Instructables

Cleaning The Underside of an HP's Scanner Glass

Picture of Cleaning The Underside of an HP's Scanner Glass
This is instructions on how to disassemble the top portion (scanner and Document Feed) of an HP Laserjet 3030.

The problem: Photo scans were having streaks in the image.
Cause: Wires connected to the scanner element dragging across the glass - these wires appear to be coated with some sort of light lubricant
Solution: Disassemble -- clean glass


Tools
T-10 Torx Bit <--- if you're buying a torx set, I recommend that you buy a tamper evident set just in case you need that feature later ;)

Awl or something with a pointy edge
Glass Cleaner and chamois
Rubbing Alcohol
 
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Step 1: Remove Screws and Keypad Cover

Picture of Remove Screws and Keypad Cover
Turn off and unplug your machine ;)

There are 5 T-10 torx screws that need to be removed -- see photo notes below. Remove them and store in a safe place.


The keypad cover is held in by friction and several tabs located at the top of the pad. Pry from the bottom of the cover and lift straight up. When the pad releases - pull up and away (towards your body) and guide the keypad off.


You'll notice that my machine is still on at this time. I was hoping I would not need to remove anything wire harnesses and keep the machine running while I did the fix (my parent's business needs this machine up to receive faxes).

Step 2: Removing the Keypad and Keypad Harness

Sorry for the blurry image. First -- locate the two tabs on the very ends of the keypad. The scanner bed locks into here. Press the lower portion of the tab down - you may hear a click.

Note the "hook-like" plastic tab and plastic nub (that locks into the tab) below the lcd panel and to the left of my dirty finger (sorry -- from oil change to scanner repair man). Push the tab up and slide the keypad to the left.

Now, gently pull straight up and locate the ribbon harness. Gently pull the ribbon harness out of the keypad. The plastic holder stays in place. Only the ribbon can be removed. Set the keypad aside.
niitesh2 years ago
http://factoidz.com/how-to-clean-a-scanner-glass/

A step to step guide on how to clean the scanner glass
Harch3 years ago
Awesome... thanks so much for this. Worked like a charm.
lanimoomoo4 years ago
 Great instructions!  Managed to clean out an ant colony living in the scanbed.
TBC475 years ago
That is exactly the info I was looking for. Couldn't get it from HP. Thanks for the help.
TBC47 TBC475 years ago
After reading the instructions again, and checking out my printer, I realized that the HP 3010 in the instructions, and my printer, an HP 3310, don't disassemble in the same manner. I took the lid off (unconnecting the light cord), and found 5 T-10 torx screws, 3 on the top back, and 2 on the top front. But, since the key pad is a "swing out" type, nothing else worked. I found that I could lift the scanning bed, but couldn't find a way to disconnect it. I did find that there was just enough room to get my hand in there and clean the bottom of the glass. So, with the loss of a little blood from all the sharp edges, I was able to accomplish the cleaning. Thanks for giving me the confidence to try this. I appreciate it.
kadnk686 years ago
I was given a hp all in one printer that didn't work. All I had to do was clean the underside of the glass and it started working again.
Wow, timing! I just got around to cleaning my scanner last night. I was turning the thing over and over trying to figure how it came apart before I noticed two screws in the slots where the lid hinges attach. That was all that held it together.
LasVegas7 years ago
Very good instructable. This is something that needs to be done periodically on any scanner. I've known a number of people that go out and buy a new scanner when this is all they needed.