LANSCHE AUDIO
OPERATING INSTRUCTIONS No.3
Page 10 / 14
NOTE:
Please be aware the CORONA plasma tweeter operates at 100% power even when
no music is being played. It is therefore recommended that when you are not
listening to music you turn off the tweeter power by the power switch
(2)
located
near the top at the rear of the speaker cabinet.
3.4. Removing and Installing a CORONA Plasma Tweeter
How to remove the tweeter:
a. Switch off the speaker‟s power and remove its AC plug.
b. Switch off the source components.
c. If the CORONA was powered on please let it cool down for 15 minutes.
e. Only after the LED in the logo
(7)
on the speaker has fully extinguished can you remove the three
screws supporting the CORONA. Remove the lower center screw last whilst supporting the
CORONA‟s horn with your hand, this avoids stress being put on the CORONA and the cabinet‟s
threaded screw inserts.
Carefully pull out the CORONA (be aware it is connected to a power cable and a speaker
cable).
f. Unscrew the safety ring on the power cable‟s metal plug and then pull out the plug.
g. Pull out the black minus speaker cable. Pull out the red plus speaker cable.
h. When installing, precede in reverse order ignoring step c.
CAUTION:
Let the CORONA cool down for 15 minutes before removing.
NOTE:
CORONA plasma tweeters are highly sensitive electronic devices. Please protect
them from mechanical impacts or other mechanical influences.
3.5. Cleaning procedure
The CORONA's electrode which is located in the center of the horn requires periodic cleaning. Over
time, dust and other particles leave deposits on it. These deposits will affect the starting of the
CORONA, produce noises and make an uneven plasma ball size. It is recommended you perform
such cleaning about every month of normal use. More frequent cleaning will be required if the
speakers are used in dusty environments, in rooms where windows are often left opened and in high
humidity areas.
a. Make sure the CORONA has been powered off for at least 15 minutes.
b. Locate the electrode which is dead center in the horn.
c. Carefully insert the provided cleaning brush until you feel it touching the electrode.
Try not touch the paintwork of the horn with the cleaning brush, scratches could occur.
