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To seat each vacuum tube properly, ensure
that the PL-P is powered off, disconnect the
PLP-CCC3 AC power supply unit and
remove the top plate. If the unit has just been
powered off, please wait 5 minutes for the
vacuum tubes to cool down before handling
them. Wearing the glove supplied with the
Spare Tube Kit, place two fingers around the
flat top part of a vacuum tube to hold it firmly.
Push the vacuum tube very gently in a
downward, vertical motion until it is
completely seated.
In the unlikely event that vacuum tubes
became unseated in transit, please refer to
the following diagram to identify the vacuum
tube required at each socket position and
place them in the manner described above.
The PL-P is also furnished with two vacuum
tube usage timers. They are mounted
internally on the printed circuit board as per
the following diagram. The one on the left
corresponds with the two vacuum tubes used
in the phono stage and the one on the right is
for the vacuum tubes used in the line stage.
When the power is turned on, these usage
timers will individually time the usage of the
vacuum tubes in their respective stages, up
to the maximum limit of 5,000 power-on
hours.
When either or both timers indicate close to
the 5,000-hour maximum, vacuum tube
replacement is recommended. We suggest
that you use the Spare Tube Kit available
from your authorized dealer, which includes
Nagra-tested vacuum tubes as well as two
new usage timers.
