Audiovalve ASSISTENT 100 Mark 2 Instrukcja obsługi - Strona 13
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Drukuj stronęAssistent 100 – Mark 2
integrated tube amplifier_
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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: GU50
.
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 or in STAND – BY mode.
If a power valve in the ASSISTANT 100 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.
Please note: In the "STAND BY" mode the ABR red LED shinning too !!!
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, athough:
if the amplifier is in STAND BY mode, a LED on each power valvel
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.