Found small mistake in the schematics. Inadvertently used chip 74LS01 with open collector. Should have used Simple NAND gate 74LS00. To fix this one simple way is to replace it with 75LS00. But PCB is already done. And pinout of 74LS00 chip is different. So the simplest other fix - is to put small pullup resistors about 1 k,  between outputs of 74LS01  pins 13 and 10 and +5 v to pull pins up.