Toa WM-290, WM-291 Operating Instructions Manual

[Operating instructions]

WIRELESS
MICROPHONE

WM-290
WM-291

Please follow the instructions in this manual to obtain
the optimum results from this unit. We also recom­mend you keep this manual handy for future refer­ence.

GENERAL DESCRIPTION

The TOA WM-290 (WM-291) is a hand-held vocal
wireless microphone incorporating a Shure's SM58 in
its head, and a compressor/expander system noise
reduction circuit to minimize the influence of high­frequency noise generated from digital equipment
such as personal computers and word processors.

FEATURES

Ideal for vocal applications.
Maximum input level of 144 dBspl.
Continuous operation for 12 hours or more on one
alkaline battery (LR6/1.5V).
Two battery indicators (green and red).
Internal LD. signal generator for tone squelch.
Stopper to prevent the fall of a battery case.
Compressor/expander system noise reduction cir­cuit.

USER PRECAUTIONS

Take care not to drop the unit on to a hard floo r.
Do not flip nor blow into the microphone head.
Avoid placing the unit in areas of extremely high
humidity and temperature.
Never open the unit nor touch its internal compo­nents.
Clean the unit's exterior periodically with a soft dry
cloth. If it gets very dirty, wipe first with a soft damp
cloth lightly soaked in a neutral detergent, and then
dry with a so ft cloth.
Never use thinner, benzine, or other solvents, which
may damage plastic part of t he unit .
Remove the battery if the unit is to be stored for two
weeks or more.

TOA Corporation

BATTERY LOADING

Use LR6 type alkaline battery.

1. Hold the m icrophone body and rotate the micro-

phone grip anticlockwise. (Fig. 1) The microphone

grip is so designed that it can not be completely
removed from the body because the battery grip
past the lock point as damage may occur. (Fig. 2)

Microphone head

Body

Grip

Fig.

1

2. Observing correct polarity instructed inside the

battery compartment, insert a battery. (Fig. 2 )

Fig.

2

Name plate

(Color identification label)

HOW TO USE

1. Verify that the receiver frequency is identical with

the microphone (transmitter) frequency.

2. Set the microphone on/off switch to ON, and verify
that the green battery indicator lights.

3. Set the on/off switch to OFF after use and verify
that the green LED is extinguished.

SENSITIVITY SETTING

The maxi mum input sensitivity of this microphone can

be set in the range of from 128 dBspl to 144 dBspl.

(Factory-preset to 136 dBspl.) If the user's mouth is

put exteremely close to the microphone, and speaking
loud into the microphone, the amplifier is overloaded,

thus resulting in sound distortion. Conversely, if used

away from the microphone, the sufficient S/N ratio
may not be obtained due to low-level sound pickup.

In such cases, observing the receiver's level meter,

adjust the microphone gain control as follows:

1. Set the receiver's power switch to ON. Then set
the microphone's power switch to ON and confirm

that the receiver receives a radio signal.

2. Use a Philips type screwdriver to ad just the gain

control, as shown in Fig, 4. Rotate the control
clockwise to increase the sensitivity, and counter-

clockwise to decrease it.

3. Speaking loud into the microphone, a djust the gain
control that the level indicator lights yellow. There

is no fear of sound distortion if the indicator lights

red just occasionally.

3. Replace the microphone grip by sliding the grip
upward and hand tightening the grip in a clockwise
position.

BATTERY REPLACEMENT

1. The alkaline battery LR6 can be continuously used
for approximately 12 hours. (The manganese

battery R6 fo r approximately four hours.)

2. Battery indicator

When the battey voltage is sufficient, the green

LED lights. The green LED becomes dimmer as

the battery voltage drops, and the red LED lights.

In such a case, renew the alkaline battery LR6
inside an hour or two (renew the manganese
battery R6 inside a half hour.).

Red LED

Fig.

3

Green LED

Fig.

4

4. If the receiver to be used is t he WT-780 or WT-781,
of which level indicator only indicates a peak level,

similarly adjust the gain control so that the peak
indicator lights just occasionally when the voice

input is at its maximum.