I replaced the maintenance drawer on the Churches Phaser 850 due to worn out lift pins. Now it fails POST with a 007.004.NNN error. I understand this is a drum clutch failure. Where is the clutch located? Can it be repaired without replacing it? Is there a way to service the Phaser 850 without it "cleaning" every time it is powered up or goes into an error condition? I'm using lots of ColorStix during the troubleshooting. I'm also not sure how to access the Service Mode?