QSC Audio Speaker HPR0002 User Guide

Service Bulletin  
Replacing HPR 122i woofers  
Title:  
Bulletin #:  
HPR0002  
Issue Date:  
May 7, 2007  
Models Affected: HPR 122i  
Bulletin Revision: Rev. C  
Production Range: March 2007 and earlier (see serial number date code guide  
below)  
Table 1. HPR 122i serial  
number date code  
Description  
In some HPR 122i powered loudspeakers manufactured prior to April 2007 (see Table 1; this bulletin  
applies to date codes I6 through C7, with the exceptions of GB7330741 through GB7330980, and  
GC733001 or later), the woofer voice coil has seized due to part of the magnet structure’s having  
shifted position.  
G X X 33xxxx  
Month Year  
NOTE: This type of failure is likely to affect only original drivers in some but not all HPR 122i units  
made during this time span. For those that do fail in this way, there is no singular cause, and the  
failures may occur at once or over some time. This condition is not repairable through reconing;  
instead, the entire driver must be replaced. QSC  
A = Jan 6 = 2006  
B = Feb 7 = 2007  
C = Mar  
D = Apr  
E = May  
F = Jun  
G = Jul  
H = Aug  
QSC recognizes that HPR users may need fast service, so we will ship a replacement driver overnight,  
free of charge, to any HPR owner in the US who has experienced this failure. (HPR owners outside the  
US must contact their QSC distributor.) The driver part number is SP-000107-GP; to order, contact QSC  
Technical Services (see the contact information on page 2).  
I = Sep  
Replacing the driver requires only a Philips screwdriver and a 4 mm or 5/32” Allen wrench.  
J = Oct  
K = Nov  
L = Dec  
Instructions  
Tools and materials required  
• Philips (cross) screwdriver  
• 4 mm or 5/32” hex (Allen) wrench or bit  
• 12” replacement driver (QSC part # SP-000107-GP)  
• Gasket (closed-cell adhesive foam weatherstrip, approx. 3 mm or 1/8 in  
wide × approx. 1 m or 39 in long; included with replacement driver)  
Procedure  
1. Disconnect the loudspeaker’s power cord from the AC outlet.  
2. Remove the front grille. There are 16 Philips-head screws that secure it  
to the enclosure. Set the grille and screws aside.  
3. Remove the four hex socket-head mounting screws around the  
circumference of the woofer driver. Support the driver while you loosen  
and remove the screws. Each screw has a small lockwasher; be careful  
to not lose it. Set the screws and their lockwashers aside.  
4. Carefully lift the driver from the enclosure. There will be two wires  
attached to the driver, so be careful to not strain them.  
5. Disconnect the wires from the driver terminals and completely remove  
the driver. Note that the orange wire connects to the + terminal, and  
the blue wire to the - one. The new driver will connect the same way.  
6. On the new woofer driver, apply the gasket strip to the mounting flange  
(Figure 1). Do not cover the mounting holes. Overlap the ends slightly  
and cut off any excess. Connect the two wires to their respective  
terminals.  
Figure 1. The orange wire connects to the +  
terminal, and the blue wire to the - terminal.  
Continued on next page  
HPR0002 rev. C  
1
 

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