Fault Leds; Fan Filter - Crest Audio CKd 604 Owner's Manual

by turning the channel attenuators > -∞, or through software control.
Please note that when a channel is deactivated by the rear panel
attenuator, it can not be set active through software control.
5. Channel Signal LEDs
Indicates presence of a signal.
6. Channel ACL/IGM LED
The ACL (Automatic Clip Limiter)/IGM (Instantaneous Gain Modulation
LED indicates the channel protection limiter is active because it either
exceeded its maximum voltage (ACL) level or current (IGM) level or
temperature. The temperature limit is distinctly noted when the channel LED
is continuously and dimly lit. See Page 14.

7. Fault LEDs

Each Channel has a fault LED which indicates channel Faults. When
lit, the channel will not pass audio.
8. Mute LEDs
Each channel has a Mute LED. If a channel is muted, this LED will
light. The Mute LED's also denote Faults when a Device or Power
Supply Fault occurs. Please see appendix for more information.

9. Fan Filter

A high-efficiency DC fan draws cool air into the amplifier though the
safety grill and removable dust filter. Do not block this intake! The
variable speed fan operates when the unit is "Active". Fan filters are
easy to remove and should be cleaned regularly to ensure optimum
performance.
10. Power Supply Breaker
Magnetic circuit breaker for power supply.
.
11. Three-position Power Switch
With this switch in the "up" position the amplifier is "Active" (On). The
middle position is "Standby" (Off) and the lower position is marked
Remote. When switched to Remote, the amplifier must be activated
by the sequential turn on/turn off (STO) circuit or NexSys or NWare
software.
CKd Series Owners Manual v1e
CKd Owner's Manual
Because of the
complexity of the design
and the risk of electrical
shock, all repairs must be
attempted only by
qualified technical
personnel. If the unit
needs to be shipped
back to the factory, it
must be sent in its
original carton. If
improperly packed, your
amplifier may be
damaged.
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