Yamaha YSTMS50B, Руководство по обслуживанию

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A B C D E F G H
1
2
3
4
5
6
I J K
7
8
YST-MS50
(M)
■
SCHEMATIC DIAGRAM
* All voltage are measured with a 10M
Ω
/V DC electric volt meter.
* Components having special characteristics are marked Z and
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
10
IC1, 2, 7 : NJM4558D
Dual OP-Amp
IC3 : NJM4556AL
Dual OP-Amp
–IN
1
2
+IN
1
3
–V
CC
4
+IN
2
5
–IN
2
6
OUT
2
7
+V
CC
8
OUT
1
1
–
+
–
+
IC6 : STK408-040E
3 Channels AF Power Amp
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
THERMAL
SENSOR
SUB CH.1
–
+
CH.3
–
+
–
+
CH.2
SUB GND
N.
C
.
CH.2
–
VCC
CH.1
–
VCC
CH.1,2,3 +VCC
CH.1 OUT CH.2 OUT
PRE
–
VCC
PRE +VCC
CH.1 IN
CH.1 NF
C
. C
. C
. BIAS
CH.2 NF
CH.2 IN
CH.3 NF
CH.3 IN
CH.2
–
VCC
CH.3 OUT
LIMITER
A.N.I.C
POWER AMP
LPF
HPF
PHONE AMP
POWER SUPPLY
0
0
0
0
0
0
11.7
0
0
0
-11.5
0
0
0
11.4 11.7 11.4
10.4
0
0
0
11.7
0
0
0
-11.5
0
0
0
-11.5
0
0
0
11.7
0
-27.1
-0.2 -0.2 -0.1 -0.1
-24.3 -0.1 -0.1
25.6
-25.5
0 0
27.1 -27.1 -27.1
0
0
0
0 0
0
0 0
0
0
0
0
0
0
11.7
-11.5
-1.5
0
0
0
0
0
00
0
0
0
0.2
-11.5
0.2
0
11.7
11.7
0
27.1
-11.5
0
-27.1
-27.1
AC43.2
27.1
+
–
+
–
SATELLITE
MIDRANGE
L ch
SATELLITE
TWEETER
L ch
2.2
µ
+
–
+
–
SATELLITE
MIDRANGE
R ch
SATELLITE
TWEETER
R ch
2.2
µ
RE
BL
TO
SUB Wo.
(HEADPHONE)
TO RIGHT
SPEAKER
TO LEFT
SPEAKER
MAIN (C)
VOLUME
(POWER)
INPUT 2
INPUT 1
WOOFER
+
–
MAIN ( D )
RE
BL
MAIN ( B )
TO
SUB Wo.
MAIN ( F )
POWER
MAIN ( E )
BASS
MAIN ( A )
WH
RE
BE
WH
BL
WH
BR
BE
ON OFF
NJM4556AL
NJM4558D
1SS133
Anode
Cathode
B
C
E
2SA1015 (O, Y)
2SC1815 (Y, GR)
2SC2878 (A, B)
RBV-402
D
G
S
NJM78M12FA
STK408-040E
PIN CONNECTION DIAGRAM OF TRAN-
SISTORS, DIODES AND ICS.
+
–
2SK304 (E)
1
2 0
1: OUTPUT
2: COMMON
3: INPUT
3 2
1
NJM79M12FA
1:COMMON
2:INPUT
3:OUTPUT
3 2
1
1
4
8
1
8
– +
OUT 1
–IN
1
–V
CC
+V CC
OUT
2
1
2
3
4 5
+IN
1
–IN
2
+IN
2
– +
6
7
8