Sony TC-730 - Circuits; System Control Circuit

4-1-2. System Control Circuit
L-CH Power Amp Circuit Board
701
702
0703
:
704
aver
“9706
“9709
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2SC633A
2SCE34A
2SC634A
2SC895
2SCE34A
2SC634A
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ry
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ve
as
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et
se
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120K
470K
: peaker| Selector Switch
cra
Circuit
Board
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| O5V C723 om a | ays! cer “A Beal
SPKR 60!
Ear sd
1OXISem
SPKR 701
cr22
0.001
13V
|470KS R723
10K
0701
Eerie - T1264
4 Q705 Q708 |Q809
2SC634A 2Sc895 i 2)ISC634A
Speaker Selector | Switch
Circuit soho
i !
| Fine MONO |
fe
|
$703-! ae 2 FOS fF12200
Tov
~o4
ee]
Tone Control Circuit l $702-1 $702-2
(RIGHT)
——
R-CH
Power
Amp
Circuit
Board
i
TT
ee
}—__
ry
+
r
eo2-—_—:Q803
:
29807,
:
Q806
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—«2SCE34A
2ScOs4a
2SC634A
.
i
-
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uentenaeere Be
|
Note
:
_ i : Pints C605
10D-2x4
Reverse
Switch
Circuit
Board
120
(1)
Voltages
are
measured
to
ground
from
indicated
point
by
using
a
voltmetr
“C-
-
200V
0702
A
0704
(20
kQ/V
DC)
at
the
tape
speed
of
19
cm/s
(7%
ips).
|
lo
S617-2
se7-1
All
voltages
readings
obtained
may
vary
slightly
due
to
normal
componert
* 7 tolerances.
7a F S70I-1 '
D703
D705
I
:
(2)
All
resistors
and
capacitors
are
rated
in
ohms
and
microfarads
unless
otherwie
4 ! indicated.
-
-
1
;
i
1
(3)
&
;
adjustable
Servo
Control
Circuit
Board
2
|
7
aan
Ty
(4)
Switch,
solenoid
and
relay
positions
in
this
diagram
are
as
per
the
table
below,
8.64
4.7K
H
7
AWW i‘ |epers
1 120+0,033 , y
|
13.5V,
He
RO
jis!
Ref.
No.
Description
Position
i]
|
ser
9
[p=
-
+
=
-
==
--
=
==
2
QO
A
HO
-—-—-1
39
560
(/2W)
ve
tis
ceases
a
ee
ee
|
Mise
4
$601,619
FWD-REV
switch
FWO
4
Oo
te
$602,
605,610,614
PLAY,
FF-STOP
switch
PLAY,
FF
! ‘ S603 POWER switch ON
f
Ke?
4
$604,
612,
613,620
PLAY-FF,
STOP
switch
PLAY
1
07
H
S606
STOP
switch
a
1
ROI2
.
bow
:
1oK
z
Paes
$607,611
FF
switch
f
tT
cgor
|
“ais
Tease
rats
$608,
615,
616
PLAY
switch
al TK |, S609 AUTO SHUT-OFF switch
jer
$617
AUTO
REV
switch
CONT
REY
194
S618
AUTO
OFF
switch
PLAY
r $701 POWER AMP switch ON
UNSWITCHEL
Ae
1
cweo!
$702
MODE
SELECT
switch
STEREO
90
=
6902
sania
canaags
Phe
Sete
yea
!
.
$703
SPKR
SELECT
switch
EXT
SP
pe
oNaeer
AC
Ft
$901
TAPE
SPEED
switch
19
cm/s
(7ips)
2]
”,
avi
tee
OF
acin
PM601
PINCH
ROLLER
solenoid
(PLAY-FF,STOP)
PLAY
PM602 BRAKE solenoid (PLAY, FF-STOP) PLAY, FF
PM603 DIRECTION (FWD-—REV) solenoid FWD
RY601 DIRECTION (FWD-—REV) relay FWD
RY 602 FF relay (PLAY, STOP-FF) PLAY, ST@
=
Ag