Service And Preventive Maintenance; Troubleshooting - Hughes & Kettner Edition Blue R-15 Manual De Instrucciones

EDITION BLUE MANUAL
5.0 SERVICE AND PREVENTIVE
MAINTENANCE
The EDITION BLUE™ does not require service of any
type. However, there are a few precautions you
should heed to ensure your amp lasts for many
years.
• Ensure all peripheral devices, cords and cables
are in a state of good repair. Defective speaker
cables are the most common cause of power
amp failure. Poor-quality cables will cause hum
and undesirable noise.
• Make certain your amp's ventilation ducts are
not blocked or covered. Proper cooling will
prolong the life of your amp.
• Avoid mechanical shocks and exposure to
extreme heat, dust and especially moisture.
• When connecting peripheral devices, always
pay close attention to their specifications. Never
connect devices with high output signal levels
(e.g. power amps) to your amp's input.
• Ensure you have the correct AC power rating
available before you plug in the amp. If in
doubt, ask the venue's sound technician or the
custodian of the building you are rehearsing in.
• Refrain from do-it-yourself repairs! Have a quali-
fied service technician replace internal fuses.
With the unit off and unplugged, use a soft damp
cloth to clean the exterior surface of the
EDITION BLUE™.

6.0 TROUBLESHOOTING

1) The EDITION BLUE™ will not switch on:
• The amp is not getting any AC power. Check
the mains cable to see if it is connected
properly.
• The mains fuse is defective. Replace the fuse
with another identical fuse. If this fuse also trips,
consult your Hughes & Kettner
2) The EDITION BLUE™ is connected
properly, but no sound is audible.
• One or several GAIN and MASTER controls may
be turned all the way down. Dial in a higher
8
8
• A short circuit in the speaker signal chain may
3) The footswitch does not switch channels:
• The front panel selector switch may be in the
• The footswitch is not connected to the EDITION
4) When accessed, the LINE OUT/LINE IN
• An electrical or magnetic field is causing inter-
• The grounding of the connected devices may
5) You have connected an FX processor to
• The LINE OUT signal is overloading the input of
6) You have connected an FX processor to
® dealer.
• The FX processor's output level is set incorrectly.
setting.
have tripped an internal fuse. Make sure none of
the connections are shorted out and have a
qualified service technician replace the fuse
(identical specifications are a must).
LEAD position. Set it to CLEAN (in this case,
CLEAN = off).
BLUE™. Plug it into the appropriate jack.
jacks cause annoying hum.
ference. Use higher-quality cables or re-arrange
the cables you are using to reduce interference
to a minimum. If this still doesn't improve the
situation, use a DI box.
be causing a ground loop. DO NOT SEVER THE
GROUND OF THE CONNECTED DEVICES UNDER
ANY CIRCUMSTANCES! Try plugging all devices
into the same socket via an AC power distribu-
tor/power strip. If this doesn't eliminate the noise,
you must ensure the connection is galvanically
separated by routing the signal through a DI
box.
the LINE OUT jack and the signal is totally
distorted, even when you have dialed in a
clean sound.
the FX processor. Reduce the processor's input
sensitivity ("INPUT" or "GAIN").
the LINE OUT jack of the EDITION BLUE™
and the signal's volume level is way too
low.
Turn it up.