blackVault AR4131 Folleto De Instrucciones página 11

Replacing the Vacuum Tube
Instructions
When to Replace the Vacuum Tube
The vacuum tube that is housed in the main unit of the speaker system
has been designed to provide years of trouble-free use. Even so, it may
become necessary to replace the tube at some point in the future. If the
quality of sound produced by the speaker system diminishes over time,
inspect the vacuum tube for any of the following signs that indicate
changing the vacuum tube is necessary:
• Vacuum tube is completely dark while the speaker system is
powered on
• The silver coating on the inside of the vacuum tube has turned
white
• The vacuum tube shows any signs of cracks in its glass casing
Note: In order to extend the life of the speaker system's vacuum
tube, it is recommended that the power button on top of the main
unit be turned off when the unit is not in use.
Changing the Vacuum Tube
Your speaker system came with a replacement vacuum tube (model
number 6DJ8 or equivalent). In order to replace the old tube with the new
tube:
1. Turn off the power to the main unit, unplug the power cord and
wait ten minutes for the vacuum tube to cool down.
2. Carefully remove the protective acrylic housing piece that covers the
vacuum tube by gently pulling the piece straight up. After the acrylic
housing is clear of the vacuum tube, turn the acrylic housing to the
side in order to remove it from the main unit.