Front Panel Controls
1. POWER Switch/POWER Indicator:
This switch is used to turn the LES 780iR
ON (switch up), or OFF (switch down).
When the POWER switch is in the ON
position, the red POWER light
will glow.
2. IR 1/IR 2: The IR indicators (IR 1/IR 2)
will glow red when the corresponding
microphone is turned on. This light
confirms the LES 780iR is receiving the
infrared signal.
3. AF 1/AF 2: The AF indicators (AF 1/AF 2)
flash green when audio (voice) from the
microphone is dectected.
4. A VOLUME: Controls the volume
level of the microphone/transmitter
that is switched to Channel A.
Rotating the knob clockwise
increases output level.
5. B VOLUME: Controls the volume
level of the microphone/transmitter that
is switched to Channel B. Rotating the
knob clockwise increases output level.
6. VOLUME (TV/VCR, CD/TAPE,
COMPUTER, AUX): These knobs
control the volume of various audio
sources that are connected to their
corresponding input jacks on the
back panel.
7. SPEAKERS (1-6/OFF): These ON/OFF
switches turn the corresponding
speaker (connected to the same
numbered jack on the back of the unit)
on or off. This is used for “zoning”
multiple speakers within the classroom.
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HM-70 Operating Instructions
Charging
Rechargeable batteries are pre-installed.
a. Turn off the HM-70 by sliding the
power switch all the way down.
b. Connect one end of the charging cable
to one of the MIC CHARGE jacks on
the back panel of the LES 780iR.
Connect the other end of the charging
cable to the charging jack on the side of
the HM-70. The power indicator LED
will glow green when the charging
cable is connected and charging
correctly.
c. The batteries fully charge in 8 to 12
hours. Once the batteries are charged,
remove the charger cable from the
HM-70.
NiMH batteries maintain their charge for
a full day of normal classroom use. Always
turn the HM-70 off when not in use.
Operation
The Channel A/B switch is located inside
the battery compartment. The switch is set to
Channel B at the factory.
a. Slide the power switch on the side of
the HM-70 all the way up. The power
indicator LED will glow red and stay on.
(There is a center MUTE position if you
wish to leave power on but temporarily
cease transmission of your voice.)
b. Do not adjust the audio gain adjuster
that is located in the battery compart-
ment. It has been preset by factory
technicians and is not intended as a
volume control.
Holding and Positioning
a. When holding the HM-70, grip the
barrel in the center, silver section
below the power switch. Do NOT
grip the HM-70 around the bottom,
covering the black infrared sensors
encircling the base. This interrupts
signal transmission from the microphone
to the receiver. Speak directly into the
top of the microphone at a normal level,
holding the head about 2 inches from
your mouth, no lower than chin height.
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