mypros+
Error code reference

Samsung Multifunction Printer Error Code #02-003

Communication error of the MEGA88 Micom.

Samsung codesSamsung multifunction printer codes

Communication error of the MEGA88 Micom.

First step from the service manual

Open the side cover and close it. Check the envelope pressing device.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for #02-003.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What #02-003 means on a Samsung multifunction printer

The Samsung #02-003 error code indicates a communication failure involving the MEGA88 Micom, a microcontroller unit responsible for coordinating control signals between the printer's mechanical assemblies and the main control board. The MEGA88 Micom manages low-level hardware functions, and when its communication link is interrupted or corrupted, the printer cannot reliably coordinate print operations. This type of communication error typically points to a disruption in the data pathway between the Micom and other system components rather than a full hardware failure.

One of the most common triggers for this error is an improperly seated or open side cover. The printer's interlock switches detect cover position and can interrupt communication signals when the cover is not fully closed or latched. Similarly, the envelope pressing device, which is referenced in the first diagnostic step, can cause mechanical interference or signal disruption if it is misaligned, stuck, or not seated correctly in its operating position.

If the error persists after confirming the side cover is fully closed and the envelope pressing device is properly positioned, the fault may lie in the wiring harness connecting the Micom to the main board, a failing interlock switch, or a defective Micom component itself. Inspecting connector seating and checking for visible damage to the wiring between the side cover assembly and the control board are the appropriate next steps before considering component replacement.

Source: manufacturer service documentation.

Common causes of #02-003

  1. 01

    Side cover not fully closed or latched

    Wiring / connection

    If the side cover is ajar even slightly, the interlock switch may interrupt the Micom communication circuit. Open and firmly close the side cover to confirm it is fully seated.

  2. 02

    Envelope pressing device misaligned or improperly seated

    Wiring / connection

    The envelope pressing device can mechanically or electrically interfere with Micom communication if it is out of position. Inspect the device and reseat it according to its intended position.

  3. 03

    Faulty or dirty interlock switch on side cover

    Part replacement

    The interlock switch that detects side cover closure can fail or become contaminated, causing the printer to register an open-cover condition even when closed. Testing switch continuity will confirm whether it is functioning correctly.

  4. 04

    Loose or damaged wiring harness to MEGA88 Micom

    Wiring / connection

    A connector that has worked loose or a harness with visible wear or damage between the side cover assembly and the control board can interrupt the Micom communication signal. Inspect all connectors in the path for secure seating.

  5. 05

    Defective MEGA88 Micom or control board

    Part replacement

    If all mechanical and wiring checks pass without clearing the error, the Micom itself or the board it resides on may have failed. This requires component-level diagnosis and likely board replacement.

See the test procedure for each cause

Frequently asked questions about #02-003

What does #02-003 mean on a Samsung multifunction_printer?
Error #02-003 indicates a communication error with the MEGA88 Micom, a microcontroller that manages communication between the printer's mechanical components and its main control board. The error signals that this communication link has been interrupted or has failed. The first recommended step is to open the side cover and close it firmly, then check the envelope pressing device for proper positioning.
How do I fix the #02-003 error on my Samsung printer?
Start by opening the side cover completely and closing it firmly to ensure the interlock switch registers it as fully shut. Next, inspect the envelope pressing device to confirm it is properly seated and not obstructed. If the error clears after these steps, the issue was likely a mechanical seating problem. If the error persists, further inspection of the wiring harness and interlock switch will be needed.
Will resetting my Samsung printer clear the #02-003 error?
A simple power cycle or reset may temporarily clear the error display, but it will likely return if the underlying cause is not resolved. If the side cover interlock or envelope pressing device is the root cause, physically correcting that issue is necessary for the reset to hold. Persistent recurrence after resets points to a wiring, switch, or Micom hardware problem that requires hands-on diagnosis.
Is it safe to continue using my Samsung printer with a #02-003 error?
It is not recommended to continue operating the printer while this error is active, as the Micom communication failure means the printer cannot properly coordinate its mechanical functions. Attempting to print in this state could result in paper jams, incomplete operations, or further component stress. Resolve the error before resuming normal use.
How much does it cost to repair a #02-003 error on a Samsung printer?
If the fix is simply reseating the side cover or repositioning the envelope pressing device, there is no parts cost involved. If the interlock switch needs replacement, parts and labor costs are typically in the range of $20 to $75. A defective control board or Micom component replacement is more involved and could range from $80 to $200 or more depending on part availability and labor rates.

Related Samsung multifunction printer codes

All Samsung multifunction printer codes
View all 59 Samsung multifunction printer codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass