Help with repairing a B&K amp

Jeff Hayat · 28th January 2012

Hi all

I have a B&K st1400 series 2 amplifier that is a number of years old. It has stopped working, and I was hoping I could get someone to point me in the right direction and help me fix it. The circuit does not look that complicated:

If it were, I would not attempt this.

Basically, it's not passing signal. The preamp that feeds it definitely works - have tested that elsewhere. The power led does not come on, however, I do hear that little low freq "beep" through the speakers when powering the unit on. I have a multimeter, but am not really sure where to start.

Was hoping someone had an idea or three....thanks!

Jeff Hayat · 29th January 2012

Got it - thanks to someone on the the Audio Karma forum, the "control muting" switch in the rear was in the wrong position.

28th January 2012	#1
Jeff Hayat Lives for gear Joined: Feb 2009 Posts: 915 Thread Starter	Help with repairing a B&K amp - SOLVED Hi all I have a B&K st1400 series 2 amplifier that is a number of years old. It has stopped working, and I was hoping I could get someone to point me in the right direction and help me fix it. The circuit does not look that complicated: If it were, I would not attempt this. Basically, it's not passing signal. The preamp that feeds it definitely works - have tested that elsewhere. The power led does not come on, however, I do hear that little low freq "beep" through the speakers when powering the unit on. I have a multimeter, but am not really sure where to start. Was hoping someone had an idea or three....thanks! __________________ http://www.universalsampling.com http://www.jeffreyhayat.com YouTube Channel

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29th January 2012	#2
Jeff Hayat Lives for gear Joined: Feb 2009 Posts: 915 Thread Starter	Got it - thanks to someone on the the Audio Karma forum, the "control muting" switch in the rear was in the wrong position.