apache-labs.com

My ANAN-10 stopped using the internal 10MHz TCXO reference, which ends up pulling the ADC clock off by about 100ppm. It works OK using an external reference. I need the schematic (and hopefully board layout) in order to troubleshoot.

I initially suspected how the 10MHz TCXO was soldered to the board and ended up reflowing those connections but that didn't solve the problem. I am able to confirm that the 10MHz from the on-board TCXO is getting onto the board but then it disappears.

I sent email to Apache Labs support mailbox but that bounced with "mailbox full". I remember when someone posted the design for this but it was about 10 years ago and doesn't seem to be in the archives.

Thank you for your help.

It would appear you did not look at the schematics section of this forum...

viewforum.php?f=35

Thank you. Before I asked I searched the site. I evidently used the wrong keywords. After much additional effort I did find it referenced in another message. Still haven't found the schematics section. Where might one look for that?

Thank you.

Brian,

Did you not follow the link I put in my first post above? If not, why not?

73,

Scott

Direct link to the schematic.
download/file.php?id=18

Thank you both for the links. Problem located. Bad diode. Diodes on order from Mouser.