Studio Technologies 230 2014 - Manual (Page 41)

Model 230 User Guide Issue 9, November 2014
Studio Technologies, Inc. Page 41
circuit board, are Molex® part number
22-23-2031. They mate with Molex housing
number 22-01-3037. To make the intercon-
nection, separate crimp terminals are at-
tached 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, website
www.digikey.com.
To make the process of connecting to the
Model 230’s headers a simple task an inter-
face cable kit, part number 31087, is avail-
able from Studio Technologies. Each kit
includes five cable assemblies and a length
of heat-shrinkable tubing. Each cable as-
sembly consists of a mating connector with
three color-coded wires attached. These
wires, approximately 12 inches in length,
allow convenient soldering to a connector
slated to be installed in a spare location on
the Model 230’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 in-
sulated 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 a connec-
tion! (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 230’s enclosure must be disas-
sembled prior to installing connectors
in the spare locations. Four hex-head
machine 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
carefully separated from the chassis,
remaining attached by means of a flexible
cable assembly. This “flex-cable” assem-
bly links the main printed circuit board
assembly with the board assembly that
contains the pushbuttons and LED indi-
cators. Ensure that the flex cable is not
damaged while the Model 230 is being
customized. For easier access, the push-
button/LED board assembly can also be
easily removed.
The 3-position headers on the Model
230’s main circuit board assembly are lo-
cated close to their related input or output
connectors. The following list provides the
printed circuit board reference numbers
and associated functions.
P3: 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 P12 is used
by the back-panel 24 Vdc jack assembly
and is electrically in parallel with P3.
P4: Headphone Output, pin 1 common,
pin 2 tip (left), pin 3 ring (right).
P5: Microphone Input, pin 1 shield,
pin 2 high, pin 3 low. Follows back-panel
3-pin female XLR pin assignment.
P6: 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.
P7: Line-level Talkback Output 1,
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.
P8: Line Input 1, pin 1 common,
pin 2 high, pin 3 low.
P9: Line Input 2, pin 1 common,
pin 2 high, pin 3 low.