Actually now that I'm looking at the service manual, it looks like it's going to be a bitch to get to if I'm correct. If I'm reading the schematic correctly, it looks like it's on the main board under the power supply. Corner top right if looking at board. I don't think the instructions I referred to above get you there all the way. I think Redbus gave me complete instructions on how to dismantle the DM 3200. If I find them I'll upload them to the forum. Probably very similar to dm4800.