CHAPTER 3
Ofrating tfreAmPlifier
Povrcring ltqrr system on
After you have properly corurected your loudlpealiers to your power amplifiers and all your source
componelts and thepower amphfiers to the preamplifier you ate rcadyto power your system otl'
l. If you haven'r al,ready
done so, vrsually @y looking through the cagevent holes) ensure that all dre tubes
i'side the VTL ^.,-,p-li6.r
are properly seatedall the way i-nto their sockets. Make sure that the power
ampli6er is lot powered on atthis stage
by either discomecting it from the AC source or tuol the power
o1 sw,itch
on the front panel of the ampliEer to dre"of?' or "0" position.
Z. Porver on the sorlrcecompoltent(s) you ilrtcnd to tlsefor yotrr llstening sessiotr
3. porver op yorlr preamplifier. Make strre that your prealrlplifier is either in the mute state or ttrnr its
voltrme knob to the zero position-
4. Uslrg the power cord w,hichcomes with yotrr amplifier, coruect the one end oF the power cord to dle
..AC PC)WER" corurectoron the bottom argle oF
the back of the ampL6er. C-onnect
the odler end of dre
power cord to an electrical
or.rtlet
directlyLrto awall socket.
5. T..nr o1 the power a-rnplifier
in yotrr system.
The power-on su'itch is located on the right hand comer of
the amph6eris front panel. When the turit is powered off, the su'itch poutts ur the "0" position. Clickng
t6e su,itcho,r.. n,o6 on the turit and the su,,itch
is i-n
the "L". 'l'he
re is apower-otl LED to the left of dre
Frolt pa1el. The LED hght should be on when the systemispropedy powered on.
-Gaution: when you turn on your amplifier for the firct time, watch the tubes while they warm up and
observe if any of them goes into an exceptionally bright red glow on the plate of any of the tubes' Turn
the system off immediately and refer to your authorized VTL dealer or the VTL factory service dept. if
this happens. This glow may indicate a defective tube which needs to be replaced.
-Gaution: lf powering on the system using the above steps results in tripping a circuit breaker in your
house, or blowing a fuse on the amplilter, then turn oft the power amplifier and the rest of the system
immediately. Find the fuse box and turn the circuit on again to restore power to your house. Gontact
your VTL authorized dealer or the VTL factory customer support department immediately so that they
can help you resolve this Problem.
Grotrnd Loop Hum
If yo' getagrorurd
loopl'nrm
from yourstereo
system
after
insvrllation
ald tLrnt
otl you shotrld
immedrately
n,nr ofi thealrplifiers
andconsr.rlt
yourVTL dealer
or theVTL factory.Unde
r trocirctrmstallces
shotrld
yotr
attempt to lift or defeat
arlygrorurds
on electrical
eqtripment
pltrged into dre AC, as tl-rese
groturdsare
ilstalled for your and the equipment's
safety,
ald an turgtoturded
componellt call presentan extremely
ST-l 50 Owney's Manual
WL 7
