User Manual

2
Symptom
No sound is heard in student
headphones.
Split Mode - students aren’t isolated.
Radio Frequency (RF) interference
is heard.
Student headphone/mic is intermittent
(cuts in and out).
Solution
Ensure instrument cable is connected to both the
instrument and the student instrument box.
Ensure the student headphone/mic unit is
plugged into the student instrument box
correctly – microphone into mic input and
headphone into headphone output.
Ensure that the data cable (RJ-45) is connected to
both the student instrument box and the LC4 hub.
Student instrument box or headset failure. Try
another working unit – if that works then replace
the non-functional component.
Ensure that the “Split Mode” switch on the rear
of the LC4 hub is turned to the “on” position.
Ensure that the instrument is configured properly for
Split Mode (see p.4 of the LC4 Installation Guide).
Ensure that you are only using cables supplied with
your LC4BASE or LC4EXP packages. Using 3rd
party cables, such as standard Ethernet cables, can
cause RF interference.
Contact customer support for information on
replacement cabling.
Contact customer support. To prevent damage to
headset and student instrument box, install on top
of instrument where possible to avoid tripping or
snagging. Your headset cable or student instrument
box jacks might be damaged.