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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 | o p
C304
0.001
eH
308
C305,
1OpIeV
308)
R306
R305}
4.7K
330
a
§—-—§——4——6
MONITOR
SW(R)
J103,
OdB
100KQ
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.
tolerances,
(3)
7)
adjustable
Position
FWD
FWD
OFF
OFF
TAPE
TAPE
19 cm/s (7% ips)
NORMAL
1
OFF
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