Toa A-1803 - 15 Block Diagram

14
15. BLOCK DIAGRAM
+ +
+
87654321
MOH OUT 0 dB/600 Ω EMERGENCY 0 dB/10 kΩ TEL PAGING – 20 dB/10 kΩ 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 kΩ AUX 2 –20 dB/10 kΩ AUX 3 –20 dB/10 kΩ
MIC 1 SELECTOR
REMOTE OUT CONTROL
+ + +
– –
H C H C
G
H
Optional
C
G
(70 V)
240 V 230 V
(50 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 Zone 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