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Eng
Ricoh D144 MPC5502A AP-C3
Troubleshooting. Electrical Component Defects 3
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.