Engl SOVEREIGN 100, Руководство оператора

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Troubleshooting
Programmable features fail to respond when you change settings:
The amp fails to respond when you try to switch presets via MIDI foot board.
The amp is not providing an output signal / no sound is emanating from the
speaker.
The speaker is emitting humming noises:
-> Powerful static charges, strong radio signals or mains voltage spikes can affect
microcontroller-driven systems, setting them to an undefined status (commonly
called a hung chip). In this event, your only choice is to reset the system.
Simply switch the amp off and on again.
-> If a reset doesn't solve the problem that is, the chip is still hung there
is a defect in the control system (presumably on the logic board holding
the microcontroller). In this case, consult an authorized service center
or a professional specialist.
-> Is the MIDI foot board connected to the MIDI IN port (33)?
-> Is the MIDI cord you are using intact and wired properly?
(Refer to page 31 for pin assignments.)
-> Is the amp set to the MIDI channel over which the MIDI foot board is sending
program change commands? You can set the encoding button (35) to OMNI
reception to check if the preamp is actually receiving data.
-> Is another foot board (the ENGL Z-9 or a two-way footswitch) connected and
therefore blocking MIDI reception?
-> Is at least one speaker connected to the speaker outputs ,
or (51, 52, 53)?
-> Is the power amp activated (Standby switch to ON)?
-> Are all cords (guitar, effect, and speaker) connected properly and are they
functional?
-> Unplug connected effectors and see if the preamp works fine without these
peripheral devices.
-> Is the Noise Gate activated in one of the Lead channels and the Threshold (38)
knob set to a high value? Deactivate the Noise Gate (38) for a quick check.
-> Are the active Master knob and the Gain and Volume knobs set to a value
greater than 0? If any of these knobs is set to 0, no signal is routed
to the amp's outputs.
-> Did you send via MIDI foot board a MIDI controller 7 command with
a value less than or equal to 5? This activates Master Volume Mute,
thereby silencing the amp.
You can check this by deactivating the Master Volume Mute by resetting
the appropriate encoding button (35) accordingly.
-> You may be looking at a faulty tube or another defect. In this case,
be sure to take the preamp to an authorized, professional service center.
-> Is there a connection (for example, via a shielded circuit) between the
4 ohms 8 ohms
16 ohms
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