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My Konica Minolta bizhub C750i is putting a light gray film over every copy and print. I have already run the standard maintenance utilities, cleaned the optics, and reset the image units, but nothing cleared the tint. I need a technician who knows this model inside-out to diagnose the root cause—whether it is a drum, developer, transfer belt, firmware, or calibration problem—and restore clean, neutral output. You will need to work on-site, bring the appropriate Konica diagnostic software and calibration tools, and be comfortable swapping or refurbishing consumables if required. Once the fix is applied, please run color and grayscale test charts, print multiple originals, and confirm the issue is completely resolved before closing the call. Deliverables: • Fault identified and corrected • Verification prints showing no gray background • Brief service report outlining the steps taken and any parts used If you have recent experience servicing the bizhub C750i (or similar C650i/C550i series) and can schedule a visit soon, let’s set up a time.
Project ID: 40514027
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2 freelancers are bidding on average $105 USD for this job

Hi, I can help diagnose and resolve the light gray background issue on your Konica Minolta bizhub C750i. I have experience working with similar bizhub models and can check all likely causes including drum/developer units, transfer belt, calibration, and density settings. I’ll perform on-site testing, run diagnostic checks, replace or adjust any faulty consumables if needed, and verify the fix using test prints to ensure clean, neutral output. Happy to schedule a visit at your convenience. Best regards, Muhammad
$180 USD in 2 days
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I specialize in system design, programming, integration, and troubleshooting for industrial automation projects, with careful Firmware diagnostics for gray-tint root causes. Before scheduling the visit, has the gray background appeared equally on all paper trays and both color and monochrome prints, or does it change with media source or print mode? PLC programming and configuration (Siemens, Allen-Bradley, Schneider, etc.) Design and implementation of control logic and HMI interfaces, including calibration workflows and controlled verification prints. Integration with sensors, actuators, and other industrial equipment, applying Technical Support discipline to on-site fault isolation. System testing, debugging, and optimization for clean neutral output after drum, developer, transfer, or calibration correction. Documentation, including electrical schematics, PLC logic diagrams, and user manuals, plus concise Technical Documentation for service actions and parts. On-site support and commissioning (if required) - Anastasiia
$30 USD in 2 days
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San Bruno, United States
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