About pin 21 of SEQ core

Testing/Troubleshooting
1

What should one measure at this point (PIN21 of PIC) when the power’s off? I measure ground there. Is this Ok?

When the power’s on, I see a “not so nice” “puls” on the RC pin.

The SC pin “puls” is much nicer.

Having some problems starting the interface of my SEQ…

Cheers,

Tom

2

Hi Tom,

how do you measure the pins, with a scope, or just with a multimeter?

I would propose to check the continuity when all ICs are removed from the sockets. In this case, you shouldn’t measure a “short” between pin 21 and ground (measuring result: > 0 ohm or even maximum resistance)

Note that there is a troubleshooting page: http://www.midibox.org/dokuwiki/doku.php?id=din_module

Best Regards, Thorsten.

3

I removed the PIC, still ground. disconnected the leds, no longer ground.

I’ve got a dout problem. But the din’s are working now :wink:

Cheers,

Tom