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8 5 0 i R U s e r M a n u a l
LES 850iR Classroom Amplification System
OPERATING THE OPTIONAL HM-70 HANDHELD MIC
ON
OFF
MUTE
(Center Position)
7 | 850iR User Manual
850iR User Manual |16
8 5 0 i R U s e r M a n u a l
1. SPEAKER OUTPUTS (1-4): These
binding post connectors are used to
connect the 850iR to the loudspeakers.
Depending on the speaker package,
all the outputs may not be used.
2. SPEAKER ON/OFF: These individual
speaker switches can be used to turn
off the audio in a specific area of the
classroom where there may be a
learning group or quiet time.
3. DC POWER: Plug the 24 V power
supply into this jack.
4. CHARGERS: These jacks charge the
LightMic(s) and optional handheld
microphone with the supplied charg-
ing cable(s) and charging cradle.
5. ALD/AUX AUDIO OUT: These output
jacks send audio signal to external
equipment such as a recorder or an
assistive listening device like the
LES-370 Personal FM System.
6. ADJ: These controls adjust the output
level of the audio being sent out of
the receiver/amplifier via the
ALD/AUX AUDIO OUT jacks.
SPEAKER OUTPUTS
250 400
70
0
1K 1K4
2K
5
4K
6K
+1
0
0
-10
OFF
OFF
OFF
OFF
ON
ON
ON
ON
VOL.
ADJ.
ALD OUT
AUX OUT
VOL.
ADJ.
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800i
X
INPU
T
PAGING INPU
T
ADJ
DC POWER CHARGERS
24VDC
L LR R
SENSOR INPUTS
SENSOR
SHOR
T
1 2
3
4
1
4
5
6
2
3
PageFirst: Emergency Page Priority
REAR PANEL CONTROLS
3. Grip the barrel of the HM-70 in the
center section just below the power
switch. Avoid gripping the HM-70
around the bottom, covering the
infrared emitters circling the base.
This could interrupt signal trans-
mission from the microphone to
the receiver.
4. Speak directly into the microphone
at a normal level. Slowly increase
the B VOLUME until you can just
hear your voice.
5. Slide the switch to the OFF position
to turn off the HM-70. (Make sure the
power indicator light is off.)
The Channel A/B switch is located
inside the battery compartment.
The switch is set to Channel B at
the factory.
1. 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.
2. The center position of the power
switch is MUTE. When in this mode,
the HM-70 is transmitting a signal,
but no audio can be heard through
the system. This is useful if you
wish to temporarily turn audio off
during a private conversation.
This optional feature interfaces with an independent classroom paging
system. When the page is broadcast, the system is muted, ensuring important
and emergency school-wide messages are never missed.
How it works:
1. PageFirst
sensor clip is hung around the lead wires attached to the in-room
paging speaker.
2. The clip is hard-wired to the 850iR.
3. As a page is broadcast, the sensor clip detects the audio signal though
induct
ion and immediately mutes the 850iR.
4. When the page is over, the audio to the 850iR returns to normal.
(For full installation instructions
refer to the install sheet included with the
optional
PageFirst sensor.)