Cobra 2000 GTL clock keeps resetting

[Jimbo165]

I have a cobra 2000 gtl base station radio. I can set clock and it keeps good time but when I turn on radio and then turn it off when done talking clock resets it self back to 12 oclock it will do this every time I turn it off any ideas on what the problem could be? Thank You Jimbo165

 

[dave457]

Sounds like the clock is powerd by your on/off switch, it needs constant voltage

Sent from my SGH-T599N using Tapatalk

 

[RBR762]

I also have a 2000 with that problem.
Never could figure it out!
Robert

 

[RadioGuy772]

Replace the 5.6 volt zener diode and also the associated switching transistor, it is for going between the clock and freq counter. Then replace the electrolytic caps that filter the DC supply and the small one that powers the oscillator / timer.When it goes bad, or shorts, due to bad electrolytics it shunts power (VCC) to gnd and therefore the clock resets. Sorry don't have a schematic in front of me at the moment to spell out the component designators for you at the moment, but you can find it in the service manual, or on cbtricks.com .

Do that, and the problem will be no more. But if you're having problems like that, 10 to 1, the radio isn't operating at optimum either. Sure it's probably functional, maybe an alignment could even get it back to being close to spec, but the caps are getting old. I would replace probably a dozen or so on the main radio PCB as well, and then realign.

Guys - these rigs are getting old.

 

[The Bruce]

I have a cobra 2000 gtl base station radio. I can set clock and it keeps good time but when I turn on radio and then turn it off when done talking clock resets it self back to 12 oclock it will do this every time I turn it off any ideas on what the problem could be? Thank You Jimbo165

Sounds to me like your CB has been hanging around with the wrong crowd: namely, those hippy long-haired VCRs in your house (we all know about their tenancy to sleep in all day and blink "12:00").

Tell your CB to get off the couch, get a job, and stop hanging out on the street corner with those good-for-nothing VCRs.

 

[RadioGuy772]

HAHAHAHA!!! Or, maybe it's waiting for it's Obama bucks... opps, I mean EBT CASH card needs reloaded for more scratchers, cigs and beer at 7-11. Sorry, I thought it went hand in hand with the previous post.

 

[S.W.Robinson]

Replace the 5.6 volt zener diode and also the associated switching transistor, it is for going between the clock and freq counter. Then replace the electrolytic caps that filter the DC supply and the small one that powers the oscillator / timer.When it goes bad, or shorts, due to bad electrolytics it shunts power (VCC) to gnd and therefore the clock resets. Sorry don't have a schematic in front of me at the moment to spell out the component designators for you at the moment, but you can find it in the service manual, or on cbtricks.com .

Do that, and the problem will be no more. But if you're having problems like that, 10 to 1, the radio isn't operating at optimum either. Sure it's probably functional, maybe an alignment could even get it back to being close to spec, but the caps are getting old. I would replace probably a dozen or so on the main radio PCB as well, and then realign.

Guys - these rigs are getting old.

which cap? "small one that powers the oscillator"