Sub-Power Supply Board (Psub-150) - OKIDATA OF1000 Service Manual

2.4.04 Sub-Power Supply Board (PSUB-150)

The PSUB-150 consists of IC1 (a one-chip CPU), a cover-open switch, the high voltage generation circuit
and the photo-sensors.
Photosensors
· PS1 - Outlet Sensor
- Detects paper jams at the paper exit path.
· PS2 - Paper Sensor
- Along with the outlet sensor, is used to monitor paper feed and paper length.
· PS3 - Inlet Sensor 1
- Detects the leading edge of the paper. Used in the determination of when to
switch from the hopping to feeding operation.
· PS4 - Paper-end Sensor
- Detects the presence of paper in the cassette. (ON: Paper is present)
· PS5 - Inlet Sensor 2
- Detects the width of the receive paper (ON: A4 or larger)
· PS6 - Toner-low Sensor
- Detects a lack of toner
Cover Open Switch
Whenever the stacker cover is opened, the cover open switch is turned OFF. This removes the + 38 vdc
source voltage from the high-voltage generation circuit. As a result, all high-voltage outputs are disabled.
The CVOPN signal is sent to the MCNT-150 and the cover open routine is performed. The message
COVER OPEN will be displayed on the operator panel.
High-Voltage Circuits
The following voltages are generated for use in the electro-static printing process.
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)
Service Guide OF1000
Chapter 2 Principles of Operation
Page: 41