Kenwood KDSP-900 Service manual

2000-12 PRINTED IN JAPAN

B51-7713-00 (N)3381

DVD SURROUND PROCESSOR

KDS-P900

SERVICE MANUAL

-C H

igital S

igna

l P

ces

sor

DIGITAL

Metallic cabinet (A01-2742-01)

Cord with plug (E30-4740-05)

Magic tape (H30-0051-05)

Screw set (N99-1558-05)

Cord with connector (E30-4938-05)

Mounting hardware (J21-3801-04) x2

KDS-P900

BLOCK DIAGRAM

A8V AVR M5237ML

A5V AVR

BA178M05T

LM2595S-ADJ

D3.3V AVR

2SB1184

SW9V

MC033063AD

-9V

B.U5V

2SB1565

CDTI

CCLK

CDT0

ERF CS

DIR

DSP

CLK

RST

SI S0

IERX IETX

IEON

HA12187FP

MZ-BUS DRIVER

CLK DATA SEL

EVOL

SYSTEM u-COM 703035AGC-XXX

B.U DET

MZ-BUS CN

SEL

TDA7501

EVOL +6dB

INPUT GAIN

BA3121F

ISO

AV IN

(+4.6dB)

BUFF

NJM4565M-TE2

AK5353VT

A/D

AK4112A

DIR

D IN

DSP56362PV200

DSP 6ch D/A

AK4356VQ

L.P.F

NJM4565M-TE2

(-6.5dB)

(CD IN) +3dB

2ZONE

VOL

ANALOG : +2dB

DIGITAL : 0dB

2ZONE : 0dB

NJM4565M-TE2

BUFF

(-3dB)

MUTE

NJM4565M-TE2

PRE AMP

(9.1dB)

(9.1dB+15dB)

NJM4565M-TE2

PRE AMP

PRE OUT

A8V

A5V

D3.3V

SW9V

SW-9V

B.U5V

PON

SYS ON

RESET

MUTE

BUDET

B.U5V

DAPD

B.U5V

BUS+

B.U

GND

MUTE

BUS ON

RESET

BUS-

REAR OUT

FRONT OUT

AUDIO I/O

CD IN

A8V

A5V A5V

D3.3V

D3.3V A5V

A8V

CASS IN

A OUT

RR RL FR FL CENTER SUB

SW9V,

FRONT L,R REAR L,R

SW9V,-9V

CENTER

SUB

FR FL

RR RL

SW9V,-9V

SW9V

A8V

-9V

AM : 200mV

FM,TV : 600mV

CD, MD,DVD,CH : 1200mV

ANALOG

AV : 920mV

AV : 800mV

FM,TV : 400mV

CD, MD,DVD,CH : 800mV

ANALOG

AM : 135mV

FM,TV : 720mV

CD,MD,DVD,CH,SUB : 240mV

CD, MD,DVD,CH : 1400mV

ANALOG

AM : 240mV

DIGITAL

CD,DVD,CH : 1840mV

AV : 1400mV

CD,MD,DVD,CH,SUB : 120mV

AV : 680mV

CD,DVD,CH : 865mV

FM,TV : 340mV

AM : 110mV

DIGITAL

CD, MD,DVD,CH : 680mV

ANALOG

AM : 750mV

CD,MD,DVD,CH : 4500mV

AV : 4500mV

DIGITAL

FM,TV : 2250mV

CD,MD,DVD,CH,SUB : 4500mV

CD, MD,DVD,CH : 4500mV

ANALOG

AM : 285mV

CD,MD,DVD,CH : 1700mV

AV : 1700mV

DIGITAL

FM,TV : 850mV

CD,MD,DVD,CH,SUB : 300mV

CD, MD,DVD,CH : 1700mV

ANALOG

CD, MD,DVD,CH : 480mV

FM,TV : 240mV

ANALOG

AM : 80mV AV : 480mV

AM : 200mV

CD,MD,DVD,CH : 1200mV

AV : 1200mV

FM,TV : 600mV

CD, MD,DVD,CH : 1200mV

DIGITAL

ANALOG

KDS-P900

COMPONENTS DESCRIPTION

Relation Between 2ZONE MUTE Terminals

MUTE_F Terminal MUTE_R Terminal

MUTE Terminal

2zone ON

Lo output Hi output

Hi: MUTE ON

[Speaker Select NORMAL] (Muting enabled for Front speakers)

2zone ON

Hi output Lo output

Hi: MUTE ON

[Speaker Select REVERSE] (Muting enabled for Rear speakers)

2zone OFF Lo output Lo output

Hi: MUTE ON

(Muting enabled for Front/R

Ref.

Purpose, Function

Operation, Condition, Compatibility

PROCESSOR UNIT (X32-4980-00)

IC1 System microcomputer IC2 DSP IC IC3 DIR IC4 A/D converter Analog-to-digital conversion. IC5 E-VOL IC6 D/A converter Digital-to-analog conversion. IC7

Inverter for DSP IC's oscillator IC8 Isolation IC Isolation IC for AUDIO IN. IC9 Switching regulator DIGITAL 3.3 V AVR.

IC10 Power supply IC Preamp (for -9 V).

IC12 Reset IC

Executes resetting at below

4.2 V (Output L). IC13 BUS IC Bus communication IC. IC14 Power supply IC AVR for AUDIO 5 V. IC15 Power supply IC IC16 SRAM for DSP IC IC17 SRAM for DSP IC IC18 ROM for dts IC19 Opamp Opamp for reference voltage output.

IC20- 22

Opamp D/A converter output LPF.

IC23- 25

Opamp Opamp for Pre-Out output.

IC26 Muting logic circuit 2-input NOR (x 2).

IC28, 29

Opamp Bus audio output buffer. IC30 Opamp A/D converter input buffer. IC31 Muting logic circuit 2-input NOR (x 2). IC32 Muting logic circuit 2-input AND.

Q1-3 Preamp (+9 V) SW

Supplies +9 V when the bases of Q1and Q3 are "H" and the base of Q2 is "L".

Q4- 6 Preamp (-9 V) SW

Supplies -9 V when the bases of Q4 and Q6 are "L" and the base of Q5 is "H".

Q7, 8 Preamp (+9 V) AVR Turns ON when the base of Q7 is "H".

Ref.

Purpose, Function

Operation, Condition, Compatibility

Q9, 10

Preamp (+9 V) SW Turns ON when the base of Q10 is "H".

Q11, 12

AUDIO +B AVR Turns ON when pin 2 of Q12 is "H".

Q13, 14

AUDIO 5 V SW Turns ON when pin 2 of Q17 is "H". Q16 DIGITAL 3.3 V SW Turns ON when the base is "H". Q17 AUDIO 5 V SW Turns ON when pin 2 of Q17 is "H".

Q18, 19

B.U. 5 V AVR Turns ON when the base of Q18 is "H".

Q101 P-ON 5 V Turns ON when the base is "L".

Q103

System ON/OFF request SW

Turns ON and sends the System ON request when the base is "H".

Q104 Back-Up detection SW

Turns ON when Back-Up is "H", OFF

when power down is detected. Q105 Reset SW Executes resetting when the base is"H". Q106 IC26 muting SW

Turns ON to apply muting when the base is"L". Q107

BUS MUTE inversion SW

Turns ON when BUSMUTE is "H". Q201 FET 5 V:3.3 V level shifting FET. Q202 FET 5 V:3.3 V level shifting FET. Q204 FET 5 V:3.3 V level shifting FET. Q301 E-VOL muting SW

Turns ON to apply muting when the base is "H". Q499 PRE-OUT muting SW

Turns ON to mute CENTER/SUB when pin 2is"H". Q500 PRE-OUT muting SW

Turns ON to mute FR/FL when pin 2 is "H". Q501 PRE-OUT muting SW

Turns ON to mute RR/RL when pin 2 is "H".

Q502 PRE-OUT muting SW

Turns ON to mute CENTER when pin 2

of Q499 is "H".

Q503 PRE-OUT muting SW

Turns ON to mute SUB when pin 2 of

Q499 is "H". Q504 PRE-OUT muting SW

Turns ON to mute FR when pin 2 of Q500 is"H". Q505 PRE-OUT muting SW

Turns ON to mute FL when pin 2 of Q500 is "H".

Q506 PRE-OUT muting SW

Turns ON to mute RR when pin 2 of

Q501 is "H".

Q507 PRE-OUT muting SW

Turns ON to mute RL when pin 2 of

Q500 is "H".

KDS-P900

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin Pin Name I /O Purpose Processing Operation

Processing During

Non-Operation

System Microcomputer 703035AGC-015 : IC1 (X32-4980-00)

1 DIR_CS O DIR (AK4112A) chip select.

L: DIR communication permitted. H

2 MUTE_F O FRONT muting enable terminal.

L: 2-zone main source

(when 2ZONE is OFF). H

H: 2-zone sub source. 3 DIR CDTI I DIR (AK4112A) DATA input terminal. DIR data input. Input 4 DIR CDTO O DIR (AK4112A) DATA output terminal. DIR data output.

Last status held 5 DIR CCLK O DIR (AK4112A) CLOCK output terminal. DIR communication clock output. H 6 Evdd -

Positive power supply terminal for function-sharing terminals.

Positive power supply. -

7 Evss - GND terminal for function-sharing terminals. GND potential. -

8-11 NC O Not used. Open (Output fixed at Low). L

12 DSP_SI I DSP (DSP56362) DATA input terminal. DSP data input 13 DSP_SO O DSP (DSP56362) DATA output terminal. DSP data output.

Last status held

14 DSP_CLK O DSP (DSP56362) CLOCK output terminal. DSP communication clock output. L 15 DSP_SS O

DSP (DSP56362) Communication Permission output terminal.

L: Start of communication permitted.

16 DSP_RST O (DSP56362) RESET output terminal. L: DSP Reset. H 17 NC O Not used. Open (Output fixed at Low). L 18 IC/Vpp - IConnected directly to Vss. Internally connected terminal. 19 DA_PD O D/A converter Power Down SW. L: Power Down. H 20 P_ON O P-ON control output terminal. H: OFF. L: ON. Hi-Z

21,22

NC O Not used. Open (Output fixed at Low). L 23 IERX I IE bus input. IE bus input. 24 IETX O IE bus output. IE bus output. L

25,26

NC O Not used. Open (Output fixed at Low). L 27 IE_ON O IEBUS current driver power supply terminal.

L: STBY. H: Bus communication permitted.

28 MUTE O MUTE control terminal. L: OFF. H: ON. L

29,30

NC O Not used. Open (Output fixed at Low). L 31 RESET I System reset input L: Reset. → H: Start of operation. 32 XT1 I Sub system clock oscillation terminal. Open. 33 XT2 - Sub system clock oscillation terminal. Open. 34 REGC I Regulator oscillator connection terminal.

Connection of an electrolytic capacitor (1 uF).

35 X2 - Main system clock oscillation terminal (12.58 MHz). System clock oscillation terminal. 36 X1 I Main system clock oscillation terminal (12.58 MHz). System clock oscillation terminal. 37 Vss - GND potential. GND potential. 38 Vdd - 5 V potential. 5 V potential. 39 CLKOUT O

Internal system clock output terminal.

40-54

NC O Not used. Open (out fixed at Low). L

55 BVdd -

Positive power supply for bus interfacing.

56 BVss - GND for bus interfacing. -

57-69

NC O Not used. Open (Output fixed at Low). L 70 REF_CON O A/D port reference voltage control terminal. A/D reference voltage control. 71 Avdd - A/D power supply. 72 Avss - A/D GND potential. 73 Avref I A/D port reference voltage input. A/D reference voltage input. -

74-85

NC I Not used Connected to GND potential. 86 NC O Not used Open (Output fixed at Low). L

87 BU_DET I Back-Up detection terminal.

L: Back-Up ON detection. Open (Output fixed at Low).

Detection voltage: 8.12 - 8.42 V. 88 NC O Not used. Open (Output fixed at Low). L 89 SYS_REQ I K-Bus ON request detection terminal. L: System ON request detected. Input

90,91

NC O Not used. Open (Output fixed at Low). L 92 DIR_ERF I DIR digital data error input terminal. L: Normal. H: Error. 93 NC O Not used. Open (Output fixed at Low). L 94

EVOL_SEL

O E-VOL (A354) selector output terminal. L: Communication permitted. H

EVOL_DATA

O E-VOL (A354) DATA output terminal. Electronic Volume data output.

Last status held

EVOL_CLK

O E-VOL (A354) CLOCK output terminal.

Electronic Volume communication

clock output.

97-99

NC O Not used. Open (Output fixed at Low). L

100 MUTE_R O Rear muting enable terminal.

L: 2-zone main source (when 2ZONE is OFF). H H: 2-zone sub source.

A B C D E F G H I J

R34

R13

R11

R25R24

R30

R31

C520

C515

C20

C24

C523

C504

C507

C512

R10

R33

C101

R330

R328 R329

R122

R327

R325

R345

R213

R332

R131

L65

L1 R408

R405

R324

R322 R323

R14

R114

R115

R132

R116

R326

R104

R331

R521

R520

C217

R518

R517

C204

C203

C216

C210

C215

R523

C221

C322

C323

C321

C320

C327

C328

R510

R514

R515

C302

C208

R511

C316

C228

R534

R535

C32

C27

R532

R531

R542

R541

C14

R537

R539

C206

R527

C317

C214

C212

R525

C226

R528

C52

C107

C329

R333

R356

R334

R336

R335

R352

R321

R353

R355

R354

R342

R341

R343

R344

R338

R337

R339 R340

R302

R301

R304

R347

R346

R218

R350

R349

R351

R348

R307

R308

R401

C332

C333

C351

R504

C338

C334

C344

C345

C343

R508

C349

C350

R506

R505

C410

C407

R402

R403

R404

R431

C339

C340

R438

R434

R435

R220

R221

R222

C218

C205

R36

R35

C237

R141

R143

C103

C227

C233

C501

C506

C514

C112

R144

C22

R101

EBE

BEB E

4 3

Q105

Q301

Q106

Q16

D104

D202

D201

D102

Q505

Q504

Q507

Q506

Q503

Q101

Q502

IC32

D401

D10

Q107

D105

D203

D204

D205

IC12

D107

D11

L63

L64

C305

C306

R12

L101

R32

C521

C505

C513

R411

R410

C95

L69

C94

R409

R406

R407

R128

R130

R120

R123

R125

R124

R129

R211

R206

R207

R209

R210

R202

R204

R205

R201

R203

R28

R29

R102

R140

R26

R142

R112

R214

R109

C224

R516

R519

C229

C230

C223

C219

C220

C326

R513

C313

R522

R509

R512

R529

R533

R536

R530

R543

R538

R540

R526

R524

C202C201

C111

C106

C419

R303

R219

R309

R310

R503

C337

R499

R507

R502

C348

C416

R432

R433

R437

R436

CP25

CP24

CP28

CP27

CP23

CP1

CP22

CP2

CP32

CP33

CP34

CP29

CP30

CP31

CP4

CP3

CP21

C102

CP26

R305

R306

C528

R27

CP5

R133

C108

R313

R312

R500

R501

C238

C239

R15

RR RL

SUBCE

C26

C526

C336

C352

C331

C324

C341

C315

C325

C347

C330

C346

C357C356

C401

C402

C403

C335

C353

C342

C355

C354

C314

C21

C17

C104

C209

C207

C11

C16

C213

C231

C222

C318

C303

C232

C211

C225

C404

C508

C509

C510

C420

C502

C503

C511

C519

C524

C525

C516

C517

C518

C409

C411 C412

C405

C406

C408

C418

C417

C415

C15

C51

C33

C23

C13

C25

C301

C421

C18

C234

L67

C527

C110

C308

C307

C310

C309

C312

C311

C304

L68

C423

C422

C424

C12

C235

C236

S G

SDG

BEE

EEB

GOI

BEE

100

144

73 108

109

111

11 14 15 18

110

IC8

IC15

Q104

Q13

Q103

Q18

D103

D501

D502

D503

IC10

IC22

IC20

IC13

IC28

IC29

IC30

IC25

IC21

IC23

IC24

Q17

IC9

IC4

Q499

IC31

IC5

IC7

IC3

IC2

IC1

IC6

Q12

Q204

Q201

Q202

IC16

IC17

IC26

IC18

Q500

IC19

Q501

Q10

IC14

Q11

Q14

D301

D101

Q19

X32-4980-00

(J74-1055-22)

PC BOARD

(COMPONENT SIDE VIEW)

IC Q

16H 25E 35F 44E 54C 66D 75E 82D

94G 10 3F 12 6H 13 6H 14 3I 15 3H 16 6F 17 6G 18 5G 19 4B 20 5B 21 5D 22 5C 23 2C 24 2C 25 2D 26 5H 28 2F 29 2F 30 4D 31 5H 32 5H

13F 23F 33F 43F 53F 63F 73G 83G

93G 10 3G 11 3I 12 2I 13 4I 14 3I 16 4H 17 3I 18 6H 19 5H

101 6H 103 5H 104 5I 105 6H 106 5H 107 5H 201 4F 202 5F 204 5G 301 4C 499 2D 500 2C 501 2C 502 2C 503 2C 504 2C 505 2C 506 2D 507

X32-4980-00

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

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