| 摘要 |
PROBLEM TO BE SOLVED: To provide a control board box wherein illegal change of an ROM can be prevented. SOLUTION: In a case that an ROM 12 wherein a control program or the like is stored is detachably mounted on a printed wiring board 10 via a socket 13 or the like, the ROM 12 is made undetachable with preventing mechanism for detaching such as a frame 40, a cylinder part, a protruding part and a band, independently of the seal of a case 20. Thereby illegal change of the ROM 12 can be effectively prevented. |
