Error Code C0002 is a Paper Feed Communication Error on Konica Minolta bizhub machines. It fires when the main control board detects a communication failure while receiving data from the paper feed/transport drive board — meaning the two boards that control paper feeding have lost the ability to talk to each other correctly.

Unlike many bizhub error codes that point directly to a specific mechanical component, C0002 is a board-to-board communication failure. The paper jam has not occurred yet — the machine is detecting that its own internal communication infrastructure is broken before any feed motion has even been attempted. This makes the diagnostic approach quite different from typical mechanical paper feed errors.

C0002 Has Two Different Meanings Depending on Model Family

This is the most important thing to understand before starting diagnosis. C0002 maps to different board combinations depending on your model — and the remedy differs significantly between them:

What Does Error Code C0002 Mean?

The bizhub paper feed system is not controlled by a single board. On most models, the main control board (PRCB or MFPB) handles high-level machine logic and communicates over a serial or parallel data bus with one or more dedicated paper feed boards (PFTDB, PCCB) that directly control paper feed motors, tray lift motors, and position sensors.

This communication happens continuously during operation. Every time a print job starts, the main board sends commands to the feed board and expects to receive status data back. C0002 fires when this two-way data exchange breaks down — the main board is trying to receive data from the feed board but the response is not arriving correctly or at all.

The breakdown can occur at several points:

• The communication harness between the boards is damaged or disconnected — a loose connector, a pinched harness, or physical wire damage breaks the data link
• The firmware on one or both boards has a bug or corruption — a firmware mismatch between the main board and the feed board causes the protocol to fail, even when all physical connections are intact
• An ICP (inline circuit protector) in the communication power path has blown — power to the feed board or its communication circuit is interrupted by a blown ICP, causing the board to stop responding
• The feed board (PFTDB or PCCB) has failed — the board cannot maintain reliable communication due to a hardware fault
• The main control board (PRCB or MFPB) has failed — the board’s communication controller has a fault on its side of the data link

Common Causes of Error Code C0002

• Transient power event — the most common cause of a single C0002 occurrence. A power fluctuation, brief interruption, or voltage spike during startup corrupts the communication handshake. A proper power cycle (full disconnect for 10+ seconds) clears this without any repair needed
• Firmware version mismatch or corruption — the second most common cause of persistent C0002. The PRCB/MFPB firmware and the PFTDB/PCCB firmware must be compatible versions. An incomplete firmware update, a failed firmware write, or installing a replacement board with a different firmware version than expected can cause persistent C0002 that resists all other fixes
• Loose or damaged communication harness connector — the connector between the main board and the PFTDB or PCCB has worked loose, especially after a PM visit or board replacement. The data lines are interrupted at the connector
• PCCB connector fault when optional paper unit is installed (PC-110/PC-210/PC-410) — the inter-unit connector between the main machine body and the PC control board inside the optional paper cabinet is not making reliable contact. This is consistently the most common hardware cause of C0002 on C224/C284/C364 family machines with optional paper units attached
• Blown PFTDB ICP3 (654/754 family) — an inline circuit protector on the PFTDB that powers the communication circuit has blown, causing the board to stop responding
• Blown PRCB ICP16 (654/754 family) — the corresponding ICP on the PRCB side of the communication link has blown
• Blown MFPB F4E fuse (8-series models) — an inline fuse on the MFPB feeding the PCCB communication circuit has blown on C258/C308/C368/C458/C558/C658 family machines
• Failed PFTDB or PCCB — the feed control board has a hardware fault that prevents reliable communication
• Failed PRCB or MFPB — the main board’s communication controller has failed

Step-by-Step Troubleshooting Procedure

Step 1 — Perform a Proper Full Power Cycle

C0002 is a Rank C error on most models, meaning a single transient occurrence is expected to clear itself with a proper power cycle. This is always the first step — and it resolves the majority of C0002 occurrences that field technicians encounter.

1. Press the main power switch to OFF
2. Disconnect the power cord from the wall outlet — this is critical. Simply pressing the power button is not sufficient for a proper power cycle. The internal capacitors must discharge
3. Wait a full 10 seconds minimum (30 seconds is better) before reconnecting
4. Reconnect the power cord to the wall outlet
5. Wait another 5 seconds, then press the main power switch to ON
6. Observe the startup sequence — if C0002 does not return and the machine reaches ready status, the event was transient. Test all tray functions by sending a print job from each tray
7. If C0002 returns on the next startup or within the next few print cycles, proceed to Step 2

Step 2 — Verify and Update Firmware

Persistent C0002 that returns after a proper power cycle is one of the most firmware-sensitive errors on the bizhub platform. Before touching any hardware, verify the firmware version and update if needed — this resolves a significant number of persistent C0002 cases without any physical intervention.

1. Enter Service Mode (if accessible despite the error) and navigate to Machine Information → Firmware Version — note the current engine firmware version for your model
2. Contact your Konica Minolta distributor or check the service portal for the latest available firmware for your specific model
3. If the machine is not on the latest firmware version, perform a firmware update:
   • Download the correct firmware package for your exact model
   • Follow the standard firmware update procedure for your model family (typically via USB drive to the front USB port)
   • Ensure the update completes fully without interruption — an interrupted firmware write can cause or worsen C0002
4. After the firmware update, power cycle fully (disconnect power cord, wait 10 seconds, reconnect) before testing
5. If C0002 persists after a confirmed successful firmware update to the latest version, the issue is hardware — proceed to Step 3

Step 3 — Check and Reseat the Communication Harness Connectors

Use the model-specific references below to locate and reseat the correct connectors for your machine.

For bizhub C224 / C284 / C364 family (with PC-110 / PC-210 / PC-410 paper unit installed):

1. Power OFF and unplug the machine
2. Locate the inter-unit connector between the main machine body and the paper cabinet — this is where the PCCB inside the paper cabinet connects to the main body harness
3. Reseat the connectors at PCCB CN1 and CN2 (the main communication connectors between the paper cabinet and the machine body)
4. After reseating, verify the following voltages at CN2 and CN1:
   • 24VDC on CN2 pin 2 — main power to PCCB
   • 5VDC on CN2 pin 13 — logic power to PCCB
   • 3.3VDC on CN1 pin 11 — communication voltage
5. If any of these voltages are absent, trace the harness back toward the main board to find the break in the power or communication path
6. If all voltages are present after reseating and C0002 still persists, the PCCB itself has failed — proceed to Step 6

For bizhub C224 / C284 / C364 family (no optional paper unit — base machine only):

1. Power OFF and unplug the machine
2. Reseat all connectors on the PRCB — particularly those connecting the PRCB to the paper feed motor harnesses and the internal paper feed control circuit
3. Check for any visible harness damage, pinching, or pulled-out wires in the paper feed area

For bizhub C258 / C308 / C368 / C458 / C558 / C658 / 308e / 368e / 458e / 558e / 658e (when PCCB installed with optional paper unit):

1. Power OFF and unplug the machine
2. Locate the harness between the PCCB (inside the optional paper cabinet) and the MFPB
3. Reseat all connectors in this path — both the inter-unit connector between the paper cabinet and the machine body, and the connector at the MFPB end
4. Inspect all pins for damage, oxidation, or bent contacts

For bizhub 654 / 654e / 754 / 754e / C654 / C754 (PFTDB models):

1. Power OFF and unplug the machine
2. Locate the PFTDB (Paper Feed/Transport Drive Board) — this is a dedicated board separate from the PRCB, typically mounted in the lower section of the machine near the paper feed assembly
3. Reseat the communication harness connector between the PFTDB and the PRCB
4. Inspect the full length of the harness for damage — kinked, pinched, or abraded wires in this harness are a common cause of C0002 on these models

Step 4 — Check ICP Continuity (Model Dependent)

A blown ICP (Inline Circuit Protector) in the communication power path silently cuts power to the feed board or its communication circuit. The board stops responding and C0002 fires on every startup — and this fault will not respond to firmware rewrites or connector reseating.

For bizhub 654 / 654e / 754 / 754e / C654 / C754:

1. Access the PFTDB and locate ICP3 on the board — refer to your service manual for the exact component location
2. Test ICP3 continuity with a multimeter in continuity mode — no continuity (open circuit) confirms ICP3 has blown
3. Also access the PRCB and locate ICP16 — test the same way
4. A blown ICP requires board-level repair or replacement of the affected board
5. Before replacing the board, investigate what caused the ICP to blow — a short circuit in the harness or a failed board on the other end of the communication link can cause repeated ICP failures

For bizhub C258 / C308 / C368 / C458 / C558 / C658 / 308e / 368e / 458e / 558e / 658e:

1. Access the MFPB and locate fuse F4E
2. Test F4E continuity — no continuity confirms the fuse has blown
3. A blown F4E requires MFPB board-level repair or full MFPB replacement

Step 5 — Inspect the Communication Harness for Physical Damage

If connectors are confirmed seated and ICPs are intact but C0002 persists, inspect the full length of the communication harness between the boards for physical damage that is not visible at the connector ends.

1. Trace the harness from the PFTDB/PCCB to the PRCB/MFPB
2. Look for: harness pinched behind panels or covers during a previous service visit, wires abraded by contact with sharp metal edges in the machine frame, connectors that appear seated but have cracked housings allowing pin movement under vibration, visible damage where the harness bends around corners in the paper feed assembly
3. On 654/754 series, the harness between the PFTDB and PRCB runs through a complex routing path — check every routing clip and grommet for pinch points
4. Replace any damaged harness section — do not attempt to splice or repair communication harnesses as this introduces impedance mismatches that cause intermittent errors

Step 6 — Replace the PFTDB or PCCB

If the firmware is confirmed current, connectors are confirmed seated, ICP continuity is confirmed, and the harness is confirmed undamaged — the paper feed drive board itself has a hardware fault and must be replaced.

For bizhub 654 / 754 / C654 / C754:

1. Replace the PFTDB (Paper Feed/Transport Drive Board)
2. After installation, reseat all harness connectors to the new board and confirm all connectors are fully seated
3. Perform a full power cycle and test all tray functions
4. Update the PFTDB firmware if the replacement board has different firmware than the PRCB expects

For bizhub C224/C284/C364 family and 8-series models with optional paper unit (PC-110/PC-210/PC-410/PC-415 etc.):

1. Replace the PCCB (PC Control Board) inside the optional paper cabinet
2. After installation, reseat all inter-unit connectors and verify the voltage references at PCCB CN1 and CN2 are present
3. Perform a full power cycle and test paper feed from all trays

Step 7 — Replace the PRCB or MFPB

Main board replacement is the last resort for C0002. Only consider this after a confirmed-good PFTDB/PCCB, confirmed-good harness, confirmed-intact ICPs, and correct current firmware still produce C0002 persistently.

• PRCB — for bizhub C224/C284/C364 family (base machine without optional paper unit), C454/C554, 654/754, C654/C754
• MFPB — for bizhub C227/C287/C367, C258/C308/C368, C458/C558/C658, 308e/368e/458e/558e/658e

Quick Reference — Troubleshooting by Symptom

Understanding Why Firmware Is So Important for C0002

C0002 is unusual among bizhub error codes because firmware plays a larger role in its resolution than in almost any other error. Here is why:

The communication protocol between the PRCB/MFPB and the PFTDB/PCCB is implemented in firmware on both boards. If the protocol version on one board does not match the version expected by the other board, the handshake fails even when the physical connection is perfect. This is why:

• C0002 sometimes appears after a replacement board is installed — the new board may have older firmware that is incompatible with the current firmware on the other board
• C0002 sometimes resolves simply by updating to the latest firmware — a firmware bug in an earlier version caused incorrect protocol handling that was fixed in the update
• C0002 can appear after a power interruption during a firmware update corrupted the firmware on one board

This is why the official service manual remedy lists firmware rewriting as Step 2 — before any connector checks and before any board replacement. In field practice, firmware-related C0002 events are resolved by a firmware update faster and at lower cost than any hardware repair.

Preventing C0002 From Recurring

• Always keep firmware current — outdated firmware is the leading preventable cause of persistent C0002. Check the firmware version during every PM visit and update when a new version is available from Konica Minolta
• Inspect and reseat the PCCB inter-unit connector at every PM visit on machines with optional paper units — this connector is the most frequent hardware cause of C0002 and is disconnected every time the paper unit is removed for service. A 30-second reseat during PM prevents the most common hardware-related C0002 calls
• Ensure clean power supply — machines on unstable power circuits, shared with heavy equipment, or connected via long extension leads experience more transient C0002 events. A dedicated circuit and a quality surge protector significantly reduce the frequency of transient communication errors
• Never interrupt a firmware update in progress — an interrupted firmware write is one of the most reliable ways to produce persistent C0002. Always ensure the machine has stable power during firmware updates and never power off during the write process
• After any board replacement, immediately update the firmware — replacement boards often ship with older firmware. Installing a new PFTDB, PCCB, PRCB, or MFPB without immediately updating the firmware to match the rest of the machine is a common cause of post-repair C0002

Professional Technician Summary

Error Code C0002 on Konica Minolta bizhub machines is a paper feed communication error, and its resolution path is fundamentally different from any other paper feed error code on the platform — because it is not a mechanical failure but a communication failure between boards.

A single C0002 occurrence is almost always a transient event that clears with a proper power cycle (full disconnect for 10+ seconds). Do not immediately replace hardware on a machine that has produced C0002 once.

Persistent C0002 that returns after every power cycle should be addressed with a firmware update before any hardware replacement. Firmware-related C0002 events are common across all model families and are resolved faster and at lower cost by a firmware rewrite than by replacing boards.

When firmware is confirmed current and C0002 persists, the diagnostic priority is: inter-unit connector (particularly PCCB CN1/CN2 when an optional paper unit is installed) → ICP continuity check → harness inspection → PFTDB/PCCB replacement → PRCB/MFPB replacement as the final step.