Toa IR-802T - Manual (Page 15)

15
12. TROUBlESHOOTING
Symptom Cause and Points to Check Remedy
The power indicator does not
light when the power switch is
turned on.
Power plug is unplugged from an
AC mains outlet.
Plug the power plug into an AC wall
outlet.
The power indicator flashes. The connection cable to IR-820SP
is possibly failed.
Confirm correctness of the connection
to IR-820SP and connection cable.
If faulty is found, connect correctly
or replace the cable with appropriate
one.
No signal received. Infrared wireless microphone’s
power switch is not set to ON.
Set the microphone’s power switch to
ON.
Infrared wireless microphone’s
battery has become discharged.
Replace the battery with a new one.
If a rechargeable battery is used,
recharge it.
The microphones’ channels are
incorrectly set as follows:
Teacher’s microphone: Channel B
Student’s microphone: Channel A
Set the microphones’ channels as
follows:
Teacher’s microphone: Channel A
Student’s microphone: Channel B
No sound outputs. IR-802T is not connected to IR-
820SP properly.
Confirm correctness of the connection
to IR-820SP and connection cable. If
faulty is found, connect correctly or
replace the cable with appropriate
one.
External equipment is not connected
to IR-802T properly.
Connect correctly.
Sound is too faint to hear. IR-802T’s volume control is set to
too low a level.
Set the IR-802T’s volume control to
an appropriate volume level.
The volume control of the external
equipment is set to too low a level.
Set the volume control of the external
equipment to an appropriate volume
level.
Noise or strange (i.e. muddy)
sound is heard.
IR-820SP is installed in close
proximity to a device generating
radio noise or infrared light.
Install IR-820SP properly, referring
to “Installation precautions” for the
infrared wireless speaker.
Teacher’s microphone and student’s
microphone are set at the same
channel.
Set the microphones’ channels as
follows:
Teacher’s microphone: Channel A
Student’s microphone: Channel B
Short transmission distance. IR-820SP is not properly installed. Install IR-820SP properly.
Microphone’s volume controls
are not adjustable.
The microphones’ channels are
incorrectly set as follows:
Teacher’s microphone: Channel B
Student’s microphone: Channel A
Set the microphones’ channels as
follows:
Teacher’s microphone: Channel A
Student’s microphone: Channel B
Acoustic feedback occurs. The microphone head is covered
with your hand(s).
Do not cover the microphone head
with your hand(s).
The MID level of the equalizer
controls is set relatively high.
Decrease the MID level of the
equalizer controls.