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Designjet Z3100
Microsoft Windows 10 (32-bit)

I had printer to tell me to reseat red MK red printhead, which I did twice.  The third time I got an error code 2.1.10.  Checking on this it says it can be a PAC carriage problem or printhead problem.  I am hoping it is printhead since I got the notification.  My question is this--How can I get to the printheads with the carriage locked?

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