Konica Minolta IEEE 802.1X Error 19
The authentication server presented an EAP certificate that is expired.
Error meaning
The EAP server certificate is expired.
This meaning is tied to the reviewed family/platform and subsystem below; do not reuse the number or wording by itself on a different printer family or protocol.
Applies to
bizhub C287/C227
- bizhub C287
- bizhub C227
Common formatting
These are formatting/lookup aliases for this reviewed condition, not separate error pages.
- 19
- ieee8021x-19
What usually causes it
- The RADIUS/EAP server certificate passed its expiration date.
- The printer's clock is set too far into the future, making the certificate appear expired.
- A replacement server certificate was installed on some authentication nodes but this printer is reaching an older node.
What to try
Check the printer clock
Make sure the date and time are reasonable before concluding that the server certificate is expired.
Have the administrator inspect the active RADIUS certificate
Confirm the certificate presented to clients is within its validity period and is the intended replacement if a renewal occurred.
Check clustered authentication servers
If the environment uses multiple RADIUS nodes, verify all nodes were updated and are presenting the same current certificate.
Retry after the certificate path is corrected
Reconnect without disabling certificate validation. An expired server certificate should be replaced or the incorrect clock corrected.
After each corrective action
Retry the same operation that produced 19. If it now works, stop there rather than changing unrelated printer, network, supply, or service settings.
If the code returns
If code 19 is intermittent, compare which authentication server handled each attempt; one node may still be presenting an expired certificate.
When service may be needed
Certificate renewal is an administrator task. Printer disassembly is not appropriate, and bypassing expiration checks would reduce 802.1X security.
Continue with guided troubleshooting
If the printer still is not working after the reviewed checks, carry this verified error context into the guided troubleshooter.
Related information
Verified source
Official Konica Minolta product-family user guide. Candidate meanings are paraphrased from protocol-specific code tables; manufacturer prose must not be copied into public pages.