Oki C9800 Series Service & Troubleshooting Manual

Also see for C9800 Series: Specifications User guide Manual Safety and regulatory information Regulatory and safety information

Contents

Oki C9800 Series Service & Troubleshooting Manual Manual pdf 55 page image

Light Print in Only One ColorOnly one color; yellow, magenta, cyan, or black, is too light on the printed image.Initial Actions to Perform Perform Initial Actions from Print Quality Troubleshooting Practices Verify that color calibration has been performed prior to using this troubleshooting procedure. Check that the Toner Cartridge pull strip is completely removed from the affected color.Areas of the Printer that Apply to Light Print in Only One Color Imaging Unit LED Head Engine Control Board Toner SupplyTroubleshooting Steps Resolution1. Verify all packaging material has been removed form the toner cartridges Yes – Go to Step 2No - Remove packing material2. Print the 100% Solid Fill test print. Can the problem be isolated to one primarycolor?Yes – Go to Step 3No - "Light Print in Only OneColor"3. Remove the Toner Cartridge and check for toner starvation in the Imaging Unit.Is there evidence of toner starvationYes – Replace the Toner CartridgeNo - Go to Step 44. Remove the Imaging Units and the Transfer Unit and check for tonercontamination on the high voltage contacts. Are the contacts contaminated?Yes – Clean the contactsNo - Go to Step 55. Are the LED Heads dirty? Clean the heads with a clean, lint-free cloth. Did thiscorrect the problem?Yes – CompleteNo - Go to Step 66. Swap the LED Head of the problem color with any other LED Head.Print a Solid Fill Test Pattern. Has the problem moved with the LED Head?Yes – Replace the LED HeadNo - Go to Step 77. Are the wiring harnesses on the LED Heads undamaged, properly routed andseated?Yes – Reseat the wiring HarnessesNo - Replace in the followingorder: Transfer Unit / LVPS /Engine Control PCB