Update firmware to the latest version. For example, make sure firmware is at EC6 (LW60.xx.P632) or EC6.1 (LW61.xx.P634), and engine code is at FDN.PIR.E636. | Set engine setting 9 to 2 (decimal). From the control panel: ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Boot into the Diagnostics Menu. a. Turn the device off. b. Hold down both 3 and 6 buttonswhile turning the device back on. c. Release 3 and 6 when you see the progress bar is half way across the initial "Lexmark" splash screen.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Once in the diagnostics menu, select Printer Setup. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Select Engine Setting 9. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Enter 2 for the new decimal value, and submit the change. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Verify that under Printer Setup, the Engine Setting 9 has a value of 2. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Press the back button repeatedly until you return to the main Diagnostics Menu screen. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Select Exit in the lower right or left corner of the panel to exit the Diagnostics Menu. (Button location based on model) The device will then boot itself as normal. | Before running the OM Plus* calibration, perform a full reboot with the power switch. Do not rely on the reboot that happens when exiting the diagnostic menu or the auto-reboot after applying the npa file. Why? This is to prevent an engine re-calibration on the device to a previously known performing state. Note: A device reboot is not needed if you have just replaced a supply (toner cartridge or imaging unit) since an engine calibration is forced when a new supply is installed.
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