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9
11. BLOCK DIAGRAM
INPUT 1
LINE: –10 dB/600 Ω
MIC: –70 to – 50 dB/600 Ω
INPUT 2, 3
LINE: –10 dB/600 Ω
MIC: –70 to – 50 dB/600 Ω
INPUT 4 – 6
LINE: –10 dB/600 Ω
MIC: –70 to – 50 dB/600 Ω
INPUT 7, 8
–10 dB/10 kΩ
MODULE
–10 dB/10 kΩ
MUTE CONTROL
POWER REMOTE
REMOTE VOLUME
+
–
120 V
VCA
TREBLE
BASS
Tone
control
Power
Amplifier
Power
remote
SA
POWER switch
Power for
control section
Power for
audio section
Thermal
sensor
Fan
A-724 only
70 V
SP OUT
25 V
POWER
120 V AC
60 Hz
PT
Fuse
Fuse
Output
level meter
OT
4 Ω
COM
REC OUT
0 dB/600 Ω
PRE AMP OUT, 0 dB/600 Ω
PWR AMP IN, 0 dB/10 kΩ
Phantom power
+
–
H
C
900 Series
module slot
IT
Transformer
(optional)
LINE MIC
MIC TRIM
INPUT
volume
MASTER
volume
INPUT
volume
INPUT
volume
INPUT
volume
INPUT
volume
MUTE SENSE
Analog mute
LINE MIC
MIC TRIM
LINE MIC
MIC TRIM
Mute
Mute
Mute
Mute
Mute
MUTE
RECEIVE