Vertical banding appears only in black & white documents, not color. Likely cause: The iPL algorithm for monochrome masking has desynced. Fix: Run a "Bi-D Adjustment" via the Maintenance Manager (requires service mode).
If you have ever dug into the service diagnostics of an older Epson WorkForce or business inkjet MFP, you may have stumbled across the cryptic acronym: MFP-iPL . epson mfp-ipl
The printer stops mid-page and the screen freezes. Likely cause: The iPL renderer encountered an unsupported vector object (rare in PDF 1.3). Fix: Flatten the PDF to an image before printing. Vertical banding appears only in black & white
Disclaimer: This post is for educational purposes regarding legacy hardware. Epson no longer actively supports the iPL architecture in new consumer products. epson mfp-ipl
