Ricoh MP3350B
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 |