HP LaserJet Enterprise M552 - Low-voltage power supply failure detection; Low-voltage power supply functions; High-voltage power supply

Low-voltage power supply failure detection
The DC controller determines a low-voltage power supply failure and noties the formatter when the low-
voltage power supply does not supply +24 V.
Low-voltage power supply functions
The printer has the following low-voltage power supply functions.
Table 1-9 Low-voltage power supply functions
Function Supported feature
Sleep mode Yes
Power supply voltage detection Yes
Automatic power OFF Yes
Automatic power ON/OFF Yes
Active OFF Yes
Inactive OFF Yes
Network mode No
Power switch illumination Yes
Low-voltage power supply failure detection Yes
Power save mode No
High-voltage power supply
The DC controller controls the high-voltage power supply (HVPS) to generate biases. The high-voltage power
supply delivers the high-voltage biases to the following components used to transfer toner during the image-
formation process:
●
Primary charging roller (in the toner cartridges)
●
Developing roller (in the toner cartridges)
●
Primary transfer roller
●
Secondary transfer roller
●
Pressure roller
●
ITB cleaning brush
20 Chapter 1 Theory of operation ENWW