I have a Emerson Model MS9825 CD Radio Caset Player and the input transformer has an open Primary Emerson's Part # is 01894655220 any one know what the output voltage should be with 120 V input

SOURCE: MS9700 secondary voltage

I am working on the same situation. DId you first check to see if it isn't the fuse that has blown? Radio Shack has a 4 pack of 2 amp fuses for $2.49 which I think will work. Their catalog number is 270-1064. These as 5x20mm in size (the 1-1/4 x 1/4 inch is way to large) and they are slow blow - designed for this type of household equipment to protect from short circuits and power surges. If you are lucky maybe it is just the fuse. Since I can find no other information about this unit - especially the transformer - I'd check eBay for a working one. If you can get it cheal and it works test the power output with a VoltOhmMeter (VOM) and once armed with the info you can let me know too what the output is . You can then get a new transformer - have 2 working units - can keep or sell one to recoupe your eBay purchase. Just a thought. Hope it is only the fuse.

SOURCE: Nothing on Radio stereo system works.

check to see if the cd player has a little hole next to it if it does that is a release use a paper clip to push into the hole that should get your cd out.

SOURCE: Power transformer appears bad.

don't bother with a transformer. use a 12vdc 2amp power supply, the unit has a 8v regulator. remove the bad transformer and connect the power supply. polarity doesn't matter because the unit has full bridge rectifier that will provide the proper polarity.