The printer illustration is based on HL-4070CDW.
| 1. | Back cover |
| 2. | AC power connector |
| 3. | Parallel interface connector (HL-4050CDN / HL-4070CDW only) |
| 4. | USB interface connector |
| 5. | Network Activity LEDs (Light Emitting Diodes) |
| 6. | 10BASE-T / 100BASE-TX port |
