Sony SRSA-57 Service manual

SRS-A57

SERVICE MANUAL

Ver 1.1 2001.07

SPECIFICATIONS

US Model

Canadian Model

AEP Model

UK Model

Australian Model

E Model

9-927-655-12

2001G0200-1

© 2001.7

ACTIVE SPEAKER SYSTEM

Sony Corporation

Personal Audio Company

Shinagawa Tec Service Manual Production Group

SECTION 1

GENERAL

This section is extracted from
instruction manual.

– 2 –

2-1. PRINTED WIRING BOARDS

SECTION 2

DIAGRAMS

SRS-A57

Ver 1.1 2001.07

A

B

Last digit: -11

C

D

SW1

POWER

OFF

R

ON

1

RH BOARD

Last digit: -12

R24

C25

SW1

-1

-2

R21

C17

FU1

US MODEL

EXCEPT
US MODEL

JW6

2

D4

POWER

D4

R20

R5

Q2

C4

R2

R1

R3

3 4

RV1

VOLUME

R7

R16

C15

L1

C5

R8

JW4

D2

C12

C16

C6

R22

R23

C19

IC1

10

C20

5

C21

1

R9

C1

Q1

B
C
E

RED

C3

C18

C11

R12

R11

R13

WHT

JW1

C2

JW2

R6

B
C
E

R14

R4

BLK

D1

C7

C22

+ –

RED

R10

R15

C8

C13

C23

WHT

1-675-921-

RV1-1

C26

C27

RV1-2

R19 R18

C10

C9

R17

12

(12)

P1

(INPUT)

E

z

Semiconductor Location

Ref. No. Location

D1 B-3
D2 B-3
D4 A-2

DC IN 15V

Ref. No. Location

IC1 C-4

Q1 B-2
Q2 B-2

–

JK1

+

SP1

SPEAKER

(L-CH)

Note:

• X : parts extracted from the component side.

• b : Pattern on the side which is seen.

– 3 – – 4 –

11

(11)

JK2

R OUT

SRS-A57

Ver 1.1 2001.07

2-2. SCHEMATIC DIAGRAM

Last digit: -12

R24

1k

Last digit: -11

2.5A

Note:

• All capacitors are in  F unless otherwise noted. pF:  F
50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in  and 1/
specified.

•  : B+ Line.

• Power voltage is dc 15V and fed with regulated dc power
supply from external power voltage jack.

• Voltages are dc with respect to ground under no-signal
conditions.

• Voltages are taken with a VOM (Input impedance 10 M ).
Voltage variations may be noted due to normal produc­tion tolerances.

• Signal path.



4

W or less unless otherwise

– 6 –– 5 –

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.

SECTION 3

EXPLODED VIEW

• 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.

#3

12

11

16

#2

#2

not supplied

8

7

9

7

10

11

11

14

SP1

3

#3

#3

13

#3

#3

6

#2

#2

#2

SP2

#2

#3

15

11

4

#1#2

#1

5

2

1

1

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

1 4-225-536-01 FOOT,RUBBER
2 X-3378-878-1 CABINET (R) ASSY, FRONT
3 X-3378-877-1 CABINET (L) ASSY, FRONT
4 4-224-723-01 SPACER
5 4-224-721-01 KNOB(VOL)

6 4-224-722-01 KNOB(POWER)
7 3-045-507-01 CUSHION (A)
8 4-226-147-01 HOLDER, POWER
9 4-226-146-01 HOLDER, VOLUME

* 10 A-4541-197-A RH BOARD, COMPLETE (US)

* 10 A-4541-200-A RH BOARD, COMPLETE (EXCEPT US)

11 3-045-508-01 CUSHION (B)
12 4-224-718-01 CABINET (L), REAR
13 1-791-865-11 CORD(WITH PLUG) (INPUT)
14 4-224-719-01 CABINET (R), REAR

15 1-791-864-11 CORD(WITH PLUG) (R-CH SPEAKER INPUT)
16 1-792-607-11 CORD, SPEAKER
SP1 1-529-542-11 SPEAKER (L-CH)
SP2 1-529-542-11 SPEAKER (R-CH)

– 7 –

Ver 1.1 2001.07

RH

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.

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

* A-4541-197-A RH BOARD, COMPLETE (US)
* A-4541-200-A RH BOARD, COMPLETE (EXCEPT US)

*****************************

7-685-645-79 SCREW +P 3X6 TYPE2 NON-SLIT

ELECTRICAL PARTS LIST

• SEMICONDUCTORS
In each case, u : µ , for example :

uA.... : µ A.... , uPA.... : µ PA....

uPB.... : µ PB.... , uPC.... : µ PC....

uPD.... : µ PD....

• CAPACITORS
uF : µ F

• COILS
uH : µ H

• Abbreviation
CND : Canadian
SP : Singapore
AUS : Australian
HK : Hong Kong
C&SA : Central and South America

SECTION 4

The components identified by mark 0
or dotted line with mark 0 are critical
for safety.
Replace only with part number specified.

Les composants identifiés par une
marque 0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.

When indicating parts by reference num­ber, please include the board.

< JACK >

JK1 1-794-046-11 JACK,DC(POLARITY UNIFIED TYPE)

(DC IN 15V)

JK2 1-793-817-11 JACK (R OUT)

< CAPACITOR >

C1 1-124-903-11 ELECT 1uF 20% 50V
C2 1-124-903-11 ELECT 1uF 20% 50V
C3 1-126-958-11 ELECT 0.33uF 20% 50V
C4 1-126-958-11 ELECT 0.33uF 20% 50V
C5 1-124-903-11 ELECT 1uF 20% 50V

C6 1-124-903-11 ELECT 1uF 20% 50V
C7 1-126-964-11 ELECT 10uF 20% 50V
C8 1-126-233-11 ELECT 22uF 20% 50V
C9 1-126-964-11 ELECT 10uF 20% 50V
C10 1-126-964-11 ELECT 10uF 20% 50V

C11 1-126-942-61 ELECT 1000uF 20% 25V
C12 1-124-478-11 ELECT 100uF 20% 25V
C13 1-126-964-11 ELECT 10uF 20% 50V
C15 1-126-767-11 ELECT 1000uF 20% 16V
C16 1-126-767-11 ELECT 1000uF 20% 16V

C17 1-162-294-31 CERAMIC 0.001uF 10% 50V
C18 1-162-294-31 CERAMIC 0.001uF 10% 50V
C19 1-162-294-31 CERAMIC 0.001uF 10% 50V
C20 1-162-294-31 CERAMIC 0.001uF 10% 50V
C21 1-164-159-21 CERAMIC 0.1uF 50V

C22 1-162-294-31 CERAMIC 0.001uF 10% 50V
C23 1-162-294-31 CERAMIC 0.001uF 10% 50V
C25 1-164-159-21 CERAMIC 0.1uF 50V
C26 1-164-159-21 CERAMIC 0.1uF 50V
C27 1-164-159-21 CERAMIC 0.1uF 50V

< DIODE >

D1 8-719-911-19 DIODE 1SS119
D2 8-719-911-19 DIODE 1SS119
D4 8-719-945-66 LED SLP190B-51 (POWER)

< FUSE >

FU1 1-532-780-21 FUSE, MICRO (2.5A 125V) (US)

< IC >

IC1 8-759-452-80 IC LA4600

< COIL >

L1 1-419-586-21 COIL, LINE FILTER

< TRANSISTOR >

Q1 8-729-245-89 TRANSISTOR 2SC2458
Q2 8-729-245-89 TRANSISTOR 2SC2458

< RESISTOR >

R1 1-247-843-11 CARBON 3.3K 5% 1/4W
R2 1-247-843-11 CARBON 3.3K 5% 1/4W
R3 1-249-420-11 CARBON 1.8K 5% 1/4W
R4 1-249-420-11 CARBON 1.8K 5% 1/4W
R5 1-247-843-11 CARBON 3.3K 5% 1/4W

R6 1-247-843-11 CARBON 3.3K 5% 1/4W
R7 1-249-430-11 CARBON 12K 5% 1/4W
R8 1-249-430-11 CARBON 12K 5% 1/4W
R9 1-249-421-11 CARBON 2.2K 5% 1/4W
R10 1-249-421-11 CARBON 2.2K 5% 1/4W

R11 1-249-429-11 CARBON 10K 5% 1/4W
R12 1-249-429-11 CARBON 10K 5% 1/4W
R13 1-249-407-11 CARBON 150 5% 1/4W
R14 1-249-407-11 CARBON 150 5% 1/4W
R15 1-249-429-11 CARBON 10K 5% 1/4W

R16 1-249-416-11 CARBON 820 5% 1/4W
R17 1-249-417-11 CARBON 1K 5% 1/4W
R18 1-249-417-11 CARBON 1K 5% 1/4W
R19 1-249-417-11 CARBON 1K 5% 1/4W
R20 1-249-421-11 CARBON 2.2K 5% 1/4W

R21 1-249-413-11 CARBON 470 5% 1/4W
R22 1-249-417-11 CARBON 1K 5% 1/4W
R23 1-249-417-11 CARBON 1K 5% 1/4W
R24 1-249-417-11 CARBON 1K 5% 1/4W

(Last digit -12)

< VARIABLE RESISTOR >

RV1 1-225-279-11 RES, VAR, CARBON 50K/50K (VOLUME)

– 8 –

Ref. No. Part No. Description Remark

< SWITCH >

SW1 1-692-040-11 SWITCH, PUSH (1 KEY) (POWER)

**************************************************************

MISCELLANEOUS

**************

13 1-791-865-11 CORD (WITH PLUG) (INPUT)
15 1-791-864-11 CORD (WITH PLUG) (R-CH SPEAKER INPUT)
16 1-792-607-11 CORD, SPEAKER
SP1 1-529-542-11 SPEAKER (L-CH)
SP2 1-529-542-11 SPEAKER (R-CH)

**************************************************************

ACCESSORIES & PACKING MATERIALS

*******************************

0 1-473-851-11 ADAPTOR, AC (AC-S1510) (US,CND,C&SA)
0 1-473-852-11 ADAPTOR, AC (AC-S1510) (AEP,SP)
0 1-473-853-11 ADAPTOR, AC (AC-S1510) (UK,HK)
0 1-475-756-11 ADAPTOR, AC (AC-S1510) (AUS)

3-044-671-11 MANUAL, INSTRUCTION (ENGLISH,SPANISH)

(US)

SRS-A57

Ver 1.1 2001.07

RH

3-044-671-21 MANUAL,INSTRUCTION

* 3-703-044-26 LABEL, CAUTION (US)
**************************************************************

#1 7-685-104-19 SCREW +P2X6 TYPE2 NON-SLIT
#2 7-685-645-79 SCREW +P3X6 TYPE2 NON-SLIT
#3 7-685-648-79 SCREW +P3X12 TYPE2 NON-SLIT

The components identified by
mark ! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.

(ENGLISH,FRENCH,GERMAN,SPANISH,DUTCH,

SWEDISH,ITALIAN,PORTUGUESE)(EXCEPT US)

**************

HARDWARE LIST

**************

Les composants identifiés par une
marque ! sont critiques pour
la sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.

– 9 –

SRS-A57

REVISION HISTORY

Clicking the version allows you to jump to the revised page.
Also, clicking the version at the upper right on the revised page allows you to jump to the next revised
page.

Ver. Date Description of Revision

1.1 2001.07 RH board change (1-675-921-11 t 1-675-921-12). (ECN-TAB00495)

1.0 2000.02 New