Electrical - Oki B6500 Service Manual

5.7 Electrical

INTERLOCK S/W 24V
This safety switch cuts off a 24 VDC power supply from the LVPS to the HVPS
MCU and MAIN MOTOR when the COVER OPEN is open.
INTERLOCK S/W 5V
This safety switch cuts off a 5 VDC power supply from the LVPS to the LD
Assembly of the ROS ASSY when the COVER OPEN is open.
INTERLOCK S/W REAR
This safety switch interrupts a 24 VDC power supply from the LVPS to the HVPS/
MCU and MAIN MOTOR when the COVER REAR is open.
FAN MAIN
This vents air inside the printer to prevent an excessive rise in the inside
temperature.
FAN SUB
This fan takes outside air into the printer to prevent an excessive rise in the inside
temperature. This is mounted on the ROS ASSY in the center on the front side.
LVPS
This generates low DC voltages (5 V and 3 V for Logical Circuit, 5 V for Laser
Diode, and 24 V for Motor and Clutch) from the AC power.
HVPS/MCU
The functions of the HVPS and MCU are incorporated in this substrate. The HVPS
generates high AC and DC voltages and supplies them to the BCR (charging),
Magnet Roll (development), BTR (transfer), and Detack Saw (peeling). The MCU
controls the printing operation according to the information obtained through
communications with the Print Controller and from sensors and switches.
PWBA ESS
This receives data from the Host Computer, performs printing, and controls the
whole printer.
PWBA EXIT MOTOR
This controls the MOTOR ASSY EXIT according to a signal from the HVPS/MCU.
Chapter 6 Principles of Operation
6 – 27