Temporarily change the authentication restriction from "SSL Only" to "Unsecure/Secure" to test if a certificate mismatch is causing the block. 3. Clear the OpenAPI External Application Registration
Because 9903 is a "Sequence Jam," it may require a technician to adjust the registration loop or transport speed if mechanical timing is permanently off.
If using SSL, verify that the security certificates are valid and have not expired. konica minolta code 9903
Outdated firmware often misinterprets minor image processing delays as fatal controller errors. Ensure your machine is flashed to the latest production firmware version (e.g., version or newer for i-Series models). Firmware updates resolve known buffer overflow bugs and relax strict sensor timing tolerances that trigger false 99-03 jams. 4. Swap Print Drivers
Disconnect the from the back of the machine. Turn the printer back on. Try to make a local copy directly from the glass platen. If using SSL, verify that the security certificates
Older firmware versions may contain bugs that fail to handle modern network protocols or complex print streams.
If your device is under a managed service contract or click-charge lease, it is highly recommended to hand these findings over to a certified technician. Let them know that you are seeing a code 9903 controller jam so they can arrive with the correct firmware versions or mechanical registration parts ready for installation. Firmware updates resolve known buffer overflow bugs and
: Open the front door of the device, wait 10 seconds, and close it firmly. Tap OK on the display panel to prompt a system reset.
: Internal sensors expect paper or image data to pass points at precise intervals. A delayed sensor flag triggers a "99 jam".
Is it a network cable failing? Is it a corrupted print driver trying to send PCL data to a PostScript interpreter? Is it a third-party software interference? Is the file simply too complex for the RIP (Raster Image Processor) to handle?