Power Supply Board - OKIDATA OL400e Series Service Manual

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:
+ 38 vdc:
+ 8 vdc:
- 8 vdc:
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:
- 300 vdc:
- 450 vdc:
+ 1.6 Kvdc:
+ 500 vdc:
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Service Manual for OL400e/OL410e/OL410e-PS
Logic circuit supply voltage
Motor / fan drive voltage and source voltage for the high-voltage supply
RS232 line voltage
RS232 line voltage and analog circuit voltage
applied to the charging roller
applied to the developing roller
applied to the toner supply roller
applied to the transfer roller
applied to the cleaning roller
Chapter 2 Principles of Operation
Page: 65