How to dissasemble a HP Scanjet G4050 to clean the inside glass

[43Robert]

Does anyone know how to open a HP Scanjet G4050 so I can clean the inside glass as it has turn filmy?

[Steamduck]

Hi,

Please take a look at http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=125&prodSeriesId=...

Best regards

[MIchaelMalloy]

Nice idea, but the instructions fail to mention nothing happens after the four screws are removed. I had to pry and use considerable force to get the top apart from the bottom. I cleaned the glass, twice. When I first opened it the glass seemed "greasy" it had an oily film all over it. I ended up opening the thing twice and using Windex the second time to clean the glass properly.

I'm still seeing streaks in scanned images of slides. I wonder if the scanning head itself needs to be cleaned. I can see a screw over the part that moves. I'm afraid to open it because I worry I might not get it back together properly. I can't access the scanning head itself so I blew canned air through the slot.

Does anyone know if there is a safe way to reach the scanning head and clean it properly?

[MIchaelMalloy]

Thanks for the link. I had more difficulty than I expected opening the scanner. The screws come out easily enough but the unit is tough to open. I eventually applied enough force to pry the top and bottom halves apart. I had to do this twice. The first time I found the glass covered in an oily sheen. I thought I cleaned it but after reassembling I notice smudge marks on the inside of the glass. I opened it again and cleaned thoroughly with Windex. The glass is now quite clean on both sides.

But, I'm still having streaking when I scan color slides. I couldn't open the scan head easily so I didn't try. I think the dirt is on the scan head. Is there a safe way to clean the scanning head itself? I see one screw on the covering of the part that slides. If I open it, can I reach the lamp and clean it safely?

Thank you very much!

[kingat95]

Dunno if you're still checking this a year later, but I'm curious still how you ended up getting the top cover off of the glass? I agree that the manual isn't very clear after taking out the four screws; did you have to use a prying tool or something? I've tried to take it off with my hands but it's just on there too much. Hoping when I clean it that I don't have the same problem with the streaks as well.

Thanks,

Aaron

[ArielF1]

Don't know if any of you can help me with the disassembly.  The link about how to do it is not valid anymore.  Where are the 4 screws.  Also for the one who did it you can use distilled water to keep it from streaking.

[kingat95]

I did end up getting it, wish I was able to make a video or something to help you out. Those black dots all over the underside actually are caps to screws, they just have adhesive on them so they're a little difficult to pry off.

I personally didn't have an issue with the streaking, I just did a couple rounds of Windex and it worked fine for me. I don't think the glass inherently has anything wrong with it that make it streaky.

[Larry1933]

I can pry the bottom off but I'm left with a solid bottom