hat
Sèvi ak yon multimeter pou mezire si wi ou non vòltaj pwodiksyon nan chak tib ranje se nòmal (metòd mezi multimeter: konekte plim an mèt nwa nan GND ak plim la mèt wouj ki mezire vòltaj la nan chak peny); Si se konsa, jije ke se tèminal la pwodiksyon ranje dekonekte soti nan PIN la korespondan modil; Si ou pa, mezire si fen nan liy nan anndan an se nòmal; si se konsa, tib liy lan kase epi ranplase li avèk menm kalite tib liy lan; si se pa sa, detèmine si fen pwodiksyon korespondan HC138 la nòmal; si wi, detèmine fen pwodiksyon HC138 la ak liy tèminal Dèt tib la louvri; si se pa sa, li jije ke HC138 move.
eng
Use a multimeter to measure whether the output voltage of each row tube is normal (multimeter measurement method: connect the black meter pen to GND and the red meter pen to measure the voltage of each pin); if so, judge that the row output terminal is disconnected from the corresponding module pin; If not, measure whether the input end of the line tube is normal; if so, the line tube is broken and replace it with the same type of line tube; if not, determine whether the output end of the corresponding HC138 is normal; if yes, determine the output end of the HC138 and line The input terminal of the tube is open; if not, it is judged that HC138 is bad.