Mcu Leds - Ricoh B286 Service Manual

Board LEDS
No. Color
Vcc1 +5.1 V GREEN

MCU LEDs

The MCU (Main Control Unit) performs system control, base engine control, scanner
control, and also controls the IPU. The MCU also controls:
! I/O for the base engine (high voltage power supply, motors, sensors, solenoids,
clutches, fusing temperature, customer support systems, etc.)
! Scanning signals (sensors, motors)
! Power supply
! Scanner motor output
MCU LED 1 to 4
No. Color
LED 1 GREEN
LED 2 GREEN
LED 3 ORANGE
LED 4 ORANGE
B286/B289
shorted or is defective.
ON Normal. Also remains on in auto off mode.
! PSU defective, or the +5.1 system (Vcc1) has
OFF
shorted or is defective.
Operation
Firmware update
End of firmware update, normal operation
Firmware update
End of firmware update, normal operation
Firmware update
End of firmware update, normal operation
Firmware update
End of firmware update, normal operation
4-46
Meaning
LED Action
Flashes rapidly
Flashes slowly
On
Off
Flashes rapidly
Flashes slowly
On
Off
SM