Lectrosonics SMa - Manual (Page 12)

5
4
2
SMa Series
5-Pin Input Jack Wiring
The wiring diagrams included in this section represent
the basic wiring necessary for the most common types
of microphones and other audio inputs. Some micro­
phones may require extra jumpers or a slight variation
on the diagrams shown.
It is virtually impossible to keep completely up to date
on changes that other manufacturers make to their
products, thus you may encounter a microphone that
differs from these instructions. If this occurs please call
our toll-free number listed under Service and Repair in
this manual or visit our web site at:
www.lectrosonics.com
+5 VDC
Audio input jack wiring:
PIN 1 Shield (ground) for positive biased electret lava­
liere microphones. Shield (ground) for dynamic
microphones and line level inputs.
PIN 2 Bias voltage source for positive biased electret
lavaliere microphones.
PIN 3 Low impedance microphone level input for
dynamic microphones. Also accepts hand-held
electret microphones provided the microphone
has its own built-in battery.
PIN 4 Bias voltage selector for Pin 3. Pin 3 voltage (0, 2
+
BIAS 30uF
1k
Servo Bias
Pin 4 to Pin 1 = 0 V
Pin 4 Open = 2 V
Pin 4 to Pin 2 = 4 V
+
30uF
500 Ohm
200 Ohm
or 4 volts) depends on Pin 4 connection.
Pin 4 tied to Pin 1: 0 V
Pin 4 Open: 2 V
100 Ohm 1 GND
Pin 4 to Pin 2: 4 V
3 MIC 100 Ohm
To Virtual Ground
Audio Amplifier BIAS SELECT
To Limiter Control
LINE IN
PIN 5 High impedance, line level input for tape decks,
+
3.3uF
mixer outputs, musical instruments, etc.
SM Equivalent Input Circuit Wiring
10k
2.7K
TA5F Latchlock
Insert
Insulator
Strain Relief
TA5F Backshell
with Strain Relief
Remove strain relief if using dust boot
TA5F Backshell
(Strain Relief
removed)
Dust Boot (35510)
Note: If you use the dust boot, remove the rubber
strain relief that is attached to the TA5F cap, or the
boot will not fit over the assembly.
Installing the Connector:
1) If necessary, remove old connector from microphone
cable.
2) Slide Rubber Boot onto microphone cable with the
large end facing away from the microphone. (See illus­
tration above.)
3) If necessary, slide the 1/8-inch black shrink tubing
onto the mircrophone cable. (This tubing is needed
for some cables to ensure the cable fits snugly in the
rubber boot.)
4) Use the resistors and connector included with this kit
to configure the TA5F to your particular microphone.
(See Wiring Diagrams below.) A length of .065 OD
clear tubing is included if insulating the resistor leads
or shield wire is necessary. (Remove rubber strain
relief from connector backshell by pulling it out of the
backshell.)
5) Slide the Strain Relief over the TA5F Insert and crimp
as shown to the right. Then insert the TA5F Insert
and Strain Relief in the TA5F Latchlock. Screw the
TA5F Flex Relief onto the TA5F Latchlock.
6) If needed, position and shrink the 1/8-inch shrink tub­
ing on the microphone cable, then slide the Rubber
Boot down over the TA5F connector.
LECTROSONICS, INC. 12