| No. | Description | No. | Description |
|---|
| 1 | LD Board (C/K) | 11 | Laser Synchronization Detector (M) [Rear edge] |
| 2 | Laser Synchronization Detector (K) [Rear edge] | 12 | Laser Synchronization Detector (M) [Front] |
| 3 | Polygon Motor (C/K) | 13 | Polygon Motor Control Board (Y/M) |
| 4 | Laser Synchronization Detector (K) [Front] | 14 | Image Skew Correction Motor (M) |
| 5 | Polygon Motor Control Board (C/K) | 15 | Thermistor (M) |
| 6 | Laser Synchronization Detector (C) [Rear edge] | 16 | Image Skew Correction Motor (Y) |
| 7 | Image Skew Correction Motor (K) | 17 | Laser Synchronization Detector (Y) [Front] |
| 8 | Laser Synchronization Detector (C) [Front] | 18 | Laser Synchronization Detector (Y) [Rear edge] |
| 9 | Thermistor (K) | 19 | Polygon Motor (Y/M) |
| 10 | Image Skew Correction Motor (C) | 20 | LD Board (Y/M) |