hp laserjet 5100tn problem + teardown - Page 1
Forum section: electronics / general

author: carbon dude oxide
author_rank: Frequent Contributor
timestamp: July 03, 2013, 10:57:45 pm
content: hello, i received a hp laserjet 5100 today and as soon as i turned it on it made a very loud grinding noise, i decided to take the side panel off and have a look and determined it was coming from the back of the gear assembly (have not found the culprit though).does anyone have any idea what has caused this? and maby a cheap way of fixing it?

author: Skimask
author_rank: Super Contributor
timestamp: July 03, 2013, 11:10:27 pm
content: So, now it's gone from an electronics, tear-down, design, fix-it, make-it, break-it website to a PC and PC product consulting front?WTF?And if you Google that very SIMPLE, very popular, very easy to find parts for and very easy to fix, grinding issue with LaserJet printers, you'd know what needs to be done right off!

author: carbon dude oxide
author_rank: Frequent Contributor
timestamp: July 03, 2013, 11:13:33 pm
content: Sorryi was going to post some of the pictures of it as i was taking it apartIts a bit if a beast

author: Unknown
author_rank: Unknown
timestamp: July 03, 2013, 11:18:03 pm
content: Please allow me to translate this for you in terms that are much less confrontational:Please google your issue, you'll find the answer there. And please do post teardown pictures.

author: carbon dude oxide
author_rank: Frequent Contributor
timestamp: July 03, 2013, 11:26:01 pm
content: They shall be posted in the morning, did not realise the time T.T its covered with toner

author: carbon dude oxide
author_rank: Frequent Contributor
timestamp: July 04, 2013, 11:08:19 am
content: Ok so this is the partial teardown of the Hp laserjet 5100, i will be delving into it further once i get back from driving lessonsWhen i initialy got the printer as soon as i tuned it on it made a horrible grinding noise so i decided to investigate.First i had to take the top pannel off with 4 screws and a small wire ribbon cable connecting the printer to the lcd screen on the front.I then removed the tonerOnce i had removed the front pannel i then opend the front and back pannels to allow the side panel to pop off revealing the drive line.After removing 5 screws the drive line poped straight off and i did a bit of wiggling and moved one of the black nylon cogs at the back and the same with the cog attached to the main frame, which i did a bit of research on which seame to be the grinding noise problem. I reassembled and turned it on with no grinding noise yay!Unfortunatly the LCD display is blank (but lit up) and none of the controls light up or do anything.I then decided to have another look only to find that the control pcb has had some form of impact during transis in the ups van and it has had a focused impact on one of the buttons shattering the pcb arround it, bending the lcd's metal holding frame and broke the lcd protection cover ($161 to buy a new one T.T) i only paid £37 for the whole printer. The fun part is that the gears that were causing the grinding problem are right beneath the pcb that was shattered.Since then i have managed to get the printer to do a test print and it seams as one of the internal drive wheels under the toner and heating element is not connected to the drive line so i will be delving deeper later to find out why. Il get pictures for you