Question about HP DeskJet 648c InkJet Printer
Deskjet 648c was working fine yesterday morning, but now, when power on button pushed, light does not come on. Cartridges replaced a few weeks ago and working well at that time. Now cartridges are "resting" in the center of the opening (i.e., in the center of the paper)
Cleaning the print shaft:
1. This is a round shaft that runs through the ink carrier.
2. Lift the cover as in replacing ink cartridges
3. Unplug the machine with the carrier out in the middle.
4. Move the carrier to the right and out of the way. You did the above so you can move the carrier back and forth. Otherwise it is stuck to the right over the purge unit.
5. Using a clean cloth wipe down the print shaft. Move the carrier as needed to get it clean. I believe the people on this site recommend tri-flow lubricant. But I have found even three in one will work for awhile. Put a few drops on the shaft after it is clean to lubricate the carrier. Make sure it moves back and forth easily.
Cleaning the encoder:
1. While your inside clean the encoder strip. It is a plastic strip that is directly above the shaft you just cleaned.
2. You can use plain water or windex to wipe the plastic down both sides moving the carrier out of the way so that you can get to all of it. It will come off at the ends so try not to pull on it too hard. What I do is pinch it between my fingers using a paper towel and water, than lighty moving the towel left to right, wiping as I go, till I get to the carrier. I than move the carrier to the left and continue washing to the right. You may have to do this more than one time to get it clean.
Cleaning the feed rolls:
1. The equipment is still turned off and the carrier is free.
2. Open the cover and remove the exit tray and any paper in the bottom tray. Most trays just pull out. Some have a lever at the bottom. Not sure on this model.
Look for the three large black or gray rollers at the back where the paper goes in. You need to turn these rollers and clean them. Water will clean them enough usually to do a temp fix for paper jams. But to clean them right you need to use a rubber cleaning fluid. What I use is Lacquer Thinner. But Fedron, Rubber roller cleaning liquid from an electronic store and other things will work.
3. You must take a small amount of your cleaning fluid and apply it to a rag. Clean what you can see of the rubber than I usually pull up on the roller and clean the next section. Note this is against the direction that the machine turns but will not damage anything on this machine. It is hard to do the turning as you are actually turning the motor through an intermediate gear. It will turn. When you have cleaned all the rollers all the way around than remove all items you have used to clean the machine. Plug the machine back in and let it go through its reset. Should be ready to print.
On your machine as the symptoms didn't sound like rollers you might try just doing the first two things. Likely will fix the problem.
Posted on Jun 20, 2009
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Posted on Jan 02, 2017
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