Samsung washing machine electronic unit repair

Samsung washing machines are among the highest quality on the home appliance market. But like any other device, they can fail. In this article, we will consider the reasons for the failure of the electronic unit of the machine, as well as methods for dismantling and repairing yourself.

Modern washing machines are distinguished by their high quality and versatility.

However, the washing machine control module sometimes fails much earlier than we expect. This happens for a variety of reasons.

• Manufacturing defects... Even visually, it is possible to determine low-quality soldered contacts, delamination of tracks, an influx of flux in the zones of the main chip. This reason is rare, but if it occurs, it is best to apply for warranty repair to the service. Do not dismantle the module yourself. As a rule, a breakdown appears during the first week of using the unit.
• Power supply voltage mismatch... Power surges and surges lead to overheating of the tracks and breakdown of delicate electronics. The parameters that must be observed when using this technique are indicated in the instructions.
• Deviation in the operation of one or several sensors at once.
• Moisture... Any ingress of water into the electronics is highly undesirable and detrimental to the washing device. Some manufacturers, by sealing the control unit, try in every possible way to avoid this problem. Moisture contact will oxidize the board surface. When there is water there, the control is automatically locked. Sometimes this breakdown is eliminated on its own by thoroughly wiping the module and drying the board.

All other reasons also include: excess carbon deposits, the presence of conductive faeces from domestic pests (cockroaches, rodents). The elimination of such problems does not require much effort - it is enough to clean the board.

It is not difficult to diagnose problems with the control module.

There may be several signs that the control board needs to be repaired, namely:

• the machine, filled with water, immediately drains it;
• the device does not turn on, an error is displayed on the screen;
• on some models, the panel LEDs flicker or, conversely, light up at the same time;
• programs may not work properly, sometimes there are failures in the execution of commands when you press the touch buttons on the display of the machine;
• water does not heat up or overheats;
• unpredictable engine operating modes: the drum rotates very slowly, then picks up maximum speed.

To inspect for a breakdown in the "brains" of the MCA, you need to pull out the part and carefully examine it for burns, damage and oxidation, for which you will need to manually remove the board as follows:

• disconnect the unit from the power supply;
• shut off the water supply;
• remove the cover by unscrewing the screws at the back;
• pressing the central stop, pull out the powder dispenser;
• unscrew the screws around the perimeter of the control panel, lifting up, remove;
• disable chips;
• unfasten the latch and remove the block cover.

As it turned out, it is quite easy to remove the control unit. As with all washing machines, the same scheme applies to Samsung. But sometimes the machine is equipped with foolproof protection - the terminals cannot be put in the wrong position. When dismantling, you need to carefully monitor what and where is connected in order to correctly install the repaired module back. For this, many take pictures of the process. - this simplifies the task.

Sometimes special skills are required to repair the electronic control unit of a washing machine.

Determining the need for specialized intervention is fairly straightforward. It is indicated by a number of the following reasons:

• a changed color in some areas of the board - it can be darkening or tan;
• the capacitor caps are clearly convex or torn in the place where the crystal notch is located;
• burnt-out lacquer coating on spools;
• the place where the main processor is located became dark, the legs of the microcircuit also changed color.

If nothing from the list was found during the check, then you can proceed to the repair yourself.

There are several separate types of breakdowns and, accordingly, ways to eliminate them.

• Program installation sensors do not work... Occurs due to salty and clogged contact groups in the regulating knob over time. In this case, the regulator turns with effort and does not emit a clear click during operation. In this case, remove the handle and clean it.
• Carbon deposits... Typical for long-purchased washing units. Visually, it is very simple to distinguish: the coils of the mains filter are "overgrown" with soot in large quantities. It is usually cleaned off with a brush or paintbrush.
• Interference in the operation of the door lock sensor... They are caused by soap residues that build up over time. The unit needs to be cleaned.
• After a short start of the motor, failure and unstable cranking... This could be due to a loose belt drive. In this case, you need to tighten the pulley.

It is worthwhile to independently disassemble and repair the control board only when the warranty period has expired. If a breakdown occurs, the module must be removed, but in the absence of proper skills in working with electronic equipment, it can be completely replaced.

How to repair the module of the Samsung WF-R862 washing machine, see below.