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The manual was of good quality with high resolution schematic diagrams.
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The manual was very clear and contained all the information I was looking for. My dishwasher is working again because of this servicemanual!
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Quality scan, great manual. I solved my problem with this manual.
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The AKAI 1720 model reel to reel tape recorder described in this Manual is quite an old unit - circa late 1960's. As a consequence, the description of the mechanical details - and adjustments thereof - is quite critical. The manual does this quite well. The schematics are also well presented and have detailed PCB overlays. Probably the only negative is that some half-tone detail has been lost from the original manual as it has been scanned in simple B&W.
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Perfect source for service manuals: fast and professional transaction; high quality, perfect readable and largely scaleable PDF; complete schemes, diagrams and spare part list. Tnx a lot, cu again!!!!
Technical Manual
REFERENCE 40
SPECIFICATIONS
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
Nominal Impedance: Power Rating: Efficiency: Crossover Frequencie: Frequency Response: 6 ohms 25-125 watts 90 dB @ 2.8 volt/1 meter 400Hz, 3,500Hz 46Hz-25kHz +/-2.5dB
Reference Series 3-Way Speaker System
PHYSICAL SPECIFICATIONS:
1x - 1" (2.5cm) Polycell Tweeter 1x - 5" (12.7cm) IMG Midrange 1x - 9" (20.3cm) IMG Woofer XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Dimensions: 21.6"H x 10.5"W" x 9.85"D XXXXXXXXXXX XXXXXXXXX54.92cm(H) x 26.67cm(W) x 25.08cm(D) Cabinet Not Sold Grille #A026-4576 Crossover #A015-5082 Logo #716-5020 Spike Feet #846-4297
PRODUCTION HISTORY
Introduced in 1991 Discontinued 1993 Original Retail Price: $600.00/pair
TECHNICAL INFORMATION
POLYCELL
TWEETER #902-4606 DIAPHRAGM #751-5099
MIDRANGE #902-6770 NLA
USE 902-4585
6" WOOFER #902-4592 NLA
USE 902-7298
23" BLU/BLK .110" FEMALE CLIP
INPUTS
C1 2.5µF POLY
L1 0.60mH
R1 7.0� 5W
TWEETER
23" BLUE .205" FEMALE CLIP 22" WHT/BLK .110" FEMALE CLIP
C2 40.0µF NPE
L2 .80mH
L3 2.50mH
C3 10.0µF NPE
R2 2.5� 10W
MIDRANGE
22" WHITE .205" FEMALE CLIP 15" RED .250" FEMALE CLIP
L4 3.00mH C4 150µF NPE
WOOFER
15" RED/BLK .205" FEMALE CLIP
REV B 5/2003
INFINITY SYSTEMS INC., 250 Crossways Park Drive, Woodbury, New York 11797
REFERENCE 40 Reference Series 3-Way Speaker System
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