oki B2520 mfp it is printing ok but when scans the image is too light

[ernesto]

Hi,

oki B2520 mfp it is printing ok but when scans the image is too light.

I have cleaned sensor contact and the exposure system (white print)

everyone knows can I do a contact sensor adjust ?

how can I enter in the service mode ?

I look forward to hearing from you

thanks a lot.