QSC HPR 122i Service Bulletin
1
HPR0002 rev. C
Title:
Replacing HPR 122i woofers
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)
Service Bulletin
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.
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
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).
Replacing the driver requires only a Philips screwdriver and a 4 mm or 5/32” Allen wrench.
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.
Continued on next page
➜
G
X X
33xxxx
Month Year
A = Jan
B = Feb
C = Mar
D = Apr
E = May
F = Jun
G = Jul
H = Aug
I = Sep
J = Oct
K = Nov
L = Dec
6 = 2006
7 = 2007
Figure 1. The orange wire connects to the
+
terminal, and the blue wire to the
-
terminal.
Table 1. HPR 122i serial
number date code