HP Radio Port 220, Server Performance Pack 200 Power Supply, Use, Voltage, RS-232driver, W R N I N G, IC power and sensors, Fan power and RS-232driver, " ! a P "

Power Supply

An auto6ranging power supply is located in the electronics enclosure. It accepts and automatically adjusts to an ac input of 90 V through 264 V and produces regulated voltages of

+5 V, +12 V and -12 V, and an unregulated +24 V. These voltages are used as follows:

Voltage	Use
+24 V	Motor drivers and voltage regulator on the main PCA.
	(Regulated +20 V for cartridge circuits on the carriage PCA).
+12 V	Fan power and RS-232 driver.
±12 V	RS-232 driver.
+5 V	IC power and sensors.

The primary portion of the supply contains fusing and input protection circuitry, line filters, and a rectifier. The primary output is converted to a pulse6width6modulated (PWM), unidirectional current by a flyback dc6to6dc converter.

The secondary portion of the power supply contains the four secondary windings of the transformer that convert the PWM current in the primary to four ac voltages, which are rectified to the +5 V, +12 V, -12 V and +24 V dc voltages required by the plotter. Standard +12 V and -12 V regulators are included in the secondary portion of the power supply.

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5632 FunctionalOverview

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