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+[* black] Here is a color-coded diagram of how the printhead is built. The only difference is that there 3 ink nozzles in a row instead of over 40.
+[* red] Ink flows from the cartridge into the printhead through the red circles.
+[* orange] Ink flows into chambers underneath the piezo elements (marked by orange lines).
+[* yellow] Individually addressable piezo elements for each nozzle cover the ink chambers.
+[* green] The piezo elements are connected to a common ground by metal strips.
+[* blue] (Second image) The ribbon cable (shown as a blue overlay) connects the other terminal of all the piezo elements to the multiplexer.

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