HP Color LaserJet 4550, N, DN Printers
Service Manual

$9.99
HP Color LaserJet 4550, N, DN Printers <br> Service Manual
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HP Color LaserJet 4550, N, DN Printers Service Manual

This manual contains the necessary information to service the Color LaserJet 4550, N, DN Printers

Contents:

1 Printer description
Printer features
Identification
Site requirements
Printer specifications
Printer assemblies
Media requirements
Environmental Product Stewardship Program
Regulatory statements
Safety information

2 Service approach
Service approach
Parts and supplies
Warranty statement

3 Installation and configuration
Unpack the printer
Installation
Connecting to a network
Enhanced I/O (EIO) configuration
Printer drivers
Network configuration
Configuration tips
Setting network security on the printer

4 Printer maintenance
Cleaning the printer and accessories
Approximate replacement intervals for consumable items
Locating consumables
Replacing consumable items
DIMM configuration

5 Theory of operation
Introduction
Basic operation
Image formation
Toner density
Mechanical system
Paper path
DC controller subsystem
Motors and fans
Formatter system
Power supplies

6 Removal and replacement
Introduction
Consumable assemblies
Covers, drawers, and top and front assemblies
Right side assemblies
Left side assemblies
Rear assemblies
Internal assemblies

7 Troubleshooting
Introduction
Troubleshooting process
Printer error troubleshooting
Paper path troubleshooting
Image formation troubleshooting
HP ColorSmart II
Matching colors
Four-color printing (CMYK)
Image defects
Overhead transparency defects
Repetitive defects troubleshooting
Interface troubleshooting
Control panel troubleshooting
Troubleshooting tools
Service mode
Diagnostics mode
Diagrams

8 Parts and diagrams
Introduction
Ordering parts
Illustrations and parts lists
Alphabetical parts list
Numerical parts list .

FORMAT: PDF
ZIP archive: 56 618 kB

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We are in business since 2002 and do our best to give our customers perfect service!

  tony dean 2010-02-20 15:13:27  
  i downloaded epson r285 adjustment program!
  Brian Bloomer 2011-04-30 05:19:44  
  Success! I installed a OctInkjet waste inkpad overflow and tried their reset to no avail - they furnished your link. Your reset fixed my RX690 Epson printer within minutes . Ink started to flow into the overflow immediately (just as well it was installed). I did apattern check-all six colours perfect. Thank you Brian
  david miranda 2016-04-07 16:43:28  
  My Epson Stylus R280 is printing again! This was my favorite printer for photos and quick single-sided jobs. It printed and printed until the dreaded message and alternating flashing orange lights appeared.

I was skeptical that WicReset could do anything because of the flashing lights. I downloaded the Windows version (XP), virus scanned it and after it passed, installed it. I first tried the trial reset that sets the waste counters to 90%. That worked immediately. I bought a key. That worked immediately and now my printer is working like new and waste counters are near 0.

I use a continuous ink system (CIS) on my Epson printers... have for years. This software also has a nice utility to charge the cartridges and clean the heads. My R280 printer sat for a while after the counters reached limit and the ink lines filled with air. I used the WicReset utility to charge & clean, and now it prints like new.

This software is easy to use and guides you step by step. I encountered no difficulties and everything worked first time. It is very good that there are smart engineers out there who took the time to reverse-engineer Epson\'s awful ink pad limitations.

One note of caution, and this has nothing to do with WicReset... I print so much and fear my ink pads will truly overflow, so I\'ll be installing a waste ink tank on my printers. I had one on an ancient R200 printer and it worked great. This is an essential accessory for CIS printers.

Thank you WicReset.
  CEDRIC MANUEL 2026-01-29 13:19:56  
  WIC reset key works! I only bought one reset key... i had my doubts (scam)...I really need to get my L805 to work! So i crossed my fingers and paid thru paypal...!!!!
  Wesley Pritchard 2003-11-10 00:29:10  
  This program is a definate must have if you want to service your own printer. Using this program along with the servive manual (440,640,740) will help you to determine what the problem is. The program shows print head voltages, waste ink counter and reset, and recover print head functions just to name a few of the useful functions that this program has to offer. It returned my printer from a paperweight into a working Epson 640 in minutes. Even if your printer is working properly you can use this program ensure it will keep working. For less than $6.00 it is worth having.
  Joseph Hare 2025-03-29 19:59:22  
  I replaced the waste ink tank and thought all was good until I received the dreadful message that ink pad was at the end of service life. I had previously downloaded the WIC program. I was skeptical, but figured I would give it a shot. I ordered a key, installed it, and had to play around a little bit, but finally got the all clear. Could not be happier. Highly, highly, highly recommend it.
  theold fart 2012-08-18 12:01:50  
  Program is easy to use, with the additional manual for reference. It allowed me to correct a corrupted EEPROM in the printer. All the .prn files are missing, so setting up the printer/scanner and the final print check are not possible. If you only want to reset the ink pad counter then there are cheaper/ free program available. Would give it a GOOD rating if missing files were included.
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