SERVICE MANUAL

INTEGRATED STEREO AMPLIFIER

E Model

SPECIFICATIONS

TA-DX80Ver 1.0 2001.03

9-929-592-11 Sony Corporation2001C0500-1 Audio Entertainment GroupC 2001.3 General Engineering Dept.

TA-DX80 is the amplifier section inMHC-DX80, MHC-VX888.

The following measured at AC 120, 220, 240 V 50/60 HzDIN power output (rated) 75 + 75 watts

(6 ohms at 1 kHz, DIN)Continuous RMS power output (reference)

100 + 100 watts(6 ohms at 1 kHz, 10% THD)

InputsMD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,(phono jacks) impedance 47 kilohmsMIC: sensitivity 1 mV,(phone jack) impedance 10 kilohmsOutputsPHONES: accepts headphones of(stereo mini jack) 8 ohms or moreFRONT SPEAKER: accepts impedance of 6 to 16 ohmsSURROUND SPEAKER: accepts impedance of 6 ohms

GeneralPower requirementsMexican models: 120 V AC, 60HzE91 models: 220 V AC, 50/60 HzOther models: 120 V, 220 V or 230 240 V AC, 50/60Hz

Adjustable with voltage selector

Power consumption 180 watts

Dimensions (w/h/d) Approx. 150 360 343 mmMass: Approx. 5.5 kg

Design and specifications are subject to change without notice.

AbbreviationE91: 220 V AC area in E model

2TA-DX80

TABLE OF CONTENTS

1. SERVICING NOTE .................................................. 2

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

3. DISASSEMBLY3-1. Disassembly Flow ........................................................... 43-2. Case ................................................................................. 43-3. Front Panel Section ......................................................... 53-4. MAIN Board ................................................................... 5

4. DIAGRAMS4-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 54-2. Printed Wiring Board MAIN Board ........................ 64-3. Schematic Diagram MAIN Board ........................... 74-4. Printed Wiring Boards

INLET/PANEL/TRANS Boards .............................. 84-5. Schematic Diagram

INLET/PANEL/TRANS Boards .............................. 9

4. EXPLODED VIEW ................................................... 10

5. ELECTRICAL PARTS LIST ............................... 10

SAFETY-RELATED COMPONENT WARNING!!COMPONENTS IDENTIFIED BY MARK 0 OR DOTTEDLINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMSAND IN THE PARTS LIST ARE CRITICAL TO SAFEOPERATION. REPLACE THESE COMPONENTS WITHSONY PARTS WHOSE PART NUMBERS APPEAR ASSHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-LISHED BY SONY.

MODEL IDENTIFICATION

REAR VIEW

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.

MODEL NO. TA-DX80INTEGRATED STEREO AMPLIFIER

Mexican model : AC: 120 V - 60 Hz 180 WE91 model : AC: 220 V - 50/60 Hz 180 WOther models : AC: 120/220/230 240 V - 50/60 Hz 180W

AbbreviationE91: 220 V AC area in E model

SECTION 1SERVICING NOTE

3TA-DX80SECTION 2GENERAL

This section is extracted frominstruction manual.

LOCATION OF CONTROLS

Front view

1 Indicator2 LINK/SURROUND/SUB WOOFER indicator3 SURROUND SPEAKER MODE switch4 SURROUND SPEAKER LEVEL control

1 SYSTEM CONTROL connector2 SPEAKER terminal3 VOLTAGE SELECTOR switch

(EXCEPT Mexican and E91 models)4 - AC IN terminal

AbbreviationE91: 220 V AC area in E model

Rear view

1

2

3

4

4TA-DX80

This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

SECTION 3DISASSEMBLY

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

3-2. CASE

3-3. FRONT PANEL SECTION(Page 5)

3-2. CASE(Page 4)

3-4. MAIN BOARD(Page 5)

1 screw (case3 TP2)(8 mm)

1 screw (case3 TP2)(10 mm)

1 screw (case3 TP2)(10 mm)

1 screw (case3 TP2)(8 mm)

2 three screws(BVTP3 8)

2 four screws(BVTP3 8)

3 case

TA-DX80

55

3-3. FRONT PANEL SECTION

3 screw(BVTP3 10)

5 two screws(BVTP3 10)

6 two screws(BVTP3 16)

3 two screws(BVTP3 8)

4

8 MAIN board

1 wire (flat type) (15 core)(CN111)

7 heat sink assy

2 connector(CN501)

4 front panel section

1 wire (flat type) (15 core)(CN111)

3 claw

2 three screws(BVTP3 8)

3-4. MAIN BOARD

SECTION 4DIAGRAMS

4-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:X : parts extracted from the component side.Y : parts extracted from the conductor side. : Pattern from the side which enables seeing. Indication of transistor.

B

These are omitted.

C E

Q

B

These are omitted.

C E

Q

Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F

50 WV or less are not indicated except for electrolyticsand tantalums.

All resistors are in and 1/4

W or less unless otherwisespecified.

2 : nonflammable resistor.5 : fusible resistor.C : panel designation.

A : B+ Line.B : B Line. 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 produc-tion tolerances.no mark : POWER ON

Signal path.F : AUDIO

AbbreviationBR : Brazilian modelE91 : 220 V AC area in E modelMX : Mexican model

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

AbbreviationE91 : 220 V AC area in E modelMX : Mexican model

TA-DX80

66

JW301

C104

C154

IC101

R311

R312

D301

D302

C103C153

R104

C152

R154

C102

IC111

C101

C151

C113

R115

C111

C112Q111

R111R112

R113

R116

R152

Q124

R102

Q125

C114

IC141

C141

C191

R141

R101

R191

R192

R142

R155

TM301

C123

C173

C303

JW101

JW11

0

JW11

1

JW11

2

JW11

3

JW114

JW115

JW118

JW11

9

JW12

0

JW12

1

JW210

JW10

8

R151

JW10

5

JW104

R105

R136

Q127

R135

JW10

01

JW12

2

C262

R554

Q122

Q123

R126

R206

C551

C202

C502

R268

C203

R127

R201

C201

R202

R203

C204

C206

C207R211

R213

D251

R205

R256

R255

R505

R251

Q201

Q251

Q263

R266

R261

R267

R208

R210

R214

R212C257

C251

R252

C253

C256

C254

C552

C252

R207

R506

C255

C205

R257

D201

R253

R260

D252

R555

R556

D202

C553

C554C504

D502 D

552

Q121

Q171

R121

R122

R123

R171

R172

R173

C231

R231

R232

R233

R234

R235

D231

R551

R501

R128

C501

R553

CN501

R258

Q126

R133

EP501

D501

IC20

1

Q551

R204

R264

R265

Q421

Q422

Q423

Q424

Q425

Q426

R435

R437

R436

R438

R433

R434

CN111

R134

R432

R430

R431

R429

JW144

JW145

JW146

JW147

JW14

8

JW14

9

JW15

0

JW151

JW152 JW153

JW156

JW157

JW158

JW159

JW160

JW161

JW162

JW163

JW164

JW16

5

JW167

JW168

JW169

JW171JW172

JW173

JW174

JW179

JW181

JW182

JW183

JW184

JW185 JW186

JW189

JW193

JW194

JW195

JW196

JW19

7 JW198

JW199

JW191

JW192

R254

C261

JW154

Q428

R443

JW15

5

R440

R441

Q427

R502

R442

R552

LP2

R504

Q321 Q323Q322

Q324

Q325

Q326 Q327

Q328

R331

R332

R325

R326

R327

R328

R330

R323

R324

R321

R322

R333

R334

D321

C322

C321

C323C324

C121

R125

IC121

Q262

Q261

R262

R263

C503

R335

C163

C161

C162 Q161

C171

R161R162

R163

R166

R165

R329

R503

R124

R130 Q501

C126

C176

JW125

JW12

6

JW128

JW129

JW130

JW131

JW13

2

JW133

JW134

JW135

JW136

JW13

7JW13

8

JW13

9

JW140

JW14

1

JW14

2

JW14

3

JW170

JW175

JW17

6

JW177

JW17

8

JW180

JW187

R185 R186

Q177

JW16

6

R129 JW127

JW12

4JW12

3

JW35

1

JW18

8

C122

C131

C132

R220

MAIN BOARD

13

12

1

2

CN101SYSTEM

CONTROL

TOHCD-DX80

ORHCD-VX888

8 1

5 4

+

+R

L

SPEAKERIMPEDANCE USE

6 16