NOT WORKING CBM 3032

[Desperado]

F6 pin 14 is good?

 

[daver2]

F6 pin 14 looks fine.

That is our reference.

However, for F6 pin 2, you only have half of the waveform on the screen; and I can't see anything at all for F5 pin 11.

You need to slow down your timebase as we measure successive pins down the counter chain (i.e. higher-numbered SAn lines).

Dave

 

[Desperado]

You need to slow down your timebase as we measure successive pins down the counter chain (i.e. higher-numbered SAn lines).

It's not possibile!! i have end scale now ( 2 us)

 

[daver2]

No, SLOW it down - not speed it up!

Dave

 

[Desperado]

F6 pin2

 

[Desperado]

F5 pin11

 

[daver2]

Yes, spot on!

Now do, the rest...

I am on a webinar at the moment. If you can't work out what the remaining input pins are I will help out in an hour or so.

Dave

 

[Desperado]

Yes, spot on!

Now do, the rest...

I am on a webinar at the moment. If you can't work out what the remaining input pins are I will help out in an hour or so.

Dave

i am desperate, it's too difficult for me found correct inuput pins

 

[daver2]

F5 pins 11, 5, 14 and 2 (in that order) followed by F3 pins 2, 14, 5 and 11 in that order.

Dave

 

[daver2]

The 74LS157 is a very simple IC. Have you downloaded the data sheet for it and tried to understand it?

It is basically a 4-way 1 pole 2-way switch. Nothing complicated...

Dave

 

[Desperado]

Ok thanks so much!
So this is F5 pin 5

 

[Desperado]

F5 pin 14

 

[daver2]

You need to slow the timebase down again for F5 pin 14...

Dave

 

[Desperado]

F5 pin 2

 

[Desperado]

F3 pin2

 

[Desperado]

F3 pin14

 

[Desperado]

F3 pin5

 

[Desperado]

F3 pin 11

 

[Desperado]

F5 pin14

You need to slow the timebase down again for F5 pin 14...

Dave

I think that F5 pin 14 is bad! I can't see a correct signal also if i try to slow down timebase and turn on trigger

 

[daver2]

Why?

I can see part of the signal in post #52. Just slow the timebase down by 1 click from where it was.

Dave