Changing The Main, Output Stage And Power Supply Protection Fuses - VTL TL6.5 Owner's Manual

1. Plugging in a new tube:
6.5's cover chassis slowly back onto the opened TL 6.5 box, making sure
that the cover is put on in the correct front and back position. Locate the
screws that were removed from the cover and put them back in the
correct holes. Replace the sides and tighten all screws to make sure that the
cover is securely fastened to the unit.
Changing the Main, Output stage and Power
Supply Protection Fuses
The Main fuse is housed in a fuse holder located on the back panel of the TL 6.5, and
is rated at 2A Slo Blo (100/120Volt AC) or 1A Slo Blo (220/240 Volt AC) ceramic.
The power supply and output stage fuses for the TL 6.5 are rated at 0.063A 20mm
Fast Acting type. The output stage protection fuses are housed in separate holders
located on the output stage modules inside the unit, and the power supply protection
fuses are housed in board mounted fuse holders located inside the unit..
The only fuse that is user serviceable is the Main AC fuse. To change the AC fuse first
ensure the unit is powered off, and disconnect the AC power cord from the unit.
Move the TL 6.5 so that you can work with the panel in the back of the chassis.
The type of fitting used for the fuses is called a bayonet fit, which describes the action
needed to remove the fuse cap. Locate the Main fuse holder, and loosen it by inserting
a flat head screwdriver into the slot and turning the screw head approximately one
quarter of a turn in a counter-clockwise direction while pressing inwards. The fuse cap
should spring out from its housing with the fuse held inside the cap. Take the fuse out
and replace it with a new one, and insert the fuse cap back into the holder, pushing it
TL6.5 Preamplifier Owner's Manual
VTL
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 match the
holes in the socket. There are either 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
locators go into the side of the socket that matches.
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 seated and does not give in to any
movement at all when you try to rock it gently. If
the socket appears loose and not making contact
with any or all of the tube pins, the socket should be
re-tensioned.
2. Replacing the protective cover:
43
Lower the TL