Do-it-yourself mfp repair

In detail: do-it-yourself repair of the mfp nr from a real master for the site my.housecope.com.

This MFP was bought by me several years ago. I stopped at this model about the reason for the possibility of refilling cartridges. Specifically purchased a set of refillable HP178 ink cartridges (bought HERE), as well as an OCP ink kit (bought HERE). The overall impression of the HP B110B MFP is excellent. BUT. I don’t know how ordinary users use it, I have constant problems with repairs. Once I even turned to the workshop - they told me to throw it out. I've been throwing it out for about a year now. Super masters do not want to work even for money.

Image - DIY mfp repair

The main breakdowns in the HP B110B MFP are the loss of contacts in the carriage loops and loose contacts in the places where the cartridges are installed. The cost of printing is a penny. The print quality is excellent even with cheap ink. Several times I was trying to buy a new MFP, but ……
The first repair was to replace the print head. I did not find the head in Russia and ordered it from China. Who needs a head press HERE... The installation of the head was also with dancing with a tambourine. Bottom line: it works to this day and most likely the old head was also good, but the problem is in the trains on the carriage.

Here's how to quickly disassemble the HP B110B MFP.

Reason for disassembly: HP B110B MFP DOES NOT SEE BLACK CARTRIDGE.

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Lift the lid of the HP B110B MFP, the head will park in the lid open position.

Image - DIY mfp repair

We unscrew 6 screws and here is the first surprise. Two screws cannot be unscrewed just like that - the cover of the SCANNER UNIT interferes.

Image - DIY mfp repair

Image - DIY mfp repair

In addition to the screws, the side covers sit on 3 more latches on the bottom of the printer.

Image - DIY mfp repair

On the left side, after removing the cover, disconnect 2 white and black cables.

Video (click to play).

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On the right side, unscrew the stopper fixing screw.

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Lifting up, remove the scanner and put it to the side. We don't need it yet.

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Now we have access to 2 problem screws. We wrap them up and remove the lid.

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This is what the HP B110B MFP looks like from above. The head, carriage and cartridges are already available to us.
If the problem is in the loops, then we already have access to them. Repeatedly I inserted these loops back, and after some time of work they left again.

Image - DIY mfp repair

Image - DIY mfp repair

If the problem is not in the loops, then we continue the analysis of the HP B110B MFP. We remove the cartridges. We do not leave them open for a long time. I don’t use lids, because I’m working on disassembly with my eyes closed and they don’t have time to dry out. The same goes for the head.

Image - DIY mfp repair

Image - DIY mfp repair

If you are going to remove the head train, keep in mind that there is a movable silicone stop under the train. I forgot to take a picture of him.

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To remove the carriage, loosen the toothed belt tensioner.

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Remove the left and right cotter pins securing the carriage shaft.

Image - DIY mfp repair

Image - DIY mfp repair

We remove the shaft by pulling it out to the right.

Image - DIY mfp repair

Image - DIY mfp repairImage - DIY mfp repair

We can now raise the carriage. Complete freedom of action.

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Checking the ribbon cable

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We disassemble the carriage. To do this, release the head holder - remove 2 springs.

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Remove the cover that covers the board. It has 2 latches and can be easily pry off with a screwdriver.

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Unscrew 1 screw securing the printed circuit board. And we remove the fee.

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Examining the board for micro cracks

Image - DIY mfp repair

Image - DIY mfp repairImage - DIY mfp repairImage - DIY mfp repair

Now we remove the cartridge contacts board. There are only 6 latches, 3 on each side. Spring plate keep this in mind.

We get access to the cartridge contacts board. In my case, the reason is precisely in this board. We clean up contacts

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We check the moving contacts. They can be easily rearranged among themselves.

Image - DIY mfp repair

We assemble in the reverse order. The disadvantage of this assembly is that the loops are not fixed in any way. Thus, they bring unnecessary trouble to the owner of the HP B110B MFP.

This assembly - disassembly helps even if various ink system failure errors pop up:
0x19a0013
0x19a0003
0xc19a0020 and so on.

From time to time, printer owners encounter malfunctions. Most people have independently acquired personal experience in eliminating the minor flaws of such a device.As practice shows, a frequent reason for the unwillingness of the printer to work may be a software failure or a minor malfunction in the mechanical part, which can be eliminated independently, without seeking help from a specialist.

Let's consider the probable causes of malfunctions and how to eliminate them on our own, without resorting to the help of another person.

The device of printers such as HP, Canon, Epson, Samsung, Sharp, Ricoh is fundamentally the same. Therefore, we will consider several reasons that are found on all printing devices:

  1. After the printer gave you the information about the error, first of all, check the presence of paper in the loading tray, whether the paper is jammed, the presence of toner in the cartridge, whether all the covers on the printer are well closed and, of course, the connection to the network and to the PC.
  2. A common problem that you may not be shown is a software glitch.
  3. One of the most common malfunctions is contamination of the mechanical parts of the device. First of all, you need to disconnect the printer from the power supply, open the top cover where the cartridge is located, take it out and visually inspect both the cartridge itself and the mechanisms in the field of view. In case of contamination of the mechanism, you just need to wipe it off with cotton napkins, slightly moistened with water. In hard-to-reach places, cotton swabs will come to the rescue.

Important! In no case should you use detergents and liquids containing alcohol.

In addition to all of the above, listen to the operation of your device. Are there any extraneous noises coming from it? If you hear them, this could be a signal that the gears that activate the printing mechanism are out of order. In most cases, they are made of plastic.

Below we will consider how to make repairs using the example of an HP LaserJet 1100 printer. This manual will also be useful for repairing Canon, Samsung and Epson printers.

Suppose the thermal film is damaged during printing with a paper clip on the sheet. For repairs, you need a small set of tools:

  • crosshead screwdriver;
  • flat thin screwdriver;
  • pliers with long jaws;
  • wet wipes or cotton-dampened pads.

Having prepared the necessary tool, we proceed to repair the device: