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U.S.A. 

Yorkville Sound Inc. 

4625 Witmer Industrial Estate 

Niagara Falls, New York 

14305 USA 

Voice: (716) 297-2920 

Fax: (716) 297-3689 

WORLD HEADQUARTERS 

WEB ACCESS: http://www.yorkville.com 

CANADA 

Yorkville Sound 

550 Granite Court 
Pickering, Ontario 

L1W-3Y8 CANADA 

Voice: (905) 837-8481 

Fax: (905) 837-8746 

Quality and Innovation Since 1963

Printed in Canada 

SERVICE MANUAL

NX720S

MODEL TYPE: YS1055

Manual-Service-nx720s-00-1v1.pdf

Summary of Contents for YS1055

Page 1: ...0 Fax 716 297 3689 WORLD HEADQUARTERS WEB ACCESS http www yorkville com CANADA Yorkville Sound 550 Granite Court Pickering Ontario L1W 3Y8 CANADA Voice 905 837 8481 Fax 905 837 8746 Quality and Innova...

Page 2: ...cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped AVIS AFIN DE...

Page 3: ...B ROUND PUSHBUTTON 1 4 GREY 11 3925 XLR FEML PCB MT VERT 24MM U CO 12 3453 XLR MALE PCB MT VERT 13 3921 1 4 JCK PCB MT VERT STER RT SW 14 3585 DPDT ROKR SW QUIK 250 AC PWR I 15 2398 4 0 AMP CIRCUIT BR...

Page 4: ...HP LIMITER LED RMS LIMITER POWER SUPPLY CLASS D AMPLIFIER WOOFER CLASS D AMPLIFIER WOOFER BLOCK DIAGRAM LOCATED BELOW NOTE Shorting R47 will eliminate feedback and audio signal allowing troubleshooti...

Page 5: ...WOOD SCRW JS500 4 5199 100P 100V 2 CAP T R RAD CER 2NPO 2 4813 1 4W 6R2 5 T R RES 2 4143 NYLON SPACER L 312 1D 171 OD 375 17 5408 _47P 100V 10 CAP T R BEAD NPO 1 2010 1 6W 10R0 2 FLAME PROOF T R RES 4...

Page 6: ...PSA06 MPSA13 2N5401 8 V 4 V U12 C U12 A TL072 U12 B TL072 R4 1 4W 0 1 17K40 8 V 4 V U19 C U19 A TL072 PSGND R133 1 4W 22K MINI R119 1 4W MINI 6K8 M B P4 A 4432 10K Bass Boost Q21 5105 TO92 MPSA13 15VI...

Page 7: ...OUT U9 D 74HC14N 6603 100V C1 470P 1 4W 1K5 R74 FUSIBLE 1 4W 3K3 R151 MINI 1 4W 3K3 R150 MINI R80 1 4W 0 1 4K12 1 4W 4K7 R49 MINI 1 4W 10K0 R258 MINI 100V C45 470P R81 1 4W 37K4 R77 1 4W 37K4 100V C3...

Page 8: ...LM311 2N5401 MC78L05ABPRM MC33079P 100N 22K LM13600N 22K 82N 220K 22K 100N 2N5551 TL072 4148 68K 17K40 4148 1K5 150N 4148 2K 6K8 B 10K 1M 1K 1K2 9K76 NE5532N MPSA06 2N5401 B 10K 9K76 1 0W 100N IRFP23...

Page 9: ...JE340 MJE270 BD238 BD140 BD139 MJE271 BD237 C E B TO 92 BC560C BC550C FUNCTION KNOB REF MODEL S PART NEW N N N N N N N K K K K K K K P P P P P P P F F F F F F F R R R R R R R P1 4434 MAIN GAIN GREEN P...

Page 10: ...00N IRFP23N50L 14K0 4148 2 0W 2R 63V 4U7 100N 100N 63V 2U2 1U 63V 4007 MPSA92 4007 4007 50V 2200U 113K 250V 4N7 12K 5 0W 12K 5 0W 12K 5 0W 10V0 288UH 100K TL072 MPSA13 B 10K 3U3 140V 4N7 0R047 5 0W 12...

Page 11: ...FREQUENCY NX720S LEVEL dB 6 00 0 INPUT A THRU A INPUT B THRU B INPUT SELECT P A R A L L E L P A R A L L E L A Z552 1v1 PR02 INPUT A THRU A YS 9917 Green Knob qty 1 YS 9916 Gray Knob qty 1 YS 9918 Blu...

Page 12: ...7 50V 2200U 4007 4007 4007 10V0 3U3 340V 3U3 140V 4N7 IRFP23N50L 0R047 5 0W 12K 5 0W 3U3 140V MR752 250V 4N7 3300U 180V 50V 2200U 3300U 180V 1300UH MR752 3U3 140V 2 2 V1 00 CHASSIS GROUND R72 R50 R29...

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