Kenwood KAC-PS521 Bedienungsanleitung

B53-0139-00 (N)2439

POWER AMPLIFIER

KAC-PS521

KAC-X521

SERVICE MANUAL

RESETREMOTETO H/UID NUMBER

POWER IN

FUSE(30A×2)

VOLTFAN

CURRTEMP

Screw set

(N99-1752-05)

Screw set

(N99-1577-15)

Heat sink

(F01-1751-01)

Accessory

(W01-1606-05)

Cover

(F07-1138-12): KAC-X521

(F07-1139-12): KAC-PS521

Screw

(N07-0003-08) Screw

(N09-4214-08)

Fuse (30A)

(F52-0015-05)

KAC-PS521/X521

BLOCK DIAGRAM

(X09-5760-10)

(X08-4150-10)

I.S.A I.F.S

L.P.F

H.P.F

LCD DRIVER

LCD

V PROT. TEMP

PROT.

IC1,10 IC1 IC3,4,6

IC5

ED1 IC7

MUTE POWER AMP

Q101,102

CONT.

AMP

u-COM

5V AVR

FAN AVR FAN

-15V AVR

+15V AVR

DC/DC

CONVERTER

SW 5V

AVR

Q69

Q66

Q356,358

IC2 Q61

Q62

IC6

P-CONT

GND

BAT

to POWER AMP

to H/U

CURRENT PROT

DC PROT

●PREAMPLIFIER UNIT (X08-4150-10)

Ref. No Application / Function Operation / Condition / Compatibility

IC1 Infrasonic filter Controlled by microprocessor

IC3 Tone and volume variable

IC4 6dB voltage amplification

IC5 HPF

LPF

IC6 Lch : 6dB voltage amplification

Rch : Signal 180 reverse and 6dB voltage amplification

IC7 LCD driver Controlled by microprocessor

●AUDIO UNIT (X09-5760-10)

Ref. No Application / Function Operation / Condition / Compatibility

IC1 Buffer

IC2 DC/DC converter

IC3 AMP communication buffer

COMPONENTS DESCRIPTION

KAC-PS521/X521

Ref. No Application / Function Operation / Condition / Compatibility

IC5 H/U communication buffer

IC6 Microprocessor

IC7 Reset IC

IC8 E2PROM

IC9 Current detection

IC10 Isolation amplifier

Q50 5V AVR

Q51~54 DC/DC output driver

Q55~60 DC/DC

Q61 +15V AVR

Q62,63 -15V AVR

Q64,65 DC/DC converter (IC2) ON/OFF Controlled by microprocessor

Q66,68 5V AVR

Q69 5V AVR ON/OFF

Q70,71 Power supply detection

Q81 +15V AVR

Q91,92 When P-CON is OFF, DC/DC driver stop speedy

Q97 AMP communication stability power supply

Q101,102 Mute

Q103~112 A class first stage amplifier

Q113~118 A class 2nd stage amplifier

Q119,120 Final temperature compensation

Q121~124 Amplifier current detection

Q125~132 Final driver

Q133~140 Final

Q141 Mute control

Q142~145 Amplifier limiter

Q146,147 Amplifier current detection

Q148,149 DC detection

Q301~307 H/U communication output driver

Q313 H/U communication output driver

Q314 H/U communication ON/OFF

Q341~344 H/U communication input driver

Q346 H/U communication output driver

Q347~349 AMP and H/U communication ON/OFF control

Q351,352 BATT voltage output

Q353~358 Fan stability power supply

Q403 LCD backlight LED control

Q404 LED control

COMPONENTS DESCRIPTION

KAC-PS521/X521

AMP_SCL LX_REQ_M

LX_REQ_S

LX_DATA_M

LX_DATA_S

LX_CLK

LX_RST

HU_BU

AD-I

AD-V

TEMP1

TEMP2

TEMP3

TEMP4

TEMP5

TEMP6

COMM-SW

D-PWER

POWER-ON

5VSW

V_DOWN

PCON

LX_CON

L_DATA_L

L_DATA_A

L_CLK

L_CE

FAN1

FAN2

AMP_SDA

AUDIO_SCL

AUDIO_SDA

AUDIO_MUTE

E2P_SCL

E2P_SDA

LCD-ILL

WHITE-LED

MUTE1

MUTE2

DIP-SW1

DIP-SW2

DIP-SW3

DIP-SW4

MODEL1

MODEL2

DC-DET

D-CUR

AB-CUR

ATT1

ATT2

ATT3

AMP µ-com

784224YGC117

Audio control

AMP communication I/F LX BUS I/F

Display data monitor

Power supply control

LCD driver I/F

Fan control

Destination, AMP ID

Protection control

Illumination control

Mute control

E2PROM I2C

communication

●MICROPROCESSOR : 784224YGC117 (X09 : IC6)

◊Block Digram

◊Terminal Function

Pin No. Pin Name I/O Function Processing Operation Description

1~3 TEMP4~TEMP6 I Temperature detection 4~6

4AVSS - GND

5L_CE O CE output to LCD driver H : LCD driver CE

6 LX_REQ_S O Data transmit request to H/U H : OFF, L : ON

7AVREF1 - DA reference voltage

8L_DATA_L I Data input from LCD driver

9L_DATA_A O Data output to LCD driver

10 L_CLK O CLK output to LCD driver

11 LX_DATA_M I Data input from H/U

12 LX_DATA_S O Data output to H/U

13 LX_CLK I CLK input from H/U

14 LX_BU I LX BUS communication, H/U connect detection H : Not connect (Except master amplifier), L : Connect

15 NC O Not used

16 SDA_AMP I/O Data input/output AMP communication

17 NC O Not used

MICROCOMPUTER’STERMINAL DESCRIPTION

KAC-PS521/X521

Pin No. Pin Name I/O Function Processing Operation Description

18 SCL_AMP I/O CLK input/output AMP communication

19 AUDIO_SCL I/O CLK input/output with audio chip

20 AUDIO_SDA I/O Data input/output with audio chip

21 AUDIO_MUTE O Mute output to audio chip H : Mute OFF, L : Mute ON

22 E2P_SCL I/O CLK input/output with E2PROM

23 E2P_SDA I/O Data input/output with E2PROM

24 NC O Not used

25~28

DIP-SW1~DIP-SW4

IAMP address setting

29 MODEL1 I Model setting 1

30 MODEL2 I Model setting 2

31,32 NC O Not used

33 VSS1 - GND

34~37 NC O Not used

38 LCD-ILL O LCD backlight switch H : ON, L : OFF

39 WHITE-LED O Triangle illumination switch H : ON, L : OFF

40 NC O Not used

41~43 ATT1~ATT3 O Output attenuate due to rise in temperature 1~3 H : Attenuate, L : Not attenuate

44,45 NC O Not used

46 COMM-SW O Communication IC power switch H : ON, L : OFF

47~50 NC O Not used

51 D-PWER O D class amplifier power supply control H : ON, L : OFF (2ch/4ch L fixed)

52 DC-DET I Speaker output DC voltage detection H : Normal, L : Abnormal

53 NC O Not used

54 POWER-ON O Amplifier power supply control H : ON (D/AB class), L : OFF

55 5VSW O 5VSW H : OFF, L : ON

56 MUTE1 O Amplifier section input stage mute control H :OFF, L :ON

57 MUTE2 O Driver stage pop-noise mute control H : OFF, L : ON

58 FAN1 O Fan rotation control H : Operate, L :Stop

59 FAN2 O Fan speed control H : Low speed, L :High speed

60 RESET - Hard reset H : Normal, L : Reset

61 PCON I Amplifier power control H : OFF, L : ON

62 LX_CON I LX-BUS communication control H : OFF, L : ON

63 LX_REQ_M I Data receive request from H/U H : ON, L : OFF

64 NC O Not used

65 V_DOWN I Momentary power down detection H : ON (Power down detection), L : OFF (L fixed)

66 NC O Not used

67 VSS0 - GND

68 VD1 - VDD

69 X2 - Main clock input 1

70 X1 - Main clock input 2

MICROCOMPUTER’STERMINAL DESCRIPTION

KAC-PS521/X521

◊LogicTable

1) Destination

The destination in AMP does not mean the sales regions but

specific models.

The following are the models.When reset is released, it is

checked only once.

Model name MODEL1 (29pin) MODEL2 (30pin)

KAC-PS811D/X811D Low Low

KAC-PS521/X521 Low High

KAC-PS621/X621 High Low

KAC-PS541/X541 High High

Pin No. Pin Name I/O Function Processing Operation Description

71 TEST - Flash ROM writing

72 XT2 - Not used

73 XT1 - Not used

74 VDD0 - VDD

75 AVDD - VDD

76 AD-I I First current detection (for display)

77 AD-V I BU voltage detection (for display)

78~80 TEMP1~TEMP3 I Temperature detection 1~3

MICROCOMPUTER’STERMINAL DESCRIPTION

2) AMP ID

AMP ID is checked only ohce at the time reset is released or

when the microcomputer is released from the low consump-

tion mode.

When set to AMP ID 8/9 no remote control is possible.

AMP ID DIP-SW1 DIP-SW2 DIP-SW3 DIP-SW4

(25pin) (26pin) (27pin) (28pin)

0High High High High

1Low High High High

2High Low High High

3Low Low High High

4High High Low High

5Low High Low High

6High Low Low High

7Low Low Low High

8High High High Low

9Low High High Low

3) Fan speed

Operation FAN1 (58pin) FAN2 (59pin)

Stop Low High/Low

Low speed High High

High speed High Low

KAC-PS521/X521

CIRCUIT DESCRIPTION

AD-I

D309 (2/2)

IC9 (1/2)

IC9

AMP RECT

MPU AD-PORT

OUTPUT VOLTAGE

DETECTION

LEVEL

10u35

270

10K

15K

0.01 0.01

10K 1

13K

470

10K

Q301

Q303

Q305

Q307

to H/U

H/U GND

CONSTANT

CURRENT AMP

GND

from

MPU

3421

47 47

REQC

H/U-GND

100K

12K

1.5K

20K

IC3

J4 D302

D301

to OTHER AMP

RECEIVE

TRANSMISSON

to MPU

TRANSMISSON

RECEIVE

BOTH DIRECTION

BUFFER

4.3K

270

11 8

10u25

10K

1.8K

VCCSX

GND

TX TY

RY 6

CLK

DATA

No. Item Alignment Point Method Align For Note Fig.

1IDEL CURRENT VR1 (Lch) Connect a DC voltmeter between 2.5mV After Power on PC board

VR2 (Rch) check land A, B. 2 minutes (X09-576)

ADJUSTMENT

●Current detection circuit

Amplify and rectify potential differences at

two points in the primary-side current circuit

and send it to the AD-port of the MPU and

obtain data for displaying current value.

●Constant current output circuit

Remove troubles caused by the potential

differences between the constant current

output and the GND, so that the GND po-

tential differences between the H/U and the

AMP is not overlapped in the AMP to H/U

communication.

●I2C buffer

Using an IC for I2C communication, be-

tween-AMP communication is conducted so

that there will be no trouble from GND po-

tential differences.

KAC-PS521/X521

ABCDE

PC BOARD (COMPONENT SIDE VIEW)

R17

R55

R23

R24

C48

R78

R79 R69

R70

C49

C38

R34

R38 R18

R56

R110

R31

R29

C23

C35

C34

R45

R46

C33 R41

R42

R43

R44

C28

R25

R26

C21 R27

R28

C75

C27

R32

C22 C24

R30

R72

C74

R52

R74

R76

C73

R73

R77

R111

R109

R112

R107

R108

R104

R115

R106

R105

R101

R102

R103

C101 C102

C103

R114

C104

R11

R12

R21

R19

C29

C37

C30

R20

R10

C41

C42

C43

C44

C45

C40

C13

R22

R16

R14

R15

R33

C65

C12

R63

R64

C66

R65

C63

R39

R40

C64

R66

C11

C107

122

114

14 8

16 1

33 48

200Hz50Hz

5V 200mV

124

50Hz

200Hz

R13

R116

C105

C61

C10

C15

C16

C17

C18

C19

C20

C25

C26

C31

C32

C39

C67 C68

R117

LOW PASS

STMONO

OFFON

ON OFF

LPFOFF

INPUT SENS

HPF

HI PASS

ANP CONT I.S.F

503C 503C 103A

VR1

VR3 VR2

CN1

CN2

ED1

WH2

IC6

IC5

IC7

IC4

IC3

IC1

PREAMPLIFIER UNIT X08-4150-10 (J76-0010-12)

Refer to the schematic diagram for the values of resistors and capacitors.

X08-4150-10

Ref. No. Address

IC1 2D

IC3 6D

IC4 6D

IC5 6C

IC6 6D

IC7 4B

KAC-PS521/X521

JIHGF

PC BOARD (FOIL SIDE VIEW)

TP183

TP42

TP35

TP5

TP4

TP15

TP8

TP19

TP1

TP2

TP3

TP6

TP7

TP9

TP10

TP11

TP12 TP13

TP14

TP16

TP17

TP18

TP20

TP21

TP22

TP23

TP25

TP27

TP28

TP29

TP30

TP31

TP32

TP36

TP37

TP38

TP39

TP40

TP41

TP43

TP44

TP45

TP46

TP47 TP48

TP49 TP50

TP51 TP52

TP53

TP54

TP55

TP56

TP59

TP60

TP61

TP62

TP63

TP64

TP65

TP66

TP67

TP68

TP69

TP70

TP71

TP72

TP73

TP74

TP75

TP76

TP78

TP88

TP89

TP90

TP91

TP92

TP93

TP94 TP98

TP99

TP100

TP101

TP102

TP103

TP104

TP105

TP106

TP107

TP108

TP109

TP110

TP111

TP112

TP113

TP114

TP115

TP116

TP117

TP118

TP119

TP120

TP121

TP122

TP123

TP124

TP125

TP126

TP127

TP128 TP129

TP130

TP132

TP180

TP181

TP182

TP189

TP186

TP188

TP185

TP184

TP187

TP192

TP193

PEAMPLIFIER UNIT X08-4150-10 (J76-0010-12)

Refer to the schematic diagram for the values of resistors and capacitors.

KAC-PS521/X521

KLMNO

PC BOARD (FOIL SIDEVIEW)

BE BE

BEBE

BE BE

BEBE BE BE BE

BE BE BE

BE BEBE

BEBE

BE BE BE

C98

R113

R114

R174

R185

R186

R203

R348

R349

C402

R402

R424

R998

R85

R350

R117

R118

R184

R442

R77

R80

R86

R241

R341

R52

R74

C71

C307

R194

R323

R328

R329

R342R344

R401

R427

R428

R429

R431

R432

R433

TH3

TH4

C142

C343

C353

C354

C406

C451

C452

C453

C23

R15

R16

R23

R76

R83

R84

R175

R177

R265R262

R271R268

R266

R263

R272

R269

R178 R179

R180 R181

R188

R196

R306

12 13

R313

R324

R352

R423

R434

W602

R477

R478

R479

R480

C11

C12

C13

C14

C21

C105

C106

C125

C127

R10

R11

R12

R13

R14

R17

R18

R21

R22

R79

R81

R82

R101

R102

R103

R104

R249

R275

R277

R273

R278

R276

R274

R247

R248

R245

R246

R250

R107

R108

R109

R110

R111

R112

R115

R116

R139

R141

R143

R147

R176

R182 R183

R187

R189

R190

R191

R192

R193

R195

R303

R304

R308

R309

R311

R315

R317

R347

R351

R353

R354

R355

R356

R357

R421

R422

R425

R426

R430

R443

R444

R450

TP2 TP21

TP1

TP3

TP5 TP11

TP13

TP7

TP9

TP4

TP6

TP8

TP10

TP12

TP14

TP16

TP18

TP20

TP22

R451

R452

R453

R454

R455

R458

R459

R460

R418

R419

W556

W562

W547

W563

W612

W603

W543

R305

C24

W551

W558

W542 W534

W555

W560

W570

W557

R264R261

R270R267

W548

W553

W531 W526

W522

W545

W525

W540

W538

W529

W527

W611

C460

W549

W521

W530

C461

R99

C405

W523

W532

W541

R98

W537

R97

W564

W561

W565

R100

C306

W554

W536

W605

W518

W539

C311

W604

W524

W519

W544

W550

W528

R360

W520

C303

R327

W573

TP38

TP37

TP36

TP35

TP34

TP33

TP32

TP31

TP40

TP39

W609

W614

W615

R420

W569

W606

C304

W607

W608

C302

C454

W610

C99

C100

W613

R96

R95

C97

W571

C404

W572

W617

W552

W616

W566

5885

IN LCHRCH

OUT

W253

W261

TP19

TP17

TP15

C18

TP24

TP27

TP26

TP23

TP25

C138

W92

C401

C109

C110

C70

C17

C19

C69

C91

C103

C104

C111

C112

C137

C139

C140

C145

C146

C301

C349

C350

C351

C352

C358

C403

R105

R106

W90

W80

W89

C15 C16

C101 C102

C107

C108

C115

C116

C117

C118

C119

C120

C121

C122

C123

C124

C129

C130

C131

C132

C133

C135

C141

R119

R120

R121

R122

R123

R124

R125

R126

R127

R128

R129

R130

R131

R132

R133

R134

R135

R136

R137

R138

R145

R146

R151 R152

R153

Lch

R154

R155 R157

R158

R159

R160

R161 R163

R165 R166

R167 R168

R169 R171

R173

R201

R202

R301

R302

R318

R319

R320

R321

R322

R334

R335

R345

W404

W58

W62

W61

W60

W59

W165

W257

W254

211

222

W213

W212

W219

W78

W88

W82

W74

W161

W141

W76

W168

W145

W46

W127

W117

W137

W183

W188

W190

W176

W170

W166

W178

W223

W255

W256

W83

W67

W68

W70

W53

W227

W228 W229

W230

W124

W94

W52

W185

W208

W209

W207

W173 W152

W150 W142

W63

W151

W175

W172

W196

W129

W64

W241

W232

W128

W42

W116

W91

W111

W99

W95

W236

W133

W163

W138

W98

W104

W221

W123

W126

W130

W107

W140

W231

W156

W158

W164

W160

W143

W177

W174

W167

W153

C74

W147

W103

W119

W110

W115

W234

W131

W220

W206

W195

W189

W191

W194

W204

W205

W203

W202

W201

W93

W260

W226

W199

W192

W215

W218

W181

W258

W233

W235

W237

W193

W243

W248

W246

W244

W238

W239

W247

W252

W251

W224

W197

W214

W159

W157

W198

W216

W154

W146

W155

W171

W250

W249

W41

W210 W113

W148

W211 W149

W179

Lch

Rch

W180

W187 W162 W135

W136

W72

W112

W56

W77 W54

W71

W101

W182

W184

W186

W105

W106

W242

W57

W65

W55

W66

W73

W108

W125

W122

W118

W114

W109

W102

W85

W245

W121

W132

W84

W69

W97

W86

W75

W87

W100 W96

W79

W81

W217

W222

W43

W200

W169

W225

C76

EB EB EB E B EBEB

EB BE

Q349

D131

D258

D259

D260

Q97

Q351

Q354

Q357

Q69

Q352

D132

D301

D303

D312

D351

D353

D354

Q50

Q68

Q70

Q71

Q101

Q247 Q249

Q245

Q250 Q248

Q102

Q246

Q149

Q348

Q353

Q355

D55

D70

D103

D255 D256

D257

D133

D302

D304

D305

D315

D341

D342

D343

D344

D352

Q111

Q112

Q141

Q261

Q262

Q263

Q142

Q143

Q144

Q145

Q346

Q347

D317

D318

D319

D311

Q356 Q358

D108

Q66

Q147

D71

D105

D106

D107

D109

D110

D111

D112

D113

D115

D117

D127

D128

D129

D130

Q103 Q104

Q105 Q106

Q107

Q108

Q109

Q110

Q113 Q114

Q115 Q116

Q117

Q118

Q119

Q121

Q123

Q125 Q126

Q127

Q128

Q129

Q131

Q133 Q134

Q135 Q136

Q137 Q139

Q146

Q403

Q404

D54

CN10

IC1

IC10

IC6

IC7

IC5

IC8

IC3

AUDIO UNIT X09-5760-10 A/2 (J76-0013-11)

DC voltmeter

2.5mV

DC voltmeter

2.5mV

VR2

VR1

Refer to the schematic diagram for the values of resistors and capacitors.

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