HP C7769B Service Manual - Page 269

Functional Overview Power Supply Unit (PSU) The PSU is used to supply the power required by the printer in any condition and has the following features: n 130W maximum continuous average power (171 W at peak) with power factor correction. n 4 outputs with voltages of +5.0V, +3.3V, +12V and +32V. n Operates with convection cooling when +32V output is at minimum load but the Power Supply is cooled by forced air provided by a fan in the Power Supply enclosure when the +32V output is loaded. n The Power Supply is connected directly to the Power Switch and a green LED located at the front of the Printer on the bottom left hand side. Power Supply Connector to Main PCA Power Switch Housing Power Switch The Power Supply operates over a voltage range as described in the following table: Rated Voltage Normal Operating Range Functional Operating Range Rated Frequency Frequency Test Limits 100-240 VAC 88 - 264 VAC 80 264 VAC 50/60 Hz 47 -63 Hz HP DesignJets 500 and 800 Series Printers Service Manual 10-5