistors (one is open or shorted) that is making one or more of the speaker outputs go to the PS rail. DC shutdown. Does this receiver indicate any "overtemp" or "protect" warnings? I really need a little more specifics.
Posted on Aug 20, 2007
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Posted on Jan 02, 2017
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