asked Nov 1, 2018 at 9:16pm
Xerox Xerox Phaser 8400

Error code 37,016,43 and DC test points

Hi! I have a Xerox Phaser 8400 printer that has an error code of 37,016,43. I have the service manual and the first step is to check the 50V power at the test point under the RAM DIMMs. I have found TP840,TP841 and TP842 below and to the left of the RAM DIMMS. Which one is the right one? Also do I check from the test point to ground? I believe it is DC but I'm not sure. Any help would be appreciated.

Thanks in advance.