Repairing with JTAG

How to JTAG ? Following is a complete set of instructions for how to repair your receiver with JTAG. I have performed the JTAG operation on my Pansat 2700A using both Skymax and jKeys and documented some of the screen shots so that you can see what things should look like. Some of the information seen in the screenshots may vary between my receiver and yours.

Well, let’s get that receiver REPAIRED!!!! The first thing you need to do once you receive the cable is determine how you will connect it to your receiver. You either need to have the header already installed in the board, or you need to install the header I supplied with the cable.

If it is installed already, good. If not, here are some tips to help you install the header. I
don’t mind sharing tips on how to solder better, but this is not, nor is it intended to be, a lesson in soldering.

If you have no pins, but holes, you will need to take the signal (green) board out to solder in the header I include. Sometimes it is possible to take the board out just far enough to allow it to be turned over without disconnecting everything, sometimes you need to disconnect everything.

If you have solder in the holes (this sometimes happens) you will need to get some solder wick/desoldering braid (Radio Shack catalog number 64-2090, $3.19) and use it with your soldering iron to remove the solder.

Tip: When the circuit boards are designed, the header pads or silkscreening are designed to show pin 1. In some cases, the pad for pin 1 is square, while the rest are round. In other cases, the silkscreening will show a rectangle around the header holes, and the corner with pin 1 will look cut off.

Now that your signal cables are hooked up, hook up the ground clip (various colors). Check the ground. Wiggle the alligator clip a little bit so that it bites through any coating that may be on the case or frame of the receiver.



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