LJ pro 400 color /mfp475 lines on first page when printing

[axyun]

LJ pro 400 color /mfp475 has lines on first page when printing. No lines when copying. Any help is appreciated. Frank/ Action Photocopy

[Lance15]

Lines ONLY on the first page? How about subsequent pages? Using OEM toner?

[theengel]

print a config sheet and a diagnostics sheet, and tell us what you see.

Possibly the color copies have less black in them, and so you aren't seeing the defects as much.

[axyun]

toner is OEM. Customer printed several pages for me twice. Each time the first page had lines that were thicker
the pencil lines but not AS THICK AS CRAYON. I DON'T BELIEVE THEY WENT ALL THE WAY DOWN PAGE. I at this
because I thought I had taken them with me but I don't have them. Also after the first page there may have been
lines but hardly noticeable. The first page was very noticeable. Every time I ran copies there were no lines on any
pages.
I was not in customer's office for this repair. I was servicing a Xerox WC7125 and customer asked me to look at the HP
while there. Frank

[Lance15]

I've seen something similar on Dell C3760's (Phaser 6600). Smudges or lines on the first page, but, after that, it's sporadic. That's the belt. Could be same?

[axyun]

If it is belt wouldn't it also occur on copies? That is what confuses me

[Lance15]

Hmmmm, yeah.......

If you get back there, remember those samples.