M1225 LS transmits ("pulses") upon power up

[insight3fl]

I just picked up a used M1225 LS and as soon as I turn it on, it keys up and off and keys up and off in a cycle of about 2 seconds. It continues until I turn it off and when powered up, it starts all over. No mic is plugged in and the rear connector is clean. I have seen through search that others have had similar random transmit problems. And of course, I can not read the radio because it is in transmit mode most of the time. The software can not get a connection and errors out.

Any ideas besides the mic and rear connector shorts to look for?

Thanks

[Bill_G]

If I recall correctly, the LTR mobiles *did not* start their hunt for a home channel by transmitting. That wouldn't make sense. But, if the default mode was conventional, and it originally had an emergency button on the accy port, it may be trying to report an alarm. Jumper 9 and 7 together to see if it calms down. Then again, it may be broken, or it may have been hacked.

[Victor Xray]

If it's on an LTR mode, they do transmit one or more bursts before channel grant. But I don't recall an emergency option, so I'm not sure that's the culprit. Could be a modified or shorted mic jack, which would explain being unable to read it. Can you change modes after power on to see if it has a conventional channel programmed?

[insight3fl]

Thanks... I found that pin 16 and 14 on the rear connector were shorted out. That fixed the transmit problem. I think I have the wrong cable though (Polaris CDM, Pm400, SM50) . Will not read radio. May have to make cable.

Thanks again for the help

[insight3fl]

another roadblock... what is the latest version of the m1225 software? I have 4.0 and when it reads... it says not compatible...

[insight3fl]

Hmmm... the LS uses a different RSS... The one I have is for the regular m1225. Moto stopped selling it also. They told me that unless I downloaded it before (I guess an older version than the last they sold) then I could not get a copy from their download area.... seems a bit unfair.... I had not need for it in the past so I would not have bought it before.. now I need it to program one of their devices...

[Satelite]

Hello:
Not sure if this was the last newest version but my records show for the Motorola M1225 LS model used
product number RVN4139C version number R03.00.00 Dated 1-7-1998
Not sure it was the newest version though.
Satelite

[insight3fl]

This is what I get from MOTO... looks like HLVN9001 (version)

Currency: US
Your search for item numbers beginning with HVN9001 returned 3 record(s).

1.
Item Number. HVN9001D * The item HVN9001D has been replaced with HVN9001E. Selecting this item will add HVN9001E to your cart.
HVN9001E: Item has been cancelled

SOFTWARE R05.00.00 1225LS
Unit of Measure: 1 EA
2.
Item Number. HVN9001E * Item has been cancelled

SOFTWARE R03.00.00 1225LS
Unit of Measure: 1 EA
3.
Item Number. HVN9001DR * Item has been cancelled

UPGRADE R05.00.00 1225LS
Unit of Measure: 1 EA

[insight3fl]

Thanks again for everyone's help here. I went from no go to full out of band programming! I hope I can contribute as much here as others, but my technical and practical experience is a bit limited compared to most of you.

All the best,

Dennis