VTL TL2.5, Owner'S Manual

Plugging in a new tube 

Consult the figure above to make sure that you are inserting the correct tube type into 
the correct socket.  Hold onto the upper portion of the tube towards its tip. Lower the 

tube onto the socket, making sure that the pins from the tube matches the 
holes in the socket.  There are two pins on the tube which are spaced at a 
wider distance from each other than the rest of the pins.  Make sure that 
these two pins go into the side of the socket which matches that distance.  
Press the tube firmly into its socket, using a gentle force and a slight 
“rocking” motion.  When the tube is properly and completely inserted into 
the socket it should be firmly implanted and does not give in to any 
movement at all when you try to rock it. 

After you’re satisfied with all the changes you made inside the preamplifier 
box you are ready to put the unit back together. 

Replacing the chassis cover 

Lower the preamplifier’s cover chassis slowly back into the opened 

preamplifier box, making sure that the cover is put on in the correct front and back 
position.  Locate the screws which were removed from the cover and put them back 
on the cover.  Tighten all screws to make sure that the cover is securely put back to the 
unit.  

Changing the Main Fuse 

The primary mains fuse for your preamplifier is rated 1A Slo Blo (120Volt AC) or .41 
A Slo Blo (240 Volt AC).  The mains fuse is housed in a holder located on the back 
panel of the unit.  To change the fuse make sure the unit is powered off.  Disconnect 
the AC power cord from the unit.  Move the preamplifier so that you can work with 
the panel in the back.  Locate the mains fuse holder and turn the knob in a counter-
clockwise direction while pressing inwards to loosen it.  The fuse cap should come out 
from its housing with the fuse held inside the cap.  Take the fuse out and  replace it 
with a new one.   

WARNING: For continued protection against fire hazard only replace the fuse 
with the same type and rating as was originally specified for the preamplifier.  If 
you have problems locating the correct fuse contact your VTL dealer or the VTL 
factory service department. 

TL2.5 Preamplifier Owner’s Manual 
VTL 

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