TOA Electronics VM-2120 Manuel D’Utilisation

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Caution: Leave the following work to a qualified service technician. 

Be sure to switch off the power before the work. 

You can convert the audio input section in Input 1 – 3 terminals, Remote Microphone (RM) terminal, and
Telephone Paging (TEL) terminal on the unit from electronically-balanced input to transformer-balanced type.
Solder the optional IT-450 input transformer to the required input section. 

Step 1. Remove 4 screws on the amplifier rear panel and a total of 6 screws on the sides to remove the

cover. 

Step 2. Removing the input transformer board 

Remove the Inputs 1 – 3 input transformer board, which is installed on the rear upper circuit board in
the unit. 

Remove the RM/TEL input transformer board, which is installed on the rear lower circuit board in the
unit. 

Side: M4 x 8 machine screw ..... 3 pieces each

Rear: M3 x 6 machine screw and M3 plain washer ..... 4 pieces

Inputs 1 – 3 input transformer board

Rear upper 
circuit board

Rear lower circuit board

RM/TEL input transformer board

Input transformer