Ricoh MP3350B
Troubleshooting. Electrical Component Defects 2
Sensors
| Component | CN | PCB | State | Description |
|---|---|---|---|---|
ID Sensor |
321-1 |
BCU |
Open |
SC392 is displayed (see note) |
Shorted |
||||
Interchange/Inverter |
331-9 |
BCU |
Open |
The Paper Jam indicator will light whenever a copy is made. |
Shorted |
The Paper Jam indicator lights even if there is no paper. |
|||
Lower Relay Sensor |
308-4 |
BCU |
Open |
The Paper Jam indicator will light whenever a copy is made. |
Shorted |
The Paper Jam indicator lights even if there is no paper. |
|||
New PCU Detect Sensor |
327-6 |
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 |
|||
Paper End Sensor (Bypass) |
860-3 |
BCU |
Open |
The Paper End indicator lights even if paper is placed in the 1st paper tray. |
Shorted |
The Paper End indicator does not light even if there is no paper in the 1st paper tray. |
|||
Paper End Sensor (Duplex) |
860-3 |
BCU |
Open |
The Paper End indicator lights even if paper is placed in the 1st paper tray. |
Shorted |
The Paper End indicator does not light even if there is no paper in the 1st paper tray. |
|||
Paper Exit Sensor |
324-1 |
BCU |
Open |
The Paper Jam indicator will light whenever a copy is made. |
| Shorted | The Paper Jam indicator lights even if there is no paper. | |||
| Paper Overflow Sensor | 324-4 | BCU | Open | The paper overflow message is not displayed when the paper overfull condition exist. |
| Shorted | The paper overflow message is displayed. | |||
| Paper Overflow Sensor | 703-1 | CKB | Open | The paper overflow message is not displayed when the paper overfull condition exist. |
| Shorted | The paper overflow message is displayed. | |||
| Paper Present Sensor | 330-1 | BCU | Open | LED does not light even if paper is in 1-bin tray. |
| Shorted | LED lights even if paper is not in 1-bin tray. | |||
| Paper Size Sensor (Bypass) | 860-6 | BCU | Open | The CPU cannot detect the proper paper size, and misfeeds may occur when a copy is made. |
| Shorted | ||||
| Paper Size Sensor (Duplex) | 860-6 | BCU | Open | The CPU cannot detect the proper paper size, and misfeeds may occur when a copy is made. |
| Shorted | ||||
| Registration Sensor | 321-5 | BCU | Open | The Paper Jam indicator will light whenever a copy is made. |
| Shorted | The Paper Jam indicator lights even if there is no paper. | |||
| Relay Sensor | 702-1 | CKB | Open | The Paper Jam indicator will light whenever a copy is made. |
| Shorted | The Paper Jam indicator lights even if there is no paper. | |||
| Scanner HP Sensor | 228-1 | SIO | Open | SC120 is displayed. |
| Shorted | The CPU does not detect the scanner home position and the scanner motor does not stop. | |||
| Shift Sensor | 903-1 | STB | Open | SC770 is displayed. |
| Shorted | ||||
| TD Sensor | 327-1 | BCU | Open | SC390 is displayed. |
| Shorted | ||||
| Upper Relay Sensor | 307-4 | BCU | Open | The Paper Jam indicator will light whenever a copy is made. |
| Shorted | The Paper Jam indicator lights even if there is no paper. |
Note:
An SC condition occurs only when a new PCU is being installed in the machine. During copying, if the ID sensor fails, the image density will be changed.