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Yamaha NS-P270 Service Manual

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HOME CINEMA 5.1CH SPEAKER PACKAGE/
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NS-P270/NS-P276
NS-P270/NS-P276 consists of the NX-E270, NX-C270 and the SW-P270
This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already
known and understood by the users, and have therefore not been restated.
WARNING:
IMPORTANT:
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service
departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and
specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the
distributor's Service Division.
WARNING:
IMPORTANT:
1 0 1 0 0 0
IMPORTANT NOTICE
Failure to follow appropriate service and safety procedures when servicing this product may result in personal
injury, destruction of expensive components, and failure of the product to perform as specified. For these reasons,
we advise all YAMAHA product owners that any service required should be performed by an authorized YAMAHA
Retailer or the appointed service representative.
The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or
recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.
Static discharges can destroy expensive components. Discharge any static electricity your body may have
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).
Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.
© 2006
All rights reserved.
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
SERVICE MANUAL
SERVICE MANUAL
I
CONTENTS
TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . . 2
FRONT PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
SW-P270 INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . 6
SW-P270 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . 8
SW-P270 PRINTED CIRCUIT BOARD . . . . . . . . . . . . 9
SW-P270 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . 10
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . 11-15
'06. 01

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  Summary of Contents for Yamaha NS-P270

  • Page 1: Table Of Contents

    This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users, and have therefore not been restated.
  • Page 2: To Service Personnel

    If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. I FRONT PANELS M SW-P270 M NX-C270 M NX-E270 x4 for (NS-P270) x5 for (NS-P276)
  • Page 3: Rear Panels

    NS-P270/NS-P276 I REAR PANELS M SW-P270 (U, C models) M SW-P270 (R model) M SW-P270 (T model) POWER INDICATOR POWER INDICATOR POWER INDICATOR M SW-P270 (K model) M SW-P270 (A model) M SW-P270 (B, G models) POWER INDICATOR POWER INDICATOR...
  • Page 4 NS-P270/NS-P276 M SW-P270 (L model) M NX-C270 M NX-E270 POWER INDICATOR I SPECIFICATIONS G NX-E270 G NX-C270 Type ........2-way acoustic suspension Type ........Full-range acoustic suspension Magnetic shielding type Magnetic shielding type Driver Driver ............ 5 cm (2”) cone x 2 Woofer ........
  • Page 5: Specifications

    G SW-P270 G Accessories Type ....Advanced Yamaha Active Servo Technology NS-P270 ........Subwoofer cable (3m) x 1 Magnetic shielding type Nonskid pad x 4 (for SW-P270) Output Power .... 50 W (100 Hz, 5 ohms , 10 % THD) Speaker cable (10 m) x 2 Dynamic Power ..........
  • Page 6: Sw-P270 Internal View

    NS-P270/NS-P276 M SW-P270 335 (13-3/16”) 200 (7-7/8”) 370 (14-9/16”) Unit : mm (inch) I SW-P270 INTERNAL VIEW MAIN (2) P.C.B. MAIN (1) P.C.B. MAIN (3) P.C.B. POWER TRANSFORMER...
  • Page 7: Sw-P270 Disassembly Procedures

    NS-P270/NS-P276 I SW-P270 DISASSEMBLY PROCEDURES (Remove parts in disassembly order as numbered.) Disconnect the power cable from the AC outlet. 1. Removal of Front Grille Ass’y The Front Grille Ass’y is fixed to the cabinet with dowels at 6 locations. As a flatblade screwdriver is used for removal, use special care not to cause damage to the cabinet Ass’y.
  • Page 8: Sw-P270 Block Diagram

    NS-P270/NS-P276 I SW-P270 BLOCK DIAGRAM VOLUME INPUT POWER IC1B DRIVER IC7A IC7B – –B L.P.F. L.P.F. H.P.F. 6dB/oct 12dB/oct 12dB/oct A.N.I.C D14, 15, 16 LIMITER Q3, 4, 5, 8 D9, 10, 11, 12 Q10, 11, 12, 13 PROTECTION Q1, D6 POWER –12...
  • Page 9: Sw-P270 Printed Circuit Board

    NS-P270/NS-P276 SW-P270 PRINTED CIRCUIT BOARD P. C. B. MAIN (1) DRIVER R, T, K, L models U, C, A, B, G models 110–120V 220–240V R, T, K, L models P. C. B. MAIN (2) POWER INDICATOR P. C. B. MAIN (3)
  • Page 10: Sw-P270 Schematic Diagram

    NS-P270/NS-P276 SW-P270 SCHEMATIC DIAGRAM IC1, 2, 7 : KIA4558P IC4 : STK404-050 MAIN (1) Dual OP-Amp Power Amp 11.7 11.7 –IN – – –IN –V -11.0 -11.0 11.7 32.9 VOLUME INPUT -33.0 -1.1 DRIVER -32.0 11.7 -1.0 -11.6 POWER INDICATOR MAIN (2) -1.5...
  • Page 11: Replacement Parts List

    NS-P270/NS-P276 I REPLACEMENT PARTS LIST G ELECTRICAL REPLACEMENT PARTS LIST WARNING Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS : C.A.EL.CHP : CHIP ALUMI.
  • Page 12 NS-P270/NS-P276 SW-P270 P.C.B. MAIN Ref. Part No. Description Remarks Markets AAX76120 P.C.B. MAIN 435321 AAX76130 P.C.B. MAIN 435322 AAX76640 P.C.B. MAIN 438372 AAX76140 P.C.B. MAIN 435323 AAX76630 P.C.B. MAIN 438371 AAX32010 CN B05B-PH-K-S 081702 CB4-5 WC050700 CLIP.FUSE EYF-52BCY 404188 CB6-7 WC050700 CLIP.FUSE...
  • Page 13 NS-P270/NS-P276 SW-P270 P.C.B. MAIN Ref. Part No. Description Remarks Markets AAX33350 FUSE 500mA 250V 357454 IC1-2 AAX41390 IC KIA4558P 353033 AAX13490 IC STK404-050 AF 058246 AAX41390 IC KIA4558P 353033 WC871000 JACK 1P MSP-241V-01N 396638 AAX51690 TR KTC2026 Y,GR 362783 AAX51680 TR...
  • Page 14 G EXPLODED VIEW SW 1 R, T, K, L models NX-E270 and NX-C270 requires replacement as a unit. Individual replacement parts will not be supplied. (4 m x 3) (10 m x 2) (10 m x 3) 203 NS-P270 204 NS-P276...
  • Page 15: Replacement Parts List

    NS-P270/NS-P276 G REPLACEMENT PARTS LIST Ref. Ref. Part No. Description Remarks Markets Part No. Description Remarks Markets AAX76160 CABINET ASS'Y 433255 ACCESSORIES AAX76150 CABINET ASS'Y 433254 * 201 AAX76200 SUBWOOFER CABLE 1P 3m 1pc 378100 X4329B00 DRIVER WOOFER 16cm 6Ω...
  • Page 16 NS-P270/NS-P276 MEMO NS-P270/NS-P276...

This manual is also suitable for:

Ns-p276