engelmann SensoStar A Instructions De Montage Et Manuel D'utilisation page 51

To remove a module the upper housing piece must be carefully pressed against the rear panel of the lower housing
piece during opening the calculator. Thus the two rear snap-fits of the upper housing piece lever out the module of
the PC board (see picture 4).
Page 51 of 79 Article no.: 1080621031 2022_02_02 Subject to technical change! Errors excepted.