• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

McIntosh MR-74 no audio output

DavidinNC

Active Member
Looking for ideas in things to check. I’ve got the fixed output on the tuner going to my preamp but no audio is heard out. I’ve made sure to keep the muting feature off. Not getting any hiss or anything from the unit. 48796BE0-8E2C-4EDE-BFC1-AF502D3342A8.jpeg A09D06C5-1DD8-46AD-AB38-43E8D11814F7.jpeg
 
Register to hide this ad
First, connect another source to the preamp's "tuner" input and see whether you hear anything. It could be a problem with the preamp input selector. A CD player or even a turntable should produce sound, but be sure to check the input you are trying for the tuner.

If that works, run that same cable from the preamp to the tuner. If you do get sound, the original cable from the tuner to the preamp could be bad. Cables and connecters seldom fail both channels simultaneously.

If you don't get anything from the fixed outputs, try the variable outputs. If the variable outputs work but not the fixed output, at least the tuner isn't dead.

Is the tuner silent on both AM and FM? Does the signal strength meter move as you move across the dial? Does the stereo indicator light up?

Exercise the front panel switches by moving them through all their settings several times, then reset them to the correct settings and try again. If a switch sits in the same position for years, it can oxidize.

Double-check your antenna connections for AM and FM.

Good luck!
 
Thanks for the idea on the switches needing cleaned. I will go back and check the preamp and also try connecting the tuner directly the amp since it has a volume control.
 
I would definitely check out the power supply voltages from the regulator board. Should have 24 an 40 off it. Manual is available off hifiengine.
 
Back
Top Bottom