Toa VM-2120 - CHOKE COIL INSTALLATION; INPUT TRANSFORMER INSTALLATION AND BOARD MODIFICATION; MOUNTING OPTIONAL EV-200 M VOICE ANNOUNCEMENT BOARD; MOUNTING OPTIONAL SV-200 MA SURVEILLANCE BOARD

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13. CHOKE COIL INSTALLATION
The work must be done by a qualified service technician only.
For the installation method, refer to the separate instruction manual for qualified service technicians.
14. INPUT TRANSFORMER INSTALLATION AND ITS BOARD MODIFICATION
The following work must be done by a qualified service technician only.
1. Input transformer installation
2. Modification to switch off the phantom power supply
3. Modification when the sub- and master VM amplifiers are connected
For the installation and modification methods, refer to the separate instruction manual for qualified service
technicians.
15. MOUNTING AN OPTIONAL EV-200M VOICE ANNOUNCEMENT BOARD
The work must be done by a qualified service technician only.
For the mounting method, refer to the separate instruction manual for qualified service technicians.
16. MOUNTING AN OPTIONAL SV-200MA SURVEILLANCE BOARD
The work must be done by a qualified service technician only.
For the mounting method, refer to the separate instruction manual for qualified service technicians.
Step 3. Turn off (break) the Chime switch when the broadcast is completed. A post-announcement chime
tone will be sent out to the zone(s). (Only when the up & down 4-tone chime has been selected.)
Step 4. Press the selected zone selector key (Zone 1 – 5) again to terminate the broadcast.
VM amplifier
Chime activation
GND
Chime activation switch
Pin No. 9
Make
Break
Post-announcement
chime tone