First released in February 2008, the Samsung ML-3471ND printers
are based on a 35-ppm, 1,200-dpi engine. This particular model is
network ready and has a duplexer built in.
The ML-3471 has a first page out in less than nine seconds, uses a
400Mhz processor and comes standard with 64MB RAM (expandable up to
320MB). The monthly duty cycle is 50,000 pages.
These cartridges do not have a drum cover. They come new with a piece
of heavy paper with foam glued to it taped around the cartridge.
There are two cartridges available for these machines. The low yield
(ML-D3470A) is rated for 4,000 pages, and the high yield (ML-D3470B) is
rated for 10,000 pages.
At the time of this writing three machines worldwide have been
released using this engine: ML-3471ND, ML-3470D and ML-3471DK.
The cartridges themselves are easy to remanufacture and with list
prices (as of March 2008) of $199.99 for the HY and $139.99 for the LY,
very profitable as well.
Supplies required
1) Samsung ML-3471 toner: 250 grams for HY and 125 grams for LY
(preliminary amounts) 2) Replacement chip HY or LY 3) New
replacement drum 4) New replacement wiper blade 5) New replacement
doctor blade 6) New replacement developer roller 7) Conductive
grease 8) Drum lubricating powder
Tools required
1) Toner-approved vacuum 2) Phillips-head screwdriver 3) Small
common screwdriver 4) Needle-nose pliers
Remanufacturing instructions
1) Place the cartridge with the handle/supply chamber toward you.
Remove the three screws on the right end cap. See Figure 1.
2) Gently pry off the plastic drum axle bushing. Keep this
bushing with the appropriate end cap when removed. Each side is
different. See Figure 2.
3) On the top and bottom back edge of the end cap there are two
plastic tabs. Press in on the tab and remove the right end cap. See
Figures 3 and 4.
4) On the opposite side of the cartridge, remove the three screws on
the left end cap. See Figure 5.
5) Gently pry off the plastic drum axle bushing. Keep this bushing
with the appropriate end cap when removed. See Figure 6.
6) On the top and bottom back edge of the end cap, there are two
plastic tabs. Press in on the tab and remove the left end cap. See
Figures 7 and 8.
7) Lift off the roller assembly. See Figure 9.
8) Carefully pry off the side plastic pieces on both sides to release
the waste chamber. See Figures 10 and 11.
9) Remove the waste chamber. See Figure 12.
10) On the supply hopper, remove the fill plug and dump out any
remaining toner. See Figure 13.
11) Remove the developer roller drive gear and put a strip of tape
across the remaining gears. They do not need to be removed and the tape
will help keep them in place. See Figures 14 and 15.
12) On the fill plug side, press in on the plastic tab and remove the
spring/plastic bushing assembly. Be careful not to lose the spring. See
Figures 16 and 17.
13) Remove the developer roller. See Figure 18.
14) Remove the two screws on the doctor blade. See Figure 19.
15) Carefully pry up the doctor blade. See Figure 20.
16) Clean out any remaining toner from the hopper.
17) Clean the doctor blade and foam seals. See Figure 21.
18) Replace the doctor blade and two screws. See Figure 22.
19) Clean and install the developer roller, long shaft side to gear
side first. See Figure 23.
20) Snap the spring/plastic bushing assembly in place. Make sure the
tail of the spring is set properly. See Figures 24 and 25.
21) Install the drive gear on the developer roller. See Figure 26.
22)) Fill the hopper with the appropriate amount of toner (250g for
the HY/10K cartridge and 125g for the LY/4K cartridge). Replace the fill
plug and check for leaks. See Figure 27. Place the supply hopper aside.
23) On the waste hopper, remove the e-ring from the drum axle. See
Figure 28.
24) Slide the drum axle out from the side opposite the e-ring. See
Figure 29.
25) Remove the OPC drum. See Figure 30.
26) Slide the PCR to the non-contact side. Remove the PCR. See
Figures 31 and 32.
27) Remove the two screws and the wiper blade. See Figure 33.
28) Clean out all the toner from the hopper.
29) Coat the new wiper blade with your preferred lubricant.
Install the new wiper blade and two screws. The tail of the wiper blade
should face up. See Figure 34.
30) Clean the PCR with your preferred 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.
31) Clean the old conductive grease off the PCR shaft and
contact. Replace with new. See Figure 35.
32) Install the PCR by sliding the long shaft side through the
non-contact side. Bring it back to fit into the contact side. See Figure
36.
33) Coat the OPC drum with your preferred lubricant and install the
drum. See Figure 37.
34)
Install the drum axle small drum gear side first. Make sure that the
e-ring groove ends up on the small drum gear side. See Figures 38 and
39.
35) Install the e-ring. See Figure 40.
36) Install the waste hopper onto the supply chamber. Make sure that
the tabs on both sides lock into place on the side wall. See Figures 41
and 42.
37) Clean the foam rollers in the roller assembly with clean
compressed air.
38) Install the roller assembly. See Figure 43.
39)
Install the right-side end cap and three screws. Make sure the top rear
tabs lock in place. See Figures 44 and 45.
40) Press the drum axle bushing in place. Set it so the small
tab is at the end of the groove, making sure it is fully seated. The two
small bushings are different. Make sure you have the correct bushing
for this side. See Figure 46.
41) Remove the tape from the gears and install the left-side end
cap and three screws. Make sure the top rear tab locks in place. See
Figures 47 and 48.
42) Press the drum axle bushing in place. Set it so the small tab
is at the end of the groove, making sure it is fully seated. The two
small bushings are different. Make sure you have the correct bushing for
this side. See Figure 49.
43) The chip is held in place by plastic rivets. To replace the
chip, drill out the plastic rivets and install two small self-tapping
screws. Install the two screws before you remove the cover so that the
alignment does not change. You can now remove the screws and cover to
replace the chip. See Figures 50 and 51.
Printing test pages
Demo page
Press the Menu button until INFORMATION appears on the display.
Press the Scroll button until DEMO PAGE appears.
Press the OK button. A demo page will print out.
Configuration page
Press the Menu button until INFORMATION appears on the display.
Press the Scroll button until CONFIGURATION appears.
Press the OK button. A configuration page will print out.
Repetitive
Defect Chart
Upper fuser roller 77.8mm
OPC drum 75.5mm
Lower pressure roller 62.8mm (back of page)
Transfer roller 47.1mm (back of page)
Supply roller 44.9mm
PCR 37.7mm
Developer roller 35.2mm
Machine error codes
The error codes put out by these machines are all in plain English
and there is no need to go into them here.
Expected printer part life
Transfer roller 70,000 pages
Fuser unit 80,000 pages
Pickup roller 150,000 pages
Mike Josiah is technical director at Summit Technologies, a division
of UniNet Imaging Inc., a global distributor of toner, OPC drums, wiper
blades and other supplies. Josiah has been with the company since 1987.
He and his technical support team regularly contribute articles and
teach seminars at association meetings and trade shows. Contact him at
631-218-8376 or mjosiah@uninetimaging.com.
About
the Author
Mike Josiah is the East Coast technical director at
Uninet East Coast, a global distributor of toner, OPC drums, wiper
blades and other supplies. He and his support team contribute articles
and teach seminars at association meetings and trade shows.
