Replacing Fuses:
WARNING: Please turn the unit OFF and disconnect the power cord before
proceeding.
There are five fuses in the VK-150. The main Slow-Blow fuse (10A rating for 110-
120VAC line voltage and 5A for the 200-240VAC range) is located on the unit’s back
panel. The four 3A Fast-Acting protection fuses are mounted on the VK-150 printed
circuit boards and can be acsessed through the holes in the amplifier bottom plate. If the
pilot LED on the front panel goes out, try replacing the main fuse on the back panel with
the same type fuse.
If one or more of the autobias LED’s has gone out, turn the unit off and wait for few
minutes before proceeding, allowing the internal electrical charge to dissipate. Place the
VK-150 on its side and hold securelly. Through the acsess holes in the bottom plate,
remove and replace the blown fuse with the 3A Fast-Acting type.
In either case, if the unit still fails to operate properly, please contact the factory for
professional service.
Factory supplied fuses should only be replaced with the same type and rating parts.
Replacing Output Tubes:
In order to replace the 6C33C-B output tubes, please contact the factory and supply them
with the unique identification number stamped on the side of the tube needing
replacement. This information will be used by Balanced Audio Technology to provide an
optimal replacement tube for your amplifier.
Please do not substitute any random tube as a replacement. Although the automatic
bias circuit in the VK-150 will accept virtually any random set of output tubes, the unit
will not be guaranteed to meet all of its performance specifications under such conditions.
Finally, the determination that a single tube replacement is prudent rests solely with the
customer, based on actual hours of use for the particular set of tubes. The factory
assumes no responsibility for possible performance decrease under such conditions.
