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It's plugged in but will not power on - Crosley Mission (CR72) Shelf System

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That thing has tubes and tubes are hard to find,first thing is to blow it out cause those tubes need air and dirt is the constant enemy,Built up dirt will kill them ,its a tube that isn't working and with out a tube tester it will be difficult. I would take to someone that is a old radio enthusist working on those things is a lost art and the tubes aren't made anymore so this one will be a challenge .The radio guy will help you out in those areas cause I bet he has a source, You might have to invest some time and money to get it to work,but the payback will be worth it

Posted on Mar 31, 2011

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  • Richard Jun 23, 2011

    Hi,
    That's not an old radio but a repro and a nice unit.
    It has no tubes and is all modern electronics.
    Can you give me some more details and what you've
    tried and I will try to help you get it up and running.
    Thanks,
    Rich

  • Brian Manuel Jun 23, 2011

    Well hopefully you know how to use a meter to test where the electric is and where it isn't. You will need to take the back off and see if there are any fuses blown usually a glass tube with a wire in them and if you dont see one in them then it's blown. check that first and if you can jumper a new wire on where the other one comes out to see if iut is the cord, If still no luck see if there are tp labels on the board TP standing for test points put your red lead on there and the black lead on whare it says Gnd or ground (usually around the screw head of the board mount. and see what you have. I syuspect a fuse ,a MOV if it has one or a diode but hard to tell with out looking at it. Put your nose to work as well and see if you can smell anything like burnt electric,if you know what I mean. Let me know I'm curious.

  • John McPherson Jan 27, 2012

    Most of the repro-radios have 2 weak spots,
    1 is the power switch. Bypass that and install either toggle up under with the phonograph or a roller switch on the power cord. In both cases they should interupt the AC power to the transformer. The transformer is otherwise always energized on the primary.
    2 is the bridge rectifier combination and zener diode. Remove the zener and replace the rectifiers with 1N4007's.

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