Yamaha MLC-200 MLC-200 Installation Guide - Page 24

11. Troubleshooting Symptom Cause Remedy The Ethernet cable is disconnected Disconnect, and then reconnect MLA-200 does not turn on PoE power is not supplied by the network switch Make sure that a PoE powered Ethernet switch is used The PoE power supplied by the network switch is insufficient Check the power supply specifications of the Ethernet switch The [MASTER VOL.] knob or [MY VOL.] Make sure that both knobs are turned to the knob is incorrectly adjusted 12 o'clock position 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 Disconnect, and then reconnect Headphones are incorrectly connected Change to a microphone headset compatible with the CTIA standard The [INPUT GAIN] switch is incorrectly set Make sure that it is set to "+10 dB" 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 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 compatible 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 The DIP switch settings on the MLA-200 are incorrect Check that the ID specified with the DIP switch is the intended ID The ID of the MRX7-D is incorrectly specified Check that it is the intended ID Had to replace 1 or more MLA-200 Boxes and now nothing is recognized in the ML Touch App Run ML Config Tool from Windows PC 24 - MLC-200 Installation Guide