Studio Technologies 50 2005 - Manual (Page 29)

Model 50/51 User Guide Issue 7, August 2005
Studio Technologies, Inc. Page 29
disconnecting the cable that is plugged
into the talent amplifier output connector.
Perform the disconnection directly on the
Model 50’s back panel. The LED should
stop lighting. Now check through all the
wiring to determine where the short circuit
condition is located. The Model 50 will not
be damaged if the Over Current LED is
lighting so you should use it to help you
locate the fault in your system. In just a
few minutes you should be able to isolate
exactly what cable or talent amplifier is
causing the problem.
Control Console Over Current LED
During normal operation the control con-
sole Over Current LED should not be lit.
It will flash on and off if the power source
that supplies the Model 51 Control Con-
sole is loaded to exceed its maximum
output current. The most common reason
for an over current condition would be a
shorted 5-conductor MIDI-style intercon-
necting cable. A major fault in the Model
51 would also cause the LED to light.
If the LED does light, you should find
troubleshooting very easy. Begin by dis-
connecting the cable that is plugged into
the Control Console/MIDI In connector
on the Model 50’s back panel. The LED
should stop lighting. Reconnect the
cable to the Model 50 and disconnect the
cable’s other end from the Model 51. If
the LED still lights you have a bad cable.
If the LED does not light there is a problem
with the Model 51. Replace the cable if it
proves to be bad—remember you’ll need
a MIDI-style cable with all five conductors
connected. If the Model 51 appears to be
at fault it will need to be returned to the
factory for repair.
Troubleshooting
If you’re having problems getting the
StudioComm system up and running, this
section can help. If you haven’t read the
other sections of this guide, you should
do so before proceeding.
If the Model 51 Doesn’t Work At All
Your StudioComm system was supplied
with a 5-conductor DIN-type cable that
is used to connect the Model 51 Control
Console to the Model 50 Central Control-
ler. This cable has an important charac-
teristic; it implements all five conductors.
This means that all five pins on each plug
connect to each other using a length of
5-conductor cable. If you choose to use
your own cable it’s easy to get in trouble;
many MIDI cables only have three con-
ductors! You must use a 5-conductor
MIDI-style cable or the Model 51 will not
power up and function. Five conductor
MIDI cables are not hard to find, but you
must ask for them and ensure that you
get what you asked for. Be warned!
Talent Amplifier Over Current LED
During normal operation the talent ampli-
fier Over Current LED should not light. It
will flash on and off if the talent amplifier
output is loaded to exceed its maximum
output current. The most common reason
for an over current condition would be a
shorted interconnecting cable. Also, con-
necting more than the specified maximum
of four Model 35 Talent Amplifiers can
also cause the LED to light. Possible, but
not likely, would be a fault condition in a
Model 35.
If the LED does light, troubleshooting
should prove quite simple. Begin by