NS-P24 HOME THEATER SOUND SPEAKER SYSTEM NS-P24/ SERVICE MANUAL NS-P24/ is composed of NX-S12, NX-C12 and SW-P24. IMPORTANT NOTICE This manual has bee

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2 NS-P24 HOME THEATER SOUND SPEAKER SYSTEM NS-P24/ SERVICE MANUAL NS-P24/ is composed of NX-S12, NX-C12 and SW-P24. IMPORTANT NOTICE 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: 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. IMPORTANT: 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. 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: 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). IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit. CONTENTS TO SERVICE PERSONNEL FRONT PANELS REAR PANELS SPECIFICATIONS / 4 6 SW-P24 INTERNAL VIEW SW-P24 DISASSEMBLY PROCEDURES / 7 SW-P24 BLOCK DIAGRAM SW-P24 PRINTED CIRCUIT BOARD SW-P24 SCHEMATIC DIAGRAM PARTS LIST

3 NS-P24/ TO SERVICE PERSONNEL 1. Critical Components Information Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT 2. Leakage Current Measurement (For 12V Models Only) When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from supply circuits. INSULATING TABLE Meter impedance should be equivalent to 15 ohm shunted by.15µf. Leakage current must not exceed.5ma. Be sure to test for leakage with the AC plug in both polarities. WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSOEVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. FRONT PANELS SW-P24 NX-C12 NX-S12 x 4 (for NS-P24) x 5 (for ) NS-P24 2

4 NS-P24 NS-P24/ REAR PANELS SW-P24 (U, C models) SW-P24 (R, L models) SW-P24 (T model) SW-P24 (K model) SW-P24 (A model) SW-P24 (B, G models) KTL SU919-3

5 IMPEDANCE 6 OHMS NOMINAL INPUT 3 WATTS MAXIMUM INPUT 1 WATTS IMPEDANCE 6 OHMS NOMINAL INPUT 3 WATTS MAXIMUM INPUT 1 WATTS NS-P24/ SW-P24 (J model) NX-S12 NX-S12 NX-C12 NX-C12 SPECIFICATIONS NX-S12 Type / Full Range Acoustic Suspension Magnetic Shielding Type Driver /. 5 cm (2 ) Cone Magnetic Shielding Type x 2 Frequency Response / 1 Hz to 25 khz Impedance / ohms Nominal Input / 3 W Maximum Input / 1 W Sensitivity / db/2.83 V/m Input Terminal / Push Type Dimensions (W x H x D) / mm x 17 mm x 18 mm (2-13/16 x 6-11/16 x 4-1/4 ) Weight / kg (2 lbs.) Finish / Silver color Black color NX-C12 Type / Full Range Acoustic Suspension Magnetic Shielding Type Driver /. 5 cm (2 ) Cone Magnetic Shielding Type x 2 Frequency Response / 1 Hz to 25 khz Impedance / ohms Nominal Input / 3 W Maximum Input / 1 W Sensitivity / db/2.83 V/m Input Terminal / Push Type Dimensions (W x H x D) / mm x 72 mm x 15 mm (11-13/16 x 2-13/16 x 4-1/8 ) Weight / kg (2 lbs. 6 oz.) Finish / Silver color Black color NS-P24 4 Appropriate Speaker Stand /... SPS-8 Appropriate Speaker Bracket /... SPM-8S

6 NS-P24 NS-P24/ SW-P24 Type /..... Advanced Yamaha Active Servo Technology Output Power / 5 W (1 Hz, 5 ohms, 1 % THD) Dynamic Power / 1 W, 5 ohms Input Impedance / INPUT (PJ) k-ohms Frequency Response / 3 Hz to 2 Hz Driver / 16 cm (6-1/2 ) cone Magnetic Shielding Type Input Section / INPUT RCA Pin Jack Power Supply / U, C models AC 12 V, 6 Hz R, T, K, L models.. AC 11-12/22-24 V, 5/6 Hz A model AC 24 V, 5 Hz B, G models AC 23 V, 5 Hz J model AC 1 V, 5/6 Hz Power Consumption / U, C, A, B, G, R, T, K, L models W J model W Dimensions (W x H x D) / mm x 365 mm x 39 mm (7-7/8 x 14-7/2 x 15-5/16 ) Weight / kg (18 lbs. 8 oz.) Finish / Silver color U, C, R, T, K, A, B, G, L, J models Black color U, C, R, A, G models Accessories / NS-P Subwoofer Cable (5m) x 1 Nonskid Pad x 4 (for subwoofer) Speaker Cable (15 m) x 2 Speaker Cable (4 m) x 3 Nonskid Pads x 16 Mounting Bracket x 4, Screws x 4 Fasteners x Subwoofer Cable (5m) x 1 Nonskid Pad x 4 (for subwoofer) Speaker Cable (15 m) x 3 Speaker Cable (4 m) x 3 Nonskid Pads x 2 Mounting Bracket x 5, Screws x 5 Fasteners x 2 * Specifications subject to change without notice. U... USA model C... Canadian model R... General model T... Chinese model K... Korean model A... Australian model B... British model G... European model L... Singapore model J... Japanese model 5

7 NS-P24/ DIMENSIONS SW-P24 17 (6-11/16") 72 (2-13/16") 365 (14-3/8") 2 (7-7/8") 39 (15-5/16") NX-S12 NX-C12 3 (11-13/16") 15 (4-1/8") 72 (2-13/16") 18 (4-1/4") Unit : mm (inch) SW-P24 INTERNAL VIEW q w q MAIN (2) P.C.B. w MAIN (1) P.C.B. e MAIN (3) P.C.B. r POWER TRANSFORMER NS-P24 6 e r

8 NS-P24 NS-P24/ SW-P24 DISASSEMBLY PROCEDURES (Remove parts in disassembly order as numbered.) 1. Removal of Front Grille The Front Grille is fixed to the cabinet with dowels at 6 locations. As a screwdriver (for slotted head screw) is used for removal, use special care not to cause damage to the cabinet. a. Using the screwdriver inserted in the gap between the Front Grille and the cabinet (bottom side first), push up the Front Grille. b. Remove the Front Grille by lifting it up. * When installing the Front Grille, apply quick-drying bond to the dowels and then fit them into dowel holes for secure installation. (The Front Grille will come off easily if its dowels are fitted into dowel holes only.) 2. Removal of Rear Panel Remove 14 screws ( q ) in Fig. 2. * Arrow marks ( ) are printed to identify the screws to be removed. * When assembling the Rear Panel, check to ensure that the packing is not damaged so as to prevent air leakage from occurring. q q Fig. 1 Fig. 2 7

9 NS-P24/ SW-P24 BLOCK DIAGRAM INPUT 6 5 IC1B L.P.F. 6dB/oct VR1 VOLUME 7 5 IC7A L.P.F. 12dB/oct 7 POWER AMP IC7B 3 +B IC H.P.F. B 12dB/oct A.N.I.C IC2 Q9 D14, 15, 16 RY1 SPEAKER.1 LIMITER Q3, 4, 5, 8 D9, 1, 11, 12 IC3 +B PROTECTION Q1, D6 REGULATOR Q2, D7 POWER SUPPLY D3 F2 POWER SW2 B NS-P24 8

10 A B C D E F G H NS-P24/ 1 SW-P24 PRINTED CIRCUIT BOARD P.C.B. MAIN (1) SW-P24 SW1 (R,T,K,L) WH RE SPEAKER AC22~24V AC11~22V 2 R, T, K, L models U, C, A, B, G, J models BE WH 3 P.C.B. MAIN (3) P.C.B. MAIN (2) 4 BE WH POWER VOLUME 5 POWER CABLE INPUT 6 9

11 A B C D E F G H NS-P24/ 1 SW-P24 SCHEMATIC DIAGRAM MAIN (1) POWER AMP KA LIMITTER K SLR-56MG PROTECTION MAIN (2) 3 IC1, 2, 7 : KIA4558P Dual OP-Amp OUT1 1 IN IN VCC 7 OUT2 6 IN2 VCC 4 5 +IN IC3 : TA7317P Protector IC4 : STK44-5 Power Amp AC TR7 Power supply Muting circuit Constant voltage power supply circuit R1 R4 TR6 AC ON/OFF detecting circuit Overcurrent detecting circuit OR circuit Schmidt circuit Relay drive circuit 6 TR1 C1 TR2 R5 C2 TR8 R2 TR Current voltage detecting circuit Discharging circuit 7 4 GND Substrate 5 TR3 D1 R3 R6 TR4 SUB MAIN (3) POWER SW2 SY (U99S2)/T * All voltages are measured with a 1MΩ/V DC electronic volt meter. * Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. * Schematic diagram is subject to change without notice. Z 6 1

12 NS-P24 NS-P24/ PARTS LIST ELECTRICAL PARTS WARNING Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. Z ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS : C.A.EL.CHP C.CE C.CE.ARRAY C.CE.CHP C.CE.ML C.CE.M.CHP C.CE.SAFTY C.CE.TUBLR C.CE.SMI C.EL C.MICA C.ML.FLM C.MP C.MYLAR C.MYLAR.ML C.PAPER C.PLS C.POL C.POLY C.PP C.TNTL C.TNTL.CHP C.TRIM CN CN.BS.PIN CN.CANNON CN.DIN CN.FLAT CN.POST COIL.MX.AM COIL.AT.FM COIL.DT.FM COIL.MX.FM COIL.OUTPT DIOD.ARRAY DIODE.BRG DIODE.CHP DIODE.SHOT DIODE.VAR DIOD.Z.CHP DIODE.ZENR DSCR.CE FER.BEAD FER.CORE FET.CHP FL.DSPLY FLTR.CE FLTR.COMB FLTR.LC.RF GND.MTL GND.TERM HOLDER.FUS IC.PRTCT JUMPER.CN JUMPER.TST : CHIP ALUMI. ELECTROLYTIC CAP : CERAMIC CAP : CERAMIC CAP ARRAY : CHIP CERAMIC CAP : MULTILAYER CERAMIC CAP : CHIP MULTILAYER CERAMIC CAP : RECOGNIZED CERAMIC CAP : CERAMIC TUBULAR CAP : SEMI CONDUCTIVE CERAMIC CAP : ELECTROLYTIC CAP : MICA CAP : MULTILAYER FILM CAP : METALLIZED PAPER CAP : MYLAR FILM CAP : MULTILAYER MYLAR FILM CAP : PAPER CAPACITOR : POLYSTYRENE FILM CAP : POLYESTER FILM CAP : POLYETHYLENE FILM CAP : POLYPROPYLENE FILM CAP : TANTALUM CAP : CHIP TANTALUM CAP : TRIMMER CAP : CONNECTOR : CONNECTOR, BASE PIN : CONNECTOR, CANNON : CONNECTOR, DIN : CONNECTOR, FLAT CABLE : CONNECTOR, BASE POST : COIL, AM MIX : COIL, FM ANTENNA : COIL, FM DETECT : COIL, FM MIX : OUTPUT COIL : DIODE ARRAY : DIODE BRIDGE : CHIP DIODE : SCHOTTKY BARRIER DIODE : VARACTOR DIODE : CHIP ZENER DIODE : ZENER DIODE : CERAMIC DISCRIMINATOR : FERRITE BEADS : FERRITE CORE : CHIP FET : FLUORESCENT DISPLAY : CERAMIC FILTER : COMB FILTER MODULE : LC FILTER,EMI : GROUND PLATE : GROUND TERMINAL : FUSE HOLDER : IC PROTECTOR : JUMPER CONNECTOR : JUMPER, TEST POINT L.DTCT : LIGHT DETECTING MODULE L.EMIT : LIGHT EMITTING MODULE LED.DSPLY : LED DISPLAY LED.INFRD : LED, INFRARED MODUL.RF : MODULATOR, RF PHOT.CPL : PHOTO COUPLER PHOT.INTR : PHOTO INTERRUPTER PHOT.RFLCT : PHOTO REFLECTOR PIN.TEST : PIN, TEST POINT PLST.RIVET : PLASTIC RIVET R.ARRAY : RESISTOR ARRAY R.CAR : CARBON RESISTOR R.CAR.CHP : CHIP RESISTOR R.CAR.FP : FLAME PROOF CARBON RESISTOR R.FUS : FUSABLE RESISTOR R.MTL.CHP : CHIP METAL FILM RESISTOR R.MTL.FLM : METAL FILM RESISTOR R.MTL.OXD : METAL OXIDE FILM RESISTOR R.MTL.PLAT : METAL PLATE RESISTOR RSNR.CE : CERAMIC RESONATOR RSNR.CRYS : CRYSTAL RESONATOR R.TW.CEM : TWIN CEMENT FIXED RESISTOR R.WW : WIRE WOUND RESISTOR SCR.BND.HD : BIND HEAD B-TITE SCREW SCR.BW.HD : BW HEAD TAPPING SCREW SCR.CUP : CUP TITE SCREW SCR.TERM : SCREW TERMINAL SCR.TR : SCREW, TRANSISTOR SUPRT.PCB : SUPPORT, P.C.B. SURG.PRTCT : SURGE PROTECTOR SW.TACT : TACT SWITCH SW.LEAF : LEAF SWITCH SW.LEVER : LEVER SWITCH SW.MICRO : MICRO SWITCH SW.PUSH : PUSH SWITCH SW.RT.ENC : ROTARY ENCODER SW.RT.MTR : ROTARY SWITCH WITH MOTOR SW.RT : ROTARY SWITCH SW.SLIDE : SLIDE SWITCH TERM.SP : SPEAKER TERMINAL TERM.WRAP : WRAPPING TERMINAL THRMST.CHP : CHIP THERMISTOR TR.CHP : CHIP TRANSISTOR TR.DGT : DIGITAL TRANSISTOR TR.DGT.CHP : CHIP DIGITAL TRANSISTOR TRANS : TRANSFORMER TRANS.PULS : PULSE TRANSFORMER TRANS.PWR : POWER TRANSFORMER ASS y TUNER.AM : TUNER PACK, AM TUNER.FM : TUNER PACK, FM TUNER.PK : FRONT-END TUNER PACK VR : ROTARY POTENTIOMETER VR.MTR : POTENTIOMETER WITH MOTOR VR.SW : POTENTIOMETER WITH ROTARY SW VR.SLIDE : SLIDE POTENTIOMETER VR.TRIM : TRIMMER POTENTIOMETER 11

13 NS-P24/ SW-P24 P.C.B. MAIN NS-P24 12 Z Z Note) Those parts marked with # are not included in the P.C.B. ass'y.

14 NS-P24/ SW-P24 P.C.B. MAIN Parts List for Carbon Resistors Z Z Z Z Z Z Z Value 1. ohms 1.8 ohms 2.2 ohms 3.3 ohms 4.7 ohms 5.6 ohms 1 ohms 15 ohms 22 ohms 27 ohms 33 ohms 39 ohms 47 ohms 56 ohms 68 ohms 75 ohms 82 ohms 91 ohms 1 ohms 11 ohms 12 ohms 15 ohms 16 ohms 18 ohms 2 ohms 22 ohms 27 ohms 33 ohms 39 ohms 43 ohms 47 ohms 51 ohms 56 ohms 68 ohms 82 ohms 91 ohms 1. k-ohms 1.2 k-ohms 1.5 k-ohms 1.8 k-ohms 2. k-ohms 2.2 k-ohms 2.4 k-ohms 2.7 k-ohms 3. k-ohms 3.3 k-ohms 3.6 k-ohms 3.9 k-ohms 4.7 k-ohms 5.1 k-ohms 5.6 k-ohms 6.8 k-ohms 8.2 k-ohms 9.1 k-ohms 1/4W Type Part No. HJ35 31 HJ HJ HJ HJ HJ HF45 41 HJ HF HJ HF HJ HF HF HF HF HF HF HF45 51 HJ HF HF HJ HF HF45 52 HF HF HF HF HF HF HF HF HF HF HF HF45 61 HF HF HF HJ35 62 HF HJ HF HF45 63 HF HJ HF HF HF HF HF HF HF /6W Type Part No. HF85 31 HF HF HF HF HF45 41 HF HF HF HF HF HF HF HF HF HF HF HF45 51 HF HF HF HF HF45 52 HF HF HF HF HF HF HF HF HF HF HF HF45 61 HF HF HF HF85 62 HF HF HF HF45 63 HF HF HF HF HF HF HF HF HF Value 1 k-ohms 11 k-ohms 12 k-ohms 13 k-ohms 15 k-ohms 18 k-ohms 22 k-ohms 24 k-ohms 27 k-ohms 3 k-ohms 33 k-ohms 36 k-ohms 39 k-ohms 47 k-ohms 51 k-ohms 56 k-ohms 62 k-ohms 68 k-ohms 82 k-ohms 91 k-ohms 1 k-ohms 11 k-ohms 12 k-ohms 15 k-ohms 18 k-ohms 22 k-ohms 27 k-ohms 3 k-ohms 33 k-ohms 39 k-ohms 47 k-ohms 56 k-ohms 68 k-ohms 82 k-ohms 1. M-ohms 1.2 M-ohms 1.5 M-ohms 1.8 M-ohms 2.2 M-ohms 3.3 M-ohms 3.9 M-ohms 4.7 M-ohms 1/4W Type Part No. HF45 71 HF HJ HF HF HF HF HF HJ HF45 73 HF HF HF HF HF HF HF HF HF HF HF45 81 HF HF HF HF HJ HF HF45 83 HF HJ HF HJ HJ HJ HF45 91 HJ HJ HJ HJ HJ HJ HJ /4W Type HJ35 1mm 1/6W Type Part No. HF45 71 HF HF HF HF HF HF HF HF HF45 73 HF HF HF HF HF HF HF HF HF HF HF45 81 HF HF HF HF HF HF HF45 83 HF HF HF HF HF HF HF45 91 HF HF HF HF HF /4W Type HF45 1/6W Type HF85 5mm Note) Those parts marked with # are not included in the P.C.B. ass'y

15 A B C D E F G H NS-P24/ 1 EXPLODED VIEW (2) R, T, K, L only (3) R, T, K, L only 6 (1) [4m] [15m] (x 3) 23 NS-P24 (x 2) 24 (x 3) (8 pcs/set x 2) 28 (x 2) (1 pcs/set x 2) 21 NS-P24 (x 4) (x 5) NS-P24 (x 4) (x 5) NX-S12 & NX-C12 requires replacement as a unit. Individual replacement parts will not be supplied. 6 14

16 NS-P24/ MECHANICAL PARTS Z Z Z Z Z Z Z Z Z Z Z Z 15

17 NS-P24/ MEMO NS-P24/ 16

YST-SW/YST-SW TO SERVICE PERSONNEL. Critical Components Information Components having special characteristics are marked s and must be replaced with p

YST-SW/YST-SW TO SERVICE PERSONNEL. Critical Components Information Components having special characteristics are marked s and must be replaced with p YST-SW/ YST-SW SUBWOOFER SYSTEM YST-SW/YST-SW SERVICE MANUAL IMPORTANT NOTICE This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that