Ricoh D124-17 Service Manual page 691

No.
LED13
LED20 Orange
LED30
LED31
MCU
The MCU (Main Control Unit) performs system control, base engine control, scanner control, and also
controls the SIPU. 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
Color
Standby: FLASH
Yellow
Operation: OFF
Standby: FLASH
Operation: OFF
Normal: FLASH
Yellow
Operation: OFF
Normal: FLASH
Yellow
Operation: OFF
State
Fuses
689