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Service Guide OF1000
Chapter 2 Principles of Operation
2.4.03 Power Supply Board (PWU-150)
The power supply is a switching-type unit, which generates the following voltages from the AC
input voltage.
· + 5 vdc : Printer Logic
· + / - 12 vdc: Interface Signal Levels
· + 38 vdc: Transmit Stepper Motor, Registration / Drum Motor Drive,
Fan Drive, high-voltage source.
When the PCNT-150 board enables the HEATON signal, the power supply provides the AC
voltage to the fuser lamp via the PSUB-150 board.
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Summary of Contents for OF1000
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