Laney LIONHEART L20H Manual Del Usuario página 10

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L20H USER MANUAL - EN
• To change a tube: switch off the unit and unplug from the mains supply. Wait for the
tubes to cool down. Lay amplifier down on its front face and remove the protective grille
held in place with four screws. You should now be able to access the underside of the
amplifier chassis. Preamp tubes are protected with a screen can, to remove; gently twist
the screen can anti clockwise and then pull up. The tube can then be gently pulled out.
Take care when pushing the new tube in to make sure the pins are all aligned properly.
Output tubes have a spring retainer which must be pulled away before the tube will come
out.
• Amplifier connection: To avoid damage, it is advisable to establish and follow a pattern
for turning on and off your equipment. With all system parts connected, effects processors
etc. BEFORE turning on your guitar amplifier. Many products have large transient surges
at turn on and off which can cause damage to your speakers. By turning on your guitar
amplifier LAST and making sure its volume controls are set to minimum any transients
from other equipment will not reach your loudspeakers. Wait until all system parts have
stabilised; usually a couple of seconds. Similarly when turning off your system always turn
down the Volume controls on your guitar amplifier and then turn off its power before turning
off other equipment.
• Cables: never use shielded or microphone cable for any speaker connections as this
will not be substantial enough to handle the amplifier load and could cause damage to your
amplifier system.
• Caution: These professional loudspeaker systems are capable of generating very high
sound pressure levels. Use care with placement and operation to avoid exposure to
excessive levels that can cause permanent hearing damage.
Servicing: The user should not attempt to service these products. Refer all servicing to
qualified service personnel.
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