Image Creation 
D086/D087 4-52  SM 
4.7.2  DRUM UNIT AND DEVELOPMENT UNIT 
The new drum unit has a front cover and a front joint. When you attach the new drum unit to 
the development unit, remove a front cover and a front joint at first. 
And use them for reassembling the new drum unit and development unit. 
1.  If you install a new drum unit, set SP 3902-xxx to "1". 
 Black: 3902-009 
 Yellow: 3902-010 
 Cyan: 3902-011 
 Magenta: 3902-012 
 
  If you do this, then the machine will reset the PM counter for the drum unit 
automatically, after you turn the power on again. 
2.  Turn the machine power off. 
3. PCDU (
 p.4-49) 
 
4.  Front cover [A] (
 x 2) 
 
 
  Do not touch the bearing [A] after removing the front cover. The bearing is 
properly applied with lubricant.