When the toner collection unit (TCU) must be removed to perform service on a device, which
precautionary measure should field technicians remember to implement?

A.
Do not tip the TCU on its side after removing it from the device.

B.
Power off the device before removing the TCU.

C.
Retract the PGC mechanisms before removing the TCU.

D.
Close the ITB cleaning mechanism shutter after removing the TCU.