• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Mcintosh MA 2275 Schematic Required

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Hi everyone. This is my first post on here.

Anyone got this amp and had this particular problem....

I am getting coneflap through the left channel only when i use the TT. However the coneflap is not the problem. The problem is that the right channel is not letting through anything below about 25Hz whereas the left channel is going right down to about 1Hz. I have verified this with a function generator. Anyone know what the problem could be? The amp has been repaired before (not by me) due to a volume mismatch.

I could probably repair it myself but i need a circuit diagram. Anyone got one?
 
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