Mitsubishi V19-V21, Tehnical Manual

Page: 61 / 71

9-1
Chapter 9
Sound Circuitry
Like most of the analog circuitry in the V19/V21, the
Sound Circuitry is almost identical to previous models.
This is apparent from the above Simplified Block Dia-
gram.
The Sound Source Select circuitry selects the sound
source for both the main and sub pictures. Most of
the sources are conventional and have been avail-
able in the past:
• Main Tuner
• Sub Tuner (monaural only)
• Five External NTSC Inputs
• Two Component Inputs (DVD)
One additional sound source is added in the V19/V21
chassis, DM-R and DM-L. This is the sound signal
from the DM Module. It is initially received in a
digital format, from the ATSC/QAM Tuner or the
IEEE 1394 inputs. The DM-R and DM-L signal are
analog stereo signals that are directed to the Sound
Source Select circuitry.
The remainder of the circuitry is the same as in many
previous models:
• MCS Decoder circuitry decodes the Main
Tuner sound signal, generating mono, stereo,
or SAP signals when broadcast.
• Main picture sound from the Select circuitry
takes two paths:
1) To Audio Control circuitry
2) To the Monitor Outputs
• The Audio Control circuitry performs adjust-
ments to the Volume, Treble, Bass, etc. The
outputs from Audio Control circuit are
directed to the Audio Amplifier, and then to
the set’s speakers.
• Sub picture (PIP) sound, from the Source
Select circuit is directed to the PIP Sound
Output Jacks.