Our 115 latex starting printing some blur horizonatally, HP person at grimco said it could be line sensor dirty, we cleaned it, seemed to work ok for awhile, them it started same thing again, we cleaned it again, it helped some but it still is not as crisp as it used to be, seems better after we clean the line sensor, I ordered a line sensor and will try to replace, does the lines sensor require any calibration or etc after replacement? any input would be appreciated, thanks