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MIxIng AMplIfIer
11
pA-60A/120A/240A
Block Diagram
Block Diagram
INPUT
STAGE
MUTE
SPEAKER ZONE CONTROL CIRCUIT
PWM
MODULATOR
KEY IN
SP REALY
CONTROL
AND
HANDSHAKE
DRIVER
HIGH
DRIVER
LOW
INPUT
STAGE
MUTE
CONTROL
AND
HANDSHAKE
DRIVER
HIGH
DRIVER
LOW
MODULATOR
PWM
CLASS D AMPLIFIER
MASTER
VOLUME
SPEA KER Z ONE I NDI CA TOR
SP ALL
SP 5
SP 4
SP 3
SP 2
SP 1
INPUT 6 LEVEL
AMP
TEL IN LEVEL
INPUT S IGN AL DI SPLAY
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
PRESE T 1
PRESE T 2
PRESE T 3
PRESE T 4
PRESE T 5
PRESET IN
CHIME SWITCH
SIREN SWITCH
MUTE CONTROL
-3-6 0-9-12-16-20
PROT
LEVEL ME TER
LED DRI VE R
PA-120
PA-60
(+50 ~ +10)
AMP
MIC/LIN E
Vph
PHANTOM POWER
AMP
PHANTOM POWER
Vph
AMP
Vph
PHANTOM POWER
+
-
TEMP SENS
PROTECTI ON CI RC UIT
0dB u
MIX OUT
CHIME
SIREN
+15V
-15V
B+
B-
AC I N
POW ER SWI TCH
PWR
P/T
RECTIFIER
CIRCUIT
FUSE
+S2
+5V
Vth
-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 TE RMIA NL
SP1
COM
SP2
SP3
SP4
SP5
COM
8 / 4 OHM +
COM
8 / 4 OHM -
OPT
pA-60A/120A
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