Sony SRS-A37 User manual

Ver 1.0 2000.01
MICROFILM
SRS-A37/A47
SERVICE MANUAL
ACTIVE SPEAKER SYSTEM
SPECIFICATIONS
US Model
Canadian Model
SRS-A37
AEP Model
E Model
SRS-A37/A47
UK Model
Australian Model
SRS-A47
Photo : SRS-A37
Amplifier section
Power output 1.5W + 1.5W (SRS-A37)
2.0W + 2.0W (SRS-A47)
Input impedance
4.7 kiloohms (at 1kHz)
Speaker section
System Full-range, bass reflex type
Speaker unit Full-range (magnetically shielded):
φ 57mm (2 1/4in.)
Nominal impedance
8 ohms
Rated input power
1.5W (SRS-A37)
2W (SRS-A47)
General
Power requirement
DC 9V, six R6 (size AA) batteries
(left speaker only)
Inputs Input cord
Left: Stereo mini plug (1.0m)
Right: monaural mini plug (1.0m)
Battery life (at 5 mW + 5 mW output)
Approx. 10 hours with Sony batteries R6P (SR).
Approx. 24 hours with Sony alkaline batteries LR6 (SG).
Dimensions Approx. 85 x 185 x 110 mm
(w / h / d) (3 3/8x 7 3/8x 4 3/8in.)
Mass Left speaker : Approx. 415g
(15 oz.) not incl. batteries
Approx. 525g (1lb 3 oz.) incl. batteries
Right speaker : Approx. 325g (11 oz.)
Design and specifications are subject to change without notice.

– 2 –
SECTION 1
GENERAL
LOCATION AND FUNCTION OF CONTROLS
This section is extracted from
instruction manual.

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
Q2
J17
DC IN 9V
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
6PCS, 9V
SP1
SPEAKER
S1
POWER
OFF/DIRECT
R
ON
23 4
A
1
B
C
D
S1
-1 -2
-3 -4
158
9
12
16
158
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 µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W 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.
• Voltagesaretaken witha VOM (Inputimpedance 10MΩ).
Voltage variations may be noted due to normal produc-
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
zSemiconductor Location
Ref.No. Location
IC1 B-2
IC2 C-2
Q1 B-3
Q2 D-4
SECTION 2
DIAGRAMS

– 6 – – 8 –– 7 –
SECTION 3
EXPLODEDVIEW
NOTE :
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference
number in the exploded views are not
supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
1 X-3378-367-1 CABINET (L) ASSY, FRONT (SRS-A47)
3 3-042-813-01 BUTTON (POWER) (SRS-A47)
4 3-042-814-01 KNOB(VOLUME) (SRS-A47)
5 4-969-872-01 SPACER, VOLUME
* 6 A-4542-622-A AMPLIFIER BOARD, COMPLETE
7 1-559-891-31 CORD(WITH PLUG)
8 3-042-809-01 CABINET (L), REAR (SRS-A47)
9 3-046-628-01 SPRING (A), BATTERY RELAY (SRS-A47)
10 3-046-630-01 SPRING, MINUS BATTERY (SRS-A47)
11 3-046-629-01 SPRING (B), BATTERY RELAY (SRS-A47)
12 4-981-128-01 CUSHION
13 3-042-811-01 LID,BATTERY CASE
14 4-941-496-01 TERMINAL, BATTERY (SRS-A47)
15 1-696-003-41 CORD(WITH PLUG)
16 X-3378-368-1 CABINET (R) ASSY, FRONT (SRS-A47)
17 3-042-810-01 CABINET (R), REAR (SRS-A47)
SP1 1-505-851-11 SPEAKER (L-CH)
SP2 1-505-851-11 SPEAKER (R-CH)
not supplied
not supplied
#1
#1
#2
#2
#2
#1
#1
#2
#2
#2
SP1
SP2
1
3
4
5
6
7
8912
13
10
11
not supplied
not supplied
not supplied
14
15
16
17
NOTE :
• Due to standardization, replacements in the
parts list may be different from the parts
specified in the diagrams or the components
used on the set.
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• RESISTORS
All resistors are in ohms
METAL : Metal-film resistor
METAL OXIDE :Metal oxide-film resistor
F : nonflammable
• Items marked “ * ”are not stocked since
they are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
• SEMICONDUCTORS
In each case, u : µ, for example :
uA.... : µA.... , uPA.... : µPA....
uPB.... : µPB.... , uPC.... : µPC....
uPD.... : µPD....
• CAPACITORS
uF : µF
• COILS
uH : µH
• Abbreviation
SP : Singapore
AUS : Australian HK : Hong Kong
C&SA : Central and SouthAmerica
Les composants identifiés par une
marque0sont critiques pour la sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
When indicating parts by reference num-
ber, please include the board.
The components identified by mark 0
or dotted line with mark 0are critical
for safety.
Replaceonly withpart number specified.
SECTION 4
ELECTRICAL PARTS LIST
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
*A-4542-622-A AMPLIFIER BOARD, COMPLETE
**************************
< CAPACITOR >
C1 1-162-294-31 CERAMIC 0.001uF 10% 50V
C2 1-126-956-91 ELECT 0.1uF 20% 50V
C3 1-162-294-31 CERAMIC 0.001uF 10% 50V
C4 1-126-956-91 ELECT 0.1uF 20% 50V
C5 1-126-964-11 ELECT 10uF 20% 50V
C6 1-126-964-11 ELECT 10uF 20% 50V
C7 1-126-964-11 ELECT 10uF 20% 50V
C8 1-162-294-31 CERAMIC 0.001uF 10% 50V
C9 1-104-665-11 ELECT 100uF 20% 10V
C10 1-104-665-11 ELECT 100uF 20% 10V
C11 1-137-423-11 MYLAR 0.15uF 5% 50V
C12 1-124-239-00 ELECT 6.8uF 20% 10V
C13 1-126-933-11 ELECT 100uF 20% 16V
C14 1-104-665-11 ELECT 100uF 20% 10V
C15 1-104-665-11 ELECT 100uF 20% 10V
C16 1-137-423-11 MYLAR 0.15uF 5% 50V
C17 1-126-935-11 ELECT 470uF 20% 6.3V
C18 1-162-294-31 CERAMIC 0.001uF 10% 50V
C19 1-104-665-11 ELECT 100uF 20% 10V
C20 1-104-665-11 ELECT 100uF 20% 10V
C21 1-137-423-11 MYLAR 0.15uF 5% 50V
C22 1-162-306-11 CERAMIC 0.01uF 30% 16V
C23 1-126-935-11 ELECT 470uF 20% 16V
C24 1-124-239-00 ELECT 6.8uF 20% 10V
C25 1-126-933-11 ELECT 100uF 20% 16V
C26 1-104-665-11 ELECT 100uF 20% 10V
C27 1-104-665-11 ELECT 100uF 20% 10V
C28 1-162-294-31 CERAMIC 0.001uF 10% 50V
C29 1-137-423-11 MYLAR 0.15uF 5% 50V
C30 1-126-935-11 ELECT 470uF 20% 6.3V
C31 1-162-294-31 CERAMIC 0.001uF 10% 50V
< DIODE >
D1 8-719-911-19 DIODE 1SS119
D2 8-719-911-19 DIODE 1SS119
D3 8-719-819-41 LED LED04HD (POWER)
< IC >
IC1 8-759-512-88 IC TEA2025B
IC2 8-759-512-88 IC TEA2025B
< JACK >
JK1 1-566-822-11 JACK (R OUT)
JK2 1-569-966-11 JACK, DC (DC IN 9V)
< TRANSISTOR >
Q1 8-729-205-83 TRANSISTOR 2SC2458L-GR
Q2 8-729-205-83 TRANSISTOR 2SC2458L-GR
< RESISTOR >
R1 1-247-843-11 CARBON 3.3K 5% 1/4W
R2 1-249-430-11 CARBON 12K 5% 1/4W
R3 1-247-838-00 CARBON 2K 5% 1/4W
R4 1-249-407-11 CARBON 150 5% 1/4W
R5 1-249-429-11 CARBON 10K 5% 1/4W
R6 1-249-429-11 CARBON 10K 5% 1/4W
R7 1-247-843-11 CARBON 3.3K 5% 1/4W
R8 1-249-430-11 CARBON 12K 5% 1/4W
R9 1-247-838-00 CARBON 2K 5% 1/4W
R10 1-249-407-11 CARBON 150 5% 1/4W
R11 1-249-429-11 CARBON 10K 5% 1/4W
R12 1-249-417-11 CARBON 1K 5% 1/4W
R13 1-249-422-11 CARBON 2.7K 5% 1/4W
R14 1-249-422-11 CARBON 2.7K 5% 1/4W
R15 1-247-806-11 CARBON 91 5% 1/4W
R16 1-249-385-11 CARBON 2.2 5% 1/6W
R17 1-247-806-11 CARBON 91 5% 1/4W
R18 1-249-385-11 CARBON 2.2 5% 1/6W
R19 1-249-429-11 CARBON 10K 5% 1/4W
< VARIABLE RESISTOR >
RV1 1-227-173-11 RES, VAR (VOLUME)
< SWITCH >
S1 1-692-040-21 SWITCH, PUSH (1 KEY) (POWER)
**************************************************************
AMPLIFIER
MISCELLANEOUS
**************
15 1-696-003-41 CORD (WITH PLUG)
SP1 1-505-851-11 SPEAKER (L-CH)
SP2 1-505-851-11 SPEAKER (R-CH)
**************************************************************
ACCESSORIES & PACKING MATERIALS
********************************
01-465-817-31 ADAPTOR, AC (AC-S906) (SRS-A47:AEP,SP)
01-467-852-12 ADAPTOR, AC (SRS-A47:AUS)
01-473-582-11 ADAPTOR, AC (AC-S911) (SRS-A47:UK,HK)
01-693-029-11 ADAPTOR, AC (AC-S906) (SRS-A47:C&SA)
3-044-669-11 MANUAL, INSTRUCTION (ENGLISH,FRENCH,
GERMAN,ITALIAN,SPANISH,DUTCH,SWEDISH,
PORTUGUESE) (SRS-A37)
3-044-670-11 MANUAL, INSTRUCTION (ENGLISH,FRENCH,
GERMAN,ITALIAN,SPANISH,DUTCH,SWEDISH,
PORTUGUESE) (SRS-A47)
**************************************************************
**************
HARDWARE LIST
**************
#1 7-685-645-79 SCREW +BVTP 3X6 TYPE2 N-S
#2 7-685-648-79 SCREW +BVTP 3X12 TYPE2 N-S
Ref. No. Part No. Description Remark
SRS-A37/A47
9-927-650-11 Sony Corporation
Personal Audio Division Company 2000A0280-1
Printed in Japan © 2000.1
Published by General Engineering Dept.
The components identified by
mark !or dotted line with mark
!are critical for safety.
Replace only with part number
specified.
Les composants identifiés par une
marque !sont critiques pour
la sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.