Read Sony SRS-A37 / SRS-A47 Service Manual online
02
[AMP BOARD]
IC1
IC2
11
(11)
1-677-905-
R18
R16
C17
C14
C26
C30
C13
C25
C5
D3
POWER
C27
C10
C9
C6
C24
C19
C20
C2
C12
C7
C15
C4
R7
R9
R11
R8
D1
D2
R17
R15
R3
R4
R5
R2
R12
R6
J12
J8
J5
R13
R10
R14
R1
R19
J14
J15
J2
J18
C21
C11
C28
C8
C1
C29
C18
C31
C3
J1
J8
J11
J7
J10
J8
J16
C23
C22
J3
J4
J13
J18
C16
E C B
Q1
E
C
B
B
Q2
J17
DC IN 9V
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
6PCS, 9V
SP1
SPEAKER
S1
POWER
OFF/DIRECT
R
ON
2
3
4
A
1
B
C
D
S1
-1
-2
-3
-4
1
5
8
9
12
16
1
5
8
9
12
16
+
–
JK2
P1
(INPUT)
JK1
R OUT
RV1
VOLUME
-1
-2
– 3 –
– 5 –
– 4 –
SRS-A37/A47
2-2. SCHEMATIC DIAGRAM
2-1. PRINTED WIRING BOARDS
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
U
: B+ Line.
• Power voltage is dc 9V and fed with regulated dc power
supply from external power voltage jack (JK2).
• Voltages are dc with respect to ground under no-signal
conditions.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
Note:
• X
: parts extracted from the component side.
• b
: Pattern of the rear side.
D1
C-3
D2
C-3
D3
A-2
Ref. No.
Location
z
Semiconductor Location
Ref. No.
Location
IC1
B-2
IC2
C-2
Q1
B-3
Q2
D-4
SECTION 2
DIAGRAMS
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