Sony TC-K511S Operating Instructions Manual page 8

Playing Back
To change to recording mode
during playback
Keeping the B button pressed, press the
@ button. The unit immediately switches
from playback to recording without stopping
the tape. This is useful when editing
previously recorded material.
For headphone listening
Connect the headphone plug to the
HEADPHONES jack.
Is it necessary to set the MONITOR
button for playback?
No. The TAPE mode is automatically
selected and TAPE is displayed.