I use a Fargo DTC300 and a Personna C30 and have replaced this part a no. of times as it seems to be rather sensitive to dirt contamination (we use our printers working in tents at aoutside events and they do have a rather hard life).

The process of dismantling the printers is quite straightforward but is also quite inticate and I would only advise tackling this job if you are used to taking apart items such as laptop computers as much of the work is very similar. There is also a significant risk of altering the printhead set up when doing this work and so rendering the printer unusable - I was only forced into doing these repairs as we were working over a weekend and could not get an engineer out.

At the end of the day it may be best to have the replacement carried out by a qualified dealer?