1
2
3
4
5
6
YST-MS50/YST-MS55D
A
B
C
D
E
F
G
H
YST-MS50
YST-MS55D
20
■
PRINTED CIRCUIT BOARD (Foil side)
21
LSP+
E
LSP+
E
E
+B
W201
E
+B
SWI
SRI
SLI
RSP+
PWS1
E
E
–12
+12
E
V
OUT
VIN
VIN
VOUT
E
+
–
SUBWOOFER
POWER
TRANSFORMER
VO
LT
A
G
E
SELECT
OR
PO
WER
T
O
RIGHT
SPEAKER
OUTPUT
USB
INPUT
T
O
LEFT
SPEAKER
T
O
RIGHT
SPEAKER
BASS
USB IN USE ONL
Y
110V
-120V
220V
-240V
OFF
ON
SWI
SRI
SLI
RSP+
PWS1
E
E
–12
+12
RE
BL
WH
RE
RE
WH
WH
RE
WH
GR
GR
RE
BE
WH
BR
WH
BE
BR
BE
RE
WH
BE
BL
WH
P. C. B. MAIN (9)
P. C. B. MAIN (3)
P. C. B. MAIN (6)
•
Subwoofer
P. C. B. MAIN (1)
P. C. B. MAIN (2)
P. C. B. MAIN (7)
YST-MS55D
R model only
J,U,C,A,B,G
only
R only
1
G
82
5
4
67
3
9
1
9
1
20
1
OUT
COM
IN
IN
COM
OUT
UPC4570HA
UPC4570HA
STK408-040E
NJM79M12F
A
NJM78M12F
A
5
8
4
1
1
32
16
17
12
43
UD
A1321PS
M24C02-BN6
9
1
UPC4570HA
1
9
UPC4570HA
●
Semiconductor Location
Ref. No.
Location
