Crown LM-200A - Page 2

Crown International, Inc.
P.O. Box 1000
Elkhart, IN 46515-1000
TEL: 219-294-8000
FAX: 219-294-8FAX
@crown
®
LM-200A
©
1997 Crown International, Inc.
Specifications subject to change without prior notice.
Crown
®
is a registered trademark of Crown Interna-
tional, Inc.
8/97 125137-1
Fig. 3b
Fig. 3c
LM-200A Schematic
2.2K
.1µF
.1µF
20K
20K
.001
µF
2.2K
10K
3
2
1
+
_
47K
.047
µF
B
+
.47µF
100K
IC2
6
5
4
_
+
7
4.7K
4.7K
22µF
50V
100K
22µF
50V
IC1
220
Q2
90.9K
3
5
1
2
6
7
+
+
2.2µF
Q1
100K
2200µF
16V
6.8K
100K
220
4
J2
3
47µf
50v
1K
.1µF
J1
1
2
270
500
.1µF
.1µF
2
1
3
AUDIO
GND
AUDIO
P2
ELECTRONICS MODULE
AUDIO
GND
SHIELD
MICROPHONE
CAPSULE
FB1
FB2
P1
8
+
_
+
+
B +
MICROPHONE HOUSING
Jumpers J1 and J2 shown in phantom mode at 1 and 4.
For 12-24V DC operation, move J1 and J2 to positions 2 and 3.
tern top in the center of the three 1/8"-diam-
eter holes. The microphone cable will run
through this hole. Alternatively, you can run
the cable along the top of the lectern and
down the side, so that no cable hole is
needed.
3. Using the supplied mounting screws and
washers, screw the swivel mount to the
lectern top. Screw down the mounting
screws securely. Do not overtighten. Some
slight wobbling of the base is normal when
the microphone is moved.
4. If you want unlimited microphone rotation,
remove the set screw in the base of the
microphone. Caution: If the boom arm is
rotated fully around, it may twist the cable
and break it.
5. Using woodscrews, mount the base plate
of the electronics module inside the lectern
or wherever desired. You can remove the
module cover by undoing the screws on the
side of the module.
Powering: The LM-200A is factory set for
use with 9-48 volt phantom power. To
change to 12-24 volt DC power, see instruc-
tions inside electronics module cover.
Connections: Connect the LM-200A cable
spade lugs, and your microphone cable, to
the electronics module as shown in Figure
3b.
Warning: Do not lubricate the microphone
swivel mount, as it may lose its friction
and not stay in place. Use only mild soap
and water to clean the microphone.
Tension Adjustment: If the swivel becomes
loose, remove the swivel mount from the
lectern and look under the mount. You’ll see
a ring with two holes 180 degrees apart.
Place the tips of a needlenose pliers in these
holes, and rotate the ring clockwise until the
swivel is sufficiently tight. Remount the unit.
Architects’ and Engineers’ Specifications
The microphone shall be the Crown model
LM-200A or equivalent. The microphone
shall be a supercardioid electret-condenser
type with a built-in shock-mounted swivel
mount and pop-filter grille. Permanently
attached to the microphone shall be a 6-
1/2', two-conductor shielded cable that
connects to a supplied electronics module.
The microphone shall be powered from 9 to
48 volts phantom powering or 9-24 volts
DC. Frequency response shall be uniform
from 80 Hz to 15,000 Hz. Open-circuit sensi-
tivity shall be 6.0 mV/Pa. Impedance shall be
150 ohms balanced. Maximum SPL capabil-
ity shall be 120 dB SPL at 3% THD. Equiva-
lent noise shall be 28 dBA typical (0 dB
=.0002 dyne/cm
2
).
Models ending in “P” shall be black finish;
models ending in “B” shall be brown finish.
The Crown Model LM-200AP or LM-200AB
microphone is specified.
Microphone Warranty
Crown professional microphones are guar-
anteed unconditionally against malfunction
from any cause for a period of three years
from date of original purchase. See enclosed
warranty sheet for additional information.
Service
If the unit fails to work, replace or repair any
additional mic cables, or check the power
supply. If service is required, return both the
microphone and its interface in their original
packaging to Crown Service Department,
Plant 2SW, 1718 West Mishawaka Road,
Elkhart, IN 46517. For further assistance or
technical support call 800-342-6939.
At the factory, the electronics module is
matched to your particular microphone’s
frequency response. If you determine that
just the microphone or the module needs
service, send both anyway. Then we can
match your electronics to your micro-
phone. The serial number is on both
pieces.
2.00
2.80
SUPER CARDIOID
MICROPHONE
SHIELD
BLACK
W
HITE
MIC OUT
_
+
AUDIO
AUDIO
GND
MIC IN
12-24 VDC
1.25
3.90