EMP-9000/8000
2-24Revision:A SEIKO EPSON
Circuit Block
Figure2-25
Function of the audio controller
1. The audio controller perform the selection of the input source, volume, tone quality, sur-
round on/off, and surround control.
2. It sends the signal to the CPU on the main board ASSY unit when detects the jack connec-
tion to Audio Out interface.
3. It controls mute of an audio amplifier (When detect the Audio Out connection). (Amp mute is
valid only for internal speaker.)
4. The tone adjustment is performed by "BASS" "TREBLE". The adjustment step is a cen-
ter±6 step. (Initial value is :center±0)
5. The volume adjustment is performed by "AMP VOL" and "LINE OUT VOL". The adjustment
step is 32 steps. (Initial value is :step15)
6. Voice mute is performed when "MUTE" key was pushed.
CN100 (RGB INPUT)
CN101 (RGB OUTPUT)
CN201 (PC AUDIO 1 IN)
J200 (PC AUDIO 2 IN)
J201 (S AUDIO)
CN202 (AUDIO OUT)
CN203 (VIDEO AUDIO)
CN200 (S-VIDEO)
CN300
CN301
CN302
PC-IN
Monitor out
Audio 1
L-Audio2-R
L-Audio-R
Audio out
Video L-Audio-R
S-Video
Mouse/Com1
Mouse/Com2
Remote
Noise filter
Noise filter
Level convertion
0~+9V
AMP circuit
IC200
Audio
Serector
Connect to Main
board Assy unit CN2
Connet to Main board
Assy unit CN3
Connect to Main
board Assy unit CN4
Connect to Main
board Assy unit
CN1004
Connect to Main board
Assy unit CN502
Level convertion
0~+9V
CN102
CN102
CN103
CN205
CN303
30
15
12
8
5
L-OUT/
R-OUT
+12V
R,G,B,HS,VS
HS,VS
R,G,B
SCL5/SDA5/
AJ-DET/
CN1EN/DDC-
CLK/
+5V/-5V
AU-DETECT
To Next Page
Loading...
