Main Boards 1
| No. | Description | No. | Description |
|---|---|---|---|
| 1 | Toner Supply Unit Safety Switch 1/2 *1 | 8 | Left Lower Door LED |
| 2 | Duplex Inverter Motor | 9 | Front Lower Cover SW |
| 3 | Drawer Safety Switch 1/2 | 10 | LSB |
| 4 | ITB Temperature/Humidity Sensor | 11 | Faceplate Set Sensor*1 |
| 5 | Purge Tray LED | 12 | Main Power Switch |
| 6 | Purged Paper Sensor | 13 | Proximity Sensor |
| 7 | Lower Guide Plate LED |
*1 Pro C5200S/C5210S only
Main Boards 2
| No. | Description | No. | Description |
|---|---|---|---|
| 1 | Potential Sensor Board | 8 | PFB |
| 2 | Controller Board | 9 | PSU1 |
| 3 | HDD Unit | 10 | IOB |
| 4 | PSU2 | 11 | BICU |
| 5 | Anti-Condensation Heater Switch | 12 | Combined High-Voltage Power Supply Board (KC) |
| 6 | AC Drive Board | 13 | Combined High-Voltage Power Supply Board (MY) |
| 7 | IH Inverter |