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Exactly what was needed to assess the product - excellent value and great service
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A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
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Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
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Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
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some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
Technical Manual
QLS-3
Quantum Line Source Series 4-Way Speaker
SPECIFICATIONS
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
Nominal Impedance: 4 ohms Power Rating: 60 to 250 watts RMS Crossover Frequencies: 200Hz, 600Hz, 4kHz Frequency Response: 28Hz-32kHz +/-3dB NOTE: Woofer has dual voice coils, solid red wire is 4 ohm pos., solid black wire is 2 ohm pos.
PHYSICAL SPECIFICATIONS:
2x - EMIT Tweeters 1x - 1-1/2" (3.8cm) Dome Midrange 1x - 4" (10.2cm) Midbass Coupler, transmission line loaded 1x - 12" (30.5cm) Infinity/Watkin Dual-Drive Woofer Dimensions: 40"H x 18"W" x 13"D XXXXXXXXXXXX XXXXXXXXX102cm(H) x 45.7cm(W) x 33cm(D) Cabinet Not Sold Grille NLA Control Tweeter Control Midrange Crossover Logo #145-0110 #145-0110 NLA #716-0312
PRODUCTION HISTORY
Introduced in 1977 Discontinued 1982 Original Retail Price: $1,050.00/pair
TECHNICAL INFORMATION
(3x) TWEETER NLA Substitue NLA DIAPHRAGM #751-0625 TWEETER (Rear) #902-0157 DIAPHRAGM NLA
(2x) DOME MIDRANGE #902-0206 MID DIAPHRAGM NLA
MIDBASS COUPLER #902-0151
12" WOOFER #902-1180 Substitute NONE
BINDING POST
FUSE
5� 25W
3.16µF (.33+.33+2.2)
BLUE/BLK BLUE
TWEETERS
WHITE
INPUTS
2 Amp AGC
10.3µF (3.5 + 6.8)
0.3mH
5� 25W
WHITE/BLK
MIDRANGE
5.4� 5� 25W 4.0mH 4.3mH 40µF
YELLOW/BLK YELLOW RED RED/BLACK BLACK
MID BASS COUPLER
600µF
WOOFER V. C. 1
20mH
600µF
RED/BLACK
WOOFER V. C. 2
REV B 3/2003
INFINITY SYSTEMS INC., 250 Crossways Park Drive, Woodbury, New York 11797
QLS-3 Quantum Line Source Series 4-Way Speaker
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