Ashly Parametric Equalizers SC-63 - Manual (Page 20)

TROUBLE SHOOTING TIPS
NO OUTPUT
Check AC power - is the pilot light on? Check in/out connections, are
they reversed? Are you sure you have an input signal?
EQ CONTROLS DO NOT DO ANYTHING
Is the master eq in/out switch in? Maybe the bandwidth setting is too
sharp to produce an audible change. Do not expect the center frequency
and bandwidth controls to have an effect if the amplitude control is set
at "0", or if the in/out switches are switched out,
PEAK LIGHT FLASHES OR STAYS ON ALL THE TIME
If the peak light flashes, the signal level to the equalizer is too high.
Turn down the gain. If it is on all the time, disconnect the input and
output cables. If it is still on, the unit must be returned for service.
DISTORTED SOUND
This will only be caused by too much signal (which will show on the
"peak" light. If the light is not flashing, there is an overload
somewhere else in the chain. Adjust the relative gain of each component
in your chain to keep everything at a comfortable level.
EXCESSIVE HUM OR NOISE
Hum will usually be caused by a "ground loop" between components. Try
using the suggested balanced input and output hook-ups if the other
pieces of equipment used in conjunction with your equalizer have balanced
inputs and outputs. Noise can be caused by insufficient drive signal.
Make sure you are sending a nominal 0 dBV line level signal to the
equalizer.
NOTE:
UN-SHIELDED CABLES, IMPROPERLY WIRED CONNECTIONS, AND CABLE WITH BROKEN
STRANDS (SHORTS ETC.) ARE THE MOST COMMON PROBLEMS.
WHEN IN DOUBT, GET IN TOUCH WITH YOUR ASHLY DEALER, OR CALL THE FACTORY
DIRECT - (800)828-6308. In New York State dial (716)544-5191.