Ricoh MP2550
Troubleshooting. Electrical Component Defects 3
Switches
Component | CN | PCB | State | Symptom |
---|---|---|---|---|
Correct PCU Detect Switch |
327-8 | BCU | Open | The TD sensor initial setting procedure is not performed when a new PCU is installed. |
Shorted | The TD sensor initial setting procedure is performed whenever the front cover is closed. | |||
Front Door Safety Switch | 321-3 | BCU | Open | The Cover Open indicator is not lit even if the front cover is opened. |
Shorted | The Cover Open indicator is lit even if the front cover is closed. | |||
Right Upper Cover Switch | 321-8 | BCU | Open | The Cover Open indicator is not lit even if the right upper cover is opened. |
Shorted | The Cover Open indicator is lit even if the right upper cover is closed. | |||
Right Lower Cover Switch | 321-1 | BCU | Open | The Cover Open indicator is not lit even if the right lower cover is opened. |
Shorted | The Cover Open indicator is lit even if the right lower cover is closed. |
Blown Fuse Conditions
Fuse | Rating | Symptom when turning on the main switch | |
---|---|---|---|
115 V | 220 to 240 V | ||
PSU | |||
FU1 | 15 A/250 V | 8 A/250V | No response. |
FU2 | 8 A/125 V | 5 A/250 V | No response |
FU3 | 2 A/125 V | 1 A/250V | Anti-condensation/Tray Heater does not turn on. |
FU4 | 6.3 A/125 V | 6.3 A/250V | Optional finisher, bridge unit, and shift tray does not work then SC792 is displayed. |
FU5 | 6.3 A/125 V | 6.3 /250 V | All motors do not rotate. The "Cover Open" and SC indicators light. |
FU6 | 6.3 A/125 V | 6.3 A/250V | The touch panel does not turn on, and all motors (except scanner motor) do not rotate. |
FU7 | 5 A/250 V | 5 A/250 V | No response |
FU8 | 5 A/250 V | 5 A/250 V | No response |