Harman Kardon AVR 120

SoNic_real_one · 03:32 AM

I have an annoying problem with my HK AVR 120 (almost the same as AVR 220/320/520 for the main parts).
For a while now, if I turn it on from stand-by, it will work for 30 seconds and after that enters again in stand-by.
I do start ot for 3-6 times and then it stopps entering in stand-by and works perfectly.
The "POWER" command comes ok from the Main CPU and drops after the 30 seconds, I did masure the "protect" voltage and it is normal as per schematics and not changing while it is on (first time or any other time).
For looks like the main CPU has some firmware issues or something. But why now, after 5-7 years?
I have foun on the net the same problem for many all of those recivers.
Is anyone here that have knowledge about this problem?

16th November 2009, 03:20 AM	#1
SoNic_real_one diyAudio Member Join Date: Jan 2008 Location: Virginia	Harman Kardon AVR 120 I have an annoying problem with my HK AVR 120 (almost the same as AVR 220/320/520 for the main parts). For a while now, if I turn it on from stand-by, it will work for 30 seconds and after that enters again in stand-by. I do start ot for 3-6 times and then it stopps entering in stand-by and works perfectly. The "POWER" command comes ok from the Main CPU and drops after the 30 seconds, I did masure the "protect" voltage and it is normal as per schematics and not changing while it is on (first time or any other time). For looks like the main CPU has some firmware issues or something. But why now, after 5-7 years? I have foun on the net the same problem for many all of those recivers. Is anyone here that have knowledge about this problem? Last edited by SoNic_real_one; 16th November 2009 at 03:32 AM.

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