Konica Minolta | Code 9903

Konica Minolta Code 9903: Causes, Troubleshooting, and Permanent Fixes

5. Overheating or Power Supply Instability

If the low-voltage power supply (LVPS) outputs unstable 3.3V or 5V DC, the video processor may intermittently reset. Similarly, blocked cooling fans causing the main controller to overheat can trigger false watchdog errors.

9. Case studies / example scenarios

• Scenario A — Firmware update induced 9903: After firmware update, device failed to boot with 9903. Technician reflashed factory firmware, verified checksum, and reinitialized device; issue cleared.
• Scenario B — HDD failure: 9903 occurred along with boot failures; removing HDD allowed successful boot; replacing HDD and restoring settings resolved problem.
• Scenario C — Intermittent power issue: 9903 after power blips; installing UPS and replacing power supply fixed recurring error.

How to Fix Code 9903

The solution is straightforward and does not require a service call in most cases: konica minolta code 9903

1. Access Service Mode

   • Press Menu → Counter (or Stop 0 0 Stop 0 1 depending on model—verify per device).
   • Enter the 8-digit service password (default often 9272927292729272 or 00000000 for older models; consult your administrator).

2. Navigate to Log Settings

   • Go to Service Mode → System 2 → Job Log Auto Delete Setting.

3. Manually Clear the Log

   • Select Job Log Auto Delete → Set to Delete → Execute.
   • Confirm deletion. The code should clear instantly.

4. Restart the MFP

   • Power cycle the device to reset the job management subsystem.

⚠️ Note: Deleting job logs removes historical usage records. If you need them for accounting/auditing, export logs via PageScope Net Care or Web Connection before clearing. Scenario A — Firmware update induced 9903: After