Sony TAVE-170 Service manual

TA-VE170

SERVICE MANUAL

• This set is the Amplifier section in HT-K170.

Manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY”, “AC-3”, “Pro Logic” and the double-D symbol ; and “Pro Logic” are trademarks of Dolby Laboratories Licensing Corporation.

SPECIFICATIONS

AEP Model

UK Model

E Model

Australian Model

Chinese Model

Power output

Rated Power Output at Stereo mode

Reference Power Output

Frequency response

Inputs

Sensitivity

TV, VIDEO, DVD 2CH,

5.1 CH/ DVD

250 mV

(DIN 1 kHz, 8 ohms)

25 W + 25 W

(DIN 1 kHz, 8 ohms) Front: 25 W / ch Center: 25 W Rear: 25 W / ch

TV, VIDEO, DVD 2CH,

5.1 CH/DVD : 10 Hz - 50 kHz +0.5/–2 dB

Impedance

50

kilohms

S/N

(weighting

network,

input level)

85

dB*

(A, 250 mV)

*78IHF

Outputs

Muting

General

Power requirements

Power consumption

Dimensions

Mass (Approx.)

Design and specifications are subject to change without notice.

WOOFER:

Voltage: 1 V Impedance: 1 kilohms

Full mute

220 - 230 V AC, 50/60 Hz

115 W

430 x 274 x 64.5 mm

4.6 kg

HOME THEATER SYSTEM

TABLE OF CONTENTS

1. GENERAL ········································································· 3

2. DISASSEMBLY ································································ 4

3. TEST MODE·····································································5

4. DIAGRAMS········································································6

4-1. Notes for Printed Wiring Board

and Schematic Diagram·················································· 6 4-2. Printed Wiring Board – MAIN Section – ······················ 9 4-3. Schematic Diagram – MAIN Section (1/2) – ·············· 10 4-4. Schematic Diagram – MAIN Section (2/2) – ·············· 11 4-5. Printed Wiring Boards – PANEL Section –················· 12 4-6. Schematic Diagram – PANEL Section – ····················· 13 4-7. Printed Wiring Boards – POWER Section – ··············· 14 4-8. Schematic Diagram – POWER Section –···················· 15 4-9. IC Pin Function Description ········································· 16

5. EXPLODED VIEWS····················································· 17

6. ELECTRICAL PARTS LIST·····································19

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 MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

Flexible Circuit Board Repairing

• Keep the temperature of soldering iron around 270˚C during repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

2

1

1 ?/1 button 2 CENTER MODE button 3 VIDEO button 4 TV button 5 DVD 2CH button 6 5-1 CH/DVD button 7 SOUND FIELD button 8 MASTER VOLUME knob

2

SECTION 1

GENERAL

3 4

5 6 7 8

1 5.1 CH/DVD 2 DVD 2CH 3 TV

15 7

3

8642

4 VIDEO 5 WOOFER 6

FRONT SPEAKER

This section is extracted from instruction manual.

9

7 REAR SPEAKERS 8 CENTER SPEAKER 9 Mains lead

3

s

)

SECTION 2

DISASSEMBLY

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

CASE, FRONT PANEL SECTION

2

two tapping screws

6

flat wire (CNS301)

4

case

3

screw (BVTP3 x8)

8

front panel section

MAIN BOARD

claw

6

connector (CNS800)

7

four screws (BVTP3 x8)

5

connector (CNP802)

4

connector (CNS801)

claw

1

two tapping screw

5

flat wire (CNS302)

7

six screws (BVTP3 x8)

8

Remove the MAIN board to direction of the arrow

A

2

DC fan

A

1

two screws (BVTP3 x8)

3

six screws (BVTP3 x8

4

SECTION 3

TEST MODE

This equipment is provided with a test mode built in the microcomputer . The contents are described in the following.

[Initial Mode]

1.

Press ?/1 button while pressing both [TV] and buttons simultaneously.

2. “INITIAL” is displayed on the fluorescent indicator tube, and the status of the unit is set in the following.

• All Memory is clear.

• Center, rear level set to 0.

• Center mode set to NORMAL.

• Muting clear.

• Volume level set to min.

• FAN is on.

[Factory Mode]

1.

Press

?/1

button while pressing three buttons of

[DVD2CH]

2. Factory setting same as initial except center mode set to normal using jog can set to volume max or min directly.

[FL Check Mode]

1. Press simultaneously.

2. Fluorescent indicator tube and LED are checked, “FINISH” is displayed and the status of the unit is set back in normal condition.

, and

?/1

button while both

[5.1CH/DVD]

[

CENTERMODE

simultaneously.

[5.1CH/DVD]

[VIDEO]

]

and

[TV]

buttons

,

[Gain Up Mode]

1. Press

2. “NOMAL” is displayed on the fluorescent indicator tube and

3. T o exit from this mode, press tw o buttons in the same manner as

[Version Mode]

1.

2. V ersion of its destination is displayed on the fluorescent indicator

[FAN ON/OFF]

• Press

• “FAN ON” t fan always turn on.

• “F AN AUTO” t when micro computer detected enough input

?/1

button while pressing

the rear is gained up 3 dB.

step1. “GAIN LOW” is displayed on the fluorescent indicator tube and the status of the unit is set back in normal condition.

Press

?/1

button while pressing three buttons of

[

DVD2CH

tube.

signal fan turn on automatically. Normally fan is off.

]

and

[

SOUNDFIELD

?/1 button while pressing

[

SOUNDFIELD

]

button.

[CENTERMODE]

]

buttons simultaneously.

[CENTERMODE]

button.

,

5

SECTION 4

d

B

These are omitted.

CE

Q

DIAGRAMS

• Circuit Boards Location

SECONDARY board

PW.SW borad

PRIMARY board

STANDBY board

MAIN boar

DISPLAY board

JOG board

4-1. NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM

Note on Schematic Diagram:

• 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 1/ specified.

¢

•

• 2 : nonflammable resistor.

• C : panel designation.

• U : B+ Line.

• V : B– Line.

• Voltages and waveforms are dc with respect to ground

• V oltages are taken with a V OM (Input impedance 10 MΩ).

• Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

: internal component.

Note:

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

under no-signal conditions. Voltage var iations may be noted due to normal produc-

tion tolerances. Voltage var iations may be noted due to normal produc-

tion tolerances.

F : FRONT/AUDIO IN f : REAR E : CENTER j : W OOFER

4

W or less unless otherwise

Note:

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• b : Pattern from the side which enables seeing.

• Indication of transistor.

C Q

B

E

These are omitted.

• Waveforms – MAIN Board –

1 IC300 #¡ (OSC)

8 MHz

– DISPLAY Board –

1 IC201 #¢ (X1)

3.4 Vp-p

6

4.3 Vp-p

4.19 MHz

• IC Block Diagrams

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

CONTROL

LATCH

SHIFT RESISTOR

LEVEL SHIFT

CL

DI

CE

VEE

OUT

IN

OUT

IN

OUT

IN

VSS

S

RESET

VDD

OUT

ININ

OUT

IN

OUT

IN

– STANDBY Board –

IC950 NJM2103D

8

RESET

+

–

VSA

7

6

VSB/SESIN

V+

5

+

–

VSC

OUTC

GND

CR

1

2

+

–

3

4

VREF

Q

R S

+

–

– MAIN Board –

IC100 M62447SP

DVDD

42

1

OUT4

2

OUT3 OUT2 OUT1

AVDD

SW IN

GND S

SR IN

SL IN

GND C

C IN GND R1 GND R2 GND L1 GND L2

R IN GND LR

L IN

NC

3 4

5 6 7 8

9 10 11 12 13 14 15 16 17 18

21 – 19

OUTPUT

PORT

MICRO COMPUTER INTERFACE

41 40 39 38 37

36

35 34

33

32

31 30 29

22 – 28

CLK DATA LATCH DGND AGND

SW OUT

SR OUT SL OUT

C OUT

R OUT

L OUT AVSS1 AVSS2

NC

IC500 LC78212

7

IC300 LV1035M

R BPF2

R BPF1

S DC OUT

C DC OUT

R DC OUT

L DC OUT

V REF

VCC

C OUT

S OUT

R OUT

L OUT

GND

L IN

R IN

S IN

R BPF3

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

1

2

BPF

3 4 5 6

V REF

7 8

9

C

S

10

R

11

L

12

13

14

15

16

A

B

A

B

RECT

STRIM

L

R

S

L+R RECT

A

B

A

B

A

R

B

A

L

B

A

B

S

DC CUT2

L-R RECT

DC CUT1

VCS TH

LOGIC

FF

VCA VCA

VCA VCA VCA VCA

S

A

B

S

VCS 2

VCS 1

LOGIC LOGIC

S

MODE

A

B

A

VLR 2

VCA VCA

C MODE

STRIM

VOL/

MUTE

A

BB

L RECT

IN

FILTER

SRAM

PCM

RECT

B NR

OUT

FILTER

DC CUT4

VOL

CONTROL

FILTER

VLR 1

LR

VLR TH

LOGIC

DC

CUT

FF

A

B

A

B

CH

CONTROL

A

S

C

B

CONTROL

BPF

NOISE

GEN

A

B

VOL

R RECT

DC CUT3

BPF

R

DEV

DATA

DECODER

L BPF3

L

OSC

48

47

46

45

44

43 42 41 40

39

38

37

36

35 34

33

L BPF2

L BPF1

RT IN

LT IN

DC CUT

C MODE

GND NS BPF1 NS BPF2

OSC

CLK

DATA

ENABLE

DATA CLK

VSS

VDD

1817

19 20 21 22 23 24 25 262728 29 30 31 32

NS

A/D

VCC

DELAY OUT

DET

IREF

GND

S-OUT

R-OUT

L-OUT

DC CUT

D/A

VDD

OSC

8