"PLATEN ROLLER" rotating in reverse order.

Hi,

Are you referring to the platen roller? The platen roller is the cylinder that's underneath the printhead which pulls the labels from the roll/box and then pushes it at a certain speed so that the printhead prints onto the label. The platen roller is usually coated in rubber and you can check if the platen roller has some eroded or cut sections.

Unfortunately, the platen roller is a consumable item, you'll need to replace the platen roller. Take a look at our blog for more information about the platen roller.

https://www.bartechsystems.com/barcode-printer-not-working/

If you can remove the platen, roller, you may find a label stuck on the deflector. Remove the label from the deflector. Make sure the deflector is installed properly.

Step 1

(1) Pull off the platen knob 1.

(2) Open the access cover Assy 4 toward the front to remove.

(3) Lift up the sheet guide Assy 5 to remove.

(4) Turn the change lever 2 toward the bottom position.

(5) Insert a flat-blade screwdriver into grooves of frame (5 places for ML 321, 4 places for ML320) and twist to disengage claws of upper cover 3.

(6) Raise the front side of upper cover Assy 3 and shift toward the rear to disengage claws of frame (6 places for ML321, 5 places for ML320).

(7) Raise the upper cover Assy 3 to remove.

(8) To install, follow the removal steps in reverse order.

Note on installation:

Match the posts A at both sides of the sheet guide 5 with the arrow marks on the upper cover. Push the guide into the cover.








Step 2

(1) Open the access cover 1.

(2) Lift up the sheet guide Assy 4 to remove.

(3) Tilting the pull-up roller Assy 2 toward the front, remove it from the shaft of platen Assy 3.

(4) To install, follow the removal steps in reverse order.
Note: Remove the sheet guide Assy 4 before installing or removing the pull-up roller Assy 2.



Step 3

(1) Open the access cover.

(2) Pull up and rotate the head clamp 1 to unclamp the printhead 2 as shown in fig. 3.3.1.

(3) Disconnect the printhead 2 from PC connector 3 and remove.

(4) To install, reverse the removal steps.

Notes on installation:

(1) Insert the printhead 2 into the PC connector 3 while pushing it against the carriage frame 4.

(2) The head clamp 1 must be securely sandwiched between printhead 2 and carriage frame 4 as

shown in fig. 3.3.2 below.

(3) Be sure to check the gap between platen and printhead (see 4).

(4) Be careful not to touch the print head while it is hot.

Important: There is a shim on the carriage frame 4, which hangs over the platen side of the frame. Be sure to replace it correctly. Improper positioning of this shim will severely affect the printhead gap.

Step 4

(1) Remove the printhead (see 3.3.1 below).

(2) Open the pull-up roller cover 1.

(3) Remove the shim on the carriage frame.

(4) Loosen the screws holding the carriage assembly to the carriage frame--this allows more play between the printhead and the platen.

(5) Raise and remove the ribbon protector 2.

(6) To install, follow the removal steps in reverse order. Be sure to replace the shim in exactly the

same position as it was before disassembly.

Step 5

(1) Remove the printhead (see 3.3.1 ).

(2) Remove the upper cover (see 3.3.1 ).

(3) Remove the pull-up roller Assy (see 3.3.3 ).

(4) Remove the ribbon protector (see 3.3.2 ).

(5) Turn the change lever 1 to the bottom position.

(6) Push in the lock levers 2 on both sides to unlock the Assy from the frame, then rotate them upward 90°.

(7) Remove the platen Assy 4 from the base frame.

(8) To install, follow the removal steps in reverse order.

Becareful and besure to disconnect from power source.

I wish I had one in front of me, but I don't. Brother used two ways of holding the Platen (big black roller in place. Open the top cover and look at the frame where the platen is held. You will likely see plastic clips holding the axial that runs through the platen (85% of brother machines have clips), or you will see that the axial runs directly through the frame. If you see clips just squeeze the tabs and lift up. Note which side has the gear, so that it is reinstalled the same way. If you don't have clips you will need to loosen the Allen screws holding the knob to the platen roller, and the roller will lift right out. If the label left any of the rollers sticky they must be completely cleaned before reassembly, Goo-Gone is a good product to remove gummy labels.

Best of luck, Ron

to replace the feed rollers under the platen. 1 - remove the platen by squeezing the black plastic clips at the ends of the platen and pulling the platen straight up. 2 - pull the paper pan out, 3 - push down on the feed roller set and rotate it towards you. replace bad rollers and put things back in reverse order. there is a guide on the rod the feed roller unit sits on, make sure the guide on the feed roller unit goes back in this. there are pins at the right side and left side of the right and left feed roller units. these are for positioning the paper pan in the slotted tabs on the bottom of the paper pan. make sure the gear on the platen goes on the left side, position the clips to center on the frame, then push straight down. make sure both clip are fastened in. the only reason you should be replacing these rollers is if they are splitting apart or falling off due to the pins at the ends of the rollers wearing off (never seen this happen on a WW6) if you are having some sort of other problem, you might ask for a different solution before doing this - its harder than it sounds.

Check your platen roller for debris, clean with alcohol swab.

Use scissors to cut the media 1" outside the printer, because if you tear it off it will be too short and will curl down into the platen roller again. Hope this helps!

6000 is a paper feed issue, not the feed roller, but the platen roller. Could be something fell in the back and is stopping the platen roller from turning, ink or grease on the encoder disk at the end of the roller, or even a bad motor. Probably a repair best done in the shop.

This web site http://my.okidata.com/PP-ML490.nsf?opendatabase
should walk you through the steps to clean the platen. I am almost certain that you can remove the knob and clean it. Good Luck

Call Brian at Peak Technologies for the platen roller 877-863-2522 xt. 6807