YORKVILLE NX720S Service Manual
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YORKVILLE NX720S Service Manual

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SERVICE MANUAL
MODEL TYPE: YS1055
NX720S
WEB ACCESS: http://www.yorkville.com
WORLD HEADQUARTERS
CANADA
U.S.A.
Yorkville Sound
Yorkville Sound Inc.
550 Granite Court
4625 Witmer Industrial Estate
Pickering, Ontario
Niagara Falls, New York
L1W-3Y8 CANADA
14305 USA
Voice: (905) 837-8481
Voice: (716) 297-2920
Fax: (905) 837-8746
Fax: (716) 297-3689
Quality and Innovation Since 1963
Printed in Canada
Manual-Service-nx720s-00-1v4 • Jan 19, 2016

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Summary of Contents for YORKVILLE NX720S

  • Page 1 550 Granite Court 4625 Witmer Industrial Estate Pickering, Ontario Niagara Falls, New York L1W-3Y8 CANADA 14305 USA Voice: (905) 837-8481 Voice: (716) 297-2920 Fax: (905) 837-8746 Fax: (716) 297-3689 Quality and Innovation Since 1963 Printed in Canada Manual-Service-nx720s-00-1v4 • Jan 19, 2016...

  • Page 2: Important Safety Instructions

    IM PORTA N T S A F E T Y IN ST RUC TI ON S This lightning flash with arrowhead symbol, within The exclamation point within an equilatereal triangle is intended to alert the an equilateral triangle, is intended to alert the user to the presence of user to the presence of important operating and maintenance (servicing) uninsulated “dangerous voltage”...
  • Page 3 ALL CONNECTIONS FUNCTION AS INPUTS OR OUTPUTS IN ALL CONFIGURATIONS, THE NX720S WHEN USING A SINGLE NX720S WITH A STEREO SYSTEM CAN BE CONNECTED BEFORE OR AFTER USE INPUT A AND INPUT B TO BLEND SIGNALS AND THE FULL-RANGE ENCLOSURE...
  • Page 4 NX720S Parts List 1/19/2016 YS # Description Qty. YS # Description Qty. YS # Description ZC1258 M1485 SPACER BAR MADE IN CHINA 4984 W250 150R 5%MINI T&R RES 5200 _10P 200V 5%CAP T&R RAD CER.2NPO 4977 W250 220R 5%MINI T&R RES 5408 _47P 100V 10%CAP T&R BEAD...
  • Page 5 M1330 Parts Reference List 1/18/2016 YS # Description YS # Description YS # Description YS # Description YS # Description YS # Description R129 5201 470P 100V 5%CAP T&R RAD CER.2NPO 5208 __2N2 400V 5%CAP T&R RAD .2FLM 6825 1N4148 75V 0A45 DIODE T&R 4982...

  • Page 6: Specifications

    Specifications Powered Subwoofer System Type Active Active or Passive Program Power (Watts) Max SPL (dB) Frequency Response (Hz +/- 3db) 40-150 90-150 (adjustable) Crossover Frequency (Hz) 15 inch / 3 inch voice coil Driver Configuration 15 inch Neodymium Magnet Cast frame LF Driver(s) LF Program Power(Watts) LF Protection...
  • Page 7 GND AT TRANSISTORS troubleshooting of Level Shift, drivers OUTPUT OUTPUT and output devices INPUT FILTER INTEGRATED DIFF AMP ERROR AMP U9. Q8, U10 GATE DRIVE LEVEL SHIFT -120 RAMP GENERATOR SILENT ON/OFF VIA Q19 WOOFER BLOCK-DIAG-NX720S-00-1v0.ai...

  • Page 8: Power Supply

    R167 -36 dB/OCT HP 18uH 4100 3899 TL072 R168 R158 U24:B LEVEL 265V R161 LEVEL 1/4W 1/4W 249R 470R 6543 P5:A 10K THRU B FLMP TL072 2339 P5:B 10K R116 2339 U23:A +15VIP 150N 100V 4148 MINI R199 100P IGND INPUT B 50HZ BOOST +3dB R162...
  • Page 9 VER# DESCRIPTION OF CHANGE R210 1/4W +22V MARCH 2010 1.00 MADE FROM NX720S M1330 V1.00 IN MARCH 2010 FORCE UPDATED PARTS FROM TONY'S LIST APRIL 2010. FUSIBLE JUNE 2010 2.00 6 RESISTOR CHANGES AND A FEW BOARD MOD'S R258 R211...
  • Page 10 5887 6408 4007 620K R129 100N 100N 5862 2.0W R123 C105 3300U 180V R140 TL072 2.0W 6882 LM13600N 4007 R114 Yorkville D.N.S. R143 2014 6K19 4007 C134 18V0 X8018 LS701P/LS720P MPSA92 4056 R139 4148 18uH 100N 10R0 100N R170 100N...
  • Page 11 SEE LAYOUT DIAGRAM 1330 PRODUCTION NOTES 1. ATTACH ALL 4 NUT SCREW AND WASHERS FOR THE TRANSISTOR SPRING WITH THE NUT ON THE TOP. 2. MAKE SURE TO RTV ALL LARGE CAPACITORS TO SOMETHING CLOSE J109 BC550C BC560C 2N5638 **************IMPORTANT****************** 3.
  • Page 12 LS720P DATE VER# DESCRIPTION OF CHANGE MARCH 2010 1.00 MADE FROM NX720S M1330 V1.00 IN MARCH 2010 FORCE UPDATED PARTS TONY'S LIST APRIL 2010. JUNE 2010 2.00 6 RESISTOR CHANGES AND A FEW BOARD MOD'S FOR PRODUCTION REQUESTS ADD #2327, #4146, #4151...
  • Page 13 Part# Description Labeled Components 7471 15" 8R 1000WPRGM 3"V.C. NEO SPE Z905* NX720S GRILL 8240D LOGO YORKVILLE SMALL BLUE ADAPTOR,SPEAKER STAND,METAL,BLA 8483 8565 BAR HANDLE ALL METAL RECTANGULA 8545 RECESSED RUBBER BUMPER WITH WAS 9916 KNOB 0-DEG GRY SOFT GRAY...
  • Page 14 NX720S Parts List 6/22/2010 Description Qty. YS # Description Qty. YS # Description Qty. 5906 RED 3MM LED 1V9 20MA.4SPCER T&R 8565 BAR HANDLE ALL METAL RECTANGULAR 4956 1/4W 27K 5% .2"U T&R RES 5907 YEL 3MM LED 1V9 20MA.4SPCER T&R...

  • Page 15: Input Select

    P OWE R LI M I T C L I P NX720S LEVEL BOOST ROLLOFF FREQUENCY INPUT SELECT LINE SPKR INP U T A I NP U T A IN PUT B TH RU A T H RU A T HRU B...
  • Page 16 100N GROUND 250V 18V0 1300UH 4148 C112 XFMR BLK R103 R138 GRN/YEL TL072 AC WHT M1330 PSGND NE5532N R165 R146 NX720S 9K76 9K76 R135 113K 220N 1.0W 1.0W 2/2 V02 R118 220N 9K76 R159 9K76 4148 1.0W BAR DOWN MR752...
  • Page 17 CH1337E 230V Function Function Function TO220 TO220 T221D Function Function NX720S CE...

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