2
DSP0002
Figure 1: COM port settings for
D S P - 3
Try plugging
DPX-1 into a
different outlet
or measure
output voltage
of DPX-1 for
15 volts.
Does DSP-3 have
power (blue LED)?
No
Is the DPX-1
power supply
being used?
No
Is the amplifier a
CX, DCA or PL2?
No
Was amplifier
manufactured after
August 1999?
Yes
The DSP-3
requires the
use of an
external power
supply with all
other
amplifiers.
No
CX, DCA, PL2
amps made prior
to 8/99 do not
provide
adequate power.
Use DPX-1 or
send amp to
QSC Technical
Services for
modification.
Yes
Is a DPX-2
DataPort
cable being
used?
Yes
No
A 4 channel CX
or DCA
amplifier
requires two
DataPort
cables, one
from each pair
of channels to
each DSP-3.
The fuse in the amplifier may
have blown. Check voltage
across pin 9 & 6 of DataPort
connector on amp for 15V
power. Use DPX-1 or return
amp to QSC for repair.
Yes
Yes
START
Does DSP-3 go
online?
Yes
No
DSP-3s manufactured before
7/99, or DSP-3s that have the
word ’DATA PORT’ printed
between the RS-232 and
DataPort connectors on the
front label use a NULL MODEM
cable. In all other cases USE a
S T R A I G H T T H R O U G H
SERIAL cable. If in doubt, try
the opposite cable of what is
being used.
Does the DSP-3 go
off-line periodically?
Is the correct
COM port
selected?
No
Select the
correct COM
port in the
Tools>Options
> D S P m e n u .
Yes
No
See DSP-3
Signal Manager
Software Support
Troubleshooting
Guide.
DSP-3 Hardware Support Troubleshooting
Guide
The operating
system has not
been qualified
for use with
Signal Manager.
Signal Manager
may or may not
work with
operating
systems that
have not been
qualified.
Which operating system
is being used; is it: Windows 95
4.01.0970B B or OSR2, Windows
98, or Windows NT 4.0 w/service
pack 5 or later?
No
Yes
Check COM port
settings. See
Figure 1.
Is the DSP-3
connected to the
computer using the
correct cable?
Yes
No
Yes
Are there any
applications running
that use the same
COM port (ex. hyper
terminal)?
Yes
No
Reboot computer
and operate
Signal Manager
without other
applications
active.
Return DSP-3 to
QSC for repair.
Failed
No
