Phono input on 2240 not working

[stephenbyron]

Hello All,
I got a line on a nice 2240. Only problem is the seller says the phono input doesnt work. Anybody out there have any experience with a problem like this? I figure its probably a blown pre amp, but i dont know much more than that. Are they difficult to find and replace?
Much obliged.

 

[justw]

The phone pre-amp is made up of discrete transistors. You can find a service manual/schematic here. http://www.hifiengine.com/manuals.php?man=Marantz
Shouldn't be too big a problem to repair unless it burst into flames.

 

[Nakdoc]

Since neither channel works, look first at the power supply for the phono board. Usually it is a single positive supply, on a red wire! 20-30volts dc

 

[marantzbe]

Look for bad solder joint.

Tony