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Marantz 4270 Service Bulletins

ocdecio

ocdecio

The proof of the restoring is in the listening.
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Does anyone have a copy of the 4270 Service Bulletins M-4270-1 and M-4270-2? I see they showed up briefly at the auction site but I wasn't fast enough to get them. I am particularly interested in the one that discusses power amp stability, and if anyone knows what that's about it would also be helpful. Thanks!
 
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I looked in my 4270 folder and no such items. Bummer! Also looked at the owner's manual (you never know), and the SM i had and no luck there either. I can always open up the two I have for reference if you need. We're out of town next Weds. for 10 days.
 
Thank you, @rBuckner ! I do have the service manual, but I saw one for sale with both bulletins but it was sold already. If you happen to come across the bulletin for amp stability it will be appreciated, but no hurry and have a good time!
 
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