An interesting DSP problem in an XTS3000

[PhillyPhoto]

I got a 3000 of ebay and all I needed was the RF board, and that works fine. But while testing the original out, I noticed it didn't power on. I switched out the individual components to my other radio and determined it to be a bad DSP board. It looks like it has some spots of corrosion. I was bored today, and for laughs I tried to read it with the cps. Lo-and-behold, it read it! Below are from tracking tab on the Radio Information page:

Version Information
Codeplug: 000C
Firmware: 07.13.00.00
DSP Software: R00.00.00

So, my next question is, has anyone seen this before? If so, would a simple firmware upgrade take care of it, or is it back to the depot? Can the individual DSP board be sent back, or does the whole radio need to go? If it needs to be sent back, I'll probably just keep it for parts, but it it needs a firmware upgrade, I can keep an eye for another UHF board, and keep it.

Another question I have is as far as the controller goes, it's from a model I, and when I power it on in the good radio, the green rx/tx led never lit up, but my other model III's do, so is this normal in a model I?

None the less this was the weirdest thing I've seen as far as XTS3000s go.

[PhillyPhoto]

Here's a screenshot from the CPS:

[Elroy Jetson]

The DSP isn't reading at all. OR, the radio has a conventional only feature set. What was the flashcode? 000001-000000-9?

I think there's no need for DSP in a purely analog radio. I could be wrong, though. If so, it's good to find out anyway.

Elroy

[PhillyPhoto]

The DSP isn't reading at all. OR, the radio has a conventional only feature set. What was the flashcode? 000001-000000-9?

I think there's no need for DSP in a purely analog radio. I could be wrong, though. If so, it's good to find out anyway.

Elroy

It is an analog only flashcode of 000001-002000-5. I was under the assumption that the DSP in the ASTRO line handled voice whether it was analog or digital. I could be wrong however. The weird part about it is that it never comes out of the self-test, because I have it set to do the "Power-Up Self Test Alert Tone", however switching the DSP board fixes this problem. Like I said before, it had some corrosion it looks like, so that might be the issue.

[Elroy Jetson]

Clean the board carefully and thoroughly using a toothbrush and toothpaste, and water.

YES, I mean that. Toothpaste is a mild abrasive and a toothbrush won't do any damage. This will effectively clean
away a lot of the corrosion but probably can't get to any that's hidden under some parts.

That might be enough to bring the board back.

I've had success with this procedure before. Several times, actually.

Be sure to thoroughly rinse the board, then dry it as much as possible by hand, then dry it out entirely in
a WARM (no more than 200 degrees) oven for a while. Then try it out.

Elroy

[PhillyPhoto]

I tried the old eraser trick at first but that didn't work. I just cleaned it up with some toothpaste, and will dry it out at work. How long should I leave it in for?

[PhillyPhoto]

I dried it out, and still no luck.

I did however take a display from a good radio and put it on it. After the self-test, it showed a "fail 02/" error, but I wasn't able to get it to show that last 2 digits.

[The Pager Geek]

The DSP isn't reading at all. OR, the radio has a conventional only feature set. What was the flashcode? 000001-000000-9?

I think there's no need for DSP in a purely analog radio. I could be wrong, though. If so, it's good to find out anyway.

Elroy

Even analog needs DSP. It's been covered many times.

As for the radio, fail 02/90 is DSP hardware failure. That's most likely going on.
EITHER:
It was somehow erased and not reloaded. (Unlikely)
or
DSP Hardware failure and needs to be replaced.


tpg