OmniSistem Beta 3 – EC2402 - Manual (Page 12)

Check And Solution
10
Problem
Cannot POWER ON
Parts of key on panel
cannot operation
No signal output or is
very small
Overload light is often on
Sound faulty,
some frequency is lost
Over white noise
Contrast of screen
is in deviation
Key lock function enable or not?
Lower the input signal, the biggest input is +20dbu
If you want to input full way signal, please check
whethercrossover is open and lead to cut off or
lower down somefrequency ?
Please check whether the input gain is too small, but
output gain is too much?
As the temperature features of lcd, when the
temperatureis too high or too low, the contrast of
screen will decease or increase, please adjust the
contrast under utility.
Please check the connection of the system,
especially pay attention to the connection
to the ground .
8. TROUBLESHOOTING
Whether input, output are in the condition of mute?
Whether input, output gain decay overabundance?
Whether input, output signal route is correct?
If setting crossover ,whether HPF corner frequency is
lower than the LPF cornet frequency?
Whether power cable connect to power supply net,
or the switch not press down
System hum noise