This manual provides complete instructions for installing, configuring and operating the Brother FAX‑2820, FAX‑2920 and MFC‑7220 multifunction devices. It covers safety guidelines, wiring, paper handling, fax transmission, copying, scanning, and advanced settings such as remote fax and password protection.
The document also includes troubleshooting tips, maintenance procedures, specifications for the laser diode, paper recommendations, and regulatory compliance information. Safety warnings and environmental disposal instructions are provided throughout the guide. This manual is written in Chinese.
| Laser diode wavelength | 770‑810 nm |
|---|---|
| Laser output power | Maximum 5 mW |
| Laser safety class | Class 3B |
| Radio‑interference compliance | EN55022 (CISPR Publication 22) / Class B |
| Recommended paper weight | 75‑90 g/m² |
Use a soft, lint‑free cloth to gently wipe the scanner window; avoid using wet hands or abrasive materials.
Unplug the power cord and disconnect the telephone line before cleaning any internal parts.
The device uses a Class 3B laser diode.