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MIxIng AMplIfIer
12 pA-60A/120A/240A
Block Diagram
Block Diagram
PWM
MODULATOR
CONTROL
AND
HANDSHAKE
DRIVER
HIGH
DRIVER
LOW
INPUT
STAGE
MUTE
CONTROL
AND
HANDSHAKE
DRIVER
HIGH
DRIVER
LOW
MODULATOR
PWM
CLASS D AMPLIFIER
MUTE
STAGE
INPUT
MASTER
VOLUME
INPUT 6 LEVEL
AMP
TEL IN LEVEL
INPUT S IGNA L DIS PLAY
INPUT 3INPUT 2INPUT 1
INPUT 6INPUT 5INPUT 4
SIG SIGSIG
SIG SIG
INPUT 5 LEVEL
INPUT 4 LEVEL
INPUT 3 LEVEL
INPUT 2 LEVEL
INPUT 1 LEVEL
SIGNAL DETECTION
INPUT 1,
EXT I N
0dB u
TONE CONTROL
SIG
CHIME
(0) (100Hz, 10kHz)
(+10 ~ -10)
LPFHPF
MUTE
BUFF
SIREN
CHIME, SIREN
CHIME SWITCH
SIREN SWITCH
MUTE CONTROL
-3-6 0-9-12-16-20
PROT
LEVEL ME TER
LED DRI VER
(+50 ~ +10)
AMP
MIC/LIN E
Vph
PHANTOM POWER
AMP
PHANTOM POWER
Vph
AMP
Vph
PHANTOM POWER
+
-
TEMP SENS
PROTECTI ON CI RCUI T
0dB u
MIX OUT
CHIME
SIREN
-20 ~ 0 dB u
TEL IN
+
-
INPUT 1
-70 ~ -20d Bu
-
+
INPUT 2
-70 ~ -20d Bu
+
-
INPUT 3
-70 ~ -20d Bu
INPUT 5
INPUT 4
-20d Bu
-20d Bu
-10d Bu
INPUT 6
RM-05
-20d Bu
INPUT 6
(+50 ~ +10)
MIC/LIN E
(+50 ~ +10)
MIC/LIN E
SIGNAL DETECTION
TEL IN
MUTE
(0)
MIX
(0)
MIX
(+10)
GA
(+10)
GA
(0)
BUFF
(+10)
GA
(+10)
GA
(0)
BUFF
LIMMITER
(+10)
GA
(-10)
GA
SPEA KER TER MIAN L
SP1
COM
SP2
SP3
SP4
SP5
COM
8 / 4 OHM +
COM
8 / 4 OHM -
Vth
+5V
+S2
FUSE
CIRCUIT
RECTIFIER
P/T
PWR
POW ER SWI TCH
AC I N
B-
B+
-15V
+15V
PRESET IN
PRESE T 5
PRESE T 4
PRESE T 3
PRESE T 2
PRESE T 1SP 1
SP 2
SP 3
SP 4
SP 5
SP ALL
SPEA KER Z ONE I NDIC ATOR
SP REALY
KEY IN
SPEAKER ZONE CONTROL CIRCUIT
PWM
MODULATOR
CONTROL
AND
HANDSHAKE
DRIVER
HIGH
DRIVER
LOW
INPUT
STAGE
MUTE
CONTROL
AND
HANDSHAKE
DRIVER
HIGH
DRIVER
LOW
MODULATOR
PWM
CLASS D AMPLIFIER
MUTE
STAGE
INPUT
OPT
pA-240A
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