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Old 22nd March 2009, 05:20 PM   #1
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Join Date: May 2005
Location: Scotland
Default Mcintosh MA 2275 Schematic Required

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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Old 22nd March 2009, 10:53 PM   #2
burbeck is offline burbeck  United Kingdom
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Join Date: Aug 2004
Location: Ratae Coritanorum
hi all
im looking for a service manual/ schematic for this model.

fault i have noisey on power down bothe channels

any help apprietiated
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bob
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Old 23rd March 2009, 12:30 AM   #3
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Quote:
Originally posted by burbeck
hi all
im looking for a service manual/ schematic for this model.

fault i have noisey on power down bothe channels

any help apprietiated
Is it a loud "pop" when you go into standby? This is quite normal. Mines does it aswell.
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Old 23rd March 2009, 01:36 AM   #4
burbeck is offline burbeck  United Kingdom
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Location: Ratae Coritanorum
yes and it has got progressively worse, now it is so bad the customer fears his speakers will be damaged.
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