Sony TC-730 - Section 4: Diagrams; 4-1. Schematic Diagrams

4-1.
4-1-1.
AUX INPUT
L-cH @
stot
-22¢B 100KO
sey
MIC INPUT
L-CH
J102
-72dB
(LOW)
AUX INPUT
R-CH
J201
-22dB 100KQ
MIC INPUT
R-CH
J202
-724B
(LOW)
‘108-1 l
PH103-1
FWD L-cH
PPIO2-4702
(KQ/ tHe}
PH104 -1
REV L-cH
PPIOZ-4202
PH103 ~2
FWD R-CcH
PPIO2- 4202
(KOZ tht)
PH104 -2
REV R-CH ==
PP102 - 4202
5108-2 (
4a
SCHEMATIC DIAGRAM
Audio Amp. and Bias OSC Circuit
SECTION 4
DIAGRAMS
L-CH
RI3S 10K(D)
Record Amp Circuit Board
105-2 Mic VOL
a R~CH
R235 10K (D) 2
L-CH
ul oH =
eal bien
]
R136 30K(D)
Q204
2SCEMA 2SCE34A
R223
820K
R-CH
R236 30K(D)
Q104
2SC634A
C212
0.0033
9105 |
the 2SC634A
aa
S101-7
BRA
Record Equalizer Circuit Board
S$107-5
az.
a
c5I7 |
Bias OSC Circuit Board
9505 9504 9503
2SC634A 2SC634A_aqy) 2SC634A
| S104-7_S103-7
R514
R516
| Ry > od 4.7K
eh
ERHION~1
FWOL-cH 3< §
ERPIO2—
(.6KO/160ktHe)
ERHIOI-~2 ><
[FWD R-CH
ERHI02-2
REVR-CH <
ERHI01-3
FWD L-CH <=
11
300301 470P
270K 2SC632A
R304
1BOK(N).
302
ATV (7
R303
mT | op
C304
0.001
eH 308
C305,
1OpIeV 308)
R306 R305} 4.7K
330 a
§—-—§——4——6
MONITOR SW(R)
J103,
OdB
100KQ
(C3094)
RSIS
4
|
|
0.001
150K"
—a
ro
O-
S102-2
g,
RaI9
R438
ca03
SF
G
toKiay
ae
ax
@
Fa
|
Af
st08
ro
422
421
|
BINAURAL
Razt
1Ont6V
R439
|
HEADPHONE.
aoe
thar
Pe
10K
‘
a
401
a70P
270K
RA
2SC632A
24v_
9404
0405
va
-
ZSCES4A
2506348
2av
;
R407
Ran
22K
a
we
“eo
a0N.
RAZZ
Caio
02-4
"
R429
(318K
T
rowesv
ah
2iv
au
R430
cae
R435
Ra24
2K
pgae
Vv
300k
ieP
ark
ea
560
Petal
D401
|
4203
(P
1122
038
Ee)
o
100k
W
c420|
Ra36.
|
150V
15
AROY
—~)
R434
.
ME-2
pe
2.3K(B)
16V
j2ve,
T401
t
Calo
CAI7
Ra33
ATOP
2.2K
a
ry
o
o
ERPIO2—
C510
o
o
2
}~200P-
S
S
(450
/ike)
[
Gy
bbbdy
| ach
S107 —4 ERHIOI-4 =
- - FWD R-CH «fj
ERH102-3
REV L-CH 4
ERP 102~
ee een a =
Y {ests
ie
ser
ae
a
|
[20°
se
+ ERH102-4 y 7 330P
hid REVR-cH TY
|
EROS IERIE | i
cata eases o of
oO S103-8
CI
oO
|
$104
-8
ol sor -6
ty
| -O U
Seo | LINE OUT
WO —4- ©) Leon
SOS/ECH
ro
S$101-5,
O Circuit Board
R464
‘S6K
C462
0,033
Note :
(1) Voltages are measured to ground from indicated point by using a voltmeter
(20 kQ/V DC) with no input signal
Voltages
, Ref. No.
$101 -(1~ 8)
$102 - (1~ 9)
$103 - (1~ 8)
$104 -(1~ 8)
$105 -(1~ 2)
S106 - (1~ 2)
$107 -(1~ 5)
S108 - (1~ 6)
$109 -(1~ 2)
S$110-(1~ 2)
—40 —
) are measured
(4) Switch positions in this diagram are as per the table below:
Description
DIRECTION (FWD-—REV) switch
DIRECTION (FWD-—REV) switch
L-CH REC switch
R-CH REC switch
L-—CH MONITOR switch
R-CH MONITOR switch
Equalizer switch
TAPE SELECT switch
HEADPHONE LEVEL switch
SOS/ECHO SELECT switch
in record mode.
All
voltage
readings
obtained
may
vary
slightly
due
to
normal
component
tolerances,
(2)
All
resistors
and
capacitors
are
rated
in
ohms
and
microfarads
unless
otherwise
indicated.
(3) 7) adjustable
Position
FWD
FWD
OFF
OFF
TAPE
TAPE
19 cm/s (7% ips)
NORMAL
1
OFF