[CQ] lines appeared on the first pages of print (2035)

[akbareshghi]

my 2035 ricoh copier print quality is good at high volumes of pages of one documet consecutively,but the one line appeared on the first pages number 1,2,3,4 of document
then from page 5 to end , this line dissapeared (quality become good)
the pages of A4 with lines
the postion of this line is fiexd on the pages but thickness the this line is varied
please Technicians help me to solve this problem
which part(or parts) of my machine has created this line?
thank all technicians for attemp
2.jpg

[bbapst]

how does the fuser look?

[mrwho]

My money is also on the fuser roller.