Ricoh D144 MPC5502A AP-C3

Blown Fuse Conditions

Power Supply Unit

Fuse	Rating		Symptom when turning on the main switch
	115V	220V - 240V
FU1	15A/250V	8A/250V	No response. (5V power to the PSU is not supplied.
FU2	15A/250V	6.3A/250V	No response. (5V power to the IPU and controller is not supplied.)
FU3*1	2A/250V	2A/250V	5V power to the scanner heater and tray heater is not supplied.
FU4*1	5A/250V	5A/250V	5VE power to the SIO and IOB is not supplied.
FU5*1	5A/250V	5A/250V	5V power to the IOB not supplied.
FU6*1	5A/250V	5A/250V	5V power to the IPU not supplied.
FU7	8A/250V	8A/250V	24VS power to the IOB not supplied.
FU8	8A/250V	8A/250V	24VS power to the IOB not supplied.
FU9	8A/250V	8A/250V	24V power to the IOB and IPU not supplied.
FU10	8A/250V	8A/250V	24V power to the SIO not supplied.
FU11	8A/250V	8A/250V	24V power to the PFU or LCT and finisher not supplied.

AC Drive Board

Fuse	Rating		Symptom when turning on the main switch
	115V	220V - 240V
FU1	15A/250V	8A/250V	SC574-02 occurs.
FU2*1	1A/250V	1A/250V	No Voltage detection

Caution

• For continued protection against risk of fire, replace only with same type and rating of fuse.

*1 Replace the whole board or unit if this fuse blows, because it is soldered.