I need to know the exact type of blank CD's to use in a TDK DA 5900 4X DIGITAL AUDIO CD RECORDER. I haven't used my machine for a couple of years and I have forgotten what type of blank CD to use. Can you help me?

It means the disc is not for recording Digital Audio. It would say so right on it. You can't use data CD-R's for recording. The manual explains it.

I imagine your search engine works. "TDK DA-3826 manual" leads eventually to...
http://www.manualsonline.com/support/tdk/other/please-help-find-the-manual-for-this-tdk-digital-audio-cd-re-1858792

Asking the question a thousand times won't get a faster answer but a Google search will.

You'll have to register for free to get it here.

http://www.hifiengine.com/manuals/tdk/da-5900.shtml

I can't help you with the manual but the rear panel is fairly simple and versatile...

http://gear.ign.com/dor/objects/481812/tdk-da-3826/images/tdk_da3826_io_scheme_big.html

Like any other recording device it has IN's and OUTs, but in this case there are two distinct units in the case - a Player and a Recorder.

You have analog in's and outs that accept standard Line Level RCA patch cords.

Coaxial Digital connectors carry standard digital audio in or out; ditto the Optical connectors.

I imagine that, being a dual deck, it has internal digital routing for copying from the Player to the Recorder.

I also imagine it requires CD-R AUDIO blank media for making recordings; not computer CDR's.

As described in the manual, page 23, the disc must be a Music or Audio blank disc. Data disc won't record on this machine.

Find a link to it here...

Click on "Get This Manual"

http://audio.manualsonline.com/ex/thread/view/idThread/1858792

Hey, I would suggest trying a lens cleaner disk on the device.

Data cds will not work with this recorder.
You must use music or digital audio cd's when recording!

Select the analogue source input.

You need to use an audio CDr, data or computer CDr's will not work in this machine. I don't know this specific machine, but usually you select the input, then 'rec type' eg manual,1 track or 1 disc,then press record to get into record pause,start your source,then press play on the unit to start recording. To finalize, you press finalize then either the play or rec button to start the finalize process.

This message usually indicates that a non-audio disc is in the record tray. Please use only blank music CD-R or CD-RW media. Refer to page 12 of the owners manual for more information regarding acceptable media type for the DA-3826. Also, the laser lens in your CD might be dirty or failing. Try the following solutions: Clean the laser lens with a CD player lense cleaning disc. Lense cleaning discs are available at many electronics retail store. Sorry i can't help you more.