Epson EMP-7300, Руководство по обслуживанию

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2-24
REV.A
2.12 SPEAKER UNIT
Two speaker units (8
Ω
-3W) are equipped inside the upper case, 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 help of an accessory audio cable) to the
“Audio Out” terminal on the rear face, the built-in speakers are disabled.
Speaker (Left) Speaker (Right)
Figure2- 35 Speaker unit
Figure2- 36 Speaker control circuit block
The audio input signals from computers or an audio device are first amplified by the
control circuit on the CD10AU board, then are output to the speakers. The speakers
are connected to CN 102 / 103 on the CD10AU board. Detecting the connection to an
external speaker (Audio Out), the CD10MA board only determines the use of the
built-in speaker or the external speaker.
CD10AJ board
CD10VJ board
CN
300
CD10AU board
CN100
CN103
CN101
CN102
Connect to the
CD10MA board
Audio1
Audio2
Audio Out
Audio L
Audio R
Speaker R Speaker L