Pantum P1000 Series, Service Manual

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3.2.4 Printing process
Charging
The steel shaft of the charger roller applies a high-voltage DC bias to the OPC and creates a -600V
negative charge on the surface of the OPC.
Exposure
When the photoconductor (OPC) is exposed to the laser beam the charge on the OPC is removed.
The area on the OPC that was not exposed maintains its charge, creating an image of electric
potential difference. That’s usually called an “electrostatic latent image”.
High voltage 1190V
PCR (charge roller)
OPC
-600V