Thanks -- I pulled it out and there they are -- 73 Hank K7HP
----- Original Message -----
From: Pfizenmayer
To:
[hidden email]
Sent: Saturday, April 19, 2014 12:03 PM
Subject: K3 - FSK in not working - KIO3 boards
The voltage on the FSD in line is "floating" at about 3.2 volts and even finger leakage pulls it down so its from a very high sourfce impedance and does niot key the FSk.
I have tracked from J23 ACC connector to P90/J90 on the KIO3 Dsub RS232 IO board the PTT in , KEY out , AUX and all are the nominal 220 ohms shown on the schematic . Pin 16 FSK in is about 6 megohms. This would indicate that R2 220 ohms is open or something along that line is open .
My question is where the heck is R2 ? Or maybe more to the point - Is R2 on the back side of the horizontal board marked "KIO3 Remote I/O Module " with J23 (15 pin) and J24 (9 pin RS232) that then plugs into J90 on the KIO3 vertical Main board ?
I hate to pull all that apart and find its somewhere else ?? Of course it could be a lousy solder joint somewhere in the run (incidentally the 5v is solid at pin 20 J90 and at pin 3 of J35/P35 on the RF board.
Thanks - if I don't hear anything guess it will be tear it apart and see !
Hank K7HP
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