Question about HP LaserJet 2420n Printer
Posted on Apr 04, 2008
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Apr 11, 2013 | HP LaserJet 4250dtn Printer
Mar 28, 2013 | HP LaserJet 4100n Printer
Aug 12, 2010 | Canon Office Equipment & Supplies
May 06, 2010 | HP LaserJet 2420 Printer
Oct 21, 2009 | HP Color LaserJet 2600n Printer
Mar 25, 2009 | HP LaserJet 4050 Printer
Mar 19, 2008 | HP LaserJet 2420n Printer
Nov 08, 2007 | HP LaserJet 2420 Printer
I typically use "Chux" wipes and a shop-vac to start with. The wipes wipe up and REALLY HOLD the toner & paper particles, holds 'em tighter than a Hobo does a ham sandwich...
(I'll concede to the 'by-the-book' crowd that a specific (read EXPEN$IVE) type of vacuum cleaner is recommended by HP & most other service org's. I've used my shop-vac for 12+ years and have serviced thousands of HP LJ's, CLJ's, AiO's, MFM's, DJ's, OJ's, etc. I have never lost a single printer because I didn't use the 'right' type of vacuum...)
The Chux wipes are available from PartsNow, LLC; www.partsnow.com/.
They also carry maint kits for almost every HP printer made as well as Lexmark, Canon, Xerox, etc.
I use Cooper's Platen Cleaner (PartsNow) to clean the rollers using 2" x 2" gauze squares and nitrile gloves. Fedron works well too. HP's website mentions isopropyl alcohol and water as their recommended solvents. Use waht works best for you.
Having some 6-inch long cotton tipped applicators (wooden handled single ended Q-Tips...) helps tremendously.
In conjunction with the correct service manual, (in your case, Combined Service Manual for HP LaserJet 4L / ML & 4P / MPHP Publication Number C2005-90988, August 1993), a thorough cleaning is very easy for almost anyone to perform.
PartsNow and several other websites have HP Svc Man's online for free, Google around.
A legacy utility from HP that I've not yet tried can print and cycle cleaning sheets to clean mainly the fuser, but also claims to clean rollers as well. HP printer specialists will recognize 'cleaning sheets' from HP's newer models, built in to the menu structure. The utility will allow you to do the same for older (LJ 4, 5, & 6) printers. Find it at:
Another Combined Svc Man is available as well that covers:
HP LaserJet 4 / 4M
(C2001A / C2021A)
HP LaserJet 4 Plus / 4M Plus
(C2037A / C2039A)
HP LaserJet 5 / 5M / 5N
(C3916A / C3917A / C3952A)
HP Publication Number C3916-90984 (March 1996).
As far as Scheduled cleaning, the cleverly formatted (LOL) table below lists HP's recommended service intervals. Over the years, I've found that adhering to the schedule has reduced unplanned downtime by almost 80%!!
DESCRIPTION / QTY / EST. LIFE (pages) / REMARKS
1. Toner Cartridge / 1 / 6800 (note 1) / When print becomes faint, shake cartridge to distribute remaining toner.
2. MP (Tray 1) Pickup Roller Assembly / 1 / 200,000 / Replace roller and separation pad together.
3. PC (Tray 2) Pickup Roller / 1 / 200,000 / Look for glazing and cracks.
4. Separation Pad / 1 / 200,000 / Look for glazing and grooves. Replace together with Pickup Rollers.
5. Transfer Charging Roller / 1 / 200,000 / May affect print quality and/or paper jams.
6. Fuser Assembly (115 V, 50/60 Hz) / 1 / 200,000 / May affect print quality and/or paper jams. Look for marks on rollers.
6a. Fuser Assembly (220 V, 50 Hz) / 1 / 200,000
7. LC (Tray 3) Pickup Roller / 1 / 200,000 / Look for glazing and grooves. Replace the Separation Pad.
8. Exhaust Fan / 1 / 25,000 hrs. (I've only had to replace one in 12 yrs...)
Note 1: The estimated Toner Cartridge life is based on A4 or letter size prints with an average of 5% toner coverage, and with the density setting at 3.
Best of luck,
Oct 16, 2007 | HP LaserJet 4 plus Printer
256 people viewed this question
Usually answered in minutes!