2-15
EMP-S4
SEIKO EPSON Revision:B
2.7 Speaker
The projector has a single 1 W built-in speaker that is at the rear of the projector.
It can be used for monaural output of the sound that is input to the projector from a host
computer or video source.
The signal from the computer or video source is amplified by the audio control circuits on the
AV board and then output to the built-in speaker through connector CN1800.
Figure 2-17. Speaker
The following diagram illustrates the circuits that control the speaker.
Figure 2-18. Speaker Control Circuit Block Diagram
Speaker
IC1800
Audio Amp
IC104
udio input port
CN101 CN1800 Speake
Volum up/down
Mute
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