Epson EMP-8000 - XGA LCD Projector, Service Manual

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2-29
EMP-9000/8000
SEIKO EPSON Revision:A
2.11. Spea k er U n it
Two speaker units (8 -3W) are equipped inside the upper case unit, faced upward. The
audio input signal from a host computer or AV devices connected to this device can be output
in stereo through the units.
If an external speaker is connected (with the hEMP of an accessory audio cable) to the Audio
Out terminal on theIF unit, the built-in speakers are disabled.
Figure2-31 Speaker unit
Figure2-32 Speaker control circuit block
The audio input signals from computers or an audio device are first amplified by the control
circuit on the AU board, then are output to the speakers. Detecting the connection to an exter-
nal speaker (Audio Out), the Main board Assy unit only determines the use of the built-in
speaker or the external speaker.
Speaker L Speaker R
AU board Assembly
CN201
CN201
CN204
CN1002
12pin
SpeakerL
SpeakerR
Main board Assy unit