Sony TAS-3 Service manual

TA-S3

SERVICE MANUAL

Ver 1.0 2001.05

TA-S3 is the Amplifier section in
MHC-S3.

SPECIFICATIONS

Amplifier section

DIN power output (rated) 60 + 60 watts
Continuous RMS power output (reference)

Music power output (reference)

Inputs
VIDEO (AUDIO) IN: voltage 250 mV,
(phono jacks) impedance 47 kilohms
MD IN: voltage 450 mV,
(phono jacks) impedance 47 kilohms
OPTICAL IN:
(Square optical connector jacks, rear panel)
wavelength 700 nm

Outputs
MD OUT: voltage 250 mV
(phono jacks) impedance 1 kilohms
PHONES: accepts headphones of
(stereo mini jack) 8 ohms or more
FRONT SPEAKER: accepts impedance of 6 to

SUB WOOFER OUT: Voltage 1 V,

(6 ohms at 1 kHz, DIN)
80 + 80 watts

(6 ohms at 1 kHz, 10%
THD)

150 + 150 watts
(6 ohms at 1 kHz, 10%
THD)

16 ohms
impedance 1 kilohms

General

Power requirements 230 V AC, 50/60 Hz
Power consumption 180 watts

Dimensions (w/h/d)
Mass Approx. 6.2 kg
Design and specifications are subject to change

without notice.

0.6 watts (during Power
Saving Mode)

Approx. 280 x 128 x 350 mm

AEP Model

UK Model

9-873-874-11 Sony Corporation

2001E0500-1 Home Audio Company
C 2001.5 Shinagawa Tec Service Manual Production Group

AV AMPLIFIER

TA-S3

TABLE OF CONTENTS

1. SERVICING NOTES............................................... 3

2. GENERAL ................................................................... 4

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 5

3-2. Cover ............................................................................... 6

3-3. Front Panel Section ......................................................... 6

3-4. Back Panel (2CH/VCD) Section .................................... 7

3-5. FRONT AMP Board ....................................................... 7

4. TEST MODE.............................................................. 8

5. DIAGRAMS

5-1. Note for Printed Wiring Boards

and Schematic Diagrams ................................................ 10

5-2. Printed Wiring Boards – FRONT AMP Section – ........ 11

5-3. Schematic Diagram – FRONT AMP Section (1/2) – .... 12

5-4. Schematic Diagram – FRONT AMP Section (2/2) – .... 13

5-5. Printed Wiring Boards – CONTROL Section – ............ 14

5-6. Schematic Diagram – CONTROL Section –................. 15

5-7. Printed Wiring Boards – POWER Section – ................. 16

5-8. Schematic Diagram – POWER Section – ..................... 17

5-9. IC Pin Function Description ........................................... 18

6. EXPLODED VIEWS

6-1. Cover Section .................................................................. 18

6-2. Front Panel Section ......................................................... 19

6-3. Chassis Section ............................................................... 20

7. ELECTRICAL PARTS LIST ............................... 21

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 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 MANU AL OR IN SUPPLEMENTS PUB­LISHED BY SONY.

2

SECTION 1

SERVICING NOTES

This set is a component of the MHC-S3.
The MHC-S3 system configuration is as shown below, and there­fore it does not operate normally unless all four components are
connected.
In performing the repair, connect all components with the system
cables.

Note: The precaution to the users is described on the label stuck on the

back panel (CD player) and in the troubleshooting section in the
Operation Manual.

System Configuration:

AC IN

TA

POWER SUPPLY

ST

TA-S3

SYSTEM & CD µcon

DISPLAY

CDP

TC

TC µcon

FRONT AMP BOARD SERVICE POSITION

In checking the FRONT AMP board, prepare jig
(extension cable J-2501-087-A: 1.25 mm Pitch, 23 core, Length
300 mm)
(Fig A)

Turn over the FRONT AMP board with Heat Sink, THP board
and RELAY board connected.

Remove the back panel
(2CD/VCD) section.

FRONT AMP board
(CN104)

Connect jig (extension
cable J-2501-087-A
to the FRONT AMP board (CN104)
and PANEL board (CN700).

PANEL board (CN700)

Remove the fan motor
connector lead wire.

(Fig A)

3

TA-S3

Parts Identification

The items are arranged in alphabetical order.
Refer to the pages indicated in parentheses ( ) for details.

SECTION 2

GENERAL

This section is extracted from
instruction manual.

Main unit

A/V amplifier

1

O

p

P

o

DIGITAL 9 (28, 32)
ENTER/O/o/P/p 2 (9, 12, 18,

19, 22–27)
EQ qa (24)
EQ ON/OFF qs (9, 24)
FILE SELECT q; (20, 24)
FUNCTION 8 (9, 11, 12, 17, 18,

28)
GROOVE 5 (20)
MOVIE MODE 4 (20, 21)
MULTI CHANNEL DECODING

indicator 6 (22)
MUSIC MODE 3 (20, 21)
PHONES jack qg
SET UP qd (23–26)
SUR qf (22)
VOLUME 7
@/1 (power) 1 (8, 9, 32)

Remote Control

63 4 5 7 82

q;qaqsqdqfqg

9

wk
wj
wh

wg
wf

wd
ws

wa

w;
ql

qk
qj
qh
qg

1

H

hH

hH

.

>

Mm

O

Pp

o

CD H wk (11, 12)
CHECK 3 (12)
CLEAR 4 (12)

2
3
4
5

x

6
7

X

8
9

0
qa
qs
qd

qf

CLOCK/TIMER SELECT qg

(19, 27)

CLOCK/TIMER SET qh (9, 18,

26)
DBFB qd (20)
DISPLAY qk (10, 13, 15, 26, 32)
D.SKIP 2 (11)
ENTER wa (9, 12, 14, 15, 18, 19,

22–27)
EQ qa (24)
EQ ON/OFF qs (9, 24)
FUNCTION w; (9, 11, 12, 17, 18,

28)
GROOVE qj (20)
SET UP q; (23–26)
SLEEP 5 (26)
SUR ql (22)
TAPE A hH wj (16)
TAPE B hH wh (16, 17)
TUNER/BAND wg (14)
TUNING + 7 (14)
TUNING – ws (14)
VOL +/– qf

BUTTON DESCRIPTIONS

@/1 (power) 1
X (pause) 8
x (stop) 6
. (go back) wf
> (go forward) wd
m (rewind) ws
M (fast forward) 7
O/o/P/p 9

4

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

Note 1: The process described in can be performed in any order.
Note 2: Without completing the process described in , the next process can not be performed.

SET

3-2. COVER

(Page 6)

TA-S3

SECTION 3

DISASSEMBLY

3-3. FRONT PANEL SECTION

(Page 6)

3-5. FRONT AMP BOARD

(Page 7)

3-4. BACK PANEL (2CH/VCD) SECTION

(Page 7)

5

TA-S3

)

)

Note: Follow the disassembly procedure in the numerical order given.

3-2. COVER

4

Remove the cover
in the direction of arrow

2

two screws
(case 3 TP2)

3

A

1

three screws
(BVTT3

×

.

A

6)

3

3-3. FRONT PANEL SECTION

2

screw
(BVTP3

6

front panel section

5

×

3

8)

two
claws

lug

3

lug

2

screw
(BVTP3

2

two screws
(case 3 TP2

1

wire (flat type) (23 core)
(CN104)

×

8)

3

lug

5

claw

2

screw
(BVTP3

×

8

4

three screws
(BVTP3

5

two claws

×

8)

6

3-4. BACK PANEL (2CH/VCD) SECTION

)

d

7

three connectors
(CN901, 902, 903)

8

back panel (2CH/VCD) section

5

three screws
(BVTP3

6

1

screw
(BVTP3

×

8)

×

8)

6

connector
(CN105)

5

two screws
(BVTP3

1

screw
(BVTP3

5

×

8)

×

8)

four screws
(BVTP3

TA-S3

×

8

3-5. FRONT AMP BOARD

4

PC board holder

3

screw
(BVTP3 × 8)

2

lug

2

two screws
(BVTT3 × 8)

5

4

RELAY board

3

connector
(CN106)

Remove the FRONT AMP boar
in the direction of the arrow.

1

three connector
(CN913, 914, 915)

4

PC board holder

7

TA-S3

SECTION 4

TEST MODE

Note: Use following buttons in the test mode.

no mark: Button of amplifier unit (TA-S3)
*1 : Button of tuner unit (ST-S3)
*2 : Button of CD unit (CDP-S3)

[MC Test Mode]

Enter the MC Test Mode

1. Press the I/1 button to turn the power on.

2. While pressing the both [STEREO/MONO] *1 and [2CH/

MULTI C] buttons, press the [MUSIC MODE A] button.

3. “GROOVE” indication blinks on the fluorescent indicator tube
in the midst of MC test mode.

4. This mode has two modes (mode 1/mode 2).

5. To change the modes, press three buttons in the same manner
as entering this mode (step 2). Each time the step 2 operation
is repeated, it changes modes alternately.

6. To distinguish the mode, turn the [VOLUME] knob clockwise
or counterclockwise. Then display is shown as follows.

Mode 1: only “MIN” or “MAX”
Mode 2: “MIN”, “1 to 30” or “MAX”

Releasing the MC Test Mode

T o release from this mode, press the I/1 button or disconnect the
power cord.

[GC Test Mode]

Enter the GC Test Mode

Procedure 1:

1. Press the I/1 button to turn the power on.

2. While pressing the both [STEREO/MONO] *1 and [2CH/

MULTI C] buttons, press the [CLOCK/TIMER] *

3. LEDs and fluorescent indicator tube are all turned on of all
units.

Procedure 2:

1. Press the I/1 button to turn the power on.

2. While pressing the both [PLAY MODE] *2 and x *2 buttons,
press the Z (DISC 1) *2 button.

3. LEDs and fluorescent indicator tube are all turned on of all
units.

Version Display Mode

Procedure:

1. Enter the GC test mode.

2. Each time the [TUNER MEMORY] *1 or [DISC 1] *2 button is
pressed, microcomputer or mechanism deck version is dis­played of each unit.

3. Press the [TUNING +] *1 or [DISC 3] *2 button to detail is
displayed the version.

Key Check Mode

Procedure:

1. Enter the GC test mode.

2. Press the [TUNING --] *1 or [DISC 2] *2 button to set the key
check mode.

3. In the key check mode, the fluorescent indicator tube displays
“K 0 J 0 V 0”. Each time a button is pressed, “K” value in­creases. However , once a button is pressed, it is no longer tak en
into account.
“J” value increases like 1, 2, 3 ... if turn the
knob clockwise, or it decreases like 0, 9, 8 ... if turn the JOG
dial counterclockwise.
“V” value increases like 1, 2, 3 ... if turn the [VOLUME] knob
clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial
counterclockwise.

1

button.

[FILE SELECT]

Releasing the GC Test Mode

T o release from this mode, press three buttons in the same manner
as entering this mode or disconnect the power cord.

8

MEMO

TA-S3

9