This document contains instructions for installing the VM-2120 and VM-2240 system management amplifiers
This manual provides installation instructions for qualified service technicians working on TOA VM-2120 and VM-2240 System Management Amplifiers. It covers the installation of optional components such as the CT-200M choke coil, IT-450 input transformer, EV-200 voice announcement board, and SV-200M surveillance board. The document also details procedures for modifying input transformer boards and switching off phantom power supplies.
| Compatible Models | VM-2120, VM-2240 |
|---|---|
| Required Screw Size (Side) | M4 x 8 machine screw |
| Required Screw Size (Rear) | M4 x 8 machine screw |
| Choke Coil Model | CT-200M |
| Input Transformer Model | IT-450 |
It is necessary to suppress harmonic component radiation from the power line, and it is mandatory in countries where CE Marking conformity is obligated.
Cut the specific jumper wires on the Inputs 1 — 3 Input Transformer Board corresponding to the input you wish to disable.
It executes failure detection by monitoring speaker lines automatically at set time intervals via the surveillance activation signal.