Question about Sony CFD-E75 Cassette/CD Boombox

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No power to unit

When I attempt to play cd or radio, it starts then fades away and the lcd display goes blank. If I hold the end of the ac power cord at an angle where it enters the unit, sometimes it will play. I know that the cord is good (I used one from another Sony unit), so I'm guessing it must be the ac inlet inside of the unit. Would this be correct and if so, where could I find a replacement. I've opened the unit and looked at the inlet plug, but did not observe anything. Thanks!

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Re: no power to unit

Remove the power plug and reopen the unit. Usually the socket will be soldered directly to a Printed Circuit Board. Look in the underside (where the solder joints are and you'll see the joints associated with the power socket. One of these is either a bad connection or the solder pad has lifted and broken the track on the PC board. If it's the solder pads give them a workout with a soldering iron if it still plays up scrape the protective lacquer of the PCboard Tracks and resolder them to the socket's solder joints. This should solve your problem. The best way to spot a bad connection is to reinsert your plug (making sure the other end isn't plugged into the wall socket) and lever the plug up, down, left and right. If there's anything faulty you'll see it. The solder joints will move very slightly and if the track is fractured you should spot that too. One other tip is that there is a switch built into the socket which will disable the battery power when you plug the unit into power. I have seen a few of these switches go bad but the chance of that is extremely small. I'd put my money on the socket's solder joints. BMW

Posted on Jul 14, 2006

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Re: no power to unit

Fuse blown in primary of xformer, you cannot replace it but get creative, measure across the 4 pins on xformer, fuse is across last 2.

Posted on Aug 10, 2010

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SOURCE: My Sony CFD SO1 keeps skipping/display light keeps flashing

That is an electronic problem. Probably a just-about-to-break cable in the motor of the CD drive, that sometimes causes a short and turns off the unit, or sometimes makes it to comport erratically and produce the buzzy sound. If you have electronics knowledge, then you may open and check the wiring harnesses. If don't, take it to your local electronics repair.

Posted on Nov 20, 2009

Testimonial: "Thanks! In terms of price though? Would it cost as much to get it repaired as the CD Player itself? Or is it a reasonable price?"

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SOURCE: I need a replacement electric cord for my old Sony

Tv repairs shops carry a selection of power supply cords, also check out Radio Shack Stores.

Posted on Feb 03, 2011

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SOURCE: I lost my AC Power

Try this , they sell power adapters for sony CD radio cassette

Posted on Jun 28, 2012

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Hello db1964,

I have a cdf-e75 that had a similar problem, although the red power light was dim for all functions. (the radio, tape and cd)
After opening up the unit and inspecting, I found one of the pins on the printed circuit board for the power had broken away from the solder. (it is a tiny board where the AC connector is soldered to) Seems in my unit there is nothing securing the molded AC connecter to the plastic case except the the printed circuit board it is soldered to-It is a poor design; perhaps your is the same? I suspect over time pushing the AC cord into the back of the player may have broke the connection? Anyway, I soldered the connection and I have never had any additional problems as the unit has worked fine since.
Don't know if this helps, but my suggestion would be to open the unit and inspect the pin connections on the AC printed circuit board to see if any have a loose/broken connection. ( Mine was not noticible with the naked eye as I had to use a magnifying lens and a bright light. Hope this might help.

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