I had a look and it's pretty much the same story as with everything else they are producing these days. No manual what so ever.
But here are a few links.
ftp://ftp.work.acer-euro.com/desktop/
Don't know if these two will be of any help to you as I don't know how similar they are to your model.
Manual for Acer Aspire T120
Manual for Acer Aspire T130
Biggest problem we've been finding with Acer recently is that they have been trying to get away with not providing the service manual for the systems or motherboards. This in turn has been causing support problems for users and for techs alike including their own techs.
Acer has been doing the same thing to companies that they have bought out such as Gateway and Packard Bell.
I own an FX6800-01e and I have dealt with the nightmare issues myself and have done what I can to help others through these issues.