Board Structure
SM 6-41 B234/B235/B236/D101/D102/D103
Detailed
Descriptions
6. IOB (Input/Output Board): Performs three functions:
• Converts sensor output from the paper bank, toner bank unit, and LCT then
sends it to the BCU.
• Converts serial data from the BCU to parallel data for control of the paper
bank, toner bank unit, and LCT components (motors, solenoids, clutches).
• Supplies the 24V power supply from the PSU to the BCU, LCT, and
interlock system for the development motor, drum motor, and paper feed
motor.
7. LCDC (LCD Control): The LCDC controls the operation panel and relays the
internal signals of the optical system (SBU, MCUÅÆIPU, BCU)
8. LDB (LD Board): The LDB controls the laser diodes. It also contains the laser
diodes.
9. AC Drive Board: The AC drive board controls AC power for the fusing lamps
and the anti-condensation heaters.
10. MCU (Motor Control Unit): Controls the scanner motor with the commands from
the BCU. Also controls exposure lamp on/off timing, APS detection, the fan
motors, generation of gate signals, and transmission of serial data.
11. Lamp Regulators: Control the exposure lamps in the flat bed scanner
12. Operation Panel: Controls the operation panel and LCD display panel.
13. Operation Switch Board: Switches main power to the machine on/off.
14. Polygon Mirror Motor Control Board: Controls the polygon motor.
15. PSU-C (Power Supply Unit-Controller): Supplies DC power for the controller.
16. PSU-Ea, PSU-Eb (Power Supply Unit-Engine): Supplies DC power for the
machine.
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