Talon2000
Well-known member
Got a BZ the other day.
It had no tank engine sound. After tracing through the circuit I found that it had a bad 555. Replaced and all is good. But in the middle of the game, no more engine sound.
Motor en are both high. and the 555 is sending clk. But I'm not getting anything out on pin 15 of the ls161.
I've done the normal things, egde con, interconnect, seated / cleaned pokeys, and arrays, and custom chips.
R11 has been checked, as I know this controls the frequency.
Ideas?
It had no tank engine sound. After tracing through the circuit I found that it had a bad 555. Replaced and all is good. But in the middle of the game, no more engine sound.
Motor en are both high. and the 555 is sending clk. But I'm not getting anything out on pin 15 of the ls161.
I've done the normal things, egde con, interconnect, seated / cleaned pokeys, and arrays, and custom chips.
R11 has been checked, as I know this controls the frequency.
Ideas?