Canon PIXMA TR8620 / TR8620a series
TR8620 network trouble: isolate the LAN link, discovery, and print queue
The TR8600 manual documents wireless networking and a Remote UI that runs in a browser over a LAN connection. Those functions apply to the listed TR8620/TR8620a family, but Remote UI is not itself a wireless setup method: the printer must already be connected to the network. When printing stops after a router change, separate printer connectivity from computer discovery and queue state before resetting network settings. This avoids erasing a working printer configuration while troubleshooting an application or driver that merely has an old address.
Capture the printer’s network status and the computer’s exact message before changing anything. Canon’s manual covers “Cannot Find Printer During Setup,” “Cannot Find Printer while Using Wi-Fi,” and printer use after replacing a wireless router. The staged process is to verify the printer is connected to the intended network, confirm the computer is on that network, then re-add or update the device if discovery is stale. Remote UI can help after the link works by showing status and settings, but it cannot be opened when the printer has no LAN path.
Confirm the model and the current network
The Canon TR8600 series online manual lists TR8620, TR8620a, TR8622 and TR8622a together. Confirm the name printed on the device, then check whether the router or its SSID/password changed immediately before the issue began. Note whether the printer is connected by Wi-Fi or wired LAN and whether another device can print. This timeline tells you whether to use Wi-Fi setup, local-network discovery or a computer queue check. Avoid selecting a network reset just because the computer says “offline”; first inspect the printer’s own connection status.
Verify connection before changing the computer queue
Canon’s network troubleshooting separates initial setup from inability to find a printer while already using Wi-Fi. Make sure the TR8620 and the computer use the intended network rather than a guest or isolated network. Check the printer’s displayed network name/status, then compare it with the router and computer. If the printer is connected but only one computer cannot see it, preserve the printer’s wireless configuration and address; proceed to driver discovery on that computer. If the printer itself is disconnected, follow the manual’s wireless connection instructions before deleting software.
Use Remote UI for status only after LAN access is restored
Canon describes Remote UI as a browser-based way to check status and change printer settings over a LAN connection. It is useful when the printer is already online: open its address from a computer or supported device on that network, verify the printer status, and review configuration. If Remote UI cannot open, that is evidence of a connectivity or address issue, not proof that the website feature is absent. Do not expose the printer to an outside network or use a guessed address; rely on the device’s network information and the manual.
Re-add the printer only after checking for stale discovery
If the printer reports connected but the computer still cannot find it, use Canon’s supported driver/setup instructions to update or re-add the discovered device. The TR8600 contents include failed MP Drivers installation and updating MP Drivers in a network environment. Confirm operating system and driver package, and remove only the stale device entry if the official setup process instructs it. A blanket driver uninstall can remove scan/fax components that are still working, so first note which functions fail—printing, scanning, faxing or all network services.
Treat router replacement as a network migration
A new router may use a different network name, password, band or security policy. The Canon troubleshooting list specifically includes printer use after replacing a wireless router or changing router settings. Reconnect with the new credentials by the documented procedure and allow the printer to obtain a current network address. Then test a local print, followed by scan/fax or mobile workflows as needed. If a fixed address was configured through Remote UI, compare it against the new router’s subnet; do not copy old values without checking the current network.
Record enough detail for a support case
If the printer remains unavailable, report the exact TR8620 variant, connection type, router change, printer connection status, whether Remote UI opens, and whether another computer can discover it. Include the exact operating system and Canon driver version, plus any setup message. This evidence divides printer-side association from computer-side discovery and driver installation. Save the current settings before any reset, since a network reset may require reconnecting all clients. Canon’s service path can then use the right network troubleshooting branch without repeated changes that obscure the failure.