NAD Original instructions Bedienungsanleitung

S 300

SERVICE MANUAL

Draft 2004 August

CONTENTS

FRONT PANEL / REAR PANEL VIEW................................... 3

SPECIFICATIONS................................................... 4

EXPLODED VIEW.................................................. 29

EXPLODED VIEW PARTS LIST ....................................... 30

PACKING DIAGRAM................................................ 31

ALIGNMENT PROCEDURE / ALIGNMENT POINTS........................ 5

WIRING DIAGRAM.................................................. 6

PCB LAYOUT ................................................... 7-12

SCHEMATIC DIAGRAM............................................13-21

IC BLOCK DIAGRAM................................................22

ELECTRICAL PARTS LIST .........................................23-28

SERVICE SAFETY PRECAUTIONS

1. ReplacingtheFuses

2. Safety-checkout (NorthAmericanmodelonly)

CAUTION:

NOTE:

FOR CONTINUED PROTECTIONAGAINST THE RISK OF FIRE REPLACE ONLY

WITHSAMETYPEOFFUSE.

Parts marked with the symbol are critical with regard to the risk of fire and electric shock.

Replaceonlywithpartsrecommendedbythemanufacturer.

Beforereturningtheproducttothecustomer, makeleakagecurrent orresistancemeasurements

todeterminethatexposedpartsareacceptablyinsulatedfromthesupplycircuit.

REFERENCENO. PARTNUMBER DESCRIPTION

F1*AH 5100-2510-1C Fuse 250mA250VTimeLagUL/CSA

F2*AH 5120-0061-0 Fuse12A250VTimeLag6.3x32mm UL/CSA

F1*C 5120-0035-0 Fuse100mA250VTimeLagLBCVDE/SEMKO

F2*C 5120-0025-0 Fuse6.3A250VTimeLagHBCVDE/SEMKO

*AH:NorthAmericanmodelonly

*C :Europeanmodelonly

The graphic symbol of a lightning flash with an arrow point

within a triangle signifies that there is dangerous voltage

within the unit and it posses a hazard to anyone removing

the cover to gain access to the interior of the unit. Only

qualified service personnel should make such attempt.

The graphic symbol of an exclamation point within

an equilateral triangle warns a user of the device

that it is necessary to refer to the instruction

manual and its warnings for proper operation of

the unit.

REAR PANEL CONNECTIONS

FRONT PANEL CONTROLS

1. POWER SWITCH 4. VOLUME CONTROL 7. TAPE MONITOR INDICATOR

2. INFRA-RED RECEIVER 5. INPUT SELECTOR 8. INFRA-RED INDICATOR

3. TAPE MONITOR 6. INPUT INDICATOR 9. POWER INDICATOR

1. RIGHT BALANCED CD INPUT 6. LEFT TAPE INPUT/OUTPUT 11. AC INLET

2. RIGHT VIDEO INPUT 7. LEFT TUNER INPUT 12. LEFT SPEAKER OUTPUT

3. RIGHTAUX INPUT 8. LEFTAUX INPUT 13. GROUND TERMINAL

4. RIGHT TUNER INPUT 9. LEFT VIDEO INPUT 14. RIGHT SPEAKER OUTPUT

5. RIGHT TAPE INPUT/OUTPUT 10. LEFT BALANCED CD INPUT 15. NAD LINK INPUT/OUTPUT

FRONT PANEL / REAR PANEL VIEW

34567

8910

131415

Dual Mono Integrated Amplifier S300

TAPE MONITOR TUNERIR CDAUX VIDEO

345

Measured in accordance with EIA Standard RS-490 (IHF-A-202) 1978.

Physical specifications

Continuous average power output at 8 100W (20dBW)

Input impedance Single ended 10K

Balanced 20K

Sensitivity 350mV

Signal-to-Noise ratio (A-weighted) ref. 1W 88dB

Frequency response 20Hz - 20kHz +/-0.1dB

-3dB

Gain tracking error +/-0.1 at maximum

+/-3dB at -60dB level

Damping factor >110

Dimensions (WxHxD) 450x160 x400mm

Net weight 25.5 kg / 56.1 lbs

(Minimum power per channel, 20Hz-20kHz,

both channels driven, with no more than rated distortion)

(for rated power into 8 )

(ref. 8 , 50 Hz)

DC - 250kHz

SPECIFICATIONS

ALIGNMENT PROCEDURE

IDLE CURRENT ALIGNMENT (no load, no signal)

1. Connect a digital millivoltmeter between TP301 and TP303, and adjust P501 to

obtain a reading of between 30mV and 35mV.

2. Transfer the digital millivoltmeter to TP302 and TP304 and adjust P502 to obtain a

reading of between 30mV and 35mV.

3. Leave power on for at least 5 minutes to allow the idle currents to stabilize.

Re-adjust P501 and P502 as necessary to obtain a reading of between 30mV to

35mV on each channel.

ADJUSTMENT POINTS

TP303

TP301

P501

ALIGNMENT

TOOL

TP304

TP302

P502 ALIGNMENT

TOOL

LEFT POWER AMP PCB RIGHT POWER AMP PCB

WIRING DIAGRAM

JK203

RED

WHITE

BLACK

JK205

RED

BLACK

JK207

RED

BLACK

JK209

RED

BLACK

JK212 JK210 JK208 JK206 JK204

RED

BLUE

BLACK

JK211

RED

BLACK

GRAY

BLACK

(X6) BLACK

(X6)

J402

J403

J404

GROUND TERMINAL

AC INLET

TRANSFORMER - LEFT TRANSFORMER - RIGHT

POWER SWITCH

- LEFT +

SPEAKER

TERMINALS

+ RIGHT -

SPEAKER

TERMINALS

J532

J531

J313 J314

J327

+50V +50V

-50V

SPK

GND L

GND R

J328

-50V

J318

J317 J518

J517

J316

J315 J516

J515 J320

J319 J520

J519 J326

J325 J526

J525 J324

J323 J524

J523

J322

J321 J522

J521

J307

YEL/GRN

J302

J301

ORANGE

WHITE

BLUE

RED

BLACK

BROWN

RED

BLACK

BROWN

BROWN J304

J303

GRAY

GRAY J310

J309

ORANGE

J308

J36

J21 J22 J11 J12

J46

J55

J54

J53

J52

J51

J35

J45

J34

J44

J33

J43

J32

J42

J31

J41

RED

WHITE

PRIMARY - 120V VERSION

PRIMARY - 230V VERSION PRIMARY - 230V VERSION

J401 1

J102

MAIN BOARD

NAD LINK BOARD

LEFT POWER

AMP BOARD

RIGHT POWER

AMP BOARD

POWER SUPPLY BOARD

FRONT PANEL BOARD

BLUE

BLUE WHITE

WHITE

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