Engl Screamer 50 II Combo E330II, Руководство оператора

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The speaker is emitting humming noises:
• Is there a connection (for example, via a shielded circuit) between the amp and another device that
is grounded via a power plug of its own? Two or more circuits sharing a common electrical ground
line can cause audible hum. If low-frequency noise is emanating from your rig, be sure to consult a
specialist.
• The amp and mains grounds are not connected properly or are altogether disconnected. Have an
experienced specialist check this.
• Cords connected to the input or effect loops may not be shielded properly. Replace them to check if
this is indeed the case.
• The amp or speaker cords may be picking up interference from powerful magnetic fields (for example,
of nearby power transformers or electrical motors). Reposition the amp and connector cables.
• The amp or speaker cords may be picking up radio signals, for example, from activated mobile tele-
phones or powerful local transmitting stations nearby. Switch off mobile phones while troubleshoo-
ting noise problems.
One of the power tube fuses blows:
• The given power tube is probably defective. If that power tube‘s fuse is replaced and the new fuse also
blows, the tube needs to be swapped out.
• The amp has been overloaded, perhaps by excessive volume levels, excess mains voltage, or the
wrong output impedance (where the impedance setting does not match the connected speaker‘s
impedance). Check the speakers‘ overall impedance and, if necessary, adjust your setup accordingly.
Error messages that can not be solved by the troubleshooting should be reported to the customer support.
You can reach us via the website www.engl-amps.com or via the email address service@engl-amps.com.
Please provide as much relevant information as possible and how the situation can be reproduced.