What Is a Printhead?
One-Line Definition:
A printhead is the part of a printer that applies ink to paper during printing.
Quick Example:
Cleaning the printhead can fix streaky or missing colours in prints.
Full Glossary Entry:
A printhead is the core component of an inkjet printer responsible for depositing ink onto paper.
It contains hundreds or thousands of microscopic nozzles that spray precisely controlled droplets of ink to form text and images.
Mounted on a carriage that moves back and forth across the page, it fires droplets in response to electrical signals from the printer’s circuitry.
In some models, the printhead is integrated into the ink cartridge and replaced with each new cartridge; in others, it is a separate, semi-permanent component that ink cartridges plug into.
Why This Matters (Troubleshooting and Fixes):
A malfunctioning printhead is one of the most common causes of poor print quality in inkjet printers.
Because the nozzles are extremely fine, they are prone to clogging when the printer sits unused and ink dries inside them.
Blocked nozzles produce characteristic defects: horizontal streaks, missing lines, or incorrect colours.
Most printers include a built-in cleaning cycle – accessible through the software or control panel – that clears blockages by forcing ink through the nozzles.
Where the printhead is user-replaceable, a new unit typically resolves the problem; on models where it is built in, a failed printhead often makes the printer uneconomical to repair.
Common Issues Related to Printhead:
- Clogged or blocked nozzles
- Missing colours in prints
- Streaks or lines on output
- Printhead not recognised
- Poor print alignment