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SERVICE MANUAL
SUPPLEMENT
ocr. 1970
SUBJECT:
PRODUCTION
CHANGE
OF
POWER
SUPPLY
CIRCUIT
BOARD
APPLICABLE
SERIAL
NO.:
37,171
and later (GENERAL
EXPORT
MODEL)
35,261
and later (USA MODEL)
!..
The
following
parts are changed.
See
Fig.1!.
The
former
and
new
parts are
noninterchangeable.
CHANGED
(Electrical Parts):
Q303
New
2SC1014
1-801-002-13
Former
ivy Mveuie board:
waithout.&
t
1-539-390-12
New
power supply
circuit
board, without
components
—
1-539-390.21
=
Former
X-34720-54-1
X-34720-54-2
New
power supply circuit board, with components
fet
a
a
CHANGED
(Mechanical Part):
FG orsxs
@
Sw36
power supply circuit board
O-w3¢
fR-e P3x6
3
QD sw3¢
O)—
wi
-~@BZx 10
D\
OP 3x6
\ie
Power supply circuit board
leg, power supply circuit
~~ board holding
spacer, mylar
_ .
Sheet, mylar (included in
transistor 2SC1014)
transistor, 2SD28
transistor, 2SC1014
~~~
-
— bushing
'=
|
_
LWw3o
a
a
—
G)..
ag
Og
e
5
|
s)
oi
iN)
"} P3x6
side plate (B) ass'y, amp chassis |
x ae
SW3
side plate (B) assy, amp chassis
4
3)
sw3¢
w3o
|
~
w3¢
CIN
before change
after change
Fig. 1
Transistor change
2.
R302
(1002)
is remounted on the power supply circuit board from
the
bias
oscillator
circuit
board,
to prevent
Q304
from
damage
caused when B+ circuit of the bias oscillator board is short-circuited.
See Figs. 2 and 3.
bias oscillator circuit board
|
|
a
Q303
2S8C1014
ie
wa
i.
mo
9303
|
R302
100
Semiconductor
electrode
Power
supply circuit board
*
R302 is remounted.
Fig. 2
Schematic
diagram
To Bias OSC
Circuit Board
T304
é
To Playback Amp,
Circuit Soard,Q2i1
To $301
(BAS Sw)
conductor side
component
side
Fig. 3
Power supply
circuit board
SONY
CORPORATION
0J06100-1
22
es
Printed
in Japan
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