hat
Kab la 26P ant tablo yo inite (broch 1, 2 nan kab la 26P yo siyal wouj, ak broch 3 ak 4 yo se siyal vèt) ak pwodiksyon an nan tablo a inite anvan (metòd jijman: pran yon long 26P kab Si- echanj koneksyon se nòmal, li jije ke gen yon pwoblèm nan do a; otreman, gen yon pwoblèm nan devan an) Èske li nòmal? Si se konsa, Lè sa a, mezire siyal la wouj D 'nan HC244 a, ak si wi ou non 14 peny a voye bay HC595 a se nòmal apre kondwi a (si se wi, ak lòt Si broch yo tout nòmal, Lè sa a, HC595 la ap jije yo dwe move. li ak yon sikwi entegre nan menm kalite.Si ou pa, Lè sa a, tcheke kab la 26P pou pwoblèm ak D 'a se nòmal.
eng
The 26P cable between the unit boards (pins 1, 2 of the 26P cable are red signals, and pins 3 and 4 are green signals) and the output of the previous unit board (judgment method: take a long 26P cable If the cross-exchange connection is normal, it is judged that there is a problem in the back; otherwise, there is a problem in the front) Is it normal? If so, then measure the red signal input to the HC244, and whether the 14 pin sent to the HC595 is normal after the drive (if yes, and other If the pins are all normal, then the HC595 is judged to be bad. Replace it with an integrated circuit of the same type. If not, then check the 26P cable for problems and the input is abnormal.