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Cobra GTL 2000 Power up Issue

AJAY0618

New Member
May 9, 2023
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Hello All,

Recently I pulled and old Cobra 2000 GTL from storage and attempted to turn it on. Only the clock displays and after testing the transformer voltage, I read 15.7v which seemed goo. Then I read teh voltage across the 4700uf Cap at just over 19v. I am considering replacing all caps but want to know if there may be another reason I am not able to power up this unit.

Thanks,

Arthur
 

Found these though one is in spanish
 

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  • cobra_2000gtl.pdf
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So, nothing wrong with power supply.
Put radio in AM and what's a voltage on TP8 or TP7? Driver/final PS.
Also check if power switch is working. It switches ON the rest of the radio by connecting "ground" For a test you can bridge points marked red with a piece of wire.
 

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Will do and good question on the power switch. Hey I located this if anyone else requires it and in english. Also main schematic.
 

Attachments

  • cobra_2000gtl_sm(1).pdf
    20.3 MB · Views: 6
  • cobra_2000gtl_om_main_sch.jpg
    cobra_2000gtl_om_main_sch.jpg
    3.7 MB · Views: 6
So, nothing wrong with power supply.
Put radio in AM and what's a voltage on TP8 or TP7? Driver/final PS.
Also check if power switch is working. It switches ON the rest of the radio by connecting "ground" For a test you can bridge points marked red with a piece of wire.
If I have read this correctly at the points specified it is 12.44v. This seems to indicate that the switch is working. This is in AM mode.
 

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