Sony SRS-T55 User manual

Ver 1.0 2001.03
ACTIVE SPEAKER SYSTEM
9-873-102-11
2001C0200-1
© 2001.3
Sony Corporation
Audio Entertainment Group
General Engineering Dept.
SRS-T55
SERVICE MANUAL
SPECIFICATIONS
E Model

2
SRS-T55
Specifications ........................................................................... 1
1. GENERAL ...................................................................... 2
2. DISASSEMBLY
2-1. Battery box ................................................................. 3
2-2. Speaker ....................................................................... 3
2-3. AMP board, DC Jack board ........................................ 4
3. DIAGRAMS
3-1. Printed Wiring Boards ................................................ 5
3-2. Schematic Diagram ..................................................... 6
6. EXPLODED VIEWS .................................................... 7
7. ELECTRICAL PARTS LIST ..................................... 8
TABLE OF CONTENTS
SECTION 1
GENERAL This section is extracted from
instruction manual.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
LOCATION AND FUNCTION OF CONTROLS

3
SRS-T55
SECTION 2
DISASSEMBLY
2-1. BATTERY BOX
2-2. SPEAKER
• The equipment can be removed using the following procedure.
Note :Remove Speaker (R) in the same way.
2
6
4
7
B
9
3Screws (+ P2X6)
8Screws (+2.6X6)
1Screws (+ P2X5)
Cabinet (L), rear
Speaker
lead
Cabinet (L), front
Bar, tension
Shaft (L), rotary
Speaker (L)
(SP1) A
5Remove the speaker
lead from groove of
"Cabinet (L), front".
On attaching, set it
as shown in the
figure. While pushing claw in the arrow
Adirection, remove "Shaft (L),
rotary" by pushing it out in the
arrow Bdirection.
2
4
3
6
1
5Screws (+ P2X6)
7Remove soider
(four places
)
5Screws (+ P2X6)
Front section
Battery box
Lid, battery case
Set
Front section Speaker
Battery box AMP board, DC Jack board
Note : Follow the disassembly procedure in the numerical order given.

4
SRS-T55
2-3. AMP BOARD, DC JACK BOARD
5
2
3
1Screws (+ P2X6)
Lid, battery case
Box (L), battery
AMP board
DC Jack board
Box (R), battery
Cord (with plug
)
6Remove solder
(two places)
4Remove solder
(five places)

55
SRS-T55
12
(12)
1-679-480- 12
(12)
1-679-473-
12
(12)
1-679-473-
DC JACK BOARD (SIDE A) AMP BOARD (SIDE A)
AMP BOARD (SIDE B)
DC JACK BOARD (SIDE B)
12
(12)
1-679-480-
BCE
Q2
BCE
Q1
R11
R9
R1
R5
R7 R3
R15
C21C19
R16
R17
C20
C1
C103
R6
C25
R20
R18
C18
R10
R12
C2
-1 -3
-4-2
C104
C101
C26
R4
C102
OFF/DIRECT
C24
R19
R2
V+ V+
GND GND
R
L
G
R8
R14
C23
D1
D3
C13
C16
C15
C4
C3
C22 C5
C6 C14
C10
C17
+
-
C9
C7C8C12C11
SP2
SPEAKER(R)
8Ω
+
-
SP1
SPEAKER(L)
8Ω
P1
(INPUT)
ON
r
S1
POWER
1
5
11 15 20
10
IC2
1
5
11 15 20
10
IC1
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION LR6)
4PCS, 6V
JK1
DC IN 6V
D2
POWER
23 4 5 6 7 89
1
B
C
D
E
F
G
A
3-1. PRINTED WIRING BOARDS
D1 D-7
D2 E-7
D3 E-8
IC1 F-9
IC2 D-9
Q1 B-6
Q2 C-5
Ref. No. Location
zSemiconductor
Location
SECTION 3
DIAGRAMS
Note:
•X: parts extracted from the component side.
•z: Through hole.
•: Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)

66
SRS-T55
3-2. SCHEMATIC DIAGRAM
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 1/4 W or less unless otherwise specified.
•C: panel designation.
• Power voltage is dc 6 V and fed with regulated dc power supply
from external power voltage jack (JK1).
• Voltages are dc with respect to ground under no-signal conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production toler-
ances.
• Signal path.
F: LINE INPUT
+
-
+
-
DC IN 6V
IC1
POWER AMP
SPEAKER
(L-CH)
POWER AMP
SPEAKER
DRY BATTERY
SIZE"AA"
(IEC DESIGNATION LR6)
4PCS,6V
S1-4
S1-3
S1-2
S1-1 S1
ON
OFF/DIRECT
POWER
IC2
(R-CH)
BRIDGE
OUT2
BOOT2
GND
FEEDBACK
IN2(+)
SVR
VCC
OUT1
BOOT1
GND
FEEDBACK
IN1(+)
GND(SUB)
GND
GND
GND
GND
GND
GND
BRIDGE
OUT2
BOOT2
GND
FEEDBACK
IN2(+)
SVR
VCC
OUT1
BOOT1
GND
FEEDBACK
IN1(+)
GND(SUB)
GND
GND
GND
GND
GND
GND
TEA2025D-013TR
TEA2025D-013TR
20 19 18 17 16 15 14 11
+
–
13 12
+
–
THERMAL
PROTECT
START
CIRCUIT
10987654321
DECOUPLING
VCC OUT 1 BOOT 1 GND GND GND GND FEEDBACK IN1 (+) GND (SUB)
BRIDGE
OUT 2
BOOT 2
GND GND GND GND
FEEDBACK
IN2 (+)
SVR
• IC BLOCK DIAGRAMS
IC1,2 TEA2050D-013TR

SRS-T55
7
SP1
9
10
23
7
8
11
16
21
17
23
1
23
22
23
6
5
423
24
18
15
14
20
23
2
3
22
19
23
SP2
not supplied
12 13
SECTION 4
EXPLODED VIEWS
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.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
1 3-222-473-01 CABINET (R), FRONT
2 3-222-484-02 KNOB, POWER
3 3-222-472-01 CABINET (L), FRONT
4 3-222-476-01 SHAFT (L), ROTARY
5 3-222-474-01 CABINET (L), REAR
*6 A-4542-657-A AMP BOARD, COMPLETE
7 3-222-470-02 BOX (L), BATTERY
8 3-222-477-01 LID, BATTERY CASE
9 3-222-462-02 LEVER, EJECT
10 3-222-480-01 TERMINAL, RELAY
11 3-224-484-01 TERMINAL (B), RELAY
12 3-222-481-01 SPRING, RELAY
13 3-222-482-01 TERMINAL (MINUS), BATTERY
14 3-222-483-01 TERMINAL (PLUS), BATTERY
*15 1-679-480-12 DC JACK BOARD
16 3-222-471-02 BOX (R), BATTERY
17 1-559-891-81 CORD (WITH PLUG)
18 3-222-479-01 BAR, TENSION
19 3-222-475-01 CABINET (R), REAR
20 3-222-478-01 SHAFT (R), ROTARY
21 3-224-496-01 SCREW (1.7)
22 7-685-133-19 SCREW +P 2.6X6 TYPE2 NON-SLIT
23 7-685-104-19 SCREW +P 2X6 TYPE2 NON-SLIT
24 7-685-103-19 SCREW +P 2X5 TYPE2 NON-SLIT
SP1 1-529-855-11 SPEAKER
SP2 1-529-855-11 SPEAKER
• The mechanical parts with no
reference number in the exploded
views are not supplied.
• Accessories and packing materials
given in the last of this parts list.

8
SRS-T55
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
SECTION 5
ELECTRICAL PARTS LIST
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
AMP
When indicating parts by reference num-
ber, please include the board.
*A-4542-657-A AMP BOARD, COMPLETE
********************
<CAPACITOR>
C1 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10V
C2 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10V
C3 1-126-188-11 ELECT CHIP 0.15uF 20% 50V
C4 1-126-188-11 ELECT CHIP 0.15uF 20% 50V
C5 1-128-397-21 ELECT CHIP 100uF 20% 16V
C6 1-128-397-21 ELECT CHIP 100uF 20% 16V
C7 1-126-209-11 ELECT CHIP 100uF 20% 4V
C8 1-126-209-11 ELECT CHIP 100uF 20% 4V
C9 1-128-397-21 ELECT CHIP 100uF 20% 16V
C10 1-128-397-21 ELECT CHIP 100uF 20% 16V
C11 1-126-209-11 ELECT CHIP 100uF 20% 4V
C12 1-126-209-11 ELECT CHIP 100uF 20% 4V
C13 1-128-397-21 ELECT CHIP 100uF 20% 16V
C14 1-128-397-21 ELECT CHIP 100uF 20% 16V
C15 1-126-393-11 ELECT CHIP 33uF 20% 10V
C16 1-124-779-00 ELECT CHIP 10uF 20% 16V
C17 1-124-779-00 ELECT CHIP 10uF 20% 16V
C18 1-125-837-91 CERAMIC CHIP 1uF 10% 6.3V
C19 1-125-837-91 CERAMIC CHIP 1uF 10% 6.3V
C20 1-125-837-91 CERAMIC CHIP 1uF 10% 6.3V
C21 1-125-837-91 CERAMIC CHIP 1uF 10% 6.3V
C22 1-126-935-11 ELECT 470uF 20% 16V
C23 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C24 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C25 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C26 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C101 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C102 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C103 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C104 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
<DIODE>
D1 8-719-800-76 DIODE 1SS226
D2 8-719-812-43 DIODE TLG124A (POWER)
D3 8-719-105-57 DIODE RD3.9M-B1
<IC>
IC1 8-759-524-84 IC TEA2025D-013TR
IC2 8-759-524-84 IC TEA2025D-013TR
<TRANSISTOR>
Q1 8-729-230-49 TRANSISTOR 2SC2712-YG
Q2 8-729-230-49 TRANSISTOR 2SC2712-YG
<RESISTOR>
R1 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R2 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R3 1-216-814-11 METAL CHIP 270 5% 1/16W
R4 1-216-814-11 METAL CHIP 270 5% 1/16W
R5 1-216-821-11 METAL CHIP 1K 5% 1/16W
R6 1-216-821-11 METAL CHIP 1K 5% 1/16W
R7 1-216-823-11 METAL CHIP 1.5K 5% 1/16W
R8 1-216-823-11 METAL CHIP 1.5K 5% 1/16W
R9 1-216-813-11 METAL CHIP 220 5% 1/16W
R10 1-216-813-11 METAL CHIP 220 5% 1/16W
R11 1-216-833-11 METAL CHIP 10K 5% 1/16W
R12 1-216-833-11 METAL CHIP 10K 5% 1/16W
R14 1-216-821-11 METAL CHIP 1K 5% 1/16W
R15 1-216-821-11 METAL CHIP 1K 5% 1/16W
R16 1-216-821-11 METAL CHIP 1K 5% 1/16W
R17 1-216-789-11 METAL CHIP 2.2 5% 1/16W
R18 1-216-789-11 METAL CHIP 2.2 5% 1/16W
R19 1-216-823-11 METAL CHIP 1.5K 5% 1/16W
R20 1-216-823-11 METAL CHIP 1.5K 5% 1/16W
<SWITCH>
S1 1-554-896-21 SWITCH, SLIDE (POWER)
***********************************************************
*1-679-480-12 DC JACK BOARD
**************
<JACK>
JK1 1-568-907-21 JACK,DC(POLARITY UNIFIED TYPE) (DC IN
6V)
************************************************************
MISCELLANEOUS
***************
17 1-559-891-81 CORD (WITH PLUG)
SP1 1-529-855-11 SPEAKER
SP2 1-529-855-11 SPEAKER
************************************************************
DC JACK

9
SRS-T55
Ref. No. Part No. Description Remark
ACCESSORIES & PACKING MATERIALS
********************************
3-224-729-21 MANUAL, INSTRUCTION
(ENGLISH,FRENCH,GERMAN,SPANISH,DUTCH,
ITALIAN,PORTUGUESE,SWEDISH)

REVISION HISTORY
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Ver. Date Description of Revision
1.0 2001.03 New
SRS-T55