ENUS4168Overview
This test consists of a printhead bank test and a sample “font/pitch” test. It indicates a hardware failure if numbered lines or parts of lines are missing from the printhead bank, or if dots are missing from characters in the font/pitch test.
Test procedure
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Load paper into the printer.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Make sure the Ready light is on.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Power off the printer.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Press and hold the LineFeed key.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Power on the printer while still holding the key down.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Release the key when printing starts.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
To interrupt the test, press the green Start/Stop key.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
When finished, power off the printer to end the continuous print test.
Important notes
Still need help?
Please contact Lexmark Technical Support if you need additional assistance.
NOTE: When calling for support, you will be asked for your machine/model type and serial number (SN). If you need help locating these, How to Locate the Serial Number on a Lexmark 24xx/25xx/25xx+ Series Forms (Dot Matrix) Printer.
Please call from near the printer in case the technician on the phone asks you to perform a task involving the printer.
LEGACY ID: HO928