Proceed as follows:
1) Left Side Cover
- One M4x12mm pan head threading screw at the front under the front door.
- One M4x12mm pan head threading screw at the rear under the back door.
- Pry free the front lip at top and bottom.
- Pry free the rear lip at the top.
2) Pickup Gear Bias Spring
- Unhook its lower end.
3) Pickup Gear w/Spring
- One claw; remove the gear.
- NOTE the shaft's at-rest position -- the flat is facing up.
The pickup roller is now free to rotate; you can swab it thoroughly w/ methyl hydrate. The proximity of plastic parts around the roller precludes the use of strong solvents.
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You're not wrong about removing the pickup roller, but it's typical in the design of these cheapie printers. Sadly, it would have taken minimal modification in the design to have made this a 2-minute replacement rather than 20 minutes. Never mind.
ReplyDeleteFor those who follow these steps, it's actually not much more work to remove the roller assy, and if the rubber is worn smooth at the point of contact with paper then any cleaning will be short-lived. I didn't have a replacement part but I removed the assembly anyway so that I could rotate the rubber tyre to a new position - problem solved. Make sure you look carefully at the tyre to see the point at which contact is made with the paper, you need to pry a small jeweler's screwdriver or similar under the tyre, then raise it while you turn the plastic hub to work the tyre around. Kind of hard to explain but easy to do. Main thing is to make sure you turn in the correct direction so that the worn part of the tyre is moved to the flat spot of the hub - no contact is made with the paper here.
Ok, so that's that theory. Removing the assy carrying on from Tom's steps....
1: Make sure you have removed the Paper Cassette and the Drum/Toner cartridge.
2: Place the machine on its back, remove 6 large screws from the metal shield underneath.
3: With the large black gear already removed you will see a white plastic bearing that the shaft goes through the plastic frame. It has a small extension which you carefully use to rotate the bearing TOP TO REAR which will allow it to be slid out of the frame (it remains on the shaft.
4: Now you can slide the shaft out of the feed assy, you only need slide it to the left about 1-2 cm's, no need to remove it.
5: At this point the assy is mainly free, held in only by the large black plastic retainer at the rh side of the assy, but there is also a black plastic arm which connects to the assy at the bottom/rear of the feed assy, AND a silver compression spring between the assy and the upper frame - DON'T LOSE IT.
6: You want good light for this to be sure you can see everything clearly. Release the black tab and pivot the assy down while noting how it is retained in the black arm. As the assy comes free from the left mount the spring will come adrift, use tweezers or a spring-hook (make one from a paper-clip) to extract the spring. Now you need to twist the assy to free it's plastic hook from the black arm. Don't force it or it may break. If you manoeuvre it correctly it will come free easily.
Once it is out, you can either replace it if you have a new one, or rotate the tyre to get a new working surface. (This tyre-rotation trick can work with any 'D' typer paper feed roller)
Reassembly is pretty-much the reverse. Get the small black hook back into the arm first, then get the large roller hub into the lh mount. Now you need to refit the spring which may be fiddly depending on how dextrous you are with your fingers and tools. It's not hard and fits into a recess in the upper frame and over a round pin on the assy.
Once the hook and spring are in place, lock the rh side back into the black clip. Check the assy to make sure it trns freely and that the spring is applying downward pressure.
Now you can slide the shaft back into the hub, press the white bearing back into the frame and make sure you rotate it TOP to FRONT to lock it into place. Turn the rollers so that the flat sopt on the metal shaft is facing up as Tom noted. Refit the Black plastic gear and the Bias spring, covers, metal shield etc.
Hope this helps.
Cookee
Hi Tom!
ReplyDeleteI am new to your site. But really take pleasure in it. Your post is quite informative, I just to add Circular Technologies is an established US manufacturer of Timing Pulley, Timing Belt pulley, Roller assembly, bearings and Urethane Rollers. For more info just click the link.
Thanks!