Yamaha YST-MS55D Service-Handbuch - Seite 23
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- 1. Table of Contents
- 2. To Service Personnel
- 3. Front and Rear Panels
- 4. Specifications
- 5. Internal View
- 6. Disassembly Procedures
- 7. Usb Port Operation Check
- 8. Block Diagram
- 9. Printed Circuit Board
- 10. Printed Circuit Board
- 11. IC Data
- 12. Schematic Diagram
- 13. Schematic Diagram
- 14. Parts List
- 15. Parts List for Carbon Resistors
A
B
SCHEMATIC DIAGRAM (YST-MS55D)
1
0
0
0
0
VOLUME
2
0
0
0
SATELLITE
–
TWEETER
+
Lch
TO
0
+
0
SUB
SATELLITE
Wo.
–
MIDRANGE
0
Lch
3
TO LEFT
SPEAKER
12.0
11.4
10.7
4
0
0
TO RIGHT
SPEAKER
0
0
5
POWER
-27.2
6
AC43.1
7
8
PIN CONNECTION DIAGRAM OF DIODES, TRANSISTORS AND IC's.
1SS133
D3SBA20
2SA1015(O,Y)
2SK304(E)
RBV-402
1SR139-400
2SC1815(Y,GR)
HSS104TD
2SC2878(A,B)
MTZJ3.9A
2SC3792
Anode
Cathode
C
D
E
12.0
0
0
(HEAD-
PHONE)
-11.5
+
10.1
12.0
SATELLITE
TWEETER
MIDRANGE
(AUTO POWER)
Rch
11.4
12.0
0
0
-11.5
0
0
0
-11.5
12.0
27.1
12.0
0
0
27.1
0
-27.2
-11.5
NJM78M12FA
NJM79M12FA
NJM4556AL
AN78M12F
AN79M12F
1.COMMON
1.COMMON
8
2.INPUT
2.INPUT
3.OUTPUT
3.OUTPUT
G
D S
1
1
3 2
3 2
1
F
G
YST-MS55D
USB IN USE ONLY
USB
INPUT
0
0
2.8
2.8
0
0
2.8
TO
SUB
0
Wo.
1.4
1.3
2.8
+
SATELLITE
Rch
12.0
0
0
0
12.0
0
0
0
0
0
0
0
0
0
0
0
0
0
-11.5
UPC4570HA
STK408-040E
2SD2913(R,S)
M24C02-BN6
9
E
C
1
B
H
I
24.0
2.8
0
2.8
3.4
0
2.8
2.8
0
0
0
2.8
2.8
2.8
0
TO RIGHT
0
SPEAKER
1.4
2.8
0
1.4
OUTPUT
2.8
0
1.4
SUB
WOOFER
0
-1.5
0
0
0
0
-11.5
UPA1321PS
16
8
4
32
1
1
J
K
YST-MS50/YST-MS55D
IC201, 202/ / / / / See page 23, IC DATA
IC1,2,7,8 : UPC4570HA
Dual OP-Amp
1
2
–
+
+
–
1
2
3
4
5
6
7
8
9
Vcc
Vo1 –Vin1 +Vin1 V
+Vin2 –Vin2 Vo2 Vcc
EE
IC3 : NJM4556AL
Dual Op-Amp
+
+
–
–
1
2
3
4
5
6
8
9
IC6 : STK408-040E
3-channel AF Power Amp
20
TR35
TR36
19
D7
R28
R29
TR33
TR34
TR32
R27
TR32
7
R23
R24
R25
PT1
TR30
R26
6
C6
D6
TR26
TR28
R22
TR29
TR27
TR25
17
C5
R21
18
16
C3
R11
15
TR13
TR15
R12
TR17
TR16
TR14
D4
C4
R14
R15
R16
TR18
R13
R17
TR20
TR19
R18
TR21
TR22
R19
D5
3
TR23
TR24
9
5
10
8
TR11
TR12
11
4
D3
R8
R9
TR9
TR10
R7
TR8
TR7
R3
R4
R5
TR6
R6
D2
C2
D1
TR2
TR4
R2
TR5
TR3
TR1
C1
R1
12
13
14
2
1
All voltages are measured with a 10M Ω /V DC electric volt meter.
Components having special characteristics are marked
and
must be replaced with parts having specifications equal to those
originally installed.
Schematic diagram is subject to change without notice.
24