5
TD-000487-00
K Series Service Manual
1. Introduction
1.1 Restriction of Hazardous Substances Directive (RoHS)
QSC K Series loudspeaker products are manufactured to conform to the European Union’s RoHS Directive, which reduces
the amount of hazardous substances allowed in products for sale within its member nations. In electronic equipment such
as audio processors, this applies primarily to certain toxic heavy metals, such as lead, which may be present in electronic
components, solder, and other parts.
RoHS-compliant materials
When servicing RoHS-compliant electronic products, it is important for the service technician to use only RoHS-compliant
components and solder (lead-free). All replacement parts provided by QSC for RoHS-compliant products are certified as
RoHS compliant.
RoHS-compliant tools
Soldering irons and desoldering apparatus used on RoHS-compliant products must also not be contaminated by hazardous
substances, such as lead. Therefore, you cannot use the same soldering and desoldering tools for RoHS-compliant products
and solder as you do for non-compliant products and solder. You must either use separate soldering irons, desoldering tools
and braid, etc., or at the very least designate separate tips and braids and use only the appropriate ones. If you contami-
nate a tip or braid, even inadvertently, by using it on a non-compliant product or solder, you should no longer use it with
RoHS-compliant products or solder.
1.2 Revision history
No revision history yet.
1.3 Service bulletins
At the publish date of this service manual,
two
service bulletins concerning the K Series loudspeakers have been issued.
Check www.qscservice.com or contact QSC Technical Services Group (TSG) for the latest information on applicable service
documents. For a quick summary, refer to “10. Service updates” on page 41.
1.4 Serial Numbers
Serial numbers on QSC K Series loudspeakers are nine digits long. The second digit represents
the month of manufacture, and the third digit represents the year; use the decoder chart on the
right to find the manufacture date. (The first digit is an individual factory code, and the fourth
through ninth digits are the sequential identifying number for each individual speaker.) For
example, a serial number of G
JC
xxxxxx would indicate that the speaker was built on 10/12, or
October 2012.
The speaker’s serial number can be found on a label on the amplifier module’s face plate.
MODEL:
KW122,BLK
100–240 V 2.3–1.1 A 50/60HZ
QSC AUDIO PRODUCTS, LLC
COSTA MESA, CA. USA
MADE IN CHINA
GJC669897
Year
Month
G
X X
5xxxxx
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
9 = 2009
A = 2010
B = 2011
C = 2012
D = 2013
E = 2014
F = 2015
G = 2016
Summary of Contents for K8
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