Canon PIXMA MG6821 User Manual - Page 857

Printing Is Slow Check1 Machine may be printing or scanning a large job from another computer. Check2 Monitor signal status and move machine and wireless router as necessary. • For Windows: Monitoring Wireless Network Status • For Mac OS: Monitoring Wireless Network Status Make sure there are no obstacles between the wireless router and the machine. Wireless communication between different rooms or floors is generally poor. Wireless communication can be impeded by building materials containing metal or concrete. If the machine cannot communicate with the computer over a wireless LAN due to a wall, place the machine and the computer in the same room. Check3 Make sure there is no source of radio wave interference nearby. If a device like a microwave oven that emits radio waves of the same frequency bandwidth as a wireless router is nearby, it may cause interference. Place the wireless router as far away from interference sources as possible. 857