8-8 Phaser 6121MFP Service Manual
Service Parts Disassembly
3. Position the removed Imaging Unit as shown.
Keep the Imaging Unit horizontal and place it where it can not become 
dirty.
Do not leave the Imaging Unit removed for more than 15 minutes, and do 
not place the removed Imaging Unit in a location where it is exposed to 
direct light (such as sunlight).