Da-Lite Cambridge Lectern - Manual (Page 3)

3
The Da-Lite sound system is modular in design for ease of
service. The power supply and amplifier are accessed inside
the lectern body. The controls are accessed by removal of
dash panel.
If your lectern fails to operate on a known power source, be
sure to check the circuit breaker located on the Power Supply
for a tripped condition. Reset to restore function. If breaker
continues to trip, discontinue use of product until problem can
be diagnosed.
Service
Sound Models
Plug microphone into shock mount on reading surface. Turn
main power switch located under reading surface on. Rotate
"MAIN MIC", "TREBLE" and "BASS" controls fully counterclockwise
to minimum volume position. Turn speaker switch located on
dash panel to
"on" position. While speaking into the microphone,
slowly increase "Main Mic" volume by turning knob clockwise.
Adjust until feedback begins, then decrease volume to stable
condition or lower to desired volume level. Adjust bass and treble
controls to desired tonal quality. Turn SPEAKER SWITCH to
"off"
position when done using the sound system.
Auxiliary Microphone (XLR Jack)
The auxiliary mic input is located under the reading surface and
is used for a second mic or wireless microphone input. The
volume control is located on the dash panel. The aux. mic input
is balanced low impedance (600
Ω) and is phantom powered so
condenser type microphone can be used.
Auxiliary Line Input (1/4" Phone Jack)
The auxiliary input is used for playback of tape
player, musical instrument, VCR, or an audio feed
from another sound system. The volume control
is located on dash panel.
Auxiliary Line Output (1/4" Phone Jack)
The signal output is a composite of all the inputs and can be fed
directly to an audio or video tape recorder. Or, the line output
can be fed to another sound system to combine systems for
greater output, or it may be fed to the input of a hearing
impaired system.
External Speaker Outputs (1/4" Phone Jack)
The external speaker outputs can be used to drive external
speakers in lieu of the internal lectern speaker. When a plug is
inserted into the external speaker jacks, the internal speaker is
disconnected. The powerful (50 watts) is adequate to drive
several speakers provided the total load impedance is not less
than 2 ohms. The output of the amplifier is self-protecting against
overload; however, low impedance loads (below 2
Ω) will cause
excessive heating reducing amplifier output.
Light Height Speaker
Clock
Digital Clock-Timer
Minute
Timer
Set Mode
Hour
On Up On
Off Down Off
Main MIC. AUX. MIC. AUX. Line Bass Treble