How to resolve color shift issues on the Konica Minolta C364e printer

If the Konica Minolta C364e printer experiences color shift issues when printing color documents, we can take the following steps to troubleshoot and resolve the issue based on the printer’s characteristics and related troubleshooting cases:

1. Hardware Cleaning and Maintenance

△ Laser Cleaning

Remove the laser assembly and carefully inspect the glass surface for any colloid or dust. If so, use a non-woven cloth and a dedicated cleaning agent to gently wipe the glass and cable connectors to ensure there is no residue. Also, clean the polygonal mirror inside the laser to prevent dust from causing abnormal light scattering.

△ Transfer Belt Inspection

Carefully inspect the red portion of the transfer belt for residue. If the red scraper is not completely cleaned while other colors are normal, clean the transfer belt or inspect the red toner cartridge assembly for leakage.

△ Toner Cartridge and Developer Assembly

Consider replacing the red toner cartridge or developer cartridge to test whether the abnormal red output is due to aging of the drum frame or leakage in the charging roller. Additionally, check the red developer hopper’s carrier level and toner supply. If the hopper is clogged, thoroughly clean the auger and toner path.

2. Color Calibration and Settings Adjustment

△ TCR Toner Density Calibration

First, perform TCR toner density calibration. Enter maintenance mode (usually accessed via the Stop 00 Stop 01 keys), then select [Imaging Processing Adjustment] > [TCR Toner Supply]. Here, you can force toner replenishment and observe whether the red toner density gradually returns to approximately 6%.

△ Printer Driver and Color Configuration

Make sure the printer driver is updated to the latest version. Also, check if the color profile is incorrectly set to “Grayscale” or “Toner Save Mode.” In Printing Preferences, enable the “Auto Color Correction” feature or manually adjust the CMYK color balance as needed.

3. Consumables and Sensor Inspection

△ Waste Toner Box Status

First, pay attention to the waste toner box’s condition. Check the waste toner box’s sponge for signs of aging and leaking toner. Waste toner accumulation can contaminate the laser or transfer unit, affecting print quality. If such problems are detected, replace the waste toner box promptly.

△ Sensor Cleaning

Perform sensor cleaning. Regularly clean key components such as the ITB (transfer belt) sensor and TD sensor (developer assembly) to ensure accurate detection and avoid false positives (e.g., PPP22), thereby ensuring accurate color output.

4. Professional Service Support

If color deviation issues persist after performing the above steps, we recommend contacting an official or authorized service provider for further support. These service providers typically offer comprehensive services, including toner cartridge replacement, deep cleaning, and equipment rental, to ensure your printing device is restored to normal operation and eliminate color issues such as red deviation.