Studio Technologies 200 - Manual (Page 23)

Issue 3, August 2004 Model 200 User Guide
Page 24 Studio Technologies, Inc.
make the interconnection, separate crimp
terminals are attached to loose wires and
then “snapped” into the housing. Molex
part number 08-50-0114 specifies crimp
terminals that are appropriate for wires of
22 to 30 gauge. These parts are available
worldwide from sources such as Digi-Key
(www.digikey.com).
To make the process of connecting to
the Model 200’s headers a simple task
an interface cable kit, part number 31087,
is available from Studio Technologies.
Each kit includes five cable assemblies
and a length of heat-shrinkable tubing.
Each cable assembly consists of a
mating connector with three color-coded
wires attached. These wires, nominally
12 inches in length, allow convenient sol-
dering to a connector installed in a spare
location on the Model 200’s back panel.
For reference, the wire color for pin 1 is
gray, pin 2 is yellow, and pin 3 is blue.
The heat-shrinkable tubing is provided
so that the connector solder cups can
be insulated from each other. It will also
provide some strain relief to the solder
joints. Be certain to slip the desired length
of tubing over the wire prior to soldering.
(If the writer had a dollar for every time
he forgot to put tubing on a wire (or slip
on a connector shell) before making a
solder connection…)
The Model 200’s enclosure must be dis-
assembled prior to installing connectors
in the spare locations. Four hex-head ma-
chine screws, two on the bottom front of
the enclosure and two on the back panel,
must be removed. A 5/64-inch hex driver
is required. The cover can then be care-
fully separated from the chassis, remain-
ing attached by means of a flexible cable
assembly. This “flex-cable” assembly links
the main printed circuit board assembly
with the board that contains the push-
buttons and LED indicators. Ensure that
the flex cable is not damaged while the
Model 200 is being customized. For
easier access, the pushbutton/LED board
assembly can also be easily removed.
The 3-position headers on the Model
200’s main circuit board assembly are
located close to their related input or out-
put connectors. The following list provides
the printed circuit board reference num-
bers and associated functions:
P3: Headphone output, pin 1 common,
pin 2 tip (left), pin 3 ring (right).
P4: Microphone input, pin 1 shield, pin 2
high, pin 3 low. Follows back-panel 3-pin
female XLR pin assignment.
P5: Main output, pin 1 shield, pin 2
high, pin 3 low. Careful! Back-panel 3-pin
male XLR has pin 1 floating, pin 2 high,
pin 3 low.
P6: Talkback output, pin 1 shield, pin 2
high, pin 3 low. Careful! Back-panel 3-pin
male XLR has pin 1 floating, pin 2 high,
pin 3 low.
P7: IFB input, pin 1 common, pin 2 DC
with channel 1 audio, pin 3 channel 2
audio. Follows back-panel 3-pin female
XLR pin assignment.
P9: External 24 volt DC input, pin 1
common, pin 2 +24 volts, pin 3 not
used. Back-panel 2.1 x 5.5 mm jack
has +24 volts on center pin. Header P8
is used by the back-panel 24 Vdc jack
assembly and is electrically in parallel
with P9.