Sony TA-AX5 Manual de usuario

UK Model',

General

System

Power

requirements

Powerconsumplion

Dimensions

Weight

Preamplifier

section: low-noiseNFtype

equalizer

amp.; NFtypetone

contror

Power

amplifiersection: pure-complementary

SEPP

dc power

amplifierwith allstages

direct

coupled

Power

supplysection: pulsê

power

supply

circu

itry

AEP model: 22OV ac,50/60Hz

UK model: 24OV ac,5O/60Hz

AEP model; 120watts

K model: 350watts

Approx.

430

x 80x 325mm (w/h/d)

117

x 3tlt

x 13

inches)

including

projectingparts

andcontrols

Approx.5 kg(11

lb4oz)net

Approx.5.8kg(12

lb 13

oz)in shippingcarton

TUNER \

4yI_ ) sr.-70kHz

1?dB

rAPE1,2/

Lessthan

ohms,

network

ohms,

kHz)

INTEGRATED

STERE0

AMPilHER

tEl

SPECIFICATION

Amplifier

section

ContinuousRMS

power

outout

(Less

than

0.005%

THD, At 20Hz

- 20kHz

tothchannelsdriven 65 + 65watts

OhmS)

srmultaneously) According

to DIN

4SS00

65 + 65watts

ohms)

Power

bandwidth

(lHF) 5 Hz 45

KHz

Dynamicheadroom 1.2

dB*

Harmonic

distortion Less

than0.005%

at ratedoulout

Intermodulation

(lMt

distortion

(60

Hz:7kHz

4: 1) Lessthan

0.005%at rated

output

Frequencyresponse PHONO:RIAA

equalization

curve

t0.2 dB

- Continuedon page

2 -

WARNING!!

AN ISOLATION TRANSFORMER

SHOULD BE USED

DURING ANY SERVICE

TO AVOIO POSSIBLE

SHOCK

HAZARD,

BECAUSE

OF LIVE

CHASSIS.

THE CHASSIS

OF THIS RECEIVER

DIRECTLY

CON.

NECTED

THEAC POWER

LINE.

Sc)NY

Residualnoise

Dampingfactor

SAFETY,RELATED

COMPONENT

WARNING!

COMPONENTSIDENTIFIED

BY SHADINGAND MARK

A oN THE scHEMATrc DtAGRAMS. EXpLoDED

VIEWSANO IN THE PARTS LIST ARE CRITICAL TO

SAFE OPERATION. REPLACETHESE COMPONENTS

WITH SONY PARTSWHOSEPART NUMBERS

APPEAR

AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS

PUBLISHED

BY SONY.

lirr--

lIIIII

rrr l

lMrcRoFtLq SERVICE

MANUAL

TA.AX5

Inputs

Sensit

ivily lmpedânce Maxrmum

anput

capability

kHz) S/N

(weighting

network,input level)

PHONO

2.5

0.17

50 ka

100

150mV

82dB'

1L'1.:.'ul

68dB*

(A,

0.17

mV)

TUNER

AUX

TAPE1.2 150

mV 50 ka 104

81dB"

(A,

150mV)

+ '78

tHF

Measured

with rated

output

power

inlo8-ohm

loads

(both

channels

driven

simultaneously)

at 1

kHz

Outputs RECOUT

1,2

Voltaoe150mV

Tone controls

lmpedance

4.7kilohms

SPEAKER

A, B

Acceptsspeakers

of 8

- 16

ohms.

HEADPHONES

Accepts

lowandhighimpedance

headphones

BASS

+10

dB at 50

(turnover

frequency250

Hz)

+10

dB at 100Hz

(turnover

frequency500

Hz)

TREBLE

t10 dB at 25kHz

(turnover

frequency

3 kHz)

+10

dB at 50

kHz

(turnover

frequency6 kHz)

6dB/octave

attenuation

below

15Hz

6dB/octave

attenuation

above

9 kHz

-20 dB

Subsonic

tilter

High

tilter

Muting

->->È'>-F'-È'-È'r:'r-.'r'--'-'->''--r-t--r->'

MODEL IDENTIFICATION

- Specification

Label

AEPmodeli AC22OV

- 50/60H2 120W

UK model:AC240V

- 50/60H2350W

SONY' MoDELtlo.

TA-AXS

INTEGRATED

STEREO

AMPLIFIER

MADE

lNJAmN | 4-e75-132-Ol

-2-

1.1. BLOCKDIAGRAM

sEcTtoN

OUTL

INE

Ætil-J

I acouslrc lJLgll :::::: I

lrrr-ren - -)ll o: I

I TURilov€RFRÊolHz)

ll :: I

| 250 5oo 3k 6r | | -ro: I

ÂCOUSTIC

LEVEL

FLAvoR ADJUSl

FEilôFnFÊffi] lvôLùfrI(+)

lvôtûO(-) lîtPE'l FuNER-l @ lpHolio']

mpE" rcopy;a trLAil Iacousrcl

,racousrrcZl

fi f; ft 11o ft ft f,? ft ft ft ft * *

s30 sæ . sil sro , . q s6 s7 s8 's9' 'srz' 's26 '522' 'sæ'

0703,

rc704,705

-3-

TA.AX5

-8

IBALANCEItBALÀx-cEl

IHFFiLÎEFII

{R} -{L) lMUTlNdldB

ft ft ff *1

sl4 sr5 sr6 sl7

fsPEAKaR-l

s2 a oN,sl I ofF

s2-r s3-1 s2-2

6kHr

E4:

s2511

sr3

-B

ITFEtrLTl

FR-EfiA lTuntrôVgnTneo-l

lEÀSSi-l [EÂSs](+) (-) (+) 2soHz 5o0Hz 3kHr

Ê++È+Fr"^+^

99 99 9? 11 YY YY TT

'srg' 's'9' 'sæ 'sar :z2' s23 s24

SAIIE AS L-CH

VOLUI'E BALAI{CE

L-R

l||lllllllllllll

s2-3 S3-2 s2-4

-4-

1.2. SERVICING NOTE

1. Pulse Power Supply Board Repairing

This set has a pulse power-supply circuit which

is quite different from a conventional power-

supply circuit. The pulse power-supply directly

rectifies and smooths the ac input power to

produce the higher dc voltagesrequired in the

power-supply circuit. When servicing

this set,note

the following.

a) To prevent urrwanted radiation due to pulse

signals in the pulse power-supply circuit, the

pulse power-supply board is shielded by the

aluminum diecast

box.

b) Take care that electrolytic capactitor which is

used after the rectification of ac power source

voltage is charged even if the POWER switch is

turned off. Be sure to use a resistorof at least

several hundred ohms to discharge the capaci-

tor. Direct discharge by means of lead is

dangerous.

2. InverterCircuit TransistorReplacement

Whenany of inverter

transistors

(Q903,Q904)

isbroken,replacetheir transistors

together. A pair

of transistorswith the samerank is provided for

servicefield use.

Rsf. No. Pert No. Description

Q903,Q904 x-4866-605-l Transistor

Ass'y,seryice

3. InverterCircuit TransformerReplacement

The lead wire arrangement

for eachof T90l

andT9O2

in the inverter circuit is shown

in Fig. A.

As the repair

parts,

T90l andT9O2

arcformed

by only iron core. Thus, if the coil is defective,

arangea new transforners

asshown

below. Note

that thelead

lengthsmust

beexact. Also

windthe

coilcarefully.

T90l core lPart No. l-543-098-001

\ l-543-tOO-OO1

7902core (Part

No. l-543-166-00)

( oneturn

I wirelength: 70mm (2% inches)

I diameter : UL 106l AWG28

I two tums

I wirc length: 70mm (2%

inches)

ldiameter : UL lMl AWG28

I two turns

I wirelength : 55 mm (21/6inchesl

I diameter- : UL t6l AWG2B

40 mm ( | 3Âinches)

UL I4:'O AWG22

two tums.

wirelength: 70mm (2i4 inchas)

diameter : UL 106l AWG28

FtC. A

TA-AX5 SECTION

DISASSEMBLY

Note: Follow the disassembly

procedure

in the numerical

ordergiven

TOP COVER/PANEL

ASS'Y

TOP COVER: O

PANELASS'Y:

@,@ Q BVTTSx

(three

screws

)

o,?{:::":"i,

@ avrrsr d g

(three screws) v

O BVTT3

--qê:

3x6

Qlavrps, a

(two screws)

BV',

two

@ unsolder the terminal screw.

sEcTtoN

ADJUSTM

ENT

3-1. ELECTRICAL

ADJUSTMENT

Note:

l. DC BIAS and DC BALANCE adjustments should be

made serveral minutes after the POWER switch is turned

on (POWER ON.).

2. Make DC BIAS adjustment first.

RT3O2

(L-cH)

Repeat

DC BIAS

and

DC BALANCEadjustmentstwo or

threetimes.

After replacing

thepowertransistors,

DC BIASandDC

BALANCEadjustmentsshouldbemade.

RT352

(B-cH)

audio board

RT35I

(n-cH)

DC Bias

Adjustment

(with

nosignal

input)

Procedure:

- L-CH-

Adj.ust

RT302for l0 mV readings.

VOM

(DC range)

DC Balance

Adiustment

(with nosignal

input)

l. Turn Powerswitch

ON. Connect

a VOM AdjustRT301

(L-CH)

andRT35l

reading

on theVOM. (R-CH)for 0V

speaker

terminals.

speaker terminals

-7-

TA.AX5

lc80r

cx789

MOS CONTROL

LOGIC

rc70t llP0553c

DATA

PORT

(G}

DATAPORT

(H)

TA.AX5

tc702uPD8243

rc703

cx76lA tc40rHAl2002

rRn$Fol

---^i

POTEN

TA.AX5

tcl0l,

l5l,

802,804

CX550

tc704M8840698

1c705

MB8400rB

1c803cx770

-10-

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