There is an inherent problem with this unit that is not the reader.I noticed that the red light which comes on when the super base is activated will sometimes flash while the unit is first trying to read the CD.It seems to be in sync with the disc spinning motor of the CD player.I have repaired a couple of these by checking and resoldering poor quality solder joints on the CD sub board and a few on the main circuit board.But this has not repaired all of them.Sony need to look into this.
First make sure that the disk you are trying to play is an official bought disk, if you have done this and still get the reading NO DISK, this is because the Laser light as a fault, and the only remedy is a new CD player.
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Clean the optical pickup lens, by inserting a lens cleaning disc into the player. If it do not help you, repalce the optical pickup unit. Sony sets will have special type optical picku units. You might have to contact the authorised service center for Sony at your town, to get an original one.
If the player is not reading the disc, then it will indicate no disc. Depending on access, use a q-tip and rubbing alcohol a small dab and clean gently. If you can not reach the laser lens, buy a CD cleaning kit because this will remove dirt and hopefully get it up and running, failing that! replace the whole unit, not cost effective for repair.
how long have you been using this player? The problem should be from the lens (laser).
The lens is weak and that's why it cannot read/load Cd's. The weak lens is also what's making it say "no disc".
Get a lens cleaner and use it to clean the lens, but if the lens still does the same thing even after using the lens cleaner, then it means you would have to change the whole lens completely to a brand new one.
By so doing your player would play all Cd's with no problem at all.
The CFD-S01 is designed for use with CD-R and CD-RW discs. With that in mind a few things come to mind. Are the CD-R discs you are using music or data discs? There is a difference and some CD players do not get along with data discs and won't play them well if at all. Also the burn rate used can have an effect - too fast and it won't play well. If a disc doesn't play at all it might not be finalized. A disc must be finalized on the recorder it was burned on before it is playable on any other machine.
Try to use CD/DVD clening disk ($6 in Walmart). Or simply use cotton swab (Q-TIP) and 40 % ethyl alcohol (vodka) or 50-70% isopropyl alcohol (NO ACETONE), depending on your budget.
Also check if discs are inserted correctly and not damaged/durty etc. Also check your discs. Some CD-players dont accept burned CDs (copyed). I believe Sony is not the case, just a suggestion.
If cleaning wont help lens might be damaged.