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HIGH TEMPERATURE LED S (4)
lftheC$-900 is continuously operated into2ohm loads orloworlorany considerable length of time or 11 the ambient temperature of the air
supply were to become loo hot to provide adequate cooling even under normal
4
ohm loading situations»than the amplifier internal heat
sinks could reach unsafe operating temperatures. When this occurs, then the thermal logic eystem will shut down the unsafe channel,
causing ihe hightemperalureLEDtoljghlandlhe''0"LEDto gooulonthat channel. SincetheCS-900 isaredundantamplifier, the shutdown
ofonechannelwill notaffectthe operation ofthe other channel. Aftertheunsafechannel cools down tosafe limits, operation will be restored
in that channel. Normal operation will be indicated by the high temperature LED off and the "O ' LED on. Continued operation under fault
conditions will In noway harm theampilfier. but because of the nuisance factor, steps should betakento determine the problem and sofveit.
Because of the very efficient design of the CS-000 dissipation system, thermal shutdown conditions will almost never occur unless the re is
truly an external fault. For continuous operatron, the CS-900 requires a source of cool air. As an adoeo help In locating mismatched or
shorted speakers, the DDT active LED is a powerful tool. Ifthis LED flashes continuously at relatively low output power levels (Indicated by
low power readings on the LED array), it is almost a sure sign that the amplifier loading is too low in value or that there might be a short.
Remember, usually the power LED array should reach 100% indication before the DDT system Is activated on any particular charnel.
TheCS-900also has a fail-safe thermal mechanism built Into the unit. If either channel thermal logic system should fail to causethermal
shuldowninlhatchannelorlfthefanllselfshouldfali, then this fail-safesystem will shut down the entire amplifier, just as If you had turned
off the power switch. This is just on© more protection that Peavey has incorporated into this unique amplifier as a backup system. It this
should ever occur, Immediately seek professional help at a Authorized Peavey Service Center,
MAINS POWER SWITCH (5)
The front panel of the CS-900 contains a conventional type on/off rocker switch. When the amplifier is plugged mto a suitable power
source, activating this switch should light both channerO" array LED's afterthe power-up delay sequence is completed (approximately two
seconds). You shouldalso be able to heartheoutpul relays close (dick). If theamplifier is cool, the fan should start on low speed operation. If
only one channel "0" indicator lights, then the possibility exists that the mains fuse on the other channel has blown. If neither channer'0''
indicator lights, Ihencheck the mam powersource. It'salways a good idea to check toseethatthe fan is operational, especially on a new unit.
The possibilityexiststhat due to shipping and handling, the fan bearings might be tootight to allow low speed fan operation. If this Is the
case, Immediately seek professional help. The CS-900 must have normal fan operation to provide adequate cooling for the unit Without
airflow, the amplifier will "thermal" very quickly under any signal conditions.
BACK PANEL
The back panel of the CS-900 contains a 'back porch' design which contains the various input and output connectors for each channel.
Also Included Is the patch panel to provide the user with a very flexible system to facilitate the use of balanced input transformers and dual
crossover networks. These features are undu plicated In any other stereo power amp on the market today. The back panel also includes Ihe
fan opening with protective grille (6) where cooling air is drawn Into Ihe amplifier. This opening should never be blocked or restricted.
FUSES (8)
The
CS-900
is fused with a standard 15 amp, 125
VAC
fuse.
Always
replace
with
the same type and rating. Failure to do this
could
void the
warranty on the CS-900.
MODE SWITCH (16)
The mode switch is located on the "back porch'nextto the channel (nputjacks.This switch converts the CS-900 from normal stereo mode
to bridge mode. Unlesstheamplifier Is to beused In a commercial sound distribution system (70/100 volt Unes),tfie bridge modeshould not
be used. In certain crossover applications, accidental switching to the bridge mode could destroy the speaker system. Applications of the
bridge mode will be covered later in this manual.
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