Microwave touchpad does not respond

Issue description:

Let's consider the reasons why the touch buttons are not pressed on the microwave, and the ways to eliminate them.

The touch panel is a multilayer film on which non-protruding buttons are displayed on the front, and inside there are conductive tracks that activate the buttons. Let's consider the reasons why the touch buttons are not pressed on the microwave, and the ways to eliminate them.

The touch panel is a multilayer film on which non-protruding buttons are displayed on the front, and inside there are conductive tracks that activate the buttons.

Such electronics are sensitive, do not tolerate rough handling, and often fail. The main causes of malfunctions: violation of the integrity of the conductive paths

sticking of the touch panel contacts

poor contacts at the junction of the keyboard cable and the control unit connector.

Another common cause of the problem is contamination. In the kitchen, the buttons of household appliances inevitably become dirty and eventually stop responding to pressing. In this case, it is enough to carefully wipe them from the outside from dirt. Such electronics are sensitive, do not tolerate rough handling, and often fail. The main causes of malfunctions: violation of the integrity of the conductive tracks; sticky touch panel contacts; violation of contacts at the junction of the keyboard loop and the connector of the control unit. Another common cause of the problem is pollution. In the kitchen, the buttons of household appliances inevitably become dirty and eventually stop responding to pressing. In this case, it is enough to carefully wipe them from the outside from dirt.

Solution:

You can restore the microwave touch panel yourself. For repair you will need: a set of screwdrivers; knife; electrical tape or tape; alcohol for degreasing; conductive adhesive; multimeter to check connections. Before work, be sure to disconnect the device from the network. However, even in this state, electric current builds up in some elements, so it is important to proceed with caution.

To gain access to the panel, the oven is disassembled: Unscrew all the bolts on the front panel of the case (they are even on the bottom). Remove the front panel of the case. Unscrew the protective panel, which will open access to the control unit. Disconnect the ribbon cable connecting the control unit and the touch panel. Gently pry the thin touch keyboard with a knife. The keyboard is carefully peeled off: with a thin clerical knife they pry the corner of one of the films, pick it up with your fingers and smoothly detach it from the base. A film with conductive paths will open.

Damage to conductive paths The film with paths is inspected for oxidation of the contacts and damage to the conductive paths. Particular attention is paid to the areas where the buttons are not working. The damaged conductive track is restored as follows: The surface is thoroughly degreased. Conductive glue is applied. Leave to dry. The tracks are checked for conductivity with a multimeter. Assemble the device in the reverse order. If no conductive glue is available, a soft pencil will do. The damaged area is drawn with a slate pencil. If you need help with high end microwave repair, call us right now!

Microwave touchpad does not respond

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