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SON
Y:
SERVICE MANUAL
SUPPLEMENT
eee
SUBJECT:
PRODUCTION
CHANGE
OF POWER
SUPPLY
CIRCUIT
BOARD
APPLICABLE
SERIAL
NO.:
37,171
and later (GENERAL
EXPORT
MODEL)
35,261
and later (USA MODEL)
1.
The following parts are changed.
See Fig. 1.
The former and new parts are noninterchangeable.
CHANGED
(Electrical Parts):
Ref. No.
Description
Part No.
[Former
_|
28D28
8-720-286-70
Q303
New
2SC1014
1-801-002-13
r
Former
maa
[_1-539-390-12
a
power supply circuit board, without components
1-539-390-21
Former
hs)
.
X-34720-54-1
[New
|
~—~Power supply circuit board, with components
X-34720-54-2
CHANGED
(Mechanical
Part):
Description
Former
New
leg, power supply circuit board holding
3-472-230
3-472-308
Gorsxs
OD sw39
power supply circuit board
O-w3¢
@OP3x6
O33
S—-w3¢
@®B2x
10
BN:
@P3x6
&
re SwW3o
leg, power supply circuit
bushing
board holding
ey
power supply circuit board
"Sea
leg, power supply circuit
—-
AN?
_
Spacer, mytar
|
\
_ Sheet, mylar (included in
e
transistor 2SC1014)
_@ \
Sf2
¢
transistor, 2SD28
~ . .
fo
transistor, 2SC1014 —
G
oe iy
bushing
——
ae
ee
call
S2
P3x6
QP3x6
a
—
yy,
ae
SS
oh)
a
¢
side plate (B) ass'y, amp chassis
|
w3o
side plate (B) ass'y, amp chassis
\
oe
w36
La
A-\
before change
after change
Fig. 7
Transistor change
bias oscillator circuit board
Q303
2801014
xe
R302
100
Semiconductor
electrode
Power supply circuit board
R302 is remounted.
Fig.
2. Schematic diagram
To Blos OSC
Circult Boord
To Playback Amp,
Cwrcult Board, Gai
To S301
{BIAS SW)
conductor side
component side
Fig. 3
Power supply circuit board
SONY
CORPORATION
110657 -3
23.
DO
Printed
in Japan
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