Toa A-1812 - Manual (Page 14)

14
15. BLOCK DIAGRAM
+ +
+
8765432
1
MOH OUT 0 dB/600
Ω
EMERGENCY 0 dB/10 k
Ω
TEL PAGING –
20 dB/10 k
Ω
MIC 1 –
60 dB/600
Ω
MIC 2 –
60 dB/600
Ω
MIC 3 –
60 dB/600
Ω
AUX 1 (MOH IN) –
20 dB/10 k
Ω
AUX 2 –
20 dB/10 k
Ω
AUX 3 –
20 dB/10 k
Ω
MIC 1 SELECTOR
REMOTE OUT CONTROL
+ + + – – H C H C G H
Optional
C G
(70 V)
240 V 230 V
PA
Relay
2
Relay
1
Mute control
Chime
Emergency mode ON/OFF
ON
POWER switch
Power for control section
Mute
Mute
Power for audio section
Power for chime circuit
ZONE 2
ZONE 1
ZONE 1 (100 V) ZONE 2 (100 V)
Zone 2
Z
one 1
POWER
TEL
EMERGENCY
220 – 230 V AC or 240 V AC, 50/60 Hz
PT
Fuse
Fuse
Output level meter
JP
OT
DIRECT (100 V) 4 – 16
Ω
+
24 V
INPUT
C C
REC OUT 0 dB/600
Ω
LINE OUT 0 dB/600
Ω
0 dB
1 2
ON OFF
ON OFF
–20 dB –20 dB –20 dB –20 dB 0 dB 0 dB
0 dB
BASS/TREBLE
MASTER volume
Interlocked with Relay 1 (ZONE 1) (Relay 1) (Relay 2)
Interlocked with Relay 2 (ZONE 2)
Phantom power ON/OFF
Phantom power
Function switch (DIP swich)
Fuse
EB EB EB EB
Mute control
(MIC 1)
Mute control (TEL, EMER)
MIC 1 voice-activated mute ON/OFF
Chime tone selection
TEL voice-activated mute ON/OFF
–
TEL
EMERGENCY
A-1812 only