VTL IT-85, Руководство пользователя

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IT-85 Integrated amplifier
Owner’s Manual
VTL 26
1. Plugging in a new tube: 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 (9 pin miniature tubes),
or there is a locating pin in
the middle of the tube (8
pin octal tubes). 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 cage:
Lower
the IT-85’s cover chassis
slowly back onto the opened IT-85 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. Tighten
all screws to make sure that the cover is securely fastened to the unit.
Changing the Main and B+ Fuses
The B+ fuse for your IT-85 is rated at 1A ceramic Fast Acting. There is also one
primary mains fuse rated at 6A Slo Blo (100/120Volt AC) or 3A Slo Blo (220/240
Volt AC) ceramic. The B+ fuse is housed in a fuse holder located on the back panel
of the IT-85, and the mains fuse is housed in a separate holder also located on the back
panel of the unit. To change either fuse make sure the unit is powered off, and
disconnect the AC power cord from the unit. Move the IT-85 so that you can work
with the panel in the back. 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, to 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 downward while turning it in the clockwise direction to
lock it in place. Use the same procedure to replace the B+ fuse.