QSC Audio DSP0002 User Manual

Service Bulletin

Title: DSP-3 Product Troubleshooting Guide Bulletin #: DSP0002 Issue Date: July 18, 2001 Models Affected: DSP-3 Bulletin Revision: A Production Range: all

Description:

This bulletin is designed to solve problems that may be encountered while setting up the DSP-3 for the first time or creating a configuration for the first time. It can also be used to determine whether or not the DSP-3 needs to be serviced. This bulletin is separated into a Hardware Troubleshooting Guide and a Software Troubleshooting Guide. Hardware consists of the DSP-3 unit and DSP-3 accessories. DSP-3 accessories include the DPX-1 external power supply, the DPX-2 DataPort cable and the DPX-4 mounting bracket. The software is Signal Manager.

This troubleshooting guide does not address all possible problems that can arise when using the DSP-3 but does include most common problems.

Units Affected:

This bulletin applies to all DSP-3s. The Signal Manager software is subject to change without notice and changes may affect the Software Troubleshooting Guide.

Symptoms:

Symptoms are described on the following pages in the form of questions on a flow chart.

Instructions:

Determine whether the problem is hardware related or software related. Select the appropriate troubleshooting guide from the following pages. If the problem cannot be classified, start with the Hardware Troubleshooting Guide. Begin at the block labeled START and answer the yes or no questions outlined by diamonds. Follow the arrows according to the yes or no answer until a solution is found.

Tools and materials required:

• Multimeter (optional)

DSP0002 1

START

Does DSP-3 have

power (blue LED)?

Yes

Does DSP-3 go

online?

Is the DSP-3

connected to the

computer using the

correct cable?

Yes

Does the DSP-3 go

off-line periodically?

Yes

Are there any

applications running

that use the same

COM port (ex. hyper

terminal)?

Yes

DSP-3 Hardware Support Troubleshooting

Guide

Is the amplifier a

CX, DCA or PL2?

Yes

Was amplifier

manufactured after

August 1999?

Is a DPX-2

DataPort

cable being

used?

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

Is the correct

COM port selected?

Yes

Reboot computer

Signal Manager

Software Support

Troubleshooting

Is the DPX-1

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

STRAIGHT THROUGH

SERIAL cable. If in doubt, try

the opposite cable of what is

being used.

and operate

without other

applications

active.

See DSP-3

Guide.

Return DSP-3 to

QSC for repair.

power supply being used?

Select the

correct COM

port in the

Tools>Options

>DSP menu.

Try plugging

DPX-1 into a

different outlet

or measure

output voltage

of DPX-1 for

15 volts.

Failed

Yes

The DSP-3

requires the

use of an

external power

supply with all

other

amplifiers.

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.

A 4 channel CX

or DCA

amplifier

requires two

DataPort

cables, one

from each pair

of channels to

each DSP-3.

The operating

system has 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?

Yes

Check COM port

settings. See

Figure 1.

Figure 1: COM port settings for

for use with

Signal Manager.

Signal Manager may or may not

work with operating

systems that

have not been

qualified.

DSP-3

2 DSP0002

+ 2 hidden pages