TC37LZ85 Audio Circuit Block Diagram
TC37LZ85 Audio Circuit Block Diagram
74
IC3301 of the A board handles the audio selection of most inputs. Analog audio of the tuner and audio signals
from composite, component, and DVI inputs are connected to IC3301 for selection. The output of IC3301 enters IC2106 and
undergoes analog to digital conversion.
IC4510 converts the incoming HDMI audio into serial data and outputs to IC2106. Digital television reception of
the tuner is output in the form of a transport stream that contains MPEG2 video and AC3 audio. The transport stream enters
the DTV decoder section of IC8001 where the audio signal is extracted and converted to serial data. The DTV audio data is
output to the audio DSP (Digital Signal Processor) IC2106 for processing.
The DSP IC2106 provides three audio outputs. One output is either AC3 or PWM audio connected to the digital
audio output jack. A second output is analog audio provided to the headphone jack. The third output is adjusted for volume,
bass, treble, and balance and then output as PWM data to the audio amplifier IC2301. The amplified two channel PWM data
is output to the right and left channel speakers for sound reproduction.
To Next Page
Loading...
