Bob,
It's the CAN-Do PCB with the 40-pin header on it that normally would solder to the main PCB - the one with the EMI problem. I really didn't want to mess with the first one but no one stepped up to look into the EMI problem so I finally gave up and decided to do it myself. I wish I hadn't.
Now that one is dead and the replacement from Stephen appears to work but the receiver isn't initializing. I don't want to touch this receiver until I have completely ruled out a bad replacement CAN-Do module by trying another one. I'd rather build up a second receiver from scratch than start desoldering parts from this one. That is a huge effort to be doing right now. I also don't have all the parts I need so I'd have to pull some from this receiver. The chance of making things worse is very real if I have to dig into the receiver. Trying a third CAN-Do module has no risk.
73, Juan
-----Original Message----- From: Robert McGwier [mailto:rwmcgwier@gmail.com] Sent: Sunday, September 16, 2007 9:32 AM To: juan-rivera@sbcglobal.net Cc: 'Stephen Moraco'; David Smith; Dave Black (Work); Dave Black (Home); eagle@amsat.org; Samsonoff@Mac. Com Subject: Re: [eagle] Re: 70 cm receiver inoperative with new CAN-Do module - More
Juan:
What kind of Can-Do module do you have?
We need to get this done so it can be presented as our one success this year at the annual meeting. Let's push this through.
Juan Rivera wrote:
Stephen,
All of the receiver power supplies are functional. My setup has not
changed
for a long time. I'm using the same cable harness and power supply as always. Communications are via a USB port, to a USB-to-serial dongle, to the CAN232, to the CAN-Do module. This has not changed since day-1.
The CAN-Do Net Controller Software is the same installation I've been running successfully for months. It appears to run as before. It finds
the
CAN232 immediately and then finds your module when I click the Query
button.
As I said in my earlier email, I'd like to completely rule out a bad
CAN-Do
module before tearing into the receiver, especially this close to the symposium. I'm willing to try anything you suggest, but if you have
another
module available I'd like to try that first.
I agree with this.
73,
Juan - WA6HTP
Bob