Pioneer DVR-210-S Manual page 19

Signal Flow
(Record Tuner/Line)
In the TUJM assy the Control CPU will direct the Input selector to send the
selected A/V input signal or Tuner Station signal to the main A/V
processing IC. When selecting the tuner to record you must also select (L,R)
or (mono+SAP) as your audio record source.
IC1001 will MPEG encode the selected signals and pass them on to the
Drive assy for disc recording.
IC1001 also outputs the A/V signals for monitoring as (Y/C, Y/CB/CR, S or
composite) back to the TUMJ assy. Audio will be Analog R/L or Digital out.
18.