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5-4.
SCHEMATIC DIAGRAM—AUDIO SECTION—
1
2
3
4
5
6
7
8.
9
10
11.
12
13
14
15
16
17
18
19
20
21
22
AC IN
foisseyg
Tow a]
Q371,471
(DECK
A}
-7.9
1071 (2/2)
M5218AP
C401
0.47—
SOV
Q161, 261
561,562
LINE MUTE
MUTING
SWITCH
2st 345
DOLBY
B/C
REEL +
aces pameneamee)
A
TO
SYSTEM
+5V
SSN
<+7.5V>-
-
l
|
120V —~ 240V <— 220V
é
HEADPHONES
PJS61
372
R375
LPF
| A
2 ifone,
|
Me.
(Ne ooT) NET
ay
Ae
REC AMP
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= 4.7e SOV 5.3K
VOLTAGE
Redibeb fete aaen
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=
L
L
4.7
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TYPE 4
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(HP BOARD]
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——
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(See page 26.)
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2
TO SYSTEM
R.MUTE (A)
°
S
|
CONTROL
BOARD(2/2)
SE
ra
ms
ATOU
J501
t
g
(See page 25.)
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(DECK
A)
DIRECTION
301,401
MUTING
TO
SYSTEM
BIAS
CONTROL
BOARD(2/2)
RELAY
(See page 26.)
~2.6V
TYPE
(DECK A)
|
L-PB
HTREC,
H-!
CN602
R643
R&42
R641
Sik
47k
62k
R625
R624
R623
R42
ie
eal
@o=e
errs
OOLBY
SWITCH
BIAS
L CH(REC}
GND
_RCHLREC)|
RELAY
DIRECTION
~2.6V
TO TRANSLATION
TYPE
BOARD CNSOI
4+ 7.5V
L CH{PB)
(See page
28.)
GND(SIGNAL)
RCH(PB)
-7.5V
REEL +
REEL—
+5V
HIGH
{ -7viMoTOR)
3
gx
oF
2
ww
Sos
oO
by) CL
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|
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nana
re
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be
Q-~G} om Legs
-
0
-7.4 | -7.4
OUT
SELECT
ae
Q
A SOLBY
B/C
uw
ss
Q131,231
EQ
SWITCH
A
A DOLBY
ON/OFF
R165
RIGS LINE OUT L
Q861,862
PB SELECT
"A/B
(DECK
B)
DOLBY
NR
REEL+
TO SYSTEM
BEERS
CONTROL BOARD (2/2)
+5V
HIGH
(See page 26.)
~7V(MOTOR)
Q151,251
R265 LINE OUT R
EQ SWITCH B
'
MC 4066BCP
PB
SWITCH
A/B
(DECK
B)
+7.5V
L CHIPB)
GND(SIGNAL)
TO
MD HX BOARD
R CH(PB)
CNP31
~7.5V
(See page 28.)
REEL +
REEL —
+5V
DUBBING
gLLEVEL
=
PANEL
BOARD(3/3)
REC SWITCH
LINE /DUBBING
HIGH
[ -rvimorors
(DECK
8)
BIAS
L CHI(REC)
GND
R CHIREC)
TO MD HX BOARD
RELAY
CNP33
2)
ey
(See page 28.)
DIRECTION
QUICK
-2.6V
L
TYPE
7.7
+7.5V.
ae,
La,
Q651
" 1
MUTING SWITCH
2845 Shan
REC GAIN:
R55
=
",
(6)
=
(0)
PB
SWITCH
A/B
r
0,81
"8
_075
REC SELECT
REC/ PB
LINE /DUBBING
SELECT
nN
ne
ine
fer}
CH
Nt
C35!
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876 ZLSL2
TO SYSTEM
ee
a
CONTROL BOARDI2/2) Gee
ne
|_|
|_|
2
(See page 25.)
'% NOT REPLACEABLE: BUILT IN TRANSFORMER
|
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|
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=
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t
CONTROL BOARD(2/2)
REE
| 0)
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|
(See page 26.)
ks be
|
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t
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ay
5-6k
0.47%
SOV
[0.478
SOV
REC
SWITCH
A/8
875
1N4148M
U
SWITCH
72
1N4148M
BIAS
maa Pecast oc eae ome
OFF
OPE
|
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(DECK
3)
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R690
k
56k
36
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36k
62k
100
R68g
47k
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R682
30k
36k
L-PB,
M-REC,
H-MPX
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AMS
SWITCH
A/8
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K
R672
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fl
R670
669
R&68
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R666
R665
R664
R662
39k
200k
220k
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SYSTEM
POWER
IN
Cts
sue
CONTROL BOARD (2/2) ann eat
fe fea
|
a
Fd ei eae a
et Es ge
te i
| ee
vF2
|
VFI
(See page 25.)
Q705
+7.5V REG
B AOLBY
B/C
R721 47%
Q705
2SB1375
+5.3V
I
R677
R676
R675, | 674
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.
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B DOLBY ON/OFF
:
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{EQ
BOARD (2/2))}
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cn
pals
:
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IC603_MC14051BCP
i
DOLBY NR
27k
TO SYSTEM
HSV
CONTROL BOARD(2/2)
R678
R673
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IN4|46M
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me
1¢508 (1/2)
=
Rs
8
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.
7
40.4 AMS AMP
60
a
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| 0.022
.
GND
ia
on
wr
0706,708
3
4p
POWER
2209
SWITCH
—e
ANS
cs8s
HS
= 220p
9 ievo1 72
RIC4S5EP
8
rae,
aan lt
eer)
TO SYSTEM
CONTROL BOARD(2/2)
@
(See page 25.)
3
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,
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2
5
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M
TO
SYSTEM
CONTROL
BOARD
(2/2)
(See page 25.)
TO
SYSTEM
TO
SYSTEM
CONTROL
BOARD(2/2)
CONTROL
BOARD( 2/2)
(See page 25.)
(See page 25.)
23
e IC Block Diagrams
IC506
MC14053BCP
Note:
All capacitors are in wF unless otherwise
noted.
pF: uuF
5OWV
or
less are
not
indicated
except
for electrolytics
and tantalums.
All resistors are in 2 and '/,W or less unless otherwise
specified.
fur-AF : fusible resistor.
Note:
The components
identi-
fied by mark Aor dot-
ted
line
with
mark
are critical for safety.
Replace only with part
number specified.
Note:
Les composants
identifiés
par
une
marque
sont
critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro spéci-
fié.
[
] : adjustment for repair.
Voltage is dc with respect to ground under no-signal
conditions.
no mark:
PLAY
(
): REC
A: DECKA
B: DECK
B
Voltages are taken with a VOM
(Input Impedance
10M).
Voltage variations may
be noted due to normal produc-
tion tolerances.
Signal path.
>>
: PB (DECK A)
>>) : REC (DECK A)
[>
: PB (DECK B)
[>> : REC (DECK B)
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