Troubleshooting - Yamaha MLC-200 Installation Manual

11. Troubleshooting

Symptom
MLA-200 does not turn on
No sound is
output./ Minimal sound
is output
HPH250M, Microphone is
not properly picking up
your voice
The sound from the
microphone is not
transmitted to the
other party
Cannot communicate
with ML Touch
Had to replace 1 or more
MLA-200 Boxes and now
nothing is recognized in
the ML Touch App
24 – MLC-200 Installation Guide
Cause
The Ethernet cable is disconnected
PoE power is not supplied by the
network switch
The PoE power supplied by the
network switch is insufficient
The [MASTER VOL.] knob or [MY VOL.]
knob is incorrectly adjusted
Headphones are incorrectly connected
The [INPUT GAIN] switch is incorrectly
set
HPH250M Microphone is not properly
connected
A microphone headset that is not
compatible with the CTIA standard
is being used
The microphone headset is
connected to the [DUO] jack
The wireless access point and
iPad are not connected
The DIP switch settings on
the MLA-200 are incorrect
The ID of the MRX7-D is
incorrectly specified
Remedy
Disconnect, and then reconnect
Make sure that a PoE powered Ethernet
switch is used
Check the power supply specifications of
the Ethernet switch
Make sure that both knobs are turned to the
12 o'clock position
Disconnect, and then reconnect
Change to a microphone headset
compatible with the CTIA standard
Make sure that it is set to "+10 dB"
Make sure markings on Mic Jack line
up with the Markings on the Headphone
input Jack. Make sure the microphone is
completely inserted.
Change to a microphone headset compati-
ble with the CTIA standard
A conversion cable that converts from the
OMTP standard to the CTIA standard is
being used
Connect the microphone headset to
the [MAIN] jack. A microphone headset
connected to the [DUO] jack operates
only when a microphone headset is also
connected to the [MAIN] jack (DUO mode)
Check the Wi-Fi settings for the iPad, and
then correctly select the specified wireless
access point
Check that the ID specified with
the DIP switch is the intended ID
Check that it is the intended ID
Run ML Config Tool from Windows PC