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Harmon Kardon HK990 Vxi
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Old 17th October 2016, 12:27 PM   #1
Carlosraj is offline Carlosraj  United Kingdom
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Join Date: Jan 2010
Default Harmon Kardon HK990 Vxi


I am working on this amp and need some assistance. The left channel got no sound. I realise that the "high current" and "high voltage" red LEDs are ON. I checked the power transistors and other transistors on the left channel power amp board, but they seem to be OK. I do not know whether it normal for the "High current" and "High voltage" indicators to come ON or is it due to a fault. Please advice.


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Old 17th October 2016, 10:58 PM   #2
llwhtt is offline llwhtt  United States
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Join Date: Jun 2008
Location: SoCal
There should be a 4 Ohm/ 8 Ohm switch on the back, in the 4 Ohm setting the "High Current" light should be on. The lights are NOT an indicator of a problem.

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