Here is a service manual. Frigidaire 30 Inch Freestanding Electric Ranges 2001 (5995361523) Service Manual-ApplianceDigest.com. You have to join the site to download the manual but it is free and this is a very good site for manuals and other info for the appliance repair DIYer. It does not look like this oven control board can be calibrated. Check the temperature sensor if it is OK then the control board is the most likely cause.