imagine a perfect fit: compact proven performance
Imagine a laser printer thats a perfect fit for your business. This compact laser will fit anywhere and the consistent performance will meet all your printing needs. Samsungs ML-2850 series features a sleek design that will fit your office and provide the freedom of convenience and space. Also there's more to this packed performer. It also fits into your bottom line by providing reliable and economical production. Compact and reliable fits your needs. With Samsungs ML-2850 series its not that hard to imagine. Samsung Monochrome Laser Printer ML-2850D/2851ND

ML-2850D/2851ND

Samsung ML-2850 series is designed with your business in mind and intended to keep you working with less maintenance. It features the highest monthly duty cycle in its class, a large toner capacity with the toner save function, and a large paper capacity.

Components

imagine the benefits of high performance printing
Advanced design that redefines the modern office
What would your business look like with a small quiet laser printer that could be used anywhere? Samsungs ML-2850 series can be placed where it is convenient for you, on your desk or at the corner of your office, and its stylish design wont need to be hidden. The worlds smallest laser printer with built-in duplex is only 364 x 369 x 209.6 mm. Visualize all the places this compact laser could fit into your business. And imagine how the trendy stylish design will update your environment.
Reliable performer that enhances business production
1. Output Tray 2. Control Panel 3. Front Cover 4. Manual Tray 5. Tray 1 6. Optional Tray 2 7. Paper Level Indicator
How much could you accomplish with a high performance laser printer that is fast and reliable? With 400 MHz processor and printing speed of 28 ppm (A4) (Letter/30 ppm), printing production wont slow down, even with large print jobs. And the optional second cassette tray will eliminate the need for constant paper monitoring. Best of all, Samsungs ML-2850 series has a superior monthly duty cycle of 30,000 pages a month. With these reliable features, your business will accomplish more than you ever thought.

Control Panel Components

250 250
Economical laser that is also easy to use
1. Error LED 2. Online LED 3. Cancel Button
Would a laser printer that is easy to use and economical simplify your business? Samsungs ML-2850 series is designed with a simple LED panel and one-button commands that anyone can master quickly. Duplex printing is just as simple to use, saving you time and paper. The savings don't stop there. This laser printer is very economical to operate and has a low cost per page. Ultimately, the Samsungs ML-2850 series saves your business both time and money.
Various Printing Features
Duplex Printing: Enhance your efficiency with one-touch duplex feature that comes standard with the ML-2850 series. Create your own double-sided document with options such as long edge and short edge printing. In addition, two-sided printing will save paper, allowing for convenient storage and portability.
imagine efficient networking

Network Management Tools

SyncThru Web Admin Service
SyncThru Web Admin Service is a web-based fleet management tool for configuring printers, checking device status, performing remote diagnostics, receiving alerts when possible problems occur, and changing settings without leaving your desk.

Long Edge

Short Edge
N-up Printing: Create multiple copies of the same page or
photo onto one page. No need to cut and paste or print multiple times. N-up printing feature creates up to 16 images on one page and produces just the size you need.

SyncThru Web Service

Increase productivity with SyncThru Web Service. This userfriendly printer configuration tool requires no installation in the form of embedded web server that can be accessed by webbrowser. It provides administrators with the ability to change network and individual printer settings, upgrade firmware and view network printer status.

Wired Network Printing Booklet Printing: The ML-2850 series can handle booklet creation easily and efficiently.
ML-2851ND offers network printing capabilities to easily connect your workplace, including an Ethernet interface capable of being cabled directly into your network.

Fold here.

Poster Printing: Create large sized posters with the
'Poster' printing feature. Start with any size image and create proportional posters of any size. Print out is printed on many pages to create a seamless poster.

Specitications

ML-2850D
Speed (Mono) Resolution First Print Out Time (Mono) Emulation Duplex Up to 28 ppm in A4 (30 ppm in Letter) Up to 1,200 x 1,200 dpi effective output Less than 8.5 sec PostScript3, PCL6, SPL, IBM ProPrinter, EPSON Built-in 250-sheet Cassette @80g/m , 1-sheet Multi Purpose Tray @80g/m2

ML-2851ND

Paper Handling
Input Capacity and Types Output Capacity and Types Media Size Special Media
150-sheet @75g/m2 Face-Down 76 x 127 mm (3" x 5") ~ 216 x 356 mm (8.5" x 14") Transparency, Envelope, Labels, Post Card, Card stock Samsung 400 MHz 32 MB (Max.160 MB) Windows 2000 / XP (32 / 64bits) / Vista (32 / 64bits) / 2003 Server (32 / 64bits) Various Linux OS: - Red Hat 8~9, - Fedora Core 1~4, - Mandrake 9.2~10.1, - SuSE 8.2~9.2 Mac OS 8.6~9.2, 10.1~10.4

General

Processor Memory / Storage OS Compatibility
Interface Noise Level Duty Cycle, Monthly Dimension (W x D x H) Weight

Hi-Speed USB 2.0

Hi-Speed USB 2.0, Ethernet 10 / 100 Base TX Less than 50dBA (Printing) Less than 26dBA (Standby) 30,000 sheets 364 x 369 x 209.6 mm (14.33" x 14.52" x 8.25") 8.8 Kg (19.4 lbs)
- Please visit www.samsungprinter.com to download the latest software version. * Print speed will be affected by Operating system used, computing performance, application software, connecting method, media type, media size and job complexity. ** Sound Pressure Level, ISO7779

Supplies and Options

Consumables
Type Yield 1-piece Cartridge Standard: Average Cartridge Yield 2K standard pages. High Yield: Average cartridge Yield 5K standard pages. Declared cartridge yield in accordance with ISO/IEC 19752. Model Code ML-D2850A, ML-D2850B 250-sheet Cassette Tray 128 MB Memory Card ****

Options

Toner Cartridge

ML-D2850A

ML-D2850B
Toner Cartidge Package Toner Cartidge Package Toner Cartidge Package Toner Cartidge Package

Europe & CIS America China Rest of World

Second Cassette

ML-S2850A

Memory Card

CLP-MEM301
*** Declared cartridge yield value in accordance with ISO/IEC 19752 **** Optional memory card will be adopted by products produced from November '07.

Distributed by

Design and Specifications are subject to change without notice. Trademarks of other companies mentioned in these publications are hereby recognised and acknowledged.

2007. 10

SAMSUNG ML-2850/2851ND CARTRIDGE REMANUFACTURING INSTRUCTIONS
THE SAMSUNG ML-2850/2851ND TONER CARTRIDGE

DOC# 0440

By Mike Josiah and the technical staff at Summit Technologies a distributor of Summit and Uninet Products.
11124 Washington Blvd., Culver City, California 90232 USA Ph +Fx +techsupport@uninetimaging.com www.uninetimaging.com
2008 UniNet Imaging Inc. All Trademark names are property of their respective owners. Product brand names mentioned are intended to show compatibility only. UniNet Imaging does not warrant downloaded information.
Remanufacturing the Samsung ML-2850/2851ND Toner Cartridge
irst released in January 2008 the Samsung ML2850/2851ND printers are based on one of Samsungs newest engines. The ML-2851 series runs at 30 ppm with a maximum resolution of 1200 dpi. The first page out is stated to be under 8.5 seconds, and the printer comes standard with 32MB of memory. (Expandable to 160MB). As the model number implies, Duplexing and a network card are built in.
These cartridges do not have a drum cover, and come new with a piece of heavy paper taped around the cartridge. (See Figure 1) All new cartridges opened so far have shown some toner leakage on the drum that would have shown on any prints for at least a few pages. The standard cartridge (Samsung part# ML-2850A) is rated for 2,000 pages. The HY cartridge (Samsung part# ML-2850B) is rated for 5,000 pages. As with pretty much all cartridges these days, the cartridge has a chip, and it has to be replaced each cycle. Cartridge troubleshooting as well as common error messages will be listed at the end of the instructions

Figure 1

Required Tools 1) Toner approved vacuum. 2) A small Common screw driver 3) A Phillips head screwdriver
4) Needle nose pliers Required Supplies Samsung 2851 Toner New replacement chip Conductive Grease 99% Isopropyl alcohol Drum lubricating powder 1) Place the cartridge with the handle up, facing towards you. Remove the three screws from the right side end cap. See Figure 2

Figure 4

Figure 2
2) On the left side end cap, remove the three screws. See Figure 3

Figure 5

Figure 3
3) While still on the left end cap, locate the top tab. Press in on the tab, and remove the end cap. The drum axle may come out with the end cap. Separate the two. See Figures 4, 5, & 6

Figure 6

4) On the right side end cap, press in on the top tab and remove the end cap. See Figures 7 & 8.
6) Lift up on the drum/waste hopper and remove. If the drum axle came loose, be careful to hold the drum so it does not become damaged. Remove the drum/waste assy. See Figures 10 & 11

Figure 7

Figure 10

Figure 8

5) Separate the two halves slightly, and lift off the middle top cover. See Figure 9

Figure 11

7) Remove the drum axle from the large gear side of the waste assembly. Remove the drum. See Figures 12 & 13

Figure 9

9) Clean the PCR with your normal PCR cleaner. WARNING: Do not clean the OEM PCR with alcohol, as this will remove the conductive coating from the roller. If the PCR is an aftermarket, follow the cleaning methods recommended by the manufacturer. If the PCR is an OEM, we recommend it be cleaned with your standard PCR cleaner.

Figure 12

10) Remove both the PCR holders by pressing in on the tabs at the bottom of the holder. These holders need to be removed to allow access to the wiper blade. See Figures 16 & 17

Figure 13

8) Remove the PCR from the assembly. See Figure 14

Figure 16 Figure 14

9) Remove the PCR cleaning roller. See Figure 15

Figure 15

Figure 17
11) Remove the two screws from the wiper blade, remove the blade. See Figure 18
15) Blow off or vacuum the PCR cleaning roller. Install in the waste hopper. See Figure 22

Figure 18

12) Clean out all the waste toner from the hopper. Make sure the seal are clean. See Figure 19

Figure 22

16) Place a small amount of conductive grease in the holders, and install the PCR. See Figure 23

Figure 19

13) Install the cleaned or new wiper blade and two screws. See Figure 20

Figure 23

17) The large gear side of the drum axle shaft has conductive grease on it. Regardless of if you are replacing the drum or not, clean the old grease off, and replace with new. See Figure 24

Figure 20

14) Install the two PCR holders. See Figure 21

Figure 24

18) Install the drum and axle from the small gear side of the drum into the waste hopper. Make sure the keyed end of the shaft is on the large gear side. See Figure 25

Figure 21

Figure 25
19) On the supply hopper, carefully pry out the fill plug and dump out any remaining toner. The fill plug can be difficult to remove as it is recessed. Take a small common screwdriver and work it around the edge lifting slightly until it comes loose. See Figure 26
22) Clean out all the remaining toner from the hopper. 23) Make sure the doctor blade sealing foam and the developer rollers seals are clean and intact. See Fig. 29

Figure 29 Figure 26

20) Remove the developer roller. See Figure 27 24) Clean the Dr. blade edge so there is no evidence of build up along the edge. If any buildup exists, the cartridge will streak. This blade can be cleaned with your preferred Samsung DB cleaner. See Figure 30

Figure 27

21) Remove the 2 screws from the doctor blade, remove the blade. See Figure 28

Figure 30

25) Install the doctor blade and two screws. See Fig. 31

Figure 28

Figure 31
26) Clean the developer roller with a dedicated DVR cleaner, and replace into the hopper. See Figure 32
29) Slide the middle top cover/PCR assembly into place. Make sure all the middle tabs fit under the edge of the waste hopper. See Figures 35 & 36

Figure 32

27) Fill the hopper with ML-2851 toner, replace the fill plug, check for leaks. See Figure 33

Figure 35

Figure 33
28) Fit both sides of the waste hopper tabs into the toner hopper. See Figure 34

Figure 36

30) Clean the contacts on the left side end cap, and replace the conductive grease. Align the drum axle keyed end so it will fit into the keyed slot of the end cap. Snap the end cap into place. See Figures 37 & 38 31) Install the three screws into the end cap. See Figure 39

Figure 34

34) Clean the contacts on the right side end cap, and replace the conductive grease. Snap the end cap into place, and replace the three screws. See Figures 40 & 41

Figure 37

Figure 40

Figure 41 Figure 38

35) To replace the chip, drill out the two plastic rivets with a small drill, remove the cover, and chip. See Figure 42

Figure 39

Figure 42
36) Install the new chip and cover, insert 2 small screws that correspond to the holes drilled to hold everything in place. See Figures 43 & 44
Printer Error Messages: Error light is on steady, red color: Cover open, Toner cartridge missing, toner cartridge empty Error light is on blinking, red color: Printer error, Toner Low Error light is on steady, Orange color: paper jam Printing test Pages: To print the Demo page, Press and hold the cancel button for 2 seconds. The demo page will print out. To print the configuration page/menu map pages, Press and hold the Cancel button for 4 seconds. Both the configuration pages and the menu map pages will print.

Figure 43

Figure 44
Common Cartridge Problems

Repetitive defect chart: Upper heat roller: 77.6mm OPC drum: 75.5mm Lower pressure roller(1st): 62.8mm Lower pressure roller (2nd): 37.7mm Supply Roller: 47.1mm Transfer roller: 47.0mm Developer roller: 35.2mm PCR 26.7mm