Oki OKIPAGE4w, Service Manual, Page: 18 / 139

Page: 11
Service Guide OKIPAGE4w
Chapter 2 Operation Description
High-Voltage Power Supply Board
(1) High-Voltage power supply circuit
The high-voltage power supply circuit generates the following voltages required for the
electro-photographic processor from +5 V according to the control sequence from the main control
board. When the cover is open, +5 V supply is automatically interrupted to stop high-voltage output.
Caution:
The TR voltage varies with medium and transfer roller impedance.
(2) Sensors
The high-voltage power supply board consists of the high-voltage power supply circuit that supplies
power to the electro-photographic processor system and the photosensor that detects a paper feeding
system and toners.
Figure 2-2 shows the sensor layout drawing.