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Service Manual for OL400e/OL410e/OL410e-PS
Chapter 2 Principles of Operation
2.3.04 Power Supply Board
The power supply board consists of an AC filter circuit, a low-voltage power supply circuit,
a high-voltage power supply circuit, a fuser drive circuit and photosensors.
Low-Voltage Power Supply Circuit
The following voltages are generated by the low-voltage power supply circuit.
+ 5 vdc:
Logic circuit supply voltage
+ 38 vdc:
Motor / fan drive voltage and source voltage for the high-voltage supply
+ 8 vdc:
RS232 line voltage
- 8 vdc:
RS232 line voltage and analog circuit voltage
High-Voltage Power Supply Circuit
This circuit uses the + 38 vdc to generate voltages for the electrophotographic process.
The control sequence for enabling these voltages is issued by the main controller board.
When the cover-open state is detected, the + 38 vdc is turned off. Turning the +38 vdc
off disables all high-voltage outputs. The high-voltage power circuit generates the voltages
listed below.
- 1.3 Kvdc:
applied to the charging roller
- 300 vdc:
applied to the developing roller
- 450 vdc:
applied to the toner supply roller
+ 1.6 Kvdc:
applied to the transfer roller
+ 500 vdc:
applied to the cleaning roller
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Содержание OL400e Series
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