NAD 90 Manual de usuario

BIAS

ADJUSTMENT PROCEDURE

The

proper

bias

adjustment

most

important

assure

correct

performance

the

amplifier.

Bias

adjustment

necessary

any

the

transistors

are

replaced

the

power amplifier

circuitry

the

amplifier

exhibits

overheating

the

output

transistors

under

normal

operating

condisions.

INDICATOR

ADJUSTMENT

REMARKS

-----:--.—..-—-—------.

.-t----------

---

Adjust

for

0.006

—

0.015

across

Voltmeter

VR6O1a,

Kohm)

R624a,

(0.33

ohm)

with

SIGNAL

REMARK:

Bias

can

also

adjusted

using

line

wattmeter.

Adjust

the

VR6O1a

and

VR6O1b to

the

point

which

the

line

wattmeter

shows

very

slight

increase.

ADJUSTMENT

AND CHECK

POINTS

R624b

R624a

601

0027

PRE-AMP

BOARD

(TOP

VIEW)

co)

I0o_>

II9)——

100

;

.9)’

‘•-

zSo

—.

•—

t0o

(IOO

—I

‘—_—

zco_

ogo

‘00

609).

q,,)

®();;

qLO

P06)

SO6)

‘z

C-’

0028

MAIN

AMP

BOARD

(TOP VIEW)

-J

Transistors.

Powerboard :

TR601a A640 BC560

TR601b A640 BC560

TR 602b BC560 hfe 498

TR 602a BC560 hfe 498

TR 604b 2SC3328 (y) hfe 144

TR 604a 2SC3328 hfe 144

TR 605b C945 hfe 242

TR 605a C945 hfe 246

TR 606b A733 hfe 338 new

TR 606a A733 hfe 338 new

TR 607b BD 139 hfe 110

TR 607a BD 139 hfe 110

TR 608b BD140 hfe 117

TR 608a BD 140 hfe 117

TR 901b BC550 hfe 580 new

TR 901a BC550 hfe 580 new

TR 902b BC550 hfe 594 new

TR 902a BC550 hfe 594 new

Tone control board

TR 501a BC 560 Hfe 542 new.

TR 501b BC 560 Hfe 546 new

TR 502a C1570 (G) Hfe 339

TR 502b C1570 (G ) Hfe 339

TR 503a BC550 Hfe 651 new

TR 503b BC550 Hfe 651 new

TR 504 BC560 Hfe 547 new

TR 505 BC550 Hfe 607 new

TR 506 BC550 Hfe 607 new

TR 801 2SA684 hfe 200

TR 802 2SC1384 hfe 200

C1570 =BC 550

A640 = BC 560

A841 = BC 560

A733 = BC 557

C945 = BC 182

Ceramic caps.

Tone board.

C514 = 154k =150000 pf = 150nF = 0,15 uF = MKT 0,15

C503b = 562k = 5600pf = 5,6nF

C503a = 562k = 5600pf = 5,6nF newtone

C519 = 47pf

C506b = 47pf

C506a = 47pf

C502a = 182k = 1800 pf =1,8nf

C503b = 182k = 1800pf = 1,8nf

C505a = ,001k = 0,001uf = 1 nf newtone

C505b = ,001k = 0,001uF = 1nf

c518 = .001k =0,001uf = 1nf

C516 = 220pf newtone

c 512a= 560 = 560pf

c512b = 560 = 560pf

c513a = 563k = 56000 pf = 56nf ebay 2,50

c513b = 56nf0= 56000pf = 56nf

C526a = .0068 = 0.0068uf = 68nf

C526b = .0068 = 0.0068uf = 68nf

powerboard :

C608b = 100pf

c 608a = 100pf

c904a = 333k 33000pf = 33nf

c 904b = 333k 33000pf = 33nf

c909b = 47 pf

c909a = 47 pf

c 905 a= 333k 33000pf = 33nf

c905 b = 3335 33000pf = 33nf

c 903a =,0027k 0,0027 uf = 2,7 nf

c903b = ,0027k 0.0027uf = 2,7nf

c601a = 220pf

c 601b = 220pf

c607a = 22pf-*+

c607b = 22pf

c611a = 220pf

c611b = 220pf

c808-811 = ,01uF 4x = 10nF

czu,_

—

-L

:Lr

L...

—

_______

____

—

___

____

+—

ITEtfis

_____

0027

PIlE-AMPliFiER R)ARD

_____

_______

_____

0028TiE

MAIN

AMPLIFIER

BOARD

-6

I_4

l-J

mime

wI.

(_4

7097

METER

RIJT

BOARD

11171)’

mm mm

lit

‘I’m

15.

SCHEMATIC

DIAGRAM

P.8

TAPE-I

REC

R._

•f

PHI

C531

•

PflONO-2

TER

TAPE-2

nfl:i

II-4o4;

TAPE

19j

1175

—

lIlt

711

100

its

VA)

its

itt.

---r----

a’

110

--c)

$..VI11A

Lit.

Sn.

‘1

an,..

mis

____

—

1•

SW-I

1(1(CT04

0w4

14114-I

1w-A

4.110-)

Iw-4

740110

1w-I

1071041(15

Sw—I

40-In

1w-I

Sflfl(01

-----no

000

SUISOIIUTE

TRANSISTORS

10101.

105440

104

75)77

$02.).

SIC.)))

111014

SSclllOt

)ICISI)

40007

7.5

71(1111

7.70...

755775

41407.1

71*044

40005.5

1)4

0WI

11014.7

70(4100

7504)0

l40$5

ISCIII

7OCt43

4.405.

71*,))

7I04I

,.0,..

SACIIS)

7OCt47)

30441

1101.5

71*744

7I.0l

750144

4010,

SIC

*114044

00001

IILIOCI

va_I

VOL

_I.,

1M040

V..,,

DAIS

p;;

7134

1170445

1.110..

10004

007

710734

110747

7103)3

0*114

‘177

204

nut

____

lit

04.

_01I

Ill

017.-it

1114

___________

70*347151111

CONNtCTIONS

44107...

10501.

40410...

10504.5

111101

,0•04...

31m’E1

‘370)4

::::i

..o..

11047

411)04

411507...

10)047.5

10400

3$*$41

4)77*4

3)5)33

73*7)4

710404

7*44304

1OCt41

lVrll3,

1*47470

7103)4

7OCt50)

21(7757

j-I

ResIstance

vah,e

mdicuted

ohms

unIes

otherwise

specdted

I,ObG,

1000,000).

CSOlCII)IlCe

vibes

074

01701111

III

ITIIC,Ot)l)dS

unls5

OtII4lW13(

nokd

07(40-014

ISlands

voie

ire

telel4nce

around

under

the

toIIowm

CD*dItIO4,S

s’tnaL

1.000,iY

sid1eS

Numhees

ShOW)

Ill

CIICI5

SIC

Ifl

4011117

Tabla de contenidos

Manuales populares de Amplificador de otras marcas

ASTRO

ASTRO HVO V40 P Manual de usuario

Marantz

Marantz SUPERSCOPE BLA-545 Instrucciones de montaje

Technics

Technics SE-CH770 Manual de usuario

Harman Kardon

Harman Kardon HK6300 Manual de usuario

McIntosh

McIntosh MA6850 Manual de usuario

Electro-Harmonix

Electro-Harmonix ENGLISH MUFF’N Manual de usuario

Viatron

Viatron Autrix Manual de usuario

GME

GME GA9800 Manual de usuario

Atlas

Atlas CP700 Manual de usuario

Roland

Roland KC-1000 Manual de usuario

Pyle

Pyle PFMRA350BW Manual de usuario

Advantage

Advantage S-250 Manual de usuario

IRT Electronics

IRT Electronics DVA-3007 Manual de usuario

Dimavery

Dimavery BA-100 Series Manual de usuario

Sony

Sony XM-S400D Manual de usuario

Schertler

Schertler ROY X Manual de usuario

Phonic

Phonic XP 3000 Manual de usuario

Rockford Fosgate

Rockford Fosgate Power T1500-1bd Manual del propietario