Oki C7200 Service Manual - Page 28

Service Guide - C7000 Series Chapter 2 Operation Page: 9 2.3 Power Units There are a low voltage power unit consists of an AC filter circuit, low voltage power circuit and heater driver circuit, and a high voltage power unit organizes a high voltage power circuit. (1) Low voltage power supply circuit. This circuit generates the following voltages. Output voltage +3.8 V +3.8 V +5 V +34 V -12 V Use CU LSI LED head Logic circuit power supply, PU CPU Motor, drive voltage and power supply voltage for high voltage power supply OP Amp, High voltage power supply (2) High voltage power supply circuit This circuit generates the following voltages of not less than +34V, which are required for electrophotographic process, according to control sequences from the controller board. Output CH DB SB TR Voltage -900V to 1.4KV -100 to 400V/ +300V Y, M, C, and K: -100V to -700V 0Kv to 7KV Use Voltage to charging roller Voltage to developing roller Voltage to toner supply roller Voltage to transfer roller Remarks Variable Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.