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Replacing the amplifier tubes |
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6. Hold the amplifier tube unit by the rear protective cylinders and
carefully insert the new tubes into the holders. Make sure that
the pins on the tubes fit properly into the holes of the connec-
tion sockets.
Arrange the tubes in the amplifier exactly as the tubes were
arranged in the box when delivered. All 8 tubes have been
carefully selected and perfectly matched to one another and
then placed in a specific arrangement to guarantee uncompro-
mising sound quality.
7. Replace the protective cylinders onto the tubes and tighten
the quarter turn fasteners by turning the protective cylinders
a quarter turn clockwise.
8. Replace the other tubes row by row.
To reset the tube replacement indicator (status LED lights orange
during operation) on the amplifier:
▷
Connect the power cable to the IEC mains socket of the
amplifier.
9. Simultaneously press the
CROSS FEED
-
OFF
and
HIGH
function
buttons on the remote control and then set the power switch
to
ON
to switch the HE 1 on. Press and hold the buttons on the
remote control for
at least 10 seconds
.
Make sure to point the remote control at the remote control
sensor located on the front bottom of the HE 1.
The tube replacement indicator is reset. The HE 1 switches off
(standby). The glass cover closes and the amplifier tubes and
operating elements retract to the “off” position. Subsequently,
the status LED lights up red. When switching the HE 1 on
again, the status LED lights up white again.
The replacement of the amplifier tubes is completed.
Summary of Contents for HE 1
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Page 35: ...4 EU RoHS 2011 65 EU Web www sennheiser com download WEEE 2012 19 EU Sennheiser...
Page 37: ...2 HE 1 ITO 8 1 2 HE 1 OFF LED 30 3 4 1 4 2 5 6 8...
Page 39: ...4 EU RoHS 2011 65 EU www sennheiser com download WEEE 2012 19 EU Sennheiser...
Page 41: ...2 HE 1 ITO 8 1 2 HE 1 OFF LED 30 3 4 5 6 8 7 8...
Page 45: ...2 HE 1 ITO 8 1 2 HE 1 OFF LED 30 3 4 5 6 8 7 8...
Page 47: ...4 RoHS 2011 65 EU www sennheiser com download WEEE 2012 19 EU Sennheiser...
Page 53: ...2 HE 1 ITO 8 1 2 HE 1 OFF 30 3 4 5...
Page 54: ...3 6 8 7 8 9 CROSS FEED OFF HIGH HE 1 ON 10 HE 1 HE 1 DE FR EN ES PT NL FI JA KO ZH TW ID RU AR...
Page 55: ...4 RoHS 2011 65 www sennheiser com download WEEE 2012 19 Sennheiser...
Page 57: ...2 HE 1 ITO 1 1 2 2 OFF HE 1 30 LED 3 3 4 4 5 5 6 6...
Page 59: ...4 RoHS 2011 65 EU www sennheiser com download WEEE 2012 19 EU Sennheiser...