How to Clean the HP DeskJet 3524 Printhead

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Please note: It is important that you do not spill distilled water or regular water on the PCB. Use a cotton swab to clean around the PCB.
If you spill any water on the PCB, immediately clean the PCB with isopropyl alcohol.
After cleaning the print-head, allow the device to air dry for a few hours.
In the last picture, you will see 4 black spots in the water. That is hard, dried ink which caused my printing problem.

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