OKIDATA OL400e Series, Service Manual

Page: 369 / 397

Page: 226
Service Manual for OL400e/OL410e/OL410e-PS
Chapter A Reference Charts
A.2.05 Power Supply Board (OLAA)
Function
The power supply board converts the AC Input Voltage into +38 vdc, +5 vdc, +8 vdc, and -8 vdc
for use throughout the printer. The power supply board generates the high voltages required for
electrostatic printing. The photosensors and cover open switch are located on this board.
Firmware
NONE
Fuses
F1:125 volt6.3 amp. AC Line Fuse
F2:125 volt1.6 amp. Protects the primary of the AC transformer
F3:125 volt3.15 amp. Protects the +38 vdc and +5 vdc circuits
Jumpers
NONE
Sensors
Refer to Section 2 of this Service Handbook for more information on the sensor functions.
PS1:Paper Exit Sensor
PS2:Paper Sensor (detects the leading edge of the paper)
PS3:Inlet Sensor 1
PS4:Paper End Sensor (detects the presence of paper in the tray)
PS5:Inlet Sensor 2 (detects the paper width)
PS6:Toner Low Sensor
Switches
SW1:Power Switch
SW2:Cover Open Switch
Disables the +38 vdc and high voltage circuits when the cover is open.
Test Points
Refer to the Power Supply Board Illustration for test point locations.