RICOH Error Code 79
HIGHController Communication Error
Error Code 79 on a RICOH printer indicates a communication problem between the main controller board and other critical components, often preventing the printer from operating.
RICOH Error Code 79 typically points to an internal communication failure within the printer's core systems. This means the main controller board, which acts as the 'brain' of the printer, is unable to properly communicate with other essential components such as the engine board, memory modules, or network interface. This can be caused by a variety of factors, including loose cable connections, faulty circuit boards, corrupted firmware, or even power supply irregularities. When this error occurs, the printer will usually cease all operations and display the error code prominently. It's a critical error because without proper communication, the printer cannot process print jobs, manage its internal functions, or even initialize correctly. While sometimes a simple reset can clear transient communication glitches, persistent occurrences often suggest a more significant hardware or firmware issue that requires attention.
- 1
Perform a hard reset: Turn off the printer using the main power switch, unplug it from the wall outlet, wait for 5-10 minutes, then plug it back in and power it on.
- 2
Check all accessible cable connections: With the printer off and unplugged, carefully open any easily accessible covers (e.g., rear panel, side panel if user-serviceable) and gently reseat any visible ribbon cables or power connectors.
- 3
Ensure the printer is connected directly to a wall outlet: Avoid surge protectors or UPS units temporarily to rule out power supply inconsistencies.
- 4
Verify network cable integrity (if applicable): If the printer is networked, try disconnecting and reconnecting the Ethernet cable. If using Wi-Fi, try restarting your router.
- 5
Check for any physical obstructions or foreign objects: Although less common for this specific error, a foreign object could potentially interfere with internal components or connections.
- 6
If the printer has removable memory modules (DIMMs), try reseating them (with the printer off and unplugged) to ensure they are properly seated.
- 7
Attempt a firmware update (if the printer allows it and you can access the menu): Sometimes outdated or corrupted firmware can cause communication issues. Refer to your printer's manual for specific instructions.
- 8
Try booting the printer in a diagnostic or service mode (if available and you know the procedure): This can sometimes bypass initial communication checks and provide more specific error codes, but proceed with caution as incorrect actions can worsen the problem.
You should call a qualified RICOH technician if, after attempting all the DIY steps, the Error Code 79 persists. This error often points to a failing main controller board, engine board, or a complex wiring issue that requires specialized diagnostic tools and expertise. Attempting to delve deeper into internal components without proper training can lead to further damage or void your warranty. A technician can accurately diagnose the faulty board or connection and perform the necessary repair or replacement.
Find a certified printer specialist near you →$300-$800+
Actual costs may vary based on location and specialist
- • RICOH MP C3004
- • RICOH IM C4500
- • RICOH Aficio MP 4002
- • RICOH SP C840DN
- • RICOH Pro C5200S
This content is licensed under CC BY-SA 4.0 and is original educational material created by PrinterSpecialists.org. Not affiliated with RICOH.