Brother MFC-9600, photocopy is broken, I don't understand

you would have to open it up, and inside are some lenticular mirrors the image bounces off of when its scanned. The mirrors likely have a mild dust buildup on them, which results in 'filtering' the image to a very light impression.

X-No-Archive: Yes

That doesn't make sense. The scanner gives solid black image when I scan in greyscale mode with the lid open. Photocopying with the lid open gives mild grey printout.

If the issue was with the scanning, I would suspect problems in scanned images too.

Dirty optics leads to less light getting to the latent white areas on the OPC, to neutralise the charge, and so toner stays on the OPC leading to grey instead of white on the paper.

Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on

N cook wrote: "Dirty optics leads to less light getting to the latent white areas on the OPC, to neutralise the charge, and so toner stays on the OPC leading to grey instead of white on the paper. "

This is a digital copier by the way. Scanner scans it first, stores it in memory, then, image is drawn onto the imaging drum with a laser beam.