Ricoh D072 Service Manual page 306

PCU: The connector on the PCU.
4.1.2 BLOWN FUSE CONDITIONS
All of these fuses are on the power supply unit.
Rating
Fuse
120 V
FU1 15A/125V
FU2 5A/125V
4.1.3 BICU LED DISPLAY
Number
LED2 LED2 blinks in normal operation.
SM Appendix
220 – 240 V
8A/250 V No response
2.5A/250V No response
Function
4-3
Electrical Component Defects
At main switch ON
D067/D068/D069/D072