Thermal Protection; Fan Filter Maintenance; Clip Leds - YORKVILLE AP2020 Owner's Manual

DC PROTECTION
In the unlikely event of the AP2020
going DC, a thyristor circuit will short the output
terminals and divert all potentially harmful
currents away from your speakers.

THERMAL PROTECTION

In the unlikely event that the AP2020
the signal will be sporadically cut off and the
PROTECT LED will stay on. If further heating occurs,
(due to some malfunction), an internal thermal
breaker will interrupt the primary circuit. There is no
visible indication of this rare condition. The
AP2020 is designed and tested to operate under AP2020 AP2020 AP2020
"worst case" conditions without shutting down, so if
you experience a thermal shut down you should
check for blocked air flow.
COOLING
The fan draws air in from the front and expels
hot air through the rear vents. This is compatible
with most installations. Since hot air rises, the
heated air forcibly expelled from the back tends
to rise away from the equipment rack. This draws
cool air from the floor upwards into the front of
the rack. In some cases where the rear of the rack
is obstructed, it may be necessary to install rack
fans to aid cooling. If there are no obstructions, no
secondary cooling is required.

FAN FILTER MAINTENANCE

The AP2020 AP2020 AP2020 is factory equipped with a fan filter AP2020
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 reliability. 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 Yorkville
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.
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.
AP2020's outputs
AP2020 AP2020
AP2020 overheats,
AP2020 AP2020
3

CLIP LEDS

The CLIP LEDS on the front panel will visibly
indicate any signal excursion beyond the dynamic
headroom of the amplifier.
RELIABILITY
The AP2020 AP2020 AP2020 AP2020 is designed and manufactured by
Yorkville Sound. 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 AP2020 AP2020 is conservative with respect to
AP2020 AP2020
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.
Yorkville's reputation as a manufacturer of reliable
equipment will be further enhanced by the AP2020
The AP2020 AP2020 is not only suitable for use in both
AP2020 AP2020
heavy duty touring sound reinforcement systems
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 operation. Its reliability in a fixed
installation running 4 or 8 ohm studio monitors is
without parallel.
AP2020. AP2020 AP2020