A PCB assembly includes a panel including at least one guide protrusion, at least one mounting portion, and at least one dislocation prevention protrusion, and a PCB including at least one guide hole formed to correspond to the at least one guide protrusion, at least one grounding portion formed to correspond to the at least one mounting portion, and at least one dislocation prevention hole formed to correspond to the at least one dislocation prevention protrusion, wherein the PCB is guided to slide by the at least one guide protrusion and the at least one guide hole, is brought into close contact with the panel by the at least one mounting portion and the at least one grounding portion, and fixed to the panel as the at least one dislocation prevention hole is supported by the at least one dislocation prevention protrusion.