On Konica Minolta multifunction printers (such as the bizhub series), Code 9903 generally signifies a paper transport error or jam. Specifically, the machine has detected that paper has not passed through a specific sensor within the expected time frame, or a sensor is incorrectly detecting paper when none is present.
While the exact location can vary by model, this code is most frequently associated with the Paper Ejection/Exit Section or the Automatic Document Feeder (ADF).
To understand C-9903, you must understand that modern Konica Minolta printers operate using multiple independent processors. The Main Controller Board (MFP Board) handles user data (scanning, printing, network communication), while the Video Control Board handles the rasterization and timing of laser exposure.
Code 9903 occurs when the Main Controller sends a signal to the Video board, and the Video board fails to respond within a strict time window (usually 5 seconds). The system interprets this as a "deadlock" or "freeze" and halts all operations to prevent data corruption or hardware damage.
Key technical description: Base MFP Video Watchdog timeout error.
If you are staring at a control panel displaying the dreaded "C-9903" error on your Konica Minolta bizhub or Production printer, your workflow has likely come to a screeching halt. This cryptic alphanumeric code is more than a minor glitch; it indicates a serious communication breakdown within the machine's core processing system.
In the Konica Minolta error code hierarchy, Code 9903 is classified under the "C" series (System Control Errors). Specifically, it points to a data transfer abnormality between the main controller board and the video control board—often referred to as a "Watchdog Timer" timeout.
This article provides a deep dive into the technical meaning of Code 9903, the specific models it affects, the root causes, and a step-by-step recovery strategy.
If the error occurs during printing:
There are three typical culprits:
The Konica Minolta error code 9903 (often appearing as "99-03") is a generic "trouble" or "internal error" code typically associated with a software or document processing malfunction rather than a specific hardware part failure. This error generally occurs when the machine's controller cannot process the data it has received, often due to complex file formats or driver mismatches. Common Causes of Error 9903
Complex Print Jobs: Large or highly complex files—particularly Microsoft Excel documents with multiple worksheets or variable data—can trigger 99-series codes.
Driver Conflicts: Using an incorrect or outdated printer driver is a frequent cause of processing errors.
Firmware Outdated: Older firmware versions may lack the necessary protocols to handle modern document data, leading to internal timing or processing failures.
Network Timing Issues: In some cases, the error is treated as a "99 jam," which can be caused by sensor timing issues during the pre-phase or startup. Step-by-Step Troubleshooting Guide 1. Perform a Soft Reset
Before attempting technical fixes, restart the hardware to clear temporary memory buffers.
Turn off the main power switch (usually located behind the front door or on the side). Unplug the power cable and wait for at least 60 seconds. Plug the machine back in and restart. 2. Verify and Update Drivers
Ensure you are using the official Konica Minolta driver specifically designed for your model.
Visit the official Konica Minolta Download Center to find the latest version.
If you are using a "Universal" driver, try switching to a model-specific PCL or PostScript driver. 3. Clear Internal Malfunction Settings (Service Mode)
If the error persists on the display, you may need to reset the malfunction status through the service menu. Warning: This should ideally be performed by a technician.
Access the Service Mode (usually by pressing Counter > Display Keypad > Stop > 0 > 0 > Stop > 0 > 1). Select System 1. Navigate to Initialization and select Trouble Reset. Follow the prompts to restart the machine. 4. Check Firmware Version konica minolta code 9903
Konica Minolta often releases firmware patches to address specific 99-series errors. Ensure your machine is running at least version G00-RF or newer, as these versions contain stability fixes for data processing. 5. Analyze the Source Document
If the error only occurs with specific files, try the following:
Print as Image: In the PDF or document print settings, select "Print as Image" to bypass complex vector processing.
Simplify Excel Files: If printing from Excel, try printing one worksheet at a time or saving the file as a PDF before printing. When to Call a Technician
If these steps do not resolve the issue, the problem may lie with the Image Stabilization process or the IDC sensors (1 and 2). A certified technician can check the "level history" of these sensors or adjust the transport speed and registration loop to fix permanent timing errors.
For further assistance, you can find local support through the Konica Minolta Service Locator.
Does this error occur consistently on every print job, or only when you try to print specific types of files?
Error code on Konica Minolta devices typically indicates an internal software or processing error, often related to the machine's inability to handle specific file data or a mismatch in firmware/driver versions. Primary Troubleshooting Steps
To address this code and restore proper functionality, follow these steps: Update Firmware
: Ensure your device is running the latest firmware (specifically version G00-RF or newer
), as this version includes fixes for recurring processing errors. Driver Verification
: Confirm that you are using the correct and most up-to-date printer driver for your specific model and operating system. Isolate Problematic Files
: This code can be triggered by complex files (e.g., MS Excel spreadsheets with many worksheets or variable data). Try printing a simple PDF to see if the error persists. Perform Image Stabilization : Manually run an Image Stabilization
cycle from the machine's Utility menu to clear any temporary processing hangs. Hard Reset
: Turn the main power switch off, wait at least 30 seconds, and turn it back on to clear the internal buffer. Advanced Maintenance If the error remains after a reset and update: Check IDC Sensors
: Inspect the level history for IDC sensors 1 and 2 in the service mode to ensure they are positioning correctly. Inspect Hardware Components
: Check the condition of the drums, developer units, and the transfer belt for any physical wear that might trigger a system-wide "99" series code. Service Mode
for your particular Konica Minolta model to check those sensor levels?
The Konica Minolta error code 9903 is a generic "99" series internal system error typically encountered on newer bizhub i-Series models like the C250i, C300i, and C360i. This code often indicates a sensor timing issue or a data processing conflict that prevents the machine from reaching a "Ready to Print" state. What Causes Error Code 9903?
Unlike specific mechanical codes (like "C" codes for motor failures), code 9903 is often related to the way the machine handles data or timing during its stabilization phase. Common triggers include:
Sensor Timing Issues: Internal sensors, particularly the IDC (Image Density Control) sensors, may fail to report data within the expected timeframe. On Konica Minolta multifunction printers (such as the
Complex Data Files: Large MS Excel files with multiple worksheets or variable data can occasionally trigger "99" series internal errors.
Firmware Mismatch: Outdated firmware (older than version G00-RF) is a frequent culprit for persistent 9903 codes.
Imaging Unit Issues: Deteriorated drums, developers, or transfer belts can cause the machine to fail its internal image stabilization process. Step-by-Step Troubleshooting for Error 9903
If you see this code on your bizhub display, follow these steps to resolve it: 1. Perform a "Trouble Reset"
This is the standard first step for clearing non-mechanical internal errors. Turn the main power OFF.
Press and hold the Utility/Counter button (or the yellow Reset button on some models) while turning the power back ON.
Continue holding until a black dot appears in the top right corner of the screen.
Select Trouble Reset from the menu, wait for the "OK" message, and then restart the machine. 2. Update System Firmware
If the error recurs, check your firmware version. Service technicians recommend updating to at least version G00-RF or newer to stabilize system timing and data handling. 3. Run Image Stabilization Manually
A 9903 code appearing during the "pre-phase" (before the machine is ready) suggests a stabilization failure. Enter Service Mode. Navigate to Imaging Process Adjustment.
Select Stabilization and run the routine manually to check for associated "P" codes (which indicate specific sensor failures). 4. Verify Print Drivers and Files If the error occurs only when printing specific documents: Ensure you are using the latest Konica Minolta drivers.
Try printing the file as an image or simplifying complex Excel spreadsheets. Maintenance Tips to Prevent Code 9903
Clean the Sensors: Regularly clean the IDC sensors and the print head glass to ensure the machine can accurately read image density.
Use High-Quality Paper: Damp or low-quality paper can cause micro-delays in paper transport, leading to timing errors.
Monitor Consumables: Replace drum units and transfer belts as they reach the end of their life cycle to prevent image stabilization failures.
This code is formally classified as a "Controller JAM (Image Processing)" error. Unlike a physical paper jam where a sheet is stuck in a roller, this is a sequence jam. It occurs when the machine’s internal controller fails to complete the image stabilization process before it starts a new print or copy job.
Primary Symptoms: The printer stops immediately, and the message "Controller JAM" or "Image Processing Error" appears on the touch panel.
Device Impact: It effectively blocks all printing and copying functions until the sequence is reset. Common Causes
While it sounds like a software glitch, it is often triggered by physical environmental factors:
Paper Quality: Using damp, curled, or low-quality paper can prevent the sensors from detecting the paper's position correctly during the pre-print stabilization.
Sensor/Actuator Malfunction: Dirty or misaligned sensors, or "actuators" that don't move smoothly, can interrupt the timing sequence the controller expects. If the error occurs during printing: There are
Media Settings: The device may be trying to process a paper size that doesn't match what is actually in the tray. How to Fix It
Clear the Sequence: Open and then close the front door of the machine. This often forces the controller to re-attempt the stabilization process.
Toggle Power: If the door trick fails, turn the main power switch OFF, wait 10 seconds, and turn it back ON.
Inspect the Paper: Replace any paper that feels humid or appears wavy. Ensure the paper guides in the tray are snug against the stack.
Cleaning: If the error persists, a technician may need to clean the paper path sensors or check the black developer chip. Review Summary
The 9903 code is more of a procedural "hiccup" than a hardware failure. It is frustrating because it doesn't always point to a specific piece of stuck paper, but it is generally easy to resolve with a simple door cycle or by using fresh, dry paper. If you're dealing with this right now, let me know: What model of bizhub are you using?
Did the error happen during a large print job or right at startup? Have you tried swapping the paper yet?
I can give you more specific steps based on your model's service manual. Common Konica Minolta Printer Problems & How to Fix Them
In Konica Minolta bizhub devices, Error Code 9903 is typically classified as a Sequence Jam. Unlike standard paper jams that indicate a physical obstruction you can easily see, sequence jams often stem from sensor timing issues where the machine detects paper in a certain area too early or too late based on its internal logic. Understanding the 9903 Code
Classification: It is often grouped with "99 codes," which are generally software or timing-related rather than simple physical jams.
Timing Failures: The machine’s internal "Pickup Feed System" expects a sheet of paper to pass a specific sensor within a millisecond-perfect window. If it misses this window, it triggers code 9903.
Startup Errors: Users often report this code appearing during the "pre-phase" when the machine is first turned on, even before a print job is sent. Primary Causes
Software & Firmware: Outdated firmware (older than version G00-RF) or incorrect printer drivers can cause miscommunication between the machine's brain and its mechanical components.
Complex File Types: Printing large or complex files (like MS Excel sheets with variable data and multiple worksheets) can sometimes overwhelm the processor, leading to timing errors.
Sensor Dirtying: Dust on the IDC sensors (Image Density Control) or exit level sensors can cause the machine to "lose track" of the paper's position.
Mechanical Wear: Issues with the drums, developer units, or transfer belt can lead to poor "image stabilization," which the printer may interpret as a sequence error. Troubleshooting and Fixes If you encounter this code, try these steps in order:
Perform a Hard Reset: Turn the main power switch OFF (usually located inside the front door), wait 10 seconds, and turn it back ON. This can often clear temporary software glitches.
Update Firmware: Contact a certified technician to ensure your machine is running the latest firmware (specifically version G00-RF or newer), which includes fixes for common 99-series errors.
Clean the Sensors: Gently clean the IDC sensors and the feed rollers using a lint-free cloth and isopropyl alcohol to ensure accurate paper tracking.
Check Drivers: Ensure you are using the official Konica Minolta driver for your specific model rather than a generic Windows print driver.
Service Mode Initialization: If the error persists, technicians often use the Service Mode (Utility/Counter > Stop > 0 > 0 > Stop > 0 > 1) to "Initialize" the system and clear persistent error flags.
Note: 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 all else fails—the error appears on copy jobs, memory tests pass, firmware is current, and you’ve swapped DIMMs—the MFP Board (p/n A5C7H02300 for the C224e series) is likely failing.