Ricoh G133 Service Manual page 704

PCU (Photo Conductor Unit)
The TD sensor [A] in the development unit has an ID chip that contains the new unit
detection flag. The machine detects that a PCU is new if the flag in the ID chip is activated.
The machine automatically does the following adjustments when detecting the new unit
detection flag.
PM counter clear for items related to the PCU
Developer initialization
Charge roller voltage control
Process control
Line position adjustment
If the PM counter clear fails, clear the following SPs manually.
SP3-902-9 to -12
G133 6-32 SM