Assistent 30 integrated tube amplifier__________________________________
AUTOMATIC BIAS CONTROL FUNCTION ( ABR )
Every QQE 03/12 power tube is controlled by an unique complete automatic bias regulator for
each system in the tube.
When the amplifier is warmed up, the red ABR - led next to each power tube will not
shinning by correct function the power tube. Only when a tube is faulty the red LED
shinning up, then you have to chance its tube.
CHANGING VALVES AND POWER VALVES
IMPORTANT before changing a valve you must remove the mains lead from
the IEC socket and allow the valves to cool down. Touching a hot valve can
cause very serious burns.
Standard power valve type: QQE 02-12.
Automatic Bias Regulator (ABR ) function and interpretation
Each power valve is controlled by an ABR for each circuit within the
Valve.
There are two LEDs right side each power valve circuit. These LED`s
indicate the status of the valve when the amplifier is in OPERATE
mode and will light if the valve malfunctions in some way.
If a power valve in the ASSISTENT30 falls in performance to the point
where it needs to be changed, the appropriate ABR circuit will
indicate this by lighting LEDs next to the valve that needs
replacing.
Exchange the faulty valve for a suitable replacement from the list
above. You need only exchange the faulty valve as the ABR
automatically adjusts the interrelationship between the valves to give
optimum sound.
AudioValve will supply individual replacement valves (or complete
sets of valves) through its distributors at an extremely competitive
price.
Once you have changed the faulty power valve the LEDs should go
out. If this or any other of the LEDs remains lit, turn the amp off at the
POWER switch and contact your AudioValve dealer. Under normal
operating conditions none of the LEDs are lit. A LED on each power valve
light up, and when the amplifier is being driven to very high output levels it is normal for
the LEDs that monitor the valve circuits to simultaneously light dimly.
To Next Page
Loading...