Yamaha Troubleshooting Guide

User Manual: Yamaha Troubleshooting Guide

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Page Count: 3

Troubleshooting Guide
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.
3
Symptom
Sound only heard on one side
(left or right)
My class is larger than eight students.
The control unit appears to be frozen.
Lights do not turn on or off, unable to
change settings.
Solution
Ensure that the instrument is connected from the
headphone output to instrument input L/Stereo
jack on instrument box.
Check to see if LC4 Hub is set to “Split Mode.”
If so, turn off and see if symptom persists.
Change cables or headphones with ones that are
known to work to see if symptom persists. If not,
then you might have a failed part. Contact customer
support for information about replacement or repair.
Utilize “Split Mode” with compatible instruments*
and purchase additional CM500 headsets.
Purchase LC4EXP expansion package which is
all-in-one box to add eight more students to your
LC4BASE.
Turn hub unit power off on and then back on.
If power on/off does not remedy the situation,
power off and then on while pressing the reset
button; use an unbent paperclip inserted into the
tiny hole on the back of hub to press the button.
Customer Support
For additional LC4 Music Lab support or troubleshooting, please contact Yamaha Corporation
of America Customer Support at (800)854-1569 or visit http://4wrd.it/LC4Help.

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