cobra 18 ultra w/weather no rx or tx
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- Newbie
- Posts: 4
- Joined: Monday 12th Mar 2007, 5:44
- Location: new york usa
cobra 18 ultra w/weather no rx or tx
hello again. cobra 18 ultra...no rx/tx but weather band works fine... had a bad final i think... replaced final trans and resistor next to it along with the driver trans but ng ??? any ideas.... when i key the tx light does come on but no power output at all? thanks!
-
- Newbie
- Posts: 4
- Joined: Monday 12th Mar 2007, 5:44
- Location: new york usa
-
- Newbie
- Posts: 4
- Joined: Monday 12th Mar 2007, 5:44
- Location: new york usa
Re: obra 18 ultra w/weather no rx or tx
If the radio has a SM5123A PLL. Check D18, D19 and IC5 if one or more have failed then you will have on RX and TX.
Rick.
Rick.
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- Newbie
- Posts: 4
- Joined: Monday 12th Mar 2007, 5:44
- Location: new york usa
Re: obra 18 ultra w/weather no rx or tx
Do you have the schematic diagram for the radio?
Rick.
Rick.