Konica Minolta bizhub C450i / C550i / C650i: Clear Service-Call Errors with a 60-second Trouble Reset

Nothing derails a busy office faster than a bizhub flashing a cryptic C-code and refusing to print. Before you assume a fuser meltdown or call in a technician, there’s a built-in “Trouble Reset” that clears most lockouts—no parts, no screwdriver, just a simple power-on key press the service manual hides deep in Chapter 16. This guide walks you through that 60-second reset for the Konica Minolta bizhub C450i, C550i, and C650i, explains why the error appeared, and shows the preventative tweaks—firmware, cleaning, timely consumable changes—that keep the code from coming back. Read on to get your i-Series back to Ready and keep your team moving.

A Trouble Reset is a built-in recovery feature that clears active C-codes, lifts the safety lockout that stops printing, and keeps all page counters and consumable meters intact. It is the first-line remedy technicians try before replacing parts because it restores normal operation without altering the machine’s usage data.

Most resets are triggered by error codes such as C3102 for fuser over-temperature, C3901 for the scanner’s home-position failure, or false paper-jam detections that the sensors misread. When any of these conditions occur, the printer shuts itself down and displays a service call message until the error is cleared.

After performing the reset, watch the control panel closely. If the same code returns immediately, the fault is likely mechanical or electronic, not a one-time glitch. At that point, professional service or a replacement part is the safer solution than repeating the reset procedure.

A Trouble Reset removes only the temporary error log, keeping your address book, stored jobs, color profiles, and life counters intact. Before opening any covers, turn the printer off at the main power switch and wait ten seconds for voltages to discharge. If you must lift the key cover to press the reset switch, ground yourself first—static discharge can damage the board.

1. Power OFF the main switch (rear left).
2. Remove the small plastic key cover beneath the control panel.
3. Press and hold the yellow “Reset” tact switch on the engine board.
4. While holding the switch, power ON the printer.
5. When “Trouble Reset” appears on-screen, release the switch and tap [Trouble Reset] → [OK].
6. Power OFF, wait 10 s, power ON—machine should boot to Ready state.

• Verify the C-code history is cleared in Service Mode → Counter → Error Log.
• Print a configuration page to ensure network settings and page counts remain intact.
• Check consumable life counters; they do not reset with this procedure.

Schedule a thorough cleaning of the toner filters and laser windows every quarter, and keep the machine’s firmware updated to the latest i-Series build because many nuisance C-codes are fixed in newer releases. At the same time, monitor the remaining life of the fuser and transfer belt—resetting a worn fuser may clear an error temporarily, but it won’t prevent performance issues or future shutdowns.

A 60-second Trouble Reset clears most bizhub C450i / C550i / C650i C-codes, but lasting uptime comes from proactive care. Clean toner filters and laser windows every quarter, keep firmware current, and track fuser and belt life to stop repeat errors. For detailed guidance and quality parts, download Item Inc.’s service and parts manuals along with our growing library for all major brands. With the right resources, your printers stay ready and your workflow uninterrupted.

Access Item, Inc.’s complete service and parts manuals for the Konica Minolta bizhub C450i / C550i / C650i, along with our expanding library of technical guides for HP, Canon, Lexmark, and other major brands—all ready for instant download.