Question about Kenwood VR-405 Receiver
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Posted on Jan 02, 2017
SOURCE: Kenwood KR V8080 receiver
if you sent 110v down the speaker wires & into the amp you most likely have damaged the audio outputs or the output ic. Look for a big aluminum heatsing & on one side you may find 1 or 2 ic's or numerous transistors, the ic's are hard to check, the transistors are easier to check, if transistors replace in pairs. also check for burnt /open resistors near outputs
Posted on Nov 02, 2006
you may have a dc condition present on speaker outputs. this could be caused by dry solder joints, suggest blanket resolder of the output stages for front channels.
Posted on Dec 10, 2007
If the voltage was 110, the polarity should not have made a difference. In all probability, the input power transformer has an open primary. This can happen with a power surge or just because of age. If you have an Ohmmeter, with the unit unplugged, measure across the 2 input pins for the main transformer. It should read about 3 ohms or less. If it reads infinity, it is open and must be replaced.
Keep us posted,
Posted on Mar 12, 2009
Check all your speaker wires for shorts, especially behind the amp, doesn't take much for something to throw a spanner in the works, like when cleaning house and moving stuff around.
Posted on Oct 03, 2009
What you are hearing is the speaker protection relays. See the link below for a generic explanation of protect mode (the mode your unit is in at the moment.) Update this if you have some test gear and wish to attempt to repair this.
Posted on Sep 27, 2010
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