W Audio EP-300 - Operation and Troubleshooting; Amplifier Operation Steps; Problem Chart

Operation
After having connected your amplier to the mains, turn both gain controls counter clockwise to the
“min” position. The last product to be switched on is amplier. The “ON” and “ PROTECT” LED
light up now. If it does not, check if the amplier is connected to the mains correctly.
After the turn on delay the speakers are activated (PROTECT-LED is off).
After having set the volume controls of the pre-amplier in nil position, turn the gain controls of your
amplier to mid-position. Now adjust the volume with the gain controls CH A and CH B
All important operating modes of the amplier are arranged on the front panel.
If you want to switch off the system, switch off the amplier rst in order to avoid acoustic shocks
on the speakers.
Problem Chart
PROBLEM
No Power
No Sound
Noise
Fan does not work,
LED’s do not light up
Protect LED lights up
permanently
CAUSE
The power cord is not connected
The power cord of the respective
product is not connected properly or
not at all.
The connection socket or the plug is
dirty
The input signal is too strong
The power cord is not connected
Input receive DC voltage
Amplier overheats due to obstruction
Impedance of speakers too low
Short circuit in speaker connection or
in speakers
Technical default or amplier
REMEDY
Check the power cord and any
extension cables
Check the power cord and if the
plugs are properly connected with the
sockets
Clean the socket and/or the plug
Reduce the input signal via the gain
control
Connect the power cord
Switch amplier off and have the
product checked by a service
technician.
Clean the fan grill
Connect other speakers
Check speakers and connections
Switch amplier off and have the
product checked by a service
technician.
6
-20 dB to 30dB Output level
Clip Short circuit or ompedance too low or signal distorted
Protect Active during stabilisation period after switching on or when one
of the protective circuits are activated