Power Units - Oki C7200 Service Manual

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
(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 Voltage
CH -900V to 1.4KV
DB -100 to 400V/ +300V
SB Y, M, C, and K:
-100V to -700V
TR 0Kv to 7KV
Service Guide - C7000 Series
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
Use
Voltage to charging roller
Voltage to developing roller
Voltage to toner supply roller
Voltage to transfer roller
Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.
Chapter 2 Operation
Use
Remarks
Variable
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