YORKVILLE VTC Pro Audio V42 Manuel De L'utilisateur page 6

15. Reliability
The V42/V44 is designed and manufactured by VTC Pro Audio. Each unit undergoes a thorough,
temperature cycled burn-in period, and each circuit is tested by both manual and sophisticated
computer controlled equipment which is capable of identifying any deviation from the design
center parameters. The design of the V42/V44 is conservative with respect to the power handling
capabilities of the output devices. The topology guarantees that thermal stress not secondary
breakdown will set the limits of operation; while the computer optimized heat dissipation system
insures that excessive thermal stress will not occur. VTC Pro Audio's reputation as a manufac-
turer of reliable equipment will be further enhanced by the V42/V44.
tems but also when high headroom and low distortion are needed to fully reproduce the dynamic
range and clarity of today's CD recordings. It is built to survive grueling road conditions and
constant 2 ohm (4 ohm in the V44) operation. Its reliability in a fixed installation running 4 or 8
ohm studio monitors is without parallel.
16. Fan Filter Maintenance
The V42/V44 is factory equipped with a fan filter mounted on the air-intake grill located on the
amplifier's front panel. Regular cleaning of this filter will increase the amplifier's long term reli-
ability. The filter should be removed and washed at the first sign of visible clogging. This will
typically occur every four to six weeks depending on use and environment. Replacement filters
are inexpensive and can be ordered through VTC Pro Audio dealers. The foam filter should be
removed if a regular inspection schedule is not going to be followed. The amplifier can operate
without the filter in place, but the amplifier should be cleaned internally by a qualified service
technician when dust is visible on the heatsink fins.
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The V42/V44 is not only suitable for use in both heavy duty touring sound reinforcement sys-
Note: In an unusually dusty location, without regular filter inspections, removing the
foam filter can extend the operating time before thermal shutdown could occur. At
that time, the internal heatsinks should be cleaned thoroughly.
AIR FILTER REPLACEMENT and MAINTENANCE DIAGRAM
VTC#8380
Foam Filter
VTC#8807
Mounting Screws