Batboard

Hello people! This is my first message in this board. I know batlabs site a several years...

My question:

Have a GM300, model M33GMC29C1 with corrupted codeplug because power failure during programming.

But recover using the technique described in the page http://www.batlabs.com/gm300.html

However I had to do the recovery with a codeplug of different model. Verify the model according to the table, says my radio is 25W and 136 to 162MHz, 16 channels.

I used codeplug M33GMC29C2, but something strange happened, the radio work ok with two channels, if add more than two channels error occurs the radio emits a long low beep and the display shows "P5".

In another attempt used an codeplug M33GMC20D2, of 8 channels and worked perfectly, even changing to expand to 16 channels.

What this wrong? The M33GMC29C1 does not use a expanded logic board?

Or is some incompatibility with the M33GMC29C2, despite my board probably be 16 channels?

Thanks, Luciano.

You can blank the GM300 logic board and perform a full initialization with the GM300 RSS, no codeplug required. Just follow the steps outlined in the following thread:

http://batboard.batlabs.com/viewtopic.p ... lank+board

Todd

Hello Todd,

I tried method described in this topic and no sucess. If blank serial number and place hex value on positions recomend, radio realy is blank, but GM300 RSS at try to read, show "this board is blank, not initialized".

Any idea?

Fudeba wrote:Hello Todd,

I tried method described in this topic and no sucess. If blank serial number and place hex value on positions recomend, radio realy is blank, but GM300 RSS at try to read, show "this board is blank, not initialized".

Any idea?

Um, yes, exactly. You then go into the "service alignment" screens and choose "blank board initialization". It will let you enter the serial number, and choose whatever model GM300 you wish.

Todd

Ok... Now initialize board's own RSS GM300, but this problem occurring.

If I try to add more than 2 channels, the problem occurs again, display shows "P5" and radio emit a low and long beep.

However decided disassemble the radio and look that repairs have been made on logic board.

The X2816 (xicor, memory eeprom?) and SC80556FN already have signs that were exchanged (much solder flux on pcb).

Possible that this board has been changed from 16 to 8 channels, and explains the whole problem?

My question: Like find out if the board is expanded or mask? Or... mixed?

Thanks, Luciano.

The masked board has just one square brain chip.
If it has eeprom in it, it is an expanded board and will also have a plug in eprom firmware.
What does the sticker on the removable chip say???

Sounds like someone "attempted" to fix it.

Hello MaxTrac,

Well... my radio not have any stick on chip on logic board. See this here:

http://i6.photobucket.com/albums/y212/Fudeba/061.jpg

Only SC80556FN have a two marks of pen (arrows), i suspect this mark has made by people as changed chips. Note that Xicor X2816 also has solder flux around him.

OK, that ver 25.01 chip is correct for the standard GM300.
What model number did you pick when you initialized it??

Make sure you pick one that is correct for your expanded board, IE has "9C" in the model number and NOT "0D" or "0A". See the chart at the bottom of the page here;
http://www.batlabs.com/gm300.html

If someone did replace the 2816, then look VERY closely with a loupe or soemthing to see if there are any solder bridges etc.

Well, it initialize board on RSS GM300 gives me options:

Product Line: Radius GM300
Model Name: Radius GM300
Range: 136.0 - 162.0
Model Number: M33GMC09C1 or M33GMC29C1 (selectable by arrow keys)
Panel Mumber: 005 (typed by me)
Serial Number: 159TWAN.598 (typed by me)

The number of model that the label on heatsink is: M33GMC29C1

At last will remove X2816 from board and put it back, not to doubt.

Only diference observed by 09C1 and 29C1 is channel step, I understand is not much relevant in this case.

I would use the "2" to match your radios step rate, not sure if it matters though...
Also do not put a period (decimal point) in your serial number, it should be 159TWAN598
Other than that, it looks OK.

So the radio works fine if only 2 channels are put into it???
Transmit and receive OK??
Will it scan?

I tested on 09C1 and 29C1 and results are same...

The decimal point is typing lapse eheh, in RSS i not entered decimal point in serial on RSS software.

Yes, radio work perfectly on two channels, transmit and receive. Sinaling MDC1200 work ok. I not tested Scan.

Hello people.

This message is conclusion of GM300 recovery:

After tests, X2816 is defective. After test on eprom programmer, acuse pin A18 problem/bad contact.

I changed X2816 to a new chip and problem resolved. GM300 is sucessfull reinitialized by GM300 RSS, after clear serial and place 1B and 4F on properly position.

Thanks to all for suport!

I'm glad to hear you got it working, and thanks for posting the resolution. Hopefully it helps someone else out in the future.

Todd

Ahhh... sorry for my lapse at typing... defective pin is A8 (number 29) not A18.

73's!