Sony TAAV-581 Service manual

TA-AV581

SERVICE MANUAL

• This set is the amplifier
section in SEN-T581.

Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol a and “Pro
Logic” are trademarks of Dolby Laboratories
Licensing Corporation.

SPECIFICATIONS

AEP Model

E Model

Australian Model

Amplifier section

European models:
(FRONT)
DIN power output

100 W + 100 W (at rear/center/

woofer off at 1 kHz, 8 Ω)

Continuous RMS power output

120 W + 120 W (at rear/center/

woofer off at 1 kHz, 10%
T.H.D., 8 Ω)

80 W/ch (at SURROUND ON

at 1 kHz, 10% T.H.D., 8 Ω)

(REAR) 50 W (at front/center/woofer

off at 1 kHz, 8 Ω)

(CENTER) 50 W (at front/rear/woofer off

at 1 kHz, 8 Ω)

(WOOFER) 80 W (at front/rear/center off

at 40 Hz, 4 Ω)

Other models:
Peak music power output

1900 W (total)
(FRONT)
Continuous RMS power output

100 W + 100 W (at rear/center/

woofer off at 1 kHz, 10%
T.H.D., 8 Ω)

(REAR) 50 W (at front/center/woofer

off at 1 kHz, 8 Ω)

(CENTER) 50 W (at front/rear/woofer off

at 1 kHz, 8Ω)

(WOOFER) 80 W (at front/rear/center off at

40 Hz, 4 Ω)

Inputs

PHONO (phono jacks):

sensitivity 2.5 mV,
impedance 50 kΩ

CD (phono jacks):

sensitivity 400 mV,
impedance 50 kΩ

TUNER, TAPE, VIDEO1,2 (phono jacks):

sensitivity 250 mV,
impedance 50 kΩ

Outputs

TAPE REC OUT, VIDEO 1 (phono jacks):

voltage 250 mV,
impedance 1 kΩ

PHONES (stereo phone jack):

accepts low and high
impedance headphones

TONE ± 10dB at 100 Hz and 10 kHz

General

Power requirements
European, Australian and Singaporean models:

230 V AC, 50/60 Hz

Other models: 110-120 V AC or

220-240 V AC, 50/60 Hz

(adjustable with the voltage
selector)

Power consumption

180 W
AC outlets 3 switched, total 100 W max.
Dimensions (w/h/d)

Approx. 430 × 160 × 355 mm
Mass Approx. 8.5 kg
Supplied accessories

Remote RM-U581 (1)

Sony SUM-3 (NS) batteries (2)

Design and specifications are subject to change
without notice.

MICROFILM

INTEGRATED AV AMPLIFIER

TABLE OF CONTENTS

SECTION 1

TEST MODE

1. TEST MODE ··································································· 2

2. GENERAL ······································································· 3

3. DIAGRAMS

3-1. Circuit Boads Location ························································ 4
3-2. Printed Wiring Boards – Display Section –························· 5
3-3. Schematic Diagram – Display Section – ·····························7
3-4. Printed Wiring Boards – Power Section – ··························· 9
3-5. Schematic Diagram – Power Section – ····························· 11
3-6. Printed Wiring Board – Main Section – ···························· 13
3-7. Schematic Diagram – Main Section (1/2) – ······················ 15
3-8. Schematic Diagram – Main Section (2/2) – ······················ 17
3-9. IC Pin Function Description ·············································· 19
3-10.IC Block Diagrams ···························································· 21

4. EXPLODED VIEWS

4-1. Front Panel Section···························································· 23
4-2. Chassis Section ·································································· 24

5. ELECTRICAL PARTS LIST ···································· 25

[Fluorescent Indicator Tube, LED All Lit, and Key Check Mode]

1. When the plug is inserted into the outlet while pressing the
3 CLASSIC button, the fluorescent indicator tube and LED
will light up completely.

2. The mode changes as follows each time the 3 CLASSIC button
and WOOFER ON/OFF button are pressed together after 1.

Sequence of Service Modes

Fluorescent Indicator
Tube and LED Check Mode

•

Press the 3 CLASSIC button and

*1

WOOFER ON/OFF button at the same time.

AMP check mode

*2

•

Press the 3 CLASSIC button and

WOOFER ON/OFF button at the same time.

KEY check mode

*3

•

Press the 3 CLASSIC button and

WOOFER ON/OFF button at the same time.

*1 For checking if the fluorescent indicator tube and LED are lit

completely

*2 When the AMP check mode is set, “AMP” is displa yed on the

fluorescent indicator tube. As this mode is not used for servicing,
perform step 2 to enter the KEY check mode.

*3 When the KEY check mode is set, “KEY 0”is displayed on the

fluorescent indicator tube. Each press of the button is counted.
(This excludes the | / u button)
When all buttons are pressed, the AMP check mode is set.
Buttons pressed once will not be counted when pressed again.

3. To exit the test mode, press the | / u button

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH
MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.

— 2 —

LOCATION AND FUNCTION OF CONTROLS

[FRONT PANEL]

SECTION 2

GENERAL

[REAR PANEL]

1 POWER switch (I/u)
2 DOLBY PRO LOGIC indicator
3 SURROUND MODE buttons
4 +, – buttons
5 CONTROL MODE buttons
6 SUPER WOOFER indicator
7 MASTER VOLUME control
8 WOOFER ON/OFF button
9 PHONO button

!º TUNER button
!¡ CD button
!™ TAPE button
!£ VIDEO 2 button
!¢ VIDEO 1 button
!∞ SOUND FIELD buttons
!§ CENTER MODE button
!¶ PHONES jack

Photo : AEP, Singapore, Australian Model

1 REAR SPEAKERS
2 AC OUTLET

(AEP, Singapore, Australian Model)

3 AC power cord
4 WOOFER SPEAKER
5 CENTER SPEAKER
6 FRONT SPEAKERS

7 VIDEO 1
8 VIDEO 2
9 TAPE
!º CD
!¡ TUNER
!™ PHONO

— 3 —

3-1. CIRCUIT BOARDS LOCATION

SECTION 3

DIAGRAMS

TRANS 1 board

TRANS 2 board

SW board

HP board

DISPLAY board

THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMA TIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)

For Schematic Diagrams.
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 Ω and
specified.

• % : indicates tolerance.

•

¢ : internal component.

• 2 : nonflammable resistor.

• 1 : fusible resistor.

• C : panel designation.

Note : The components identified by mark ! or dotted

line with mark ! are critical for safety.
Replace only with part number specified.

1

/

W or less unless otherwise

4

OUTLET board (AEP, SP, AUS Model)

POWER board

REAR SP board

MAIN board

VOL board

For Printed Wiring Boards.
Note:

• X : parts extracted from the component side.

•

® : Through hole.

•

¢ : internal component.

• b : Pattern from the side which enables seeing.

• Waveform

• DISPLAY SECTION

1

IC401 #∞ (X2)

• U : B+ Line.

• V : B– Line.

• H : adjustment for repair .

• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
No mark : FM

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

• Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.
F : FM

• Abbreviation
AUS : Australian model.
SP : Singapore model.

5MHz

• MAIN SECTION

2

IC300 $§ (OSC)

5.8Vp-p

4.0Vp-p8.0MHz

TA-AV581

3-2. PRINTED WIRING BOARDS — DISPLAY SECTION —

12

34567891011121314

(Page 13) (Page 10)

A

DISPLAY BOARD

A

CN402

B

(SUPER WOOFER)

(WOOFER)

E

E

C

4

1

D

WOOFER
ON/OFF

• See page 4 for Circuit Boards Location.

1 4 30 33

(REAR) (TONE)(CENTER)

CENTER

24

25

TONEREARWOOFER

FL401 FLUORESCENT INDICATOR TUBE

80

1

IC401

40 41

65
64

SIMULATED

E

HALL

(STANDBY)

(DOLBY)(HALL)(SIMULATED)

DOLBY

13

E

D

CN401

(DOLBY PRO LOGIC)

E

CENTER

MODE

1

6

E

F

G

H

16

• Semiconductor Location

Ref. No. Location

D401 B-5
D402 B-11
D403 B-11
D404 C-12
D406 C-4
D407 B-5
D408 B-5
D409 B-4
D410 B-4
D411 B-3
D412 B-2
D413 B-12
D414 B-11
D415 B-10

Ref. No. Location

D416 B-9
D417 B-9
D418 B-9
D419 C-3

IC401 C-6
IC402 C-12
IC403 B-10

Q401 C-4
Q402 C-10
Q403 C-9
Q404 C-3

VOL BOARD

1

4

MASTER
VOLUME

1-669-721-

11

(11)

— 5 —

5 GAME 4 MOVIE

3 CLASSIC

2 POPS

TAPECDTUNERPHONO

1 LOCK

VIDEO 1VIDEO 2

1-669-717-

CN405

14

11

(11)

HP BOARD

SW BOARD

1

S401

1-670-206-

6

1

J401

PHONES

11

4

CN406

(11)

11

1-669-722-

(11)

— 6 —

TA-AV581

3-3. SCHEMATIC DIAGRAM — DISPLAY SECTION—

• See page 4 for Waveform. • See page 19 for IC Pin Function Description.

— 7 —

— 8 —

TA-AV581

3-4. PRINTED WIRING BOARDS — POWER SECTION —

12

• Semiconductor
Location

Ref. No. Location

D951 F-8
D952 F-8
D953 F-7
D954 F-7
D955 F-10
D956 E-6

Q901 E-7
Q902 E-6

REAR SP BOARD

R L

A

B

1-669-716-

REAR

SPEAKERS

11

(11)

C

CN103

14

D

• See page 4 for Circuit Boards Location.

345678910111213

TRANS 1 BOARD

E Model

CN903

1-669-719-

1

3

11

(11)

T901

POWER

TRANSFORMER

POWER BOARD

E Model

S902

VOLTAGE

E Model

SELECTOR

1

3

AC OUTLET

CN906

AEP,SP,AUS Model

1

2

F903

E Model

AEP,SP,AUS Model

AEP,SP,AUS Model

1

2

2

AC
IN

OUTLET BOARD

12

1

CN913

CNJ901

E

F

G

H

C

(Page 14)

16

1

TRANS 2 BOARD

CN902

B

(Page 13)

E Model

11

1-669-723-

E

12

1-669-720-

11

(11)

E

T902

POWER

TRANSFORMER

(Page 6)

D

CN907

1-669-718-

11

(11)

AC OUTLET

AEP,SP,AUS Model

(11)

— 9 —

— 10 —

3-5. SCHEMATIC DIAGRAM — POWER SECTION—

TA-AV581

— 11 —

— 12 —