Sound Signal Path - Mitsubishi WD-52627 Training Manual

Sound Signal Path

Figure 5-16 shows the Sound Signal Path in both LCD
and DLP chassis. The Sound Circuitry is the same on
both LCD and DLP chassis. IC3J01 on PWB-TER-
MINAL select the analog sound signal source.
The selected signal is directed to PWB-DM.
The signal is converted to a digital I2S format
and is applied the Digital Sound Selection por-
tion of the HD Processor.
The signal is then directed to an MP3 Switch.
If the signal source is digital, it is processed by
an MP3 Decoder and is also directed to an
input on the MP3 Switch.
An I2S Decoder converts the selected signal
to analog left and right audio. The signals are
directed through PWB-RISER and are pro-
cessed by a sound processing IC, then ampli-
fied and directed to the set's speakers.
Figure 5-16: Sound Signal Path
The only new circuitry is Speaker Short Detect circuit
shown in Figure 5-17.
Figure 5-17: Speaker Protect Circuitry
5-15