Owner`s manual

13
Ayon Audio – Hart 18 – 8101 Gratkorn – Austria – Phone: [phone]
www.ayonaudio.com
5.1 Automatic determination of the bias reference value (optimal tube operating temperature)
When the amplifier is in operation for more than 45 min (optimal tube operating temperature) an
additional bias reference control is performed after switch-off (the LEDs on the back are flashing in order
from V1 to V2 during the shut-down process). The measured bias-values are stored and used as a
reference value when the amplifier is switched on the next time in order to always provide the best
possible working point of the tube (wear out and ageing are taken into account).
● In case the amplifier is switched off after less than 45 min of operation the bias value is not measured;
the value stored last is used when the amplifier is switched on the next time.
1. Failure report and bias LED failure indication – bias value too high:
In case that during this process the reference control detects that a tube can no longer attain its optimal
values or that its functioning at 100% can no longer be assured (bias current too high value), B+ (high
voltage) is switched off, the Ayon logo flashes, and the respective tube is indicated by its corresponding
LED (V1, V2) on the backside of the amp glowing red. Note: The amp cannot be switched of manually
with the power switch.
What to do:
1. Set the power switch to OFF-position.
2. Pull off the power cable.
3. Assure yourself that the tubes are sufficiently cooled down (ca. 10 minutes).
4. Replace the tube concerned. Important: even though the AA62B tube is designed to be inserted
into the socket in only one orientation (with normal force applied), it’s possible to insert the AA62B
the wrong way (with significant force applied). This will cause damage to the tube and/or the
amplifier; always keep in mind that the two thick tube pins go into the large socket holes!
5. Connect the power cable again.
6. Switch on the amp; the tube test program is activated automatically. (See also section 6 for
correction of defects)
7. After the successful tube test the system automatically switches to operation, the Ayon-logo glows
permanently and the amp is ready for music reproduction.