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RS-BX606
RS-BX606
1
2
3
4
5
6
7
Hi SCHEMATIC
DIAGRAM
(Parts list on pages 32~35.)
(This schematic diagram may be modified at any time with
development of new technology.)
© Capacity are in micro-farads (uF) unless specified otherwise.
HEAD
e All voltage values shown in circuitry are under no signal condition and
playback mode with volume control at minimum position otherwise
specified.
(
Veseecces Voltage values at record mode.
For measurement us EVM.
¢ Important safety notice
Components identified by AV mark have special characteristics
important for safety.
D
When replacing any of these components, use only manufacturer's
specified parts
¢( _«<—
+B >see
) indicates +B (bias).
¢( mee ee< —B >a ee ) indicates —B (bias).
«a) indicates the flow of the playback signal.
* (<=>)
indicates the flow of the record signal.
e The supply part number is described alone in the replacement parts list.
Production Part No.
Supply Part No.
1C2, 701,
702, 901,
902, 903
1€203
SN74LS74AMEL
SN74LS74AM
* Caution !
IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during
repair.
* Cover the parts boxes made of plastics with aluminum foil.
* Ground the soldering iron.
sok
* Put a conductive mat on the work table.
<
C45
I6VIO
623
10V1I000
c3
C47, 0.01
HI
150 6.3
100
R3
Qi~4
2SC331IAQSTA
REC EQ
(X2/ Cr02/METAL)
R43
PLAYBACK/
REC
AMP
C37
0.047
C27
50V0.33
6.8K
Ic
; AN7351K
28
Ic2
PLAYBACK
40
R54
012
150
Rw,
°
>
3
ne
ov
ov
ov
38
-0.8V
CH="
CH-24"
as
106
Q4
0303
=
2SD2037EFTA
301, 302
Ye OS08 ta
BIAS OSC CONT.
2SC33IIAQSTA
@,
(8.4V)
9903
0913~ 915]
BIAS OSC
<a
-8.3V
KSBSG64ACYGTA | MAlesTA
-8.3V
bd
Q903 BIAS OSC CONT.
L6
Q5,6
2SAIZ309AQSTA
REC EQ
(X2 /Cr02/METAL)
C34
0.033
R6O
5.6K
c44
0.022
2.7mH
ov
CH -0.8V
Q2
560K
c4
6.3V100
97,8
2SC331IAQSTA
(X2/Cr02/METAL)
HX PRO ADJ. VR (Leh)
C305
2200P
W-
R3ii
18K
+
R464
680K
| R463
680K
D302
MTZJSRECTA
(4)
—
C307
S800P
1
10
308
3900P
R310
R309
ABSO |) PEAK
DET. [| DET.
. 4V ]-7.4v ]-3.6V ]-7.5V
],-8¥
76.4v
~8.1V [- 6.3V
R318 33
(-6.8vi]
=
(Z2v)
I
MPX CONTROL.
DTCII4ESTP | 81s
osc conT.
SWITCHING
R312
18K
R320
8.2K
—wv—
ee
R319
1K
\
OVERALL
FREQUENCY
Ne
238
as
BELL CO RECUENGY
HX PRO ADJ. TEST POINT (Rch)
UPCI297CA
eee
DOLBY
HX
PRO
MAISSTA
OVERALL
FREQUENCY
RESPONSE
ADJ.
(Lich)
& These
are the parts)
When
these
parts
a
Thus
it does not ni
M5218AL
M5218L
reiz,
\Q605
uLev)
5.2]
HSV
R929
6.8K
bx
ay
0607,608 BX
MAIG5STA
®
7
© D909,910
Wa MAIGSTA
a
R928
12K'
cae
pa
TEST TERMINAL
c602
6800P
DEOI~ 606,614
S'
&
"13.4V
.
~2UV
i
eee
1SR35200TB
Sed SeACie
Aer 26.61Q606
Aoei4a
601
2SBI3S57EFTA
2SAIZ09AQSTA
ERASE CURRENT CONT.
lh
STABILIZER
cee |
(
120V 60Hz ----{PP]
)
230-240V
S0/60Hz--{EB.EG).
ae
]
2 n a o
|
Metin
aa
Se
Q602
04
9603
a6
605
Q606
Q607
Q608
2SC33IIAQSTA
2SD2037EFTA
2SBIS57EFTA
2SD2037EF TA
KSB5S64ACYGTA
2SC331IAQSTA
2SAI309AQSTA
STABILIZER
REGULATOR
REGULATOR
REGULATOR
REGULATOR
REGULATOR
REGULATOR
|B | POWER
SUPPLY CIRCUIT
POWER
A
G
— 20—
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