Electrical - Oki B6200 Maintenance 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.
SWITCH I/L ASSY
This assembly consists of the following two safety switches.
• Interlock S/W 5VR
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 Front R
This safety switch cuts off the INTERLOCK BEF (the signal indicating that the front cover is
open) from the LVPS to the HVPS/MCU when the COVER OPEN is open.
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Chapter 6 Principle of Operation