Spectras won't turn off.

Post by **war bird radio** » Mon Apr 23, 2012 11:40 am

I have six VHF dash mount Spectras with A4, A5 & A7 heads. When powered up with the factory power cable and ignition sense line from the DB15 acc plug tied to 12vdc, the ON/OFF swtich on all the radio don't have any effect. The radios all come on and stay on. The power supply has to be turned off or disconnected.

Interesting thing tho, If I power up the radios but have programming cable plugged into the 15 pin acc jack with ignition sense at 12vdc then the ON/OFF switch on all radios work fine. What's the difference?

Sorry I don't have the model # for the radios handy.

I did a search on this but didn't find anything useful.

John

Jim202 · Post by **Jim202** » Tue Apr 24, 2012 3:01 am

war bird radio wrote:I have six VHF dash mount Spectras with A4, A5 & A7 heads. When powered up with the factory power cable and ignition sense line from the DB15 acc plug tied to 12vdc, the ON/OFF swtich on all the radio don't have any effect. The radios all come on and stay on. The power supply has to be turned off or disconnected.

Interesting thing tho, If I power up the radios but have programming cable plugged into the 15 pin acc jack with ignition sense at 12vdc then the ON/OFF switch on all radios work fine. What's the difference?

Sorry I don't have the model # for the radios handy.

I did a search on this but didn't find anything useful.

John

I have always used the ignition sense on most of my radios. On the other hand there is some jumpers in the control head that can cause the radio to power up when ever it gets 12 volts and doesn't need the external ignition sense feed. You might want to go look in the service manual for the control head information. Then again I can't remember which site it is on, but you might try looking on the repeater builder site and follow the links they provide. The Mike B site has extensive info on the radios.

Jim

kd5ual · Post by **kd5ual** » Tue Apr 24, 2012 7:28 pm

war bird

this sounds like an accessory cable problem
open the connector and see if pin 4 switched B+ and pin 5 ignition sense are shorted together
they should not be and will cause the problem you describe if they are
since the radios work properly with the programming cable

73 kd5ual

Post by **war bird radio** » Thu Apr 26, 2012 6:47 am

Ok Wendell I'll try that.
BTW, this is a new old stock accessory cable.

Thanks,
John

Spectras won't turn off.

Spectras won't turn off.

Re: Spectras won't turn off.

Re: Spectras won't turn off.

Re: Spectras won't turn off.