I have a zenith adr 620 audio cd recorder...trying to copy disk and keep getting an no audio prompt

Maybe it is a faulty disk. maybe there was a flaw in finalizing? What happens if your try it in another CD player?
CDRW have much smaller lands and pits than commercially produced CDs and players vary in their ability to tolerate burned CDs.

[PDF]CD RECORDER / PLAYER OWNER'S MANUAL MODEL : ADR-620 - Elektroda www.elektroda.pl/rtvforum/download.php?id=354123

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MODEL : ADR-620. Please read this manual carefully before operating your set. ... dealer or "LG Electronics U.K.Ltd." If the mains sockets in ..... POWER. PLAYBACK. SPEED. CD SYNC. ERASE. DUBBING. FINALIZE. ADR-620. 1. 10. 4. 5. 6. 7.

When you record from an external source, the data transfer may be too slow to produce quality recordings. If you're able to download the external source first, then burn it to disk, it should produce good quality recordings.

Do as it asks, insert blank CD-Audio or CD-Music media.

Discs for recording
For recording, make sure to use special audio discs only.
These discs are marked with “Digital Audio” and the logos shown below.
There are two different types of audio discs for the use on this CD recorder:
– CD-Audio Recordable (CDR) discs
These discs can be recorded on once and
play in all standard CD players and CD
recorders, when they are finalized.
– CD-Audio ReWritable (CDRW) discs
These discs can be recorded on, erased and
re-recorded many times and play in CDRW
compatible CD players and CD recorders,
when they are finalized.
– All Philips CD players and CD recorders
with the sticker shown here are CDRW
compatible.
To ensure proper working of the set we recommend the use of Philips audio CDR and audio CDRW discs only.
Note: Do not use a computer CDR or CDRW as recording will not work!

Go here and download the manual. You'll need it.

http://www.p4c.philips.com/files/c/cdr602_00s/cdr602_00s_dfu_eng.pdf

Mine keeps doing this. It isn't a disc compatibility problem. I find if I switch the machine off completely for about half an hour and then switch it back on the problem fixes itself.

tienes que comprar cd para grabacion que diga audio digital si no no los quema

First of all, CD-RW will not work in most regular CD players.

CD-R should work in other players but you will need to finalise them first. Refer to your manual on how to finalise a disc. Once finalised your discs should play in 99% of machines. Only very old machines (from the 80s) might have problems.

Hi!
usually dedicated AUDIO disks are recognized, provided they have been fully finalized at the end of the record session. This works also with "standard" disks except poor quality one's (the cheapest, in fact!)
If the problem persists, perhaps the LENS is dusty, or greasy , or worse :(
You can clean it with a cleaning CD or open the box and CAREFULLY clean it with any optical paper, eventually 70° alcohol.
You can also fix the green screw on the left of the lens but this is not recommended if y're not familiar with the guts of the machine. So avoid.
Papooh

Check your wire they could be damage

If the VCR tape has copy protection on it, I could see it doing this.