Engl E610II, Руководство оператора, Страница: 21 / 24

TROUBLESHOOTING
Some features that may be controlled remotely using a ENGL Z9 or ENGL Z4 footcontroller fail to
respond when you change settings:
• Powerful static charges, strong radio signals, or mains voltage spikes can affect microcontroller-dri-
ven 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, there is a defect in the control system, probably on the logic
board holding the microcontroller or merely a faulty contact on one of the stereo footswitch jacks. In
this case, consult an authorized service centre or a professional specialist.
The amp fails to respond when you try to control switching functions remotely via the ENGL Z9
footcontroller
• Is the ENGL Z9 footcontroller connected to the S.A.C. port?
• Is the cord you are using stereo, intact, and wired properly?
The amp fails to respond when you try to control switching functions remotely using a footboard
such as the ENGL Z4 or a MIDI switcher such as the ENGL Z11.
• Are the footboards or switching loops connected to the corresponding footswitch jacks?
• Are the cords you are using stereo, intact, and wired properly?
• If you are using footswitches other than an ENGL Z-4 or Z-11, are the switches or relays inside the
boards or switching loop systems off / on Single Pole Single Throw (SPST) switches? In other words,
do these switches continuously connect to GND when you wish to activate the given function? If you‘re
unsure about the answers to these questions, consult an authorized service centre or a professional
specialist.
The amp is not providing an output signal / no sound is emanating from the speaker:
• Is at least one speaker connected to the speaker outputs 4 ohms, 8 ohms or 16 ohms?
• 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 knob set to a high value?
Deactivate the Noise Gate 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.
• 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 centre.
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.