You can't burn a CD-A with the ZV427MG9. The unit will not burn to a CD to play in a CD player.
You may be able to record the audio to a DVD with no video source. Connect your cassette player to the Line In audio ports (L/R) at either the back or front of the unit. Depending on your cassette player, you may need a 3.5 mm M to RCA F/F adapter to connect the RCA audio cable to the cassette player's headphone jack. Do not connect a cable to the video input of the composite input unless you have a video on a camera or something to play back. This means that the recorded video may say "No Signal" or will be black or static. (Note: this may not work with this signal issue.)
Set the unit to record to DVD on L1 or L2, as needed, by pressing Source on your remote. Advance the cassette to where you want to record. Press Rec on the DVD unit and then press Play on your cassette player. If you want to identify tracks, Stop the recording and play back and then press Rec and Play again. You are at risk of having issues with the volume during the recording. Clipping of overly-loud sounds and distortion is possible.
When done, finalize the disc, if desired, to play the disc on other DVD players.
If you want to make an audio CD, you would be better off using a computer and connecting the cassette player to the Line In jack of the computer. You do have to make some adjustments to avoid recording the default Microphone input. Use a program like Audacity or any other audio editing program. Record the signal and divide it into tracks, if needed. Now you can filter out any distortion as well. Then save as a WAV file. Use a different program to burn the WAV files to a CD-A. (This must be burned as a mastered disc; my attempts that worked on an older CD player failed if there were gaps between the tracks. Lots of programs will do this; Roxio Creator is one option.)
The manual for the ZV427MG9 is available here: http://download.p4c.philips.com/files/z/zv427mg9_f7/zv427mg9_f7_dfu_aen.pdf
I hope this helps.