Batboard

Hello all. I have a problem with a GM300. The unit seems to work just fine, no error tones on wake up or anything like that. When I try to read the radio (with my all Motorola, DOS only 486-25 setup) it immediately gives me the following error:

Serial bus error:
#7 - Invalid Opcode

I have many other GM300s here which read just fine, so I know it's the radio. I have tried swapping the control head with another, no difference. My RSS is the latest version 5.00.00

I was hoping someone on the board had some further suggestions before it goes off to Motorola. Many thanks.

Todd

Is this a new one? Ever read it before? I had that message once..I shut everything down..took all cables off, then on .re-booted pc..everything! check all contacts. and it read the radio! unless you did that..then I suspect the radio...In looking over batlabs, 3 more ideas are on the site: rib voltage, re-install the RSS, use a backup copy of the .mdf file

<font size=-1>[ This Message was edited by: radioEd on 2002-01-15 15:37 ]</font>

<font size=-1>[ This Message was edited by: radioEd on 2002-01-15 16:16 ]</font>

Thanks ED, I guess I should have mentioned I also checked on Batlabs. So far, 3 different computers, 3 different RIBs. Off to Motorola it goes, I guess.

Todd

On 2002-01-15 19:48, wavetar wrote:
Thanks ED, I guess I should have mentioned I also checked on Batlabs. So far, 3 different computers, 3 different RIBs. Off to Motorola it goes, I guess.

Todd

And the other GM300's read ok? Well it must be the radio! I ordered 60 MTX8000's & two had problems & went back to moto! good luck! Ed

Hi:

Chances are very high you have corrupted
the code plug in the radio. Restoration
of a GM300 Logic Board requires some special
tools and time...

I can resore them for 1/2 of what Motorola
Charges...Typically around 125.00

MS

Just had to say, But mean NO disrespect to ANYONE. I don't think HE corrupted the c/p.
SOmeone else could have done it, or it could be a Freaky //otorola thing.

My 1 cent.

It would be nice if he had a warranty on it! He says he has many others. I don't know if he has a shop/business...whatever..

<font size=-1>[ This Message was edited by: radioEd on 2002-01-15 23:37 ]</font>

I got one off ebay that had that problem. After a lot of checking I found that there was a little corrosion on the mic jack connectors. After a lot of cleaning I got the radio to read.

Walt

Well Walt, I hope Todd checks your post before he ships it to "moto"! on a longshot, it may work! I was lucky, I took off all the other cables.....Ed

Hey, if all else fails, send it to Monte. He KNOWS how to restore corrupt "code plug" information in the radio.

Hey guys! Thanks for all the suggestions. I do work at an MSS, so I have plenty of experience & many spare parts to swap around. It is a definite logic board problem, as another works fine in the radio. A corrupted codeplug is a possibility, although I have no idea how it would've become that way. We programmed it nearly 5 years ago with a DOS only 486-25MHz, it hadn't been touched since. So, my offer to send Monty my first corrupted codeplug still stands ...but I don't think I did it in this case! Unfortunately, the customer requires new frequencies put in, so off to "M" it must go. Thanks for the offer Monty, but our flat-rate repair cost is $253 Canadian, with no border hassles. I'd have to pay nearly that much just to send it over the border to you! Not to mention $125 American is about a million Canadian

I suppose I could try swapping out the codeplug IC (U805)...I've repaired many bad MTX800/810's by doing that...sigh... decisions, decisions.

Todd

<font size=-1>[ This Message was edited by: wavetar on 2002-01-16 10:38 ]</font>

Hi Todd:

After reading some additional information,
I suspect your radio may have a Bad Componet.

Although Extremly Rare, it does happen from
time to time.....

You might " Try " Pressing on the Logic Board
during the Read mode....That maybe show-up
a problem....Out of the 100's I have restored, I did see that on occasion,and the
problem was located to a Cracked PC Board, and sometimes a Cracked Componet.

Customer Failed to mention the vehical the
radio was in was totaled in a accident. I was
wondering about the saw blade teeth marks...

They had to use a Hack Saw to get the radio
loose....

Anyhow , give that a try.

Also, ya, those GM300's are a real pain to
fix ( thanks to our Motorola team ) BUT it
CAN be done outside of the factory !!

You must get a special deal....

Here in the US, the Flat Rate Repair on GM300's is $240.00

MS

Thanks Monty, I'll give that a quick try, you never know. Our pricing is the standard Canadian Flat Rate, that's one thing we seem to get a bit of a break on up here compared to the U.S. I'm not sure why, because the radios retail for a hell of a lot more (never did hear from Jim as to what "cheaper" Motorola equipment he thought was available up here).

Todd

I've been waiting weeks to post this

All it took was a customer who wasn't in a hurry for the unit, some spare time out of a busy schedule & a 'scope. Turns out it was a defective transistor, Q817, in case anyone comes across this trouble in the future.

Todd