Sennheiser HE 1 TUBE SET Bedienungsanleitung Seite 6

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
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.
Replacing the amplifier tubes | English
CROSS FEED - OFF and HIGH function
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