[CQ] mp7500 uneven toner on page

[ahobo666]

hello
last week i've changed the developer on gestetner mp 7500
this week i have this problem
uneven black print, this is a sample on corel black page printed
can anyone help me solve this issue?

thank you

[ahobo666]

Re: mp7500 uneven toner on page

img007.jpg

[Zaxxon]

Re: mp7500 uneven toner on page

[ATTACH=CONFIG]27941[/ATTACH]

What have you done until now to solve this issue other than change the developer?

[ahobo666]

Re: mp7500 uneven toner on page

last week , printed full black, right after i;ve changed the developer
now is like this

[NeoMatrix]

Re: mp7500 uneven toner on page

Looks like the dev bias is shorting out. Bearing, staple or metal shards in the doc blade????

[ahobo666]

Re: mp7500 uneven toner on page

can it have something with corona wires and corona grid?

[ahobo666]

Re: mp7500 uneven toner on page

in think it has something with sc settings, i;ve changed all to default after developer change

[Zaxxon]

Re: mp7500 uneven toner on page

in think it has something with sc settings, i;ve changed all to default after developer change

This is not good, you have to reenter the "birthcertificate" found on the machine, and reinstall a fresh developer (remember to do SP2801)

[Zeldaman]

[johndr]

Re: mp7500 uneven toner on page

Totaly black pages usually gets from charge corona & grid and gives a SC300. Did you see any SC code? Did you chek sc history?

[Zaxxon]

Re: mp7500 uneven toner on page

Totaly black pages usually gets from charge corona & grid and gives a SC300. Did you see any SC code? Did you chek sc history?

I don't think he meant the print is black, but that the coverage is uneven...

[wester]

Re: mp7500 uneven toner on page

This is not good, you have to reenter the "birthcertificate" found on the machine, and reinstall a fresh developer (remember to do SP2801)

I'd have to agree with this. It would be the place to start.

[johndr]

Re: mp7500 uneven toner on page

I don't think he meant the print is black, but that the coverage is uneven...

You are right. My mistake.
I just saw the picture more carefully and it looks like the Developer is too low.