Samsung does not make that chip.
Have the 6187s and it is developing white spots all over the screen. Had a tech come in to look at it and he said it was a bad dlp chip and samsung would send a replacement chip. Called samsung and was too my model is mot covered. Would not expect a $2500 tv to go bad in less than 3yrs. Definitely a defect in manufacturing by samsung. Amazing they will not offer a fix. Terrible