LightSpeed Technologies 850iR user manual Troubleshooting Guide, 8 5 0 i R, U s e r, M a n u a l

8 5 0 i R U s e r M a n u a l

TROUBLESHOOTING GUIDE
Note: Most problems are directly related to low battery power. Please run
through the “Battery Check” items first. For remaining troubleshooting,
use known good, fully-charged batteries.
Battery Check		No Sound From Speaker
•	Confirm batteries are charged	•	Turn the 850iR on. Confirm that
	each night.		the POWER light located on the
•	Make sure the LT-71 is turned off		front panel switch is on.
	while charging so that it will attain	•	Confirm signal is being received
	a full charge. Full charge will last		at the amplifier. The IR signal
	eight hours.		light will be lit (red) indicating a
•	Make sure the charge cord is		signal is being received.
	connected to the cradle charger.	•	Confirm microphone is function-
•	Inspect the battery contacts. Clean		ing. Next to the IR signal light is
			the AF signal light. This light will
	and adjust if necessary.
			flicker (green) as audio is picked
Hearing Static
			up by the microphone indicating
•	Ensure sensor is in optimum		activity.
	location (refer to sensor placement	•	Ensure speaker switch on the
	in manual). A single sensor will		amplifier is in the “ON” position
	cover a 1600 sq. ft. enclosed		for each speaker that is connect-
	classroom.		ed to the amplifier. Check con-
•	Ensure that no other LT71/HM70 is		nections on both the amplifier
			and speaker.
	operating on the same channel.
•	If an external microphone is in use,	•	Confirm that the speaker wires
			are connected correctly to the
	try another LightMic that is known
			back of the 850iR (refer to
	to be working (if available) to isolate
			speaker install guide) and make
	the problem. If static persists with
			sure that the speaker switch for
	“known good” microphone, the
			that output jack is in the ON
	LT-71 input jack has damage and
			position.
	will need service.
Low Volume or Feedback

•Ensure microphone is positioned appropriately, just below the collar bone. If a headset microphone is in use, the end of the mic boom should be positioned at the corner of the mouth.

•Check volume level on the ampli- fier. If the volume is too high, feed- back WILL occur—adjust accordingly.

If you review these instructions and still have questions, write down the serial number and model number of your system and call LightSPEED Technical Services at 800.732.8999, 6:30 a.m. – 5 p.m. PST.

19 850iR User Manual