QSC DSP-3 Service manual

Service Bulletin

Title: DSP-3 PLD Update
Bulletin #: DSP0007 Issue Date: June 27, 2003
Models Affected: DSP-3 Bulletin Revision: A
Production Range: 07/2000 through 06/2003

Description

During severe faults in which a DSP-3 internally resets itself, DSP-3s manufactured before June of 2003 may not mute the outputs.

Symptoms

Affected DSP-3s will emit audible popping only during an internal reset which occurs after a severe fault is detected.

Instructions

If the DSP-3 has exhibited an audible popping noise, investigate and correct the fault before continuing with this update. See the
DSP0006 service bulletin. The following procedure describes the steps required to update the PLD in a DSP-3. The PLD firmware
version 3.0 corrects the symptoms above.

T ools and materials required:

• Grounded anti-static wrist band and work surface

• Personal computer (PC) with Windows (98/2000/NT) operating system and Lattice Semiconductor ispVM™ System software
(downloadable from Lattice Semiconductor’s web site: http://www.latticesemi.com) and QSC Signal Manager software
installed

• ispDOWNLOAD™ cable and parallel port interface box (available from Lattice Semiconductor)

• RS-232 serial cable (straight through)

• JEDEC file containing the update code (QSC part # PG-000060-00, available from QSC Technical Services)

• DPX-1 external power supply

• Card edge to 8-pin header adapter (Figure 1)

Figure 1. Card-edge to 8-pin header adapter.

Procedure: Preparing the DSP-3 for the download

1. If the DSP-3 is powered by an amplifier, first turn the amplifier off; then disconnect the DSP-3. Note that hot swapping or

disconnecting the DSP-3 while the amplifier is on could cause a fuse inside the amplifier to blow. If the DSP-3 is powered
remotely, unplug the external power. Disconnect all inputs and outputs and wait 10 minutes for internal voltages to bleed
down.

Continued on next page

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1DSP0007 rev. A

2. On the back of the DSP-3,

remove the four screws
securing the cover.

3. Remove the four screws

securing the board assembly to
the chassis. Gently pull the two
boards out of the chassis.

4. Attach the card edge connector

to the appropriate side of the
DSP-3’s 6-layer board. If the
two boards become loose or
disconnect, reattach them.
Connect the 8-pin header to
the ispDOWNLOAD™ cable and
plug the cable into the parallel
port of your PC.

5. Plug in the external power

supply and verify power using
the blue LED indicator. The
DSP-3 module is now ready for
the download.

Figure 2. The ispVM™ System window.

Procedure: Updating the PLD

1. Start the ispVM™ System application. The following steps use screenshots of Version 13.0.1 installed on a Windows XP

Professional system; other versions of ispVM™ System may look different. A window like that in Figure 2 will appear.

2. Click Edit followed by Add Device.

3. Type an appropriate description in the Part Description box, then click Select (Figure 3). In the Device Family box select

ispLSI 2000VE. Click 2032VE in the Device list and 44-pin TQFP in the Package list. Click OK.

Figure 3. Select the ispLSI2032VE 44-pin
TQFP PLD, browse for the firmware file
and type a part description.

2DSP0007 rev. A