There is provided a plurality of component mounting apparatuses for sucking a plurality of components by a mounting head section and successively mounting the components onto a board located at a board positioning section. The baffle plate confines plasma into the upper portion of the chamber, and at the same time, constitutes a return route of a return current to a high frequency power source. A main cable extends about a portion of the pulley wheel. A boot unit boots the selected provisioning computer using the boot image stored in the selected storage device. Each portable device detects the IR location codes and, if one of the IR location codes is detected, transmits an output signal including a portable device ID representative of the portable device and the detected IR location code.