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.

The VM amplifier's speaker line voltage is set for 100 V line output. For 50 V or 70 V line applications, change
internal connector wiring as shown below. 

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. Pull the cable connector (9-pin) connected to CN1102

connector on the circuit board with the zone volume control
(selector switch). 

Step 3. Change wires inserted into the cable connector for different

wires according to color-coding shown in the table below to
switch to the desired line voltage. 

Step 4. Connect the cable connector to the circuit board. 

Step 5. Using the 4 rear panel screws and 6 side panel screws

removed in Step 1, replace the amplifier cover. 

Pull out the cable pressing the lock spring with a pointed object like tweezers as shown below. 

VM amplifier's front panel

CN1102 connector

Pull out the cable. 

Press the lock spring.

1

9

Speaker line voltage

CN1102 Connector Pin Number 

1

2

3

4

5

6

7

8

9 

100 V

White 

Violet 

Blue 

Green 

Yellow  Orange 

Red 

Brown 

Black 

70 V 

Violet 

Blue 

Green 

Yellow  Orange 

Red 

Brown 

White 

Black 

50 V 

Blue 

Green 

Yellow  Orange 

Red 

Brown 

White 

Violet 

Black 

Speaker line voltage  VM-2120  VM-2240 

100 V 

83 Ω

42 Ω

70 V 

42 Ω

21 Ω

50 V 

21 Ω

10 Ω