HP color laserjet 4500 Manuale Utente
72
Chapter 3 Power supply
EN
AC/DC power supply
The low-voltage power supply circuit supplies +24 Vdc and +5 Vdc,
which is required for the printer, and 3.3 and 5 Vdc, which is required for
the video controller.
which is required for the printer, and 3.3 and 5 Vdc, which is required for
the video controller.
+24 Vdc
•
The paper pickup motor, scanner motor, and high-voltage power
supply PCB use +24 Vdc.
supply PCB use +24 Vdc.
•
The front door switch or the rear door switch is deactivated by
opening the drum cartridge drawer, ITB unit drawer, toner cartridge
door, or delivery door. These switches are in series and disable the
24 Vdc when open.
opening the drum cartridge drawer, ITB unit drawer, toner cartridge
door, or delivery door. These switches are in series and disable the
24 Vdc when open.
+5 Vdc
•
The sensors and the ICs on the DC controller PCB use +5 Vdc.
•
The low-voltage power supply circuit monitors the 5 VS (volt signal)
fed back from the connector PCB to ensure the 5 V power supply to
the formatter.
fed back from the connector PCB to ensure the 5 V power supply to
the formatter.
+3.3 Vdc
•
Formatter PCA
•
DIMM
•
EIO PCA