The Sony CFD-S05 unit will not power up

I had the same problem and found C953 had gone short circuit, replaced this and it now powers up OK.

If you are not experienced with the proper use of a soldering iron and removing and replacing electronic parts, I don’t recommend you attempt it, as soldering has to be done correctly or it will result in a weak joint.

I did have this identical problem and did replace a couple of capacitors but in the end the cause of the unit powering off after turning it on was the power cord itself !!

At some point someone had used a different AC cord for this unit and the molding of the power plug end (to go into the rear of the unit) was not matched to the shape of the player receptacle - thus making poor and intermittent contact.

Of course the instant the unit had a drop in power for a split second, it shut down.

I would recommend you try this one solution before doing anything internally.

If you cannot locate the correct AC cord, try Amazon or any number of shopping sites on the web. I often find these cables at thrift stores for a couple of dollars but you must match the plug shape with the units ac port on the back.

If you are sure you have the original AC cord, the connections may be worn out or the pins in the unit itself may have to be spread open a little .

No soldering required for this fix !!!!!

cndwilson sounds like you have an issue with the power circuitry on the mainboard. Disassemble it and check for any burned/leaking or domed looking caps. Post some images of your board with your question. Use this guidefor that. That way we can see what you see. Use these guides to work on your Sony

I think with this CD player any of the electrolytic caps are suspect. As I remember there are several power supply lines of different voltages in this unit. When troubleshooting I found it easiest to disconnect all the supply lines and then check them one by one to see which one is shorted. When you find the shorted supply line start removing capacitors on that line until the short goes away. Once the short disappears you found the shorted capacitor.

Alternatively you could just replace all the electrolytics. It’s likely just a matter of time until they all short out.

Hi @transform2020,

Asking questions when you don’t know is never dumb, not asking questions when you don’t know, is.

Here’s a link that may help.

Just select the value of the capacitor C329 = 470uF 16V, can’t see C953 value shown in answers above, but it should be marked on the capacitor itself.

Alternatively, there are electronics parts suppliers in Vancouver.

Just search for electronics parts Vancouver Canada to get results. Contact them and ask if they have the required components in stock.

Ebay also has them but you mostly have to order in minimum quantities (mostly >5) and there may be shipping delays as the less expensive ones are shipped out of China

I am fixing a unit with the identical problem. After some troubleshooting and replacing the two above stated capacitors, the unit continued to do the same. (Turn on very briefly)

I should have gone with my first instincts which was a fault in the capacitor at C950 !!

4700uF @ 16V

(I replaced it with a 25V)

Once this cap was replaced, the unit functioned as it should.

My problem with this unit was electrical but caused by someone dropped something heavy on the front upper circuit board and cracked the circuit board as well as the plastic form that holds the buttons. Maybe someone has a used unit from which i might obtain used parts. Please email at wjbraun1941@gmail.com. So not always electronic parts. Wally