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RAM Audio LMS 266 / LMS 221 Digital Controller – Hardware Manual
6.- PROBLEMS SOLUTION
This section is dedicated to give possible solutions for problems in the working order, which are
easy to solve.
1 – The LMS 221 / LMS 266 is not active.
Check the main cable. If it is correctly connected and the blue power LED does not light, check
the fuse located in the mains input.
2 – The LMS 221 / LMS 266 turns on but there is no sound.
Check that the signal is being send to the processor correct input, 1 or 2. If there is sufficient
signal, the green signal LED will be lighting; if not, check the cabling from the mixing desk to the
processor.
3 – The obtained sound is strange.
Check the correct connection between the outputs and their corresponding power amplifiers.
Some ways could be changed. Always increase the amplifiers' volume bit by bit and way by way
to ensure a correct wiring and avoid that the transducers is being damaged.
4 – One power amplifier (with the same signal as the rest) sounds less.
Check if the cable, which connects the processor and the amplifier, is balanced. If not, the
output signal will decrease 6dB.
5 – The audio sounds distorted and not good.
Check that the input is not saturated (exceeding 15 dbu or 4.4 volts of input) In this case the red
clip LEDs will be lighting. You will only have to reduce the signal to processor's input until the
clip LEDs turn off. If the problem cannot be solved this way, check that the signal does not
come out distorted from the previous appliance, for example the mixer, which could have a high
gain in this way and saturate the sound mixer's input.
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