PCB woyang'anira khomo ndi bolodi losindikizidwa (PCB) lomwe limayang'anira chitseko kapena zipata kuti zichepetse mwayi wopita kumalo enaake.Chitseko chowongolera chitseko cha PCB chimakhala ndi bolodi losindikizidwa lokhala ndi zigawo zosakanikirana (IC), kuphatikizapo transistors, capacitors, resistors, ndi zigawo zina, Door controller PCB ingaphatikizepo zina zowonjezera monga keypad, masensa, relays, ndi zigawo zina, Door controller PCB nthawi zambiri imagwirizanitsidwa ndi njira yoyendetsera mwayi, yomwe imalola ogwiritsa ntchito kulamulira mwayi wopita kudera linalake.