P200 With Wrong Code Plug

[Daniel Watson]

Dummy me! I put in by mistake a VHF code plug into a low band 403-433 MHz. The model number of the sick radio is H44RFU7160BN. I can now read the radio but cannot write to it. I have tried changing the band to no avail. Its current state is no lights, dead and I don't have a code plug or another radio to clone the right code plug back into the radio. ANY WORK AROUNDS?

[raymond345]

Hi there eMail me about the dead P200

Raymond345

eMail [email protected]

[Monty]

Dummy me!

No need to comment here !

ANY WORK AROUNDS?

Take some Asprin

Hi:

Kidding aside, there are a few things you can
do so long as you have a Stable Program Platform.

1. If you have a "Copy" of the Old Code Plug, try reloading
that back into the radio

Note: This will only work when having a good programming
station like a 386 Computer using DOS 6.00 ~ 6.22 and
preferably a Motorola Rib Box and a good Factory or Clone
Program Cable.

Using the latest version RSS is ideal too....The older Version
was not written well at all.

2. If that does not work and YOU MUST BE CARFULL HERE is to
disable P1 and or P2 at the bottom of the Controller that goes to
the VCO Block. And while disabled, try and program the radio.

Then if the Radio reads and writes again, connect P1 & P2
back up again.

AGAIN, BE VERY CARFULL as these plugs can easily be broken if
not handled properly !

Note: Make SURE you use some Teflon or Mylar to Insulate the
Contacts from shorting out to the frame.
If you have one of these test jigs. great. if not, I can make you
one and it alows you to power up the radio without the
case.



3. While P1 and P2 are pulled back, look at the [ VCO ] Freq that
is Stamped onto the block, and MAKE SURE when you create a
new Code Plug that you have chosen the correct Freq range for
the radio being programmed.


4. If the above does not work, you would be well advised to seek
out a Motorola Tech in your area, OR I can fix them if you do not
mind the 2 ~ 3 week waiting period.

There are a few other proceedures to restore the radio, but it
does require a Test Jig & some advanced Software to fix them.

Monty

[Daniel Watson]

I used the method of grounding the first wire of left plug as desicribed in Batlabs suggestions. I was able to program the radio and it is back to the right band. The radio transmits but the beep at start up is very faint and the radio does not seem to receive. Is it possible the radio will have to be re-aligned and tunned? Thanks to Batlabls!!! There always a big help.

[60hzEE]

It should be able to receive something from another close radio or a generator putting out quite a few microvolts into it via an RF adaptor. The front ends do need some tuning if going a long way from where it was before. The same can be said for the transmitter.

The P200/HT600/MT1000 series are not broadbanded, as are the GP300/GP350 and later HTs and need a little tweaking occasionallly.

Lee

[larryepage]

Restoring the split in the code plug should not have caused this problem. If the radio worked correctly before you did all this, I'd check very carefully to make sure all connections are proper and secure, all plugs and sockets are aligned so that all pins are properly plugged in, and that nothing has been damaged.

I will tell you from experience that because these radios use older semiconductor technology, some of the circuits can be quite sensitive to damage from ESD. I would not expect the audio amp to be among them. But almost all Motorola radios use a bridge-style audio amp with floating outputs. Even a momentary grounding of a speaker connection can cause substantial damage.

Regards,

[60hzEE]

As Larry suggested, you might have a damaged U406. If you have a speaker mike, try powering up the radio with it attached. U406 has several different IC amps, and there are three that are used. One is common to both internal and external speakers. So, if just one of the internal amps is damaged, you might get full audio on the remote speaker.

All seem to have about 4VDC on their outputs, unsquelched.

If you had a working receiver before the bad code plug, you should still have one. Unless, by chance, you accidently put in a 440-470MHz codeplug instead of the 403-430. That would probably cause a problem, but usually you'll hear it via an error tone.

Lee

[Daniel Watson]

Thanks Raymond345
He fixed my code plug problem. 2 lesson to be learned here. Save a back up of the code plug and don't put a code plug in unless you are sure it is the right band. I took a guess and made a mess.
Thanks again Ray