Sony TA-AX5 User manual

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
U
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
90
gV
(8
ohms,
network
A)
50
(8
ohms,
1
kHz)
INTEGRATED
STERE0
AMPilHER
tEl
SPECIFICATION
Amplifier
section
ContinuousRMS
power
outout
(Less
than
0.005%
THD, At 20Hz
- 20kHz
tothchannelsdriven 65 + 65watts (8
OhmS)
srmultaneously) According
to DIN 4SS00
65 + 65watts
(8
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
IS
DIRECTLY
CON.
NECTED
TO
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
(1
kHz) S/N
(weighting
network,input level)
PHONO
MC
2.5
mV
0.17
mV
50 ka
100
a
150mV
10
mV
90
dB
82dB'
1L'1.:.'ul
72
dB
68dB*
(A,
0.17
mV)
TUNER
AUX
TAPE1.2 150
mV 50 ka 104
d8
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
Hz
(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
1
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
I
sl4 sr5 sr6 sl7
fsPEAKaR-l
s2 a oN,sl I ofF
s2-r s3-1 s2-2
6kHr
E4:
11
s2511
sr3
-B
ITFEtrLTl
FR-EfiA lTuntrôVgnTneo-l
nr
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
2
DISASSEMBLY
Note: Follow the disassembly
procedure
in the numerical
ordergiven
TOP COVER/PANEL
ASS'Y
TOP COVER: O
PANELASS'Y:
@,@ Q BVTTSx
6
(three
screws
)
o,?{:::":"i,
@ avrrsr d g
(three screws) v
O BVTT3
xI
--qê:
3x6
Qlavrps, a
(two screws)
BV',
two
@ unsolder the terminal screw.

sEcTtoN
3
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)
4-
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
TS
rRn$Fol
---^i
POTEN

TA.AX5
tcl0l,
l5l,
802,804
CX550
tc704M8840698
1c705
MB8400rB
1c803cx770
-10-

TA.AX5
Semiconductor Lead Layouts
OL ÈLb
25K30A
.fi,1 34 5 6 7 8
CTU.22U
'&l
I lll Èflrr
lilTilil/
i i à
,tlj
lll
lll
1i à
"tt^
!!"'noo"
\a
node
ta-*"*
SLRS4URC
A
".,JL..
2SA1175
ffi""'0"
rilil
"Jlilll
R
c-
*"r*
m
.CÈ
æc2769
m
,,W
25D3s8
2s8528
l>'
FYI
luil
ut
2SD809
258649A
230669A
258648
2SD668
letter
srde
F,
,1,
cx761A
cx770
M,s4517.P
lrne
or
slrt
or
oor
(ïop vrew)
25C2681
2SA1141
2SC1364-7
25C2545
2S41015
2S8647
H412002
tne
or
dot
pPD553C141
cx789
pPD8243C
M8840018
M8840698
12
(10p vrew)
2s,C2291
2SA1027R
1S1555
lODF2
3ODL4F
EOA0l-O5R
EOA0l-06R
HZ.6C2L
HZl2C2L
1082
EOB0l-28
r''-"
trr\anode
2SA1(N9
fi

TA.AX5
+1. MOUNTING
DIAGRAM
- Conductor Side -
See
page
11for theSemiconductor
Lead
Layout.
See
pages
8 to 10for blockdiagrams
of lC.
Note:
r Color code of sleeving over the end of the iackel
SECTION
4
DIAGRAMS
B
IIIIPUT
BOARO
o o- : partsextracted from the component side.
. .- : partsextracted from the conductor side.
. m : component-side parrern.
a::::: .
B+pattern
.I: B
-panern
-12-

TA.AX5 \-AX5
++rI
23
-z--7
^!^zJ^ ^"É8. R2r 471
ôrC
(H (H (F'--<
!':-' ?, rt@'
:-:,i'lr-f"
I
I
T
jiffiË
jr,-T-lf#:
?
I
'l
J.
ll
ô'u'jËE
220lr0v
1C802
(FUNCTToN
EoARo
I
-. - E4= ,ii
"', 1
.* 1,.,..
_.
5i ..Ë," T ;1. .r;,à ,iâ
L o Io Jlo Jlo .lo Jlo
4 cs 5lo llo Io 5l
rÏ n ir ; :, 'i-1
"t
- tJ-

TA.AX5
lc tl
rc803 tct5t lclol tc?06 rc7o2
t!?r5r
?os?,,,0,,o?
7,4 rulelfi!?ij*i8à38138g
l;ll,ïlL**l*,?ig!r, ,r.ro, 'c?03
3,6
153
rRANsrsToR
BoÀRo
I

rc40l rc?01
rôr 3t3306
3Ol 555
-' 307309
317
ffit*
301
TA-AX5
905
907
906
908
603
't(B
!lfror
zs
3r5
705
706
3l/t
7073t2
3oit
l0.l
tlot 4@ 'tof
æ7 eol 6 sot
15
?04
60/r
357 702
RT30I RT3O2
lP.P.s
BoARDI
TS
porER lRlltsf(
t:
I
T-
llcousrl
I
FTLTER
I TURI{OVER
| 250 500
F. ?

sPtÂxER0u1Pu1 lElilfiAl
illrPE0.aMf
4-16lr)
IHEA0P]Oi|E
8oaRDl
lDrsPr-aY
soaRDI

4.2. SCHEMATIC
DIAGRAM(1)
(AUD|0
80ARD
(t/2ll
-L- CH
-
Ql0r,
t02
2sc2543
EO AiIP
I
L
-R-CH -
0t5r,0t52
2SC2545
EO ATP
llaRïRlp6a
t\4C+MM5r-|
Rt0l
ilo l r/zwl
0t03
Hz6c2L
LIMITER
Q
103
2SK30A
CURRETITREG
Dt53HZ6C2L
LIMITER
tcr0r
cx550
EQ ATP
-l
I
-J
rc|5r
cx550
AtilP
t*,Er
I
0r5325K30A
CURRETIT
RÊG
TA.AX5
.D
Ril9
750
cll0
6800
2i'.' .u
-L-êËli
-17-

E
BOAR
D
I
0302,352
254i98
PO|ER AIP
030t,35r
25A1049
CURiE{TRfG
c30l
4.7
25V
tEot,356 0304,354
wt22t 2s86rt8
EIAS CURREIIT
0303,352
2SC229l
CURRElll
MIRROR
c3[
470
63V
I
c20l
I
50v
@
o0401
2S0358
VOLTAGEREG
040
|
c
0
c
0
0402 A
2S
\,/0L'.
tc80l
cx789
AMP
-18-

TA.AX5
2SAil41
POIVER ÂIIP ''^J rc
401
HAi2ôôà '8f83
PROTECTOR
c309
0068
50v
c3r0
0.068
50v
0308,309,312
.2\
0358,
359
,362
2Sct634
"9ç91^ 0ggt,-602 5.
zùuJcË E0A0l-06 ,
ù-wËfu-'.'."â"i'#..ifl-_
O
Q602
0602 258734
POTERSUPPLY
,. D{05.{06
i HZ6C2L
LIMIIER
t2
2S

TA-AX5
0607
E0a0l-16
POWÊR
SUPPLY
R605
lok
M
.i.,::'1"'.'.'
.:il. î
''i
--..--_l
IHEA0PHOilE
8oaRol I
:'+
Ëi;'d :. All capacitors are in pF unless
otherwise noted' pF : t't''lF
50WV or t"'s a'" not indicat"d except for electrolytics
and
tantalums'
' All reslstoru
l'" in ohms' %W unless
otherwise'noted'
kO : 1OO0O'
MO : l0OOkO
L-cH . €4tr: nonflammable
resistor'
lsp€at
ER
(al . @F: fusible
resistor.
R-cH r [----l : Paneldesignatlon'
t '- I :adluslment
{or
repait
L50l 1.8!H
"' bus
o-u'|
. --4: B- bus
L-CH . *F: Signal path
Ea,cR(sfl
R.CH
l$) ooto
0603 258647
POWER
SUPPLY
$ c.o.x
O rt*ot,
RECÎ |
I
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