TOA Electronics Europe GmbH
V-1000 Series
INSTRUCTION MANUAL
ACTIVE MONITOR MODULE V-1812C
? GENERAL DESCRIPTION
Designed for use with TOA’s V-1000B Mixer Frame, the V-1812C can monitor up to 12 speaker lines (100V) or line level
(1V). A switch on each input selects either 100V / 1V operation, allowing mixed signal monitoring on a single module. A
rotary switch allows selection of the input line for monitoring by a 7-LED bar graph and internal speaker. A headphone
socket is provided which can disable the internal speaker when used (depending on internal jumper setting). A volume
control is provided to adjust the speaker / headphone level.
? APPERANCE
7-segment LED bar graph headphone socket
speaker voltage range selection jumpers (J1 ~ J12)
volume control fuse, T 0.5 A (slow type)
channel selector jumpers J51 for setting speaker signal control
dB
+3
0
-3
-9
-15
-20
+6
12
6
39
10
11
4
5
7
8
2
1
V-1812C
J51
4 3 2 1
Si51 0.5A tr.
J12
J11
J10
J9
J8
J7
J6
J5
J4
J3
J2
J1
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? BLOCK DIAGRAM
? APPLICATION
Select the channel to be monitored with the channel selector ( ). The selected channel’s level will be displayed with the
5-segment LED bar graph ( ). The signal can be monitored by the build-in speaker and the volume can be controlled with
the volume control ( ). When plugging in a headphone into the headphone socket ( ) the speaker will be
switched off.
An external speaker can be connected at the pins 14 (HOT) and R (COM, ground). If it shall be driven together with the
build-in speaker then its impedance must be 8 ohms or higher. The internal and external speaker can be switched on and
off by a control signal, which speaker will be switched on or off depends on the setting of jumpers J13. If the external
speaker is to be driven without the build-in speaker then disconnect the build-in speaker by unplugging the connector "XL"
on the PCB board. The impedance of the external speaker must be 4 ohms or higher if the internal speaker will not be used
together with the external speaker, otherwise it must be 8 ohms or higher.
AT
AT
AT
AT
AT
AT
AT
ATAT
AT
AT
AT
AT
Inputs 1 - 12
Headphone jack
.
external speaker
Control input
1 432
J51
100V
1V
Attenuator =AT
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? INSTALLATION
Remove the mixer frame rear panel. Cut bus wires
to replace the original circuit board connector with
the supplied 44-pin card-edge connector, as
illustrated in the figure. Make internal connections
and replace the rear panel. After plugging the
module in the frame, secure the module with 4
screws.
? CONNECTOR PIN ASSIGNMENT
Z
22
A
1
B C D E F H J K L M N P R S T U V W X Y
122 103 4 5 6 7 8 9 11 13 14 15 16 17 18 19 20 21
0 V
channel 9 H
channel 12 H
channel 11 H
channel 10 H
channel 2 H
channel 3 H
channel 5 H
channel 4 H
channel 8 H
channel 6 H
channel 7 H
channel 1 H
ext. speaker C
channel 1 C
channel 3 C
channel 2 C
channel 4 C
channel 5 C
channel 6 C
channel 7 C
channel 8 C
channel 9 C
channel 10 C
channel 11 C
channel 12 C
ext. speaker H
speaker control
+24VDC
.
.
? SETTINGS
Setting of Sensivity
The input sensivity can be selected either 1 VAC or 100VAC by setting
the jumpers 1 ~ 12. Set the jumpers on right or left position, as illustrated
in the figure (view on part side of PCB, connector on right side).
44-pin card-edge connector
Bus wires
Original 10-pin connector
1 V
100 V
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Setting of Relay Function
The activation of the internal and the external speakers can be controlled by the control input depending on the settings of
the jumpers J51-1/2/3/4 ( ). For setting refer to following list:
Jumper Setting Control
J51-1 speaker(s) OFF
J51-2 speaker(s) ON
J51-3 switch over to external speaker
J51-4 switch OFF internal and external speaker
Set jumpers either to 1 or2, and to either 3 or 4.
The external control is made via pin 20 by making a contact to ground.
? SPECIFICATIONS
Inputs 12 channels, 1V AC or 100V AC selectable
control input ground input to switch ON/OFF internal/external speaker
speaker output 3W / 8 ohms (minimum impedance 4 ohms if internal speaker will be
switched off when external speaker is in use)
Headphone 6.3 mm phone plug
max. power: 8 ohms: 125 mW, 32 ohms: 200 mW, 100 ohms: 150 mW,
200 ohms: 100 mW, 600 ohms: 40 mW
Switch 12-step rotary switch for channel selection
Volume control speaker volume
Indicators 7-LED bar graph for level: -20 ~ +6 dB
Speaker 8 ohms / 3W internal
Power requirements 24V DC
Power consumption without speaker signal: 60 mA, max. 350 mA
Fuse 0.5A T (slow characteristics)
Connection 44-pin card-edge connector
Dimensions 80 (W) x 129 (H) x 194 (D) mm
Weight 470 g
Finish black
* Specifications are subject to change without notice
? ACCESSORIES
44-pin card-edge connector
if relay is activated
if headphone is connected
/
