Finding a formal service manual for the Acer IPIMB-AR (Rev 1.02A) motherboard is difficult because Acer typically does not release these manuals to the public. However, you can find detailed technical specifications and header pinouts through community-maintained archives and product spec sheets. Manual & Specification Links
CPU Support: Intel 2nd and 3rd Generation (Sandy Bridge and Ivy Bridge) Core i3, i5, and i7 processors (up to 95W TDP). acer ipimbar rev 102a manual link
Please ensure that the product name is correct, as it might help in narrowing down the search results. Good luck finding the manual! Finding a formal service manual for the Acer