Multiple 1/16" Dot Pattern Impressions Pressed into Paper 2" from Paper Edge on 1 Side

[Spectrese]

Several weeks ago my HP 3550dn started pressing small dot impressions on one side on every printed page of the paper.  No ink in the dots - just the physical impressions.  There is a repeated pattern of dots...one is 3 dots in a tight triangular pattern - another is two dots in a line.

My guess it is some kind of track or something that moves the paper through the printer than has become damaged...?

Thanks in advance.

William

[Repairatrooper]

If the pattern repeats down the page then you can measure the distance between two and then refer to a repetitive defect chart to determine which component is causing the problem.

[Spectrese]

I don't quite understand the Interval Chart.

I did measure the total space between the dot impression patterns - and it occurs every 2 7/8" (75mm) - consistently down the one side long side of the letter-sized paper.

In my Internet reading - I believe my issue is called "Repeating Defects - Divots".

I did pull my Fuser Assembly out and looked at the reddish colored roller - it seemed intact and undamaged.

[Spectrese]

Hi...my repeative defect has now progressed - I now have - in addition to the repeating impressed divots w/o toner that run down the entire right side of the page - I now also have a faint black line running along the same right side of the printed page (next to the divots)  - starting at the top - about 2 3/16" / 55mm from the right paper edge.

I changed out my HP Q6470A Black Toner Cartridge - but it did not effect the repeat defects.

Any other ideas would be greatly appreciated.