Canon MAXIFY GX5020 Wireless MegaTank Inkjet Color Printer - Manual (Page 226)

In addition, 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.
Step2 : Solve Problems, Using Wi-Fi Connection Assistant.
Diagnose and repair the network connections using Wi-Fi Connection Assistant.
Download Wi-Fi Connection Assistant from the below page, and install it on your computer.
Checking Printer Connection Status Using Wi-Fi Connection Assistant
Refer to below in regard to starting up Wi-Fi Connection Assistant.
• For Windows: •
Starting Up Wi-Fi Connection Assistant
• For macOS: •
Starting Up Wi-Fi Connection Assistant
Step3 : If the Solution Tool Does Not Solve the Problem.
Check1 Make sure Enable bidirectional support is selected in Ports sheet of Printer
properties dialog box. (Windows)
If not, select it to enable the bidirectional support.
Check2 Make sure security software's firewall is off.
If your security software's firewall is on, a message may appear warning you that Canon software is attempting to
access the network. If this warning message appears, set security software to always allow access.
If you are using any programs that switch between network environments, check their settings. Some programs
use a firewall by default.
Check3 If printer is connected to AirPort Base Station via LAN, make sure you use
alphanumeric characters for network name (SSID). (macOS)
Check4 Solve network troubles with the printer's diagnostic functions.
See below.
Solve Network Troubles with The Printer's Diagnostic Functions
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