KENWOOD KTC-SR901 Service Manual

KENWOOD KTC-SR901 Service Manual
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Service Manual for KENWOOD KTC-SR901, downloadable as a PDF file.

We also have owner's manual to this model.

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Sample pages

B51-7925-00 (N) 1474

SIRIUS SATELLITE RADIO TUNER

KTC-SR901

SERVICE MANUAL

Cord with plug

(E30-4138-05)

Metallic cabinet

(A01-2786-02)

Screw set

(N99-1623-05)

Accessory

(W01-0744-05)

Magic tape

(H30-0051-05)

Mounting hardware

(J21-3801-04)

B51-7925-00 (N) 1474

SIRIUS SATELLITE RADIO TUNER

KTC-SR901

SERVICE MANUAL

Cord with plug

(E30-4138-05)

Metallic cabinet

(A01-2786-02)

Screw set

(N99-1623-05)

Accessory

(W01-0744-05)

Magic tape

(H30-0051-05)

Mounting hardware

(J21-3801-04)

KTC-SR901

BLOCK DIAGRAM

60MHz

8.192MHz

DATA

AUDIO

ANTENNA DETECT

POWER SUPPLY BLOCK

F/E

A/D

IC2

IC3

(OPTION)

ANTENNA

COFDM

IC4

TDMRC

IC6

CDC

IC7

SDRAM

IC5

SRAM

IC8

IC9

DAP

SRAM

IC11

FLASH

IC10

ROM

D/A

IC23

BUFFER

IC30

IC1

u-COM

SW.

IC24

IC25

ISO-

IC34

AMP

to H/U

to CD-CH

Q10

IC15

IC12

IC16

Q3,IC13

Q12,IC17

Q13,IC18

IC22

IC35

IC19

IC14

AUDIO 8V

BIAS

DAC 5V

ADC 5V

ANTENNA 8V

DIG 3.3V

DIG 5V

F/E 3.3V

DIG 2.5V

B.U. 5V

DIG GND

ADC GND

DAC GND

AUDIO GND

RECEIVE SIGNAL

CLOCK

CONTROL

COMPONENTS DESCRIPTION

q electric unit (X14-6900-10)

Ref.No.

Element/Function

Operation/Condition

IC1

µ-com

IC2

AD converter

Analog to digital converter from A1 (tuner module)

IC3

Digital downconverter

Downconvert to baseband, de-mapping, timing correction

IC4

FFT, De-modulator

FFT, de-modulate, frequency correction for COFDM signal

IC5

128M SDRAM

For 4 seconds-delay

IC6

De-modulator, Combiner

De-modulate, correction for TDM signals, and combining of three signals

IC7

De-interleaver, Decoder

De-interleaver, viterbi/reed-solomon decode and channel selection

IC8

4M SRAM

For de-interleaver

IC9

Audio-decoder,

Audio decode, data decode and other agere's ic's system control,

System controller

and has a ESN code

IC10

16M Flash memory

Boot ROM for IC9 and has a ESN code

KTC-SR901

COMPONENTS DESCRIPTION

Ref.No.

Element/Function

Operation/Condition

IC11

1M SRAM

External RAM for IC9

IC12

8V Regulator

Power supply for audio system

IC13

AVR

Power supply for antenna

IC14

3.3V Regulator

Power supply for A1 (tuner module)

IC15

5V Regulator

Power supply for D/A converter (IC23)

IC16

5V Regulator

Power supply for A/D converter (IC2)

IC17

DC/DC Converter

Power supply for digital 3.3V

IC18

DC/DC Converter

Power supply for digital 5V

IC19

2.5V Regulator

Power supply for digital 2.5V

IC22

Op-amp

Convert for audio bias circuit

IC23

D/A Converter

Audio D/A converter (I2S)

IC24

SW Op-amp

SW op-amp and LPF system for 2 audio signals

IC25

Op-amp

Audio isolate with CD-CH

IC30

3-state buffer

3.3V / 5V signal level converter

IC31

Reset ic

IC32

EEPROM

Memory

IC33

Comparator

For BU detect

IC34

Comparator

For antenna detect

IC35

5V Regulator

Power supply for BU 5V

Q1, 2

For audio power supply SW

AVR

For antenna 8V power supply

Q10, 11

For power supply SW

Q12

DC/DC Converter

For digital 3.3V power supply

Q13

DC/DC Converter

For digital 5V power supply

Q14

For audio out source select

On ; CD-CH / Off ; Sirius

Q15

For mute

On ; Mute

Q17

Mute

For left mute

Q18

Mute

Forright mute

Q19

Inverter

For reset

Q21

Inverter

For 5L ch-con signal

Q50

For B.U detect

On ; Detect

Q51

For B.U detect mute

On ; Mute

D1, 5

Diode

Protect for wrong connection

D10, 11

Schottky barrier diode

For DC/DC converter

D19

Diode

For reset

D20

Diode

For AVR

D21, 22

Diode

Protect for irregularly voltage input

D23

Diode

Divider for left and right mute circuit

D24, 25

OR gate

For mute

D30

Rectifier diode

For reset signal

D35, 36

Zenner diode

Protect for irregularly voltage input

D37

OR gate

For mute

D38

Diode

Divider for reset signal

D39-43

Zenner diode

Protect for irregularly voltage input

D44

Diode

Reference voltage for regulator

D45

Rectifier diode

For B.U 5V

D46

Diode

Protect for wrong connection

D47

Zenner diode

Reference voltage for mute circuit

D50, 51

Zenner diode

For B.U voltage detect

KTC-SR901

MICROCOMPUTER'S TERMINAL DESCRIPTION

q X14-6900-10

Pin No.

I/O

Pin name

Description

Processing Operation

DATAH2

5L I/F to CD_CH

HCLK2

5L I/F to CD_CH

3-5

Not connect

EVDD

Power supply for port

EVSS

Ground for port

8, 9

Not connect

MUTE1

5L I/F to H/U

REQC1

5L I/F to H/U

MDI

Data input from IC9 (via IC30)

MDO

Data output to IC9 (via IC30)

SCK

Data clock output to IC9 (via IC30)

REQH2

5L I/F to CD_CH

CHCON2

5L I/F to CD_CH

A_MUTE

Audio mute output

H ; Normal (off) / L ; Mute on

IC/VPP

For write program enable

H ; Write mode / L ; Normal

RELAY

Audio source selection

H ; CD-CH / L ; Sirius

Not connect

PON_M

Output for power on main

H ; Power on / L ; Power off

PON_A

Output for power on audio

H ; Power on / L ; Power off

23, 24

Not connect

DAP_RST

IC9 reset output

H ; Normal (off) / L ; Reset

SSN

Enable signal output to IC9 (via IC30)

27-30

Not connect

RESET

H ; Normal (off) / L ; Reset

Not connect

33, 34

Not connect

Crystal for main clock

VSS

Ground

VDD

Power supply

39-54

Not connect

BVDD

Power supply for BUS interface

BVSS

Ground for BUS interface

57-70

Not connect

AVDD

Analog power supply

AVSS

Analog ground

AVREF

Analog reference voltage

ANTENNNA

Connected to antennna detection signal

H ; Normal (detect) / L ; Not detect

TA_MODE

Test mode

H ; Test mode / L ; Nomal mode

76-85

Not connect

BUP

Back-up voltage detect

H ; Not detect / L ; Detect (normal)

REQH1

5L I/F from H/U

CHCON1/STBY

5L I/F from H/U

REQC2

5L I/F from CD_CH

Not connect

SSR_BU

Back-up voltage detect

H ; Detect (normal) / L ; Not detect

93-96

Not connect

DATAH1

5L I/F from H/U

DATAC1

5L I/F to H/U

HCLK1

5L I/F from H/U

100

DATAC2

5L I/F from CD_CH

PC BOARD (COMPONENT SIDE VIEW)

PC BOARD (FOIL SIDE VIEW)

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

C156

C165

C164

C169

C159

C143

C158

C151

C132

C149

C146

C223

C154

C225

C155

C286

C150

C142

C147

C284

C287

R60

R10

R20

R16

R15

R24

R23

R22

R28

R27

C81 C82

C79

C80

C83

C87

C88

C85

C86

C78

C71

C72

C67

C70

C73

C76

C77

C74

C89

C99

C92

C93

C90

C91

C94

C97

C98

C96

C37

C38

C24

C36

C34

C27

C26

C29

C30

C60

C61

C58

C59

C62

C65

C66

C63

C64

C57

C50

C51

C52

C56

C53

C54

C10

C12

C21

C168

C23

C144

C148

C22

C153

C253

C256

C194

C181

C197

C196

R132

R133

R130

R121

L20

R125

C236

C237

C235

C239

R141

R140

R150

R151

R75

R76

R74

R72

R73

R82

R71

R46

R44

R45

R70

R96

R89

R90

R110

R34

R40

R30

R31

C102

C103

C100

C101

C104

C107

C108

C105

C106

C172

C174

C175

C177

C123

C119

C127

C128

C126

C124

C125

C112

C113

C111

C109

C110

C117

C116

L49

R209

R203

L50

C171

C170

C173

CP7

R152

CP8

C214

R47

C184

C162

C224

R190

R189

C301

C40

C296

L12

L13

L51

C161

C167

C295

C238

R185

C240

R210

L45

L44

R204

R205

R206

R208

R207

R213

R212

R211

R218

R217

R216

R215

R214

100

108

109

144

100

132

133

176

100

132

133

176

VPP

RST

MDI

DIS

RST

DAP

GND

4.2V

VDD

SSN

SCK

C226

L10

C140

L11

SI SCK GND

MDO

C55

IC15

D46

D45

IC6

Q10

IC19

IC3

IC7

IC4

IC2

IC12

IC22

D37 D38

D23

D24

Q14

IC9

D41

D36

D35

D39

D20

D21

D22

IC1

Q18

Q17

D25

IC14

Q15

CN2

IC16

CN4

FUSE 3A

BATT

GND

TERR

ANT

SAT

CN1

TO HEAD UNIT

TO CHANGER

X14-6900-10 (J74-1312-12)

CN5

O G

R62

R63

C35

C152

R54

R55

C145

C227

R160

R49

R187

R57

R58

C228

R50

R51

R61

R52

R53

R17

R11

R25

R21

C75

C95

C42

C43

C41

C32

C33

C31

C44

C45

C46

C11

C14

C16

C15

C13

C17

C20

C160

C157

C163

C166

C19

C18

C141

C130

C133

C182

C137

C136

C134

C135

C252

C251

C254

C257

C255

C250

C178

C288

C204

C205

L48

L46

L47

R129

R119

R122

L21

R124

L42

R120

L41

R177

R176

R179

R178

R175

R173

R172

R174/W5

R181

R180

R183

R182

R171

R139

R149

R170

R83

R84

R80

R81

R99

R100

R98

R97

R104

R105

R103

R101

R102

R95

R88

R87

R85

R86

R94

R92

R91

R43

R115

R116

R118

R117

R107

R106

R109

R37

R33

R41

R42

R38

R39

R32

R184

C185

C186

C189

C190

C187

C188

C180

C212

C213

C210

C217

C222

C220

C221

C195

C192

C193

C202

C203

C200

C201

C122

C121

C120

C118

C114

C115

CP1

C183

C199

C198

C216

C218

C230

C231

R186

C266

C269

C267

C268

C265

C263

C262

C261

C260

C264

C129

C139

C138

C176

R201

C300

R200

R56

C289

R191

R59

R188

C39

C297

C298

R202

C207

C206

C209

C208

C241

C290

C291

C294

C293

C292

C131

L43

C191

C211

+5V

FRAME

RST

MUTE

STBY

SDAT

SCLK

MCLK

LRCLK

Rch

AGND

BUSRST

RATE

UART

DGND

MDI

MDO

SSN

DIS

SCK

4.2V

DGND

DAPRST

Lch

D11

D10

Q13

D44

IC13

IC35

IC24

Q12

IC17

IC18

Q11

IC25

D30

Q21

Q19/D19

IC23

IC31

D42

D43

D40

IC32

IC30

IC34

IC33

IC10

IC11

D50

D51

Q50

D47

Q51

IC5

IC8

X14-6900-10 (J74-1312-12)

Ref. No

address

Ref. No

address

IC1

IC2

Q10

IC3

Q14

IC4

Q15

IC6

Q17

IC7

Q18

IC9

IC14

IC12

IC15

IC16

IC19

IC22

X14-6900-10

Ref. No

address

Ref. No

address

IC5

IC8

IC10

Q11

IC11

Q12

IC13

Q13

IC17

Q19

IC18

Q21

IC24

Q51

IC23

Q50

IC25

IC30

IC31

IC32

IC33

IC34

IC35

X14-6900-10

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