Sony STR-KS370, STR-SK370 Schematic

STR-KS370

pp

SERVICE MANUAL

Ver. 1.0 2010.01

This receiver incorporates Dolby* Digital and Pro Logic Surround and the DTS** Digital Surround System. * Manufactured under license from Dolby

Laboratories. Dolby, Pro Logic, and the doubleD symbol are trademarks of Dolby Laboratories.

** Manufactured under license under U.S. Patent

#’s: 5,451,942; 5,956,674; 5,974,380; 5,978,762; 6,487,535 & other U.S. and worldwide patents issued & pending. DTS and DTS Digital Surround are registered trademarks and the DTS logos and Symbol are trademarks of DTS, Inc. © 1996-2008 DTS, Inc. All Rights Reserved.

This receiver incorporates High-Definition Multimedia Interface (HDMI HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries.

“x.v.Color” and “x.v.Color” Sony Corporation.

“BRAVIA” is a trademark of Sony Corporation.

“PlayStation” is a registered trademark of Sony Computer Entertainment Inc.

“S-AIR” and its logo are trademarks of Sony

TM

) technology.

About area codes

The area code of the receiver you purchased is shown on the upper left portion of the rear panel (see the illustration below).

4-XXX-XXX-XX(X) AA

Area code

Any differences in operation, according to the area code, are clearly indicated in the text, for example, “Models of area code AA only”.

SPEAKERS

FRONT L SUR R SUR L CENTER

FRONT R

SUBWOOFER

AUDIO POWER SPECIFICATIONS

Amplifier section

POWER OUTPUT AND TOTAL HARMONIC DISTORTION:

(FTC) (Models of area code US only) FRONT L + FRONT R

POWER OUTPUT (reference) FRONT L/FRONT R/CENTER/SUR L/SUR R

SUBWOOFER 165 W (at 3 ohms, 60 Hz)

Inputs

Analog Sensitivity: 1 V/50 kohms Digital (Coaxial) Impedance: 75 ohms

FM tuner section

Tuning range 87.5 – 108.0 MHz 

Antenna FM wire antenna Antenna terminals 75 ohms, unbalanced Intermediate frequency

AM tuner section

Tuning range

Area code Tuning scale

US 530 –

Antenna AM loop antenna Intermediate frequency

SPECIFICATIONS

With 3 ohm loads, both channels driven, from 180 – 20,000 Hz; rated 84 watts per channel minimum RMS power, with no more than 1% total harmonic distortion from 250 milliwatts to rated output.

167 W (per channel at  3 ohms, 1 kHz)

(100 kHz step)

7 MHz

10.

10 kHz step 9 kHz step

1,710 kHz

450 kHz

531 – 1,710 kHz

US Model

General

Power requirements

Area code Power requirements

US 120 V AC, 60 Hz

Power output (DIGITAL MEDIA PORT)

DC OUT: 5 V, 0.7A MAX

Power consumption

Area code Power consumption

US 110 W

Power consumption (during standby mode)

Dimensions (w/h/d) (Approx.)

Mass (A

Design and specifications are subject to change without notice.

Halogenated flame retardants are not used in the certain printed wiring boards.

0.3 W (When Control for HDMI and S-AIR standby are set to off)

17 in × 2 5/8 in × 12 1/8 in (430 mm × 66.5 mm × 306 mm) including projecting parts and controls

rox.) 7 lb 8 oz (3.4 kg)

AV RECEIVER

9-890-531-01

2010A08-1

2010.01

©

Sony Corporation

Audio & Video Business Group Published by Sony EMCS (Malaysia) PG Tec

STR-KS370

NOTES ON CHIP COMPONENT REPLACEMENT

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes.). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’ instructions to use these instruments.

2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)

To Exposed Metal Parts on Set

AC

1.5 kΩ0.15 μF

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

voltmeter (0.75 V)

SERVICING NOTES

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C. Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to ﬂ ow)

than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

STR-KS370

NOTE OF REPLACING THE IC3500 AND IC3501 ON THE HDMI PC BOARD

IC3500 and IC3501 on the HDMI PC board cannot exchange with single. When these parts on the HDMI PC board are damaged, exchange the entire mounted board.

3

STR-KS370

DISASSEMBLY

• This set can be disassembled in the order shown below.

2-1. DISASSEMBLY FLOW

SET

2-2. CASE (Page 4)

SECTION 2

2-3. S-AIR BOARD (Page 5)

2-6. MAIN BOARD (Page 6)

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

2-4. TUNER (FM/AM), IO BOARD (Page 5)

2-2. CASE

2 one screw FLAT HEAD (TP)

3

6

2-5. FRONT PANEL BLOCK (Page 6)

7 case

1 four screws

FLAT HEAD (TP)

4 Lift up the case in the direction of arrow.

5 two claws

3

2 one screw

FLAT HEAD (TP)

4

2-3. S-AIR BOARD

STR-KS370

5 SAIR board

4 connector (CN104)

3 two screws

+BV3 (3-CR)

6 card slot (SAIR)

2 one screw

+BV3 (3-CR)

1 four screws +BV3 (3-CR)

2-4. TUNER (FM/AM), IO BOARD

7 IO board

6 cushion saranet

1 wire (flat type) (9 core)

(CNS250)

4 Tuner (FM/AM)

3 two screws

+BV3 (3-CR)

5 four screws +BV3 (3-CR)

2 wire (flat type) (25 core) (CNS200)

5

STR-KS370

2-5. FRONT PANEL BLOCK

2 one screw +BV3 (3-CR)

4 claw

6 front panel block

5 three claws

1 wire (flat type) (13 core)

(CNS700)

3 three claws

4 claw

2-6. MAIN BOARD

1 wire (flat type) (19 core) (CN1007)

4 two screws +BV3 (3-CR)

6 four screws BVTP 3 x 14

7 heat sink (AMP)

4 two screws

+BV3 (3-CR)

8 MAIN board

5 two screws

+BV3 (3-CR)

3 connector (CN906)

2 connector (CN904)

6

SECTION 3

TEST MODE

STR-KS370

1. COLD RESET

All preset contents are cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair.

Procedure:

1. Press the [

2. Keeps pressing the [

] button on the set to turn the power on.

?/1

] button on the set for about ﬁ ve sec-

?/1

onds.

3. The message “CLEARED” appears, then the set turns off.

2. HOW TO ENTER THE TEST MODE

Note: The operation of the button of the following test modes is only a

remote commander.

Procedure:

1. Press the [

] button to turn the power on.

?/1

2. Press the buttons in order of [TUNER]  [RETURN]  Hold SHIFT button ([ENTER]  [0]  [1]  [0])  [SOUND FIELD +]

3. The message “TEST MENU” appears, then enter the test menu.

4. Press the [

] button to exit from the test mode.

?/1

3. PANEL TEST

3-1. Pattern check Procedure:

1. Enter the test mode menu.

2. Press the []/[] buttons to select “PANEL”, and press the [ENTER] button.

3. All segments and all LEDs turn on. Change as follows all on, test pattern 1, test pattern 2 and test pattern 3, all on in this order.

; ; ;

;

TrueHD D + EX

PL II x

TrueHD

D + EX

PL II x

D EX

PL II

NIGHT SLEEP HDMI COAX OPT TUNED ST S-AIR ECO MUTINGAACLPCM

TUNED STLPCM

DTS 96/24

-ES NEO:6

DTS -HDLBR

MSTR HI RES

DTS 96/24

-ES NEO:6

DTS -HDLBR MSTRHI RES

DTS

NEO:6

DTS -HD

MSTR

3-2. Key check Procedure:

1. Press the [VOLUME –] button, while executing pattern check.

2. The message “K0 V0” appears. “K0” value increases whenever a button on the set is pressed. However, once a button has been pressed, it is no longer taken into account. All buttons on the set is pressed, “K3 V0” is displayed.

3. “V” value increases in the manner of 0, 1, 2, 3 ... [MASTER VOLUME] knob is turned clockwise, or it decreases in the manner of 0, 9, 8, 7 ... [MASTER VOLUME] knob is turned counterclockwise.

4. Press the [

] button to exit from the test mode.

?/1

3-3. Software version and destination display Procedure:

1. Press the [VOLUME +] button, while executing pattern check.

2. The display of model name, destination, and software version changes whenever [VOLUME +] button is pressed.

3. Press the [

] button to exit from the test mode.

?/1

4. AMP TEST

Not used for the servicing. Press the [

] button if having entered this mode.

?/1

5. TUNER FACTORY PRESET

Not used for the servicing. Press the [

] button if having entered this mode.

?/1

6. VACS DISPLAY Procedure:

1. Enter the test mode menu.

2. Press the []/[] buttons to select “VACS DISP”, and press the

[ENTER] button.

3. It will appear the VACS status

7. VACS ON/OFF Procedure:

1. Enter the test mode menu.

2. Press the []/[] buttons to select “VACS ON OFF”, and press

the [ENTER] button.

3. The VACS status will change.

8. DSP HALT MODE

Not used for the servicing. Press the [

] button if having entered this mode.

?/1

9. DSP STATUS DISPLAY

Not used for the servicing. Press the [

] button if having entered this mode.

?/1

10. HDMI UCOM UPDATE Procedure:

1. Enter the test mode menu.

2. Press the []/[] buttons to select “HDMI VER”, and press the

[ENTER] button.

3. HDMI MICOM software version is displayed.

4. Press the [

] button to exit from the test mode.

?/1

11. HDMI THROUGH DMPORT UPDATE Procedure:

1. Enter the test mode menu.

2. Press the []/[] buttons to select “HDMI UPD”, and press the

[ENTER] button.

3. Connect the programming jig to dmport connection.

4. Flash HDMI software from computer through programming jig.

5. Press the [

] button to exit from the test mode.

?/1

12. DMPORT TEST

Procedure:

1. Connect the DMPORT check jig (Part No. J-2501-309-A) with the DMPORT jack (CN1701) on the MAIN board.

2. Press the [

] button to turn the power on.

?/1

3. Conﬁ rm that both LEDs of the DMPORT check jig lights. (Conﬁ rmation the power supply line)

4. Press the [DMPORT] button to select the “DMPORT”.

5. Enter the test mode menu.

6. Press the []/[] buttons to select the “DMPORT CHK”, and press the [ENTER] button.

7. The message “DMPORT OK.” appears on the ﬂ uorescent indi- cator tube and enter the digital media port test mode. (Conﬁ r- mation of communication line)

When “NO DETECT” and “UART TO” are displayed on

the ﬂ uorescent indicator tube, conﬁ rm the connection of the DMPORT check jig, and enter the mode again.

Each time the [

] button is pressed, the connect check and

>

adaptor version check are changed.

Press the [

] button, connected conﬁ rmation of the

.

DMPORT check jig is done again.

8. To a pin-jack of the DMPORT check jig input information relevant to audio signal (sine-wave 1.0 Vrms).

9. Conﬁ rm the output of speakers. (Conﬁ rmation of analog sig- nal)

7

STR-KS370

10. Press the [

AF

oscillator

] button to exit from the test mode.

?/1

MAIN board

J001

DMPORT

check jig

(Part No.

J-2501-309-A)

CN1701

amplifier

MAIN board

TB2001, 2002

FL/FR speakers

13. DMPORT DEVICE TEST

Note: It connects with the iPod adaptor and it is necessary to repair hard-

ness to execute this mode.

Procedure:

1. Connect the DMPORT check jig (Part No. J-2501-309-A) with the DMPORT jack (CN1701) on the MAIN board.

2. Enter the test mode menu.

3. Press the []/[] buttons to select “DMPORT DEV”, and press the [ENTER] button.

4. LED on the jig lights.

5. Press the [

] button to exit from the test mode.

?/1

14. S-AIR TEST MODE

Procedure:

1. Enter the test mode menu.

2. Press the []/[] buttons to select “SAIR TEST”, and press the [ENTER] button.

3. S-AIR test menu is displayed.

4. Press the [

] button to exit from the test mode.

?/1

14-1. Power Procedure:

1. Enter the S-AIR test mode.

2. Press the []/[] buttons to select “POWER”, and press the [ENTER] button.

3. The messages “000 SET” is appears.

4. Press the []/[] buttons to select the output power. (OFF or 000 to 063)

5. Press the [ENTER] button, return to S-AIR test mode each item.

14-2. NAMG Procedure:

1. Enter the S-AIR test mode.

2. Press the []/[] buttons to select “NAMG”, and press the [ENTER] button.

3. The messages “AUTO” is appears.

4. Press the []/[] buttons to select the NAMG setting value. (107 to 117)

5. Press the [ENTER] button, return to S-AIR test mode each item.

14-3. Version check Procedure:

1. Enter the S-AIR test mode.

2. Press the []/[] buttons to select “VER. CHECK”, and press the [ENTER] button.

3. MICOM software version of S-AIR product is displayed.

4. Press the [ENTER] button, return to S-AIR test mode each item.

15. S-AIR TEST ELEC MODE

Not used for the servicing. Press the [

] button if having entered this mode.

?/1

17. UART FLASH (TARGET)

Not used for the servicing. Press the [

] button if having entered this mode.

?/1

18. COLD RESET Procedure:

1. Enter the test mode menu.

2. Press the []/[] buttons to select “COLD RESET”, and press

the [ENTER] button.

3. The message “CLEARED” appears, then the set turns off.

16. UART FLASH (SOURCE)

Not used for the servicing. Press the [

] button if having entered this mode.

?/1

8

SECTION 4

ELECTRICAL CHECK

FM AUTO STOP CHECK

signal

generator

Procedure:

1. Turn on the set.

2. Input the following signal from signal generator to FM antenna input directly.

Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz Deviation : 75 kHz Modulation : 1 kHz ANT input : 35 dBu (EMF)

Note: Use 75 ohm coaxial cable to connect signal generator and the set.

You cannot use video cable for checking.

Use signal generator whose output impedance is 75 ohm.

3. Set to FM tuner function and scan the input FM signal with automatic scanning.

4. Conﬁ rm that input frequency of A, B and C are detected and automatic scanning stops.

set

STR-KS370

When the station signal is received in good condition, automatic scanning stops.

9

STR-KS370

• Waveforms

SECTION 5

DIAGRAMS

– MAIN Board –

IC1003 <zvc (XTAL)

1

40 ns

500 mV/DIV, 20 ns/DIV

IC1005 qd (Xout)

2

200 ns

2 V/DIV, 100 ns/DIV

IC1704 wa (XOUT(O))

3

1.1 Vp-p

3.4 Vp-p

– HDMI PC Board – – DISPLAY Board –

IC3500 4 (XTALOUT)

7

100 ns

1 V/DIV, 50 ns/DIV

IC3000 qa (XOUT)

8

100 ns

2 V/DIV, 50 ns/DIV

3.2 Vp-p

3.5 Vp-p

Q701 (Base)

9

Q701 (Collector)

q;

6.2 Ps

1 V/DIV, 5 Ps/DIV

6.3 Ps

5 V/DIV, 5 Ps/DIV

3 Vp-p

15.8 Vp-p

81 ns

2 V/DIV, 50 ns/DIV

IC2004 4 (Y)

4

20.2 ns

1 V/DIV, 10 ns/DIV

IC2000 qf (XFSOOUT)

5

20.2 ns

1 V/DIV, 10 ns/DIV

IC2001 qf (XFSOOUT)

6

4 Vp-p

2.6 Vp-p

2.4 Vp-p

10

2.4 Vp-p

20.2 ns

1 V/DIV, 10 ns/DIV

5-1. BLOCK DIAGRAM - MAIN Section -

STR-KS370

DIGITAL

(PAGE 12)

(PAGE 13)

ANTENNA

TV OPT IN

SAT/CATV

OPT IN

J202

VIDEO

COAX IN

J

N

TV AUDIO IN

SA-CD/CD

AUDIO IN

AUTO

CAL MIC

COAXIAL

AM

FM 75Ω

HDMISPDIF

IC3527

L

R

L

R

DIGITAL OPTICAL

RECEIVER

IC203

DIGITAL OPTICAL

RECEIVER

IC202

ARC_SPDIF

AMP

2

J201

J200

R-CH

GAIN CONTROL

Q200

TUNER (FM/AM)

FM ANT

GND

AM ANT

GND

1

3

WAVE SHAPPER

IC211

7

LINE AMP

IC1705

MIC AMP

5

IC209

L CH

R CH

A+9V

DIGITAL AUDIO

INPUT SELECTOR

IC210

1C0

6

1Y

7

1C1

5

2

6

DMPORT L

DCAC R

9

TV L

5

SACD L

3

ANALOG AUDIO

INPUT SELECTOR

1

DCAC L

TUNER L

11

OUT L

IC212

SAIR OUT L

DATA23CLK

22

1

7

R-CH

IC2

4

A

2B14

X1700

12.288MHz

14

18

PLUG DETECT

SWITCH

Q201

DIGITAL AUDIO

INTERFACE RECEIVER

DIN0

3

DIN2

5

DIN1

4

XOUT(O)

21

22

XIN(I)

A/D CONVERTER

VinL

13

IC1704

IC1703

DATA(O)

CKOUT

BCK(O)

LRCK(O)

AUDIO(O)

XMODE

XSTATE(O)

ERROR(O)

CSFLAG(O)

DOUT

SCKI

BCK

LRCK

DATA_DIR, DOUT,

BCK, LRCK, CKOUT

AUDIO

SAIR OUT L

SC_SHIFT, SC_SCDT

DIR_XSTATE, DIR_RERR

(PAGE 13)

A

(PAGE 13)

B

x R-ch is omitted due to same as L-ch.

x SIGNAL PATH

: AUDIO (DIGITAL)

: AUDIO (ANALOG)

: TUNER

: MIC

(PAGE 13)

M

(PAGE 14)

P

(PAGE 13)

C

DIR_CE

DIR_RST

DIR_XSTATE

DATA_DIR

CKOUT

BCK

LRCK

DOUT

ERR

DIR_SCFLAG

SC_SHIFT

SC_SCDT

DIR_RERR

DIR_XSTATE

16

13

14

15

24

DIR_ZERO

DO

35

DI

36

CLK

38

CE

37

48

17

34

25

9

6

8

7

DIR_DO

DIR_DIN

DIR_CLK

DIR_CE

DIR_RST

DIR_XSTATE

ERR

DIR_CSFLAG

DIR_DO

DIR_ZERO

DIR_DIN

DIR_CLK

STR-KS370

DO/ST/SD

DI

CL

CE

TUNED_SD TUNED

RDS DATA

RDS CLK

43

45

41

40

44

42

75

ST_DI

ST_DO

ST_CLK

ST_CE

RDS_DATA

RDS CLK

86

87

BD3842DATA

BD3842CLK

51

66

TC74VHC153A

TC74VHC153B

11

DCACON/OFF

Xout

13 15

X1001 5MHz

18

100 1 2 24 2769 10

DIR_ZERO

DIR_HDOUT

SYSTEM CONTROLLER

IC1005 (1/4)

Xin

ROM_SDA

53

5 6

EEPROM

IC1014

ROM_SCLK

54

DAMP_SCDT/DIR_DIN

DAMP_SHIFT/DIR_CLK

DIR RST

DIR_HCE

DIR_XSTATE

19

DIR ERROR

DIR CSFLAG

CEC_DO

CEC_DI

UCOM RX-HDMI_TX

UCOM TX-HDMI_RX

HDMI_RST

HDMI_CNVSS

HRXD

HTXD

HRESET

CEC DATA

SWITCH

Q1006 – 1009

22

3

36

35

94

61

HRESET,

HTXD, HRXD

HDMI_CNVSS

CEC

D

(PAGE 12)

E

(PAGE 12)

U

(PAGE 12)

1111

STR-KS370

5-2. BLOCK DIAGRAM - HDMI PC Section -

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(PAGE 13)

G

(PAGE 11)

U

(PAGE 13)

5

(PAGE 11)

E

.

(PAGE 15)

1&

STR-KS370

1212

5-3. BLOCK DIAGRAM - DSP/S-AIR Section -

DATA_DIR, DOUT,

(PAGE 11)

(PAGE 12)

(PAGE 11)

(PAGE 12)

(PAGE 11)

(PAGE 15)

FLASH PROGRAMMING

BCK, LRCK CKOUT

A

SD0 – SD3, MCK,

F

C

G

B

S

BCK, LRCK

DIR_XSTATE, DIR_RERR

MUTE

AUDIO

CN1002

RESET

RTS1

CNVSS

CLK1

RXD1

TXD1

2

7

3

5

4

8

DATA_DIR

DOUT

LRCK

CKOUT

BCK

DIR_XSTATE

DIR_RERR

SD1

SD2

SD3

SD0

LRCK

MCK

BCK

MUTING

Q1700

SIGNAL SELECTOR

14 4A

13 4B

11 3A

10 3B

52A

62B

21A

31B

SWITCHING

31B

62B

10 3B

14

4A

13

4B

IC1701

SEL

1

IC1702

SEL

1

4Y 12

3Y 9

2Y 7

1Y 4

2Y 7

3Y 9

4Y 12

X1000 25MHz

78 DPSIA

79 DPSIB

88 DPLRCK

94 DPFSCK

89 DPLBCK

80 DPSIC

81 DPSID

82 DPSIE

97 NONAUDIO*

16 DIR_ERR

143

XTAL

142

CLKIN

125

SPICLK

127

MOSI

DSP

IC1003

126

MISO

SPIDS*

122

DPSOA 64

DPSOB 65

DPSOC 70

DPSOE 77

DPDVBCK 87

DPDVLRCK 86

INT_REQ

RESET*

15

121

MUTING

Q1004

BUFFER

14

13

2

3

5

6

SWITCHING

1

2

6

5

IC1015

SWITCH

IC1000

IC1002

12

4

7

3

AMP_DATA1

AMP_DATA2

AMP_DATA3

AMCK1

AMP_BCK1

AMP_LRCK1

2A0

3B0

5A1

6B1

11 A2

10 B2

14 A3

13 B3

BUFFER

IC1008

S

1

Y0 4

Y1 7

Y2 9

Y3 12

AMP_DATA1 – AMP_DATA3,

AMP_BCK1, AMP_LRCK1, AMCK

R-CH

S AIR OUT L

CN100

EZW-T100

4

2

16

26

15

24

14

23

19

18

7

12

25

20

11

STR-KS370

(PAGE 14)

H

(PAGE 11)

M

L ch

R ch

SD1

SD2

BCK1

BCK2

LRCK1

LRCK2

I2C_SDA

I2C_SCL

INT

ADC_SEL

GND

SRC_MUTE

RESN

STR-KS370

(PAGE 12)

DMPORT

DMPORT_TX

R

DMPORT_RX

DMPORT RX (UCOM TX)

DMPORT TX (UCOM RX)

DET

Rch

78

85

77

67

70

71

34

S-AIR GPIO2

SAIR_ADC_SEL

63

S-AIR RST

S-AIR_DET

S-AIR_SRC_MUTE

 SIGNAL PATH

: AUDIO (DIGITAL)

: AUDIO (ANALOG)

33

9

CN1701

5

6

7

13

Lch

14

N

R-CH

CLK1

31

UCOM TX-DMP RX

32

UCOM RX-DMP TX

91

DMPORT_DET

(PAGE 11)

CNVSS

21

PCM_MULTI

7

SYSTEM CONTROLLER

6

5

DSP MISO

DSP MOSI

DSP_SPI CLK

IC1005 (2/4)

26

88

DSP SPIDS

68

DSP_INTR

DSP_RESET

SAIR_SEL

S-AIR_I2C_SDA

S-AIR_I2C_SCL

1313

STR-KS370

5-4. BLOCK DIAGRAM - AMP Section -

(PAGE 13)

(PAGE 11)

AMP_DATA1 – AMP_DATA3,

AMP_BCK1, AMP_LRCK1, AMCK1

H

SC_SHIFT, SC_SCDT

P

SYSTEM CONTROLLER

IC1005 (3/4)

DAMP_LATCH1

DAMP_LATCH2

DAMP_LATCH3

DAMP_INIT

OVERFLOW1

OVERFLOW2

DAMP_SOFT_MUTE

DAMP_NSP_MUTE

DRIVE _RST(EN)

82

79

80

76

83

84

72

56

81

SC_SCDT

SC_SHIFT

SC_SCDT

SC_SHIFT

SC_SCDT

SC_SHIFT

AMP_DATA1

AMP_BCK1

AMP_LRCK1

AMCK1

AMP_DATA2

AMP_BCK1

AMP_LRCK1

AMCK1

AMP_DATA3

AMP_BCK1

AMP_LRCK1

AMCK1

SOFT_MUTE

NSP_MUTE

LAT1

LAT2

LAT3

INIT

OVF1

OVFW

LAT1

INIT

SOFT_MUTE

NSPMUTE

PGMUTE

LAT2

INIT

SOFT_MUTE

NSPMUTE

PGMUTE

LAT3

INIT

OVFW

OVF1

SOFT_MUTE

NSP_MUTE

PGMUTE

STREAM PROCESSOR

31 DATA1

30 BCK

29 LRCK

36 XFSIIN

21 SCDT

22 SCSHIFT

23 SCLATCH

27 INIT

24 OVF FLAGR

25

OVF FLAGL

19 SOFT MUTE

18 NSP MUTE

20 PGMUTE

STREAM PROCESSOR

31 DATA2

30 BCK

29 LRCK

36 XFSIIN

21 SCDT

22 SCSHIFT

23 SCLATCH

27 INIT

24 OVF FLAGR

25

OVF FLAGL

19 SOFT MUTE

18 NSPMUTE

20 PGMUTE

STREAM PROCESSOR

31 DATA3

30 BCK

29 LRCK

36 XFSIIN

21 SCDT

22 SCSHIFT

23 SCLATCH

27 INIT

24 OVF FLAGR

25 OVF FLAGL

19 SOFT MUTE

18 NSP MUTE

20 PGMUTE

IC2000

IC2001

IC2002

OUTL1(+) 11

OUTL2(–) 9

OUTR1(+) 6

OUTR2(–)

XFSOIN

XFSOOUT 14

FSOCKO

FSOI

OUTL1(+) 11

OUTL2(–)

OUTR1(+)

OUTR2(–)

XFSOIN

XFSOOUT 14

FSOI

OUTR1(+) 6

OUTR2(–)

OUTL1(+)

OUTL2(–)

XFSOIN

FSOI

DIGITAL POWER AMP

IC2005

PWM_A

6 39

PWM_B

8 36

/RESET

17

4

CLOCK

48

37

38

9

6

4

48

38

4

11

9

48

38

BUFFER

IC2004

X2000

49.152MHz

16

PWM_C OUT_C

PWM_D18

/RESET

7

/SD

5

6

PWM_A

8

PWM_B

/RESET

17

16

PWM_C OUT_C

PWM_D

18

/RESET

7

/SD

5

16

PWM_C

18

PWM_D

/RESET

17

6

PWM_A OUT_C

PWM_B

8

/RESET

7

/SD

5

OUT_A

OUT_B

OUT_D

DIGITAL POWER AMP

IC2006

OUT_A

OUT_B

OUT_D

DIGITAL POWER AMP

IC2007

OUT_A

OUT_B

OUT_D

RESET

Q2020 – 2021

31

28

39

36

31

28

39

36

31

28

+3.3V

L.P.F.

OVER LOAD

DETECT

Q2005, 2006

OVER LOAD

DETECT

Q2003, 2004

OVER LOAD

DETECT

Q2007, 2008

OVER LOAD

DETECT

Q2013, 2014

OVER LOAD

DETECT

Q2009, 2010

OVER LOAD

DETECT

Q2011, 2012

TB2002

+ _

TB2001

+ _

FRONT L

FRONT R

SUR L

SPEAKERS

SUR R

CENTER

SUBWOOFER

STR-KS370

(PAGE 15)

DRIVE OPC (DIAG)

SD

L

DC_DET

20

46

PROTECT DETECT

Q2018 – 2019

DC DETECT

Q2017

+31.5V

 SIGNAL PATH

: AUDIO (DIGITAL)

: AUDIO (ANALOG)

1414

5-5. BLOCK DIAGRAM - SMPS Section -

STR-KS370

(PAGE 14)

D380

DISPLAY

INDICATOR

D729

(G)

DISPLAY

INDICATOR

SD

L

FL700

FLUORESCENT

INDICATOR

TUBE

LED DRIVE

Q380

LED DRIVE

Q700

D729

(O)

ACTIVE

STANDBY

S350

INPUT

SELECTOR -

S351

SOUND

FIELD

S352

INPUT

SELECTOR +

S301

I/1

MASTER VOLUME

FLUORESCENT

INDICATOR TUBE DRIVER

IC700

SEG17

14 – 29,31

SEG1 – SEG16,

42 – 31

GRID1 – GRID12

1

SW1

2

SW1

LED DRIVE

REMOTE CONTROL

RECEIVER

IC750

ROTARY

ENCODER

RV750

DIN

CLK

STB

Q702

+31.5V

RECT

REGULATOR

SHUNT

REGULATOR

IC951

D931

SHUNT

IC931

RECT

D941

RECT

D942

RECT

D943

ISOLATOR

PC903

ISOLATOR

PC901

T902

SUB POWER

TRANSFORMER

ISOLATOR

PC902

D1003

D932

7

8

9

60

FL_D_OUT

57

FL_CLK

59

FL_LAT

58

CEC_STBY_LED

95

AD KEY

74

POWER KEY

90

KEY_0

4

SIRCS_IN

92

VOL JOG

SYSTEM CONTROLLER

IC1005 (4/4)

23PCONT_2

39PCONT_3_SAIR

47P_CONT4_DSP

50PCONT_1

97P_CONT_HDMI

73AC_CUT

12RESET

FOR FLUORESCENT

INDICATOR TUBE

HDMI +3.3V

HDMI +1.8V

VEE

+1.8V

REGULATOR

IC3523

RESET

SWITCH

Q1005

POWER ON/OFF

CONTROL Q943, 947

+5V

OSC Q701

+1.8V

REGULATOR

IC3528

REGULATOR

IC1010

+5V

REGULATOR

IC1700

K

+5V

REGULATOR

IC1009

+9V

REGULATOR

IC1012

+2.5V

REGULATOR

IC1001

+3.3V

REGULATOR

IC943

5VPWR

D1008

D1007

D3515D3514

D1001D1002

POWER VOLTAGE

CONTROL Q981, 982

+5V

REGULATOR

IC3510

+12V

REGULATOR

IC941

+5V

REGULATOR

IC942

Q

(PAGE 12)

B+ SWITCH

Q946

+6.4V

REGULATOR

IC3509

SAIR +4V

AVCC

HDMI +5V

(PAGE 12)

T700

DC/DC

CONVERTER

F1

F2

RECT

D726 – 727

AMP +12V

+5V

REGULATOR

IC1013

REGULATOR

IC2003

HDMI +1.8V

+1.8V

A +9V

DMPORT +5V

DSP +1.2V

AMP +1.8V

D +3.3V

+3.3V

REGULATOR

IC3526

STBY +3.3V

RESET SIGNAL

GENERATOR

IC1006

+5V

T901

MAIN POWER

TRANSFORMER

D905

D914, 915

D922

RECT D901

B+ SWITCH

Q921

TH901

D908

D906, 907

D910

LF902

LINE

FILTER

B+ SWITCH

Q901

POWER CONTROL

1

D

4

VCC

6

FB/OLP

8

STARTUP

D909

IC921

LF901

LINE

FILTER

POWER CONTROL

IC901

3

D

4

VCC

1

OCP

5

OLP

F901

(AC IN)

STR-KS370

(PAGE 13)

S

1515

STR-KS370

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)

For Printed Wiring Boards.

Note:

• X : Parts extracted from the component side.

• Y : Parts extracted from the conductor side.

• f : Internal component.

• : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.)

Caution:

Pattern face side: (Conductor Side) Parts face side: (Component Side)

Caution:

Pattern face side: (SIDE B) Parts face side: (SIDE A)

• Indication of transistor.

C

Q

B

E

CEB

These are omitted.

Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.

These are omitted.

For Schematic Diagrams.

Note:

• All capacitors are in μF unless otherwise noted. (p: pF) 50

WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise

speciﬁ ed.

• f : internal component.

• 2 : nonﬂ ammable resistor.

• 5 : fusible resistor.

• C : panel designation.

Note:

The components identiﬁ ed by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number speciﬁ ed.

• A : B+ Line.

• B : B– Line.

• Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : TUNER

* : Impossible to measure

• Voltages are taken with VOM (Input impedance 10 M).

Voltage variations may be noted due to normal production

tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production

tolerances.

• Circled numbers refer to waveforms.

• Signal path.

J : AUDIO (DIGITAL) F : AUDIO (ANALOG) f : TUNER E : HDMI N : MIC

Note:

Les composants identiﬁ és par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spéciﬁ é.

• Circuit Boards Location

HDMI PC board

FFC SUPPORT board

KEY FUNCTION board

DISPLAY board

LED board

KEY SELECTOR board

TUNER (FM/AM)

IR board

IO board

S-AIR board

MAIN board

SMPS board

STR-KS370

1616

STR-KS370

5-6. PRINTED WIRING BOARD - MAIN Board (Component Side) -

1 2 3 4 5 6 7 8 9 10 11 14 1512 13

A

B

MAIN BOARD (COMPONENT SIDE)

FLASH PROGRAMMING

C1509

R1725

R1729

R1730

R1724

C1701

R1741

C1729

R1031

C1062

R1125

R1130

C1055

JL1035

IC1014

C1300

R1309

JL1006

IC1012

IO

R1720

R1721

R1036

R1126

CL1010

R1094

R1083

R1086

JL1026

JL1025

R1301

R1047

R1136

JL1033

JL1029

1

4

5

8

L1003

CNP100

FB2002

D1008

SMPS BOARD

CN906

(PAGE 31)

C

D

IO BOARD

(PAGE 24)

E

F

HDMI PC

G

(PAGE 26)

H

I

C

CNS200

(CHASSIS)

F

BOARD CN3512

(CHASSIS)

CN1701

CL1711

CL1701

C1759

C1722

C1705

C1724

IC1700

IC1011

1

19

CN1007

EB1001

C1756

2

18

13

L1701

EB1700

L1000

CL1032

CL1027

12

R1740

C1520

R1335

C1523

CL1033

C1742

C1723

R1340

R1119

CL1057

C1760 R1743

CL1031

CL1030

C1736

CL1000

CL1029

C1718

R1118

CL1034

C1091

C1708

FB1708

R1113

R1114

R1115

584

C1706

CL1036

C1762

R1116

R1090

CL1041

CL1042

R1082

R1095

R1089

CNS700

CL1702

C1741

R1117

R1733

C1703

C1751

C1748

IC1701

16

CL1039

R1140

A

DISPLAY BOARD

CNS701

(PAGE 29)

118

CL1703

C1740

C1743

R1742

R1745

C1700

R1744

C1755

1

R1739

IC1705

C1726

C1744

C1745

R1750

C1749

C1747

IC1703

CL1028

R1713

R1706

916

1

8

R1703

R1701

R1700

9

L1010

CL1051

R1702

8

1

CL1053

R1705

R1704

BE

R1737

Q1700

CL1040

IC1702

1

2

R1141

R1310

R1139

R1142

R1318

IC1009

C1311

R1751

CL1055

R1313

R1024

R1023

CL1054

R1707

R1033

C1312

CL1049

C1030 C1507 C1028 C1027 C1024

C1750

L1011

CL1050

C1506

6

R1154

C1040

C1033

R1223

C1309

15

C1013

R1004

R1153

CNS201

C1042

C1037

C1034

C1032

C1508

C1014

24

2

R1025

R1006

C1047

C1003

R1000

19

CN1002

R1155

R1129

R1128

25

R1131

R1306

C1719

FB1710

FB1707

C1752

1

R1034

C1048

C1049

C1050

C1505

72

73

IC1003

108

109

C1015

C1017

C1016

C1012

R1011

CL1047

R1007

R1009

R1008

C1002

R1002

C1001

15

R1003

6

IC1001

CL1012

R1156

CL1002

CL1004

IC1704

FB1700

C1761

R1723

R1726

R1753

R1738

R1731

C1717

C1707

FB1702

R1718

R1716

CL1043

R1715

FB1701

R1732

R1717

IC1000

C1060

C1061

C1053

C1051

C1052

R1012

C1010

C1018

C1011

C1019

X1000

R1013

R1010

C1000

C1310

C1252

C1738

48

1

12

13 24

R1722

R1030

C1054

37

36

1

144

C1020

R1032

C1036

R1005

C1730

C1039

C1035

C1504

C1029

R1026

C1081

C1038

C1512

C1043

R1029

C1031 C1503

C1025

R1727

R1019

R1017

C1082

C1083

R1728

37

36

25

JL1076

R1734

X1700

IC1002

BE

Q1004

R1027

R1022

CL1037

CL1048

R1021

C1046

• See page 16 for Circuit Boards Location.

SMPS BOARD

CN904

(PAGE 31)

G

JL2002

JL2087

C1255

L1009

R1185

C1250

C1113

Q1009

R1064

R1158

R1071

C1080

R1157

R1222

IC1006

JL2001

C1525

C1111

IC1013

C1112

L1008

19

R1060

R1147

R1148

R1050

R1049

R1055

JL1010

C1067

C1065

JL1024

R1096

JL1031

R1134

C1085

R1105

BE

Q1005

C1078

TP2001

C1524

FB1002

R1076 R1073

R1135

C1251

R1097

R1112

C1519

R1332

IC1015

B

S-AIR BOARD

CN104

(PAGE 24)

EB1000

C1518

16

18

C1513

IC1010

6

15

R1044

R1045

IC1008

R1051

1

R1042

8

R1061

R1065

1

220

D1005

Q1006

R1099

BE

R1106

D1003

R1133

R1138

R1098

JL1021

R1093

R1190

R1304

C1254

R1191

R1192

C1256

C1257

C1092

16

R1074

9

C1106

C1510

CN110

R1305

BE

R1108

Q1008

B

B E

E

Q1007

X1001

R1067

IC1005

C1301

R1143

JL1032

R1165

R1336

R1145

112

L1007

D1001D1002

C1088

R1188

R1163

E

9

R1330

4

CN2002

R1325

• : Uses unleaded solder.

TB2001

SPEAKERS

CENTERSUBWOOFER

B2000

Q2017

C2196

C2033

1

C2204

R2147

D2126

TP2007

Q2018

BE

R2151

C2205

Q2020

R2148

R2150

R2152

C2345

R1181

TP2003

R1182

R1175

R1180

R1178

R1176

R1173

BE

R1172

R2140

C2197

R2155

CL2008

JL2098

R2146

R2149

Q2021

R1321

R1338

Q2009

Q2010

BE

C2073

R2141

SL2001

SL2002

BE

Q2019

CL2004

C2206

IC2003

R2145

C2341

C2046

FB2000

R1174

R1179

R1177

R2099

C2297

L2012 L2013

JL2122

TP2005

C2307

R2038

R2040

R2041

C2342

44

1

JL2126

C2328

R2205

R2039

C2026

C2331

R2018

JL2133

R2019

C2260

R2128

12 13

24

25

C2283 C2284

C2293

IC2007

R2209

EB2000

C2035

C2034

C2036

JL2128

C2023

JL2125

R2210

R2020

C2325

JL2135

TP2014

C2278

R2129

C2327

1

36

TP2030

48

37

C2319

23

22

JL2141

C2316

JL2138

R2100

R2101

C2303

C2031

IC2002

C2030

TP2033

R2159

R2022

TP2032

TP2031

Q2012

BE

R2113

R2202

JL2142

R2198

R2023

R2200

R2021

C2072

BE

Q2011

C2287C2288 C2289 C2290

EB2005

R2028

Q2007

C2298

C2294

IC2006

CL2007

R2208

JL2123

JL2124

R2211

C2013

R2009

R2036

BE

R2085

C2306

C2017

44

1

JL2127

C2071

R2204

C2016

C2043

C2329

C2259

R2013

Q2008

BE

C2265C2266 C2267C2268

C2330

JL2132

R2087

R2014

TP2010

TP2009

C2279

C2272C2273

C2324

C2326

JL2134

R2072

R2088

12

1

13

48

24

37

25

36

TP2026

TP2024

R2158

TP2025

(CHASSIS)(CHASSIS)

TB2002

SPEAKERS

SUR RSUR L FRONT RFRONT L

C2070

Q2013

Q2005

Q2014

BE

R2127

EB2003

R2203

23

R2073

C2318

22

C2317

C2302

C2021

C2020

TP2027

R2017

JL2143

JL2140

R2201

JL2139

R2199

R2026

IC2001

R2016

R2015

EB2004

R2024

(CHASSIS)

Q2006

B

E

C2069

R2069

IC2005

IC2000

TP2008

R2187

JL2092

JL2093

R2178

C2003

C2255

C2247 C2249

C2242

C2323

C2322

C2243

44

1

JL2096

JL2630

R2164

R2034

R2057

C2006

R2007

L2003L2006L2007

13

TP2011

TP2012

R2008

BE

R2058

12

24 25

Q2003

C2068

C2320

JL2670

C2253

TP2013

R2011

R2055

C2321

R2042

1

48

37

36

R2010

BE

R2043

23

22

R2228

TP2015

TP2002

Q2004

TP2016

C2263

C2010

C2270

C2251

R2185

JL2102

C2011

R2012

R2157

C2240

C2231

JL2101

R2033

FB2003

C2234 C2235

L2000

C2238

EB2001

JL2103

R2184

R2183

C2040

X2000

R2035

C2038

C2039

JL2003

CL2003

C2207

JL2055

IC2004

R2031

EB2002

JR

1-881-001-

(CHASSIS)

11

(11)

J

STR-KS370

1717

STR-KS370

5-7. PRINTED WIRING BOARD - MAIN Board (Conductor Side) -

1 2 3 4 5 6 7 8 9 10 11 14 1512 13

A

MAIN BOARD (CONDUCTOR SIDE)

B

C

D

E

F

G

TP2000

C2237

C2236

JL2091

JL2090

C2337

R2160R2161

JL2052

C2012

C2239

R2054

JL2089

C2008

JL2051

JL2088

C2066

C2232

C2233

C2220

JL2097

R2224

C2248

C2004

JL2100

C2009

TP2019

R2053

C2254

C2230

R2177

R2165

C2007

C2005

C2250

C2044

TP2020

C2221

C2067

C2252

C2241

C2335

R2166

C2218

R2068

C2256

TP2004

JL2053

C2047

C2091

JL2078

R2067

JL2095

TP2021

C2244

JL2094

C2246

TP2022

C2219

C2092

C2045

C2216

C2154

R2126

TP2035

TP2036

JL2048

JL2047

JL2110

JR

JR1005

• See page 16 for Circuit Boards Location.

CL2002

TP2037

C2155

C2217

TP2038

C2175 C2215

R2125

JL2049

C2333

C2271

C2269

C2276

C2262

JL2105

JL2118

C2301

C2018

JL2107

R2188

C2296

C2014

C2019

C2264

C2257

R2206

C2015

JL2109

R2191 R2192

R2227

C2022

R2084

C2282

C2292

C2291

C2309

C2214

JL2050

JL2120

JL2117

R2194

R2083

C2176

C2336

C2211

C2156

JL2112

JL2115

TP2040

R2112

TP2039

JL2046

C2285

C2286

C2157

JR1004

JL2045

TP2041

C2212

C2210

C2208

R2111

C2339

C2223

JL2111

JL2104

C2224

JL2108

JL2106

R2189

R2190

JL2119

C2275

R2226

C2299

C2032

C2024

C2028

JR

C2029

C2295

C2258

TP2042

C2025

C2027

C2226

C2225

R2098

R2207

• : Uses unleaded solder.

C2213

C2209

R2097

JL2076

JL2077

C2338

C2281

C2222

C2227

TP2006

JL2121

JL2116

R2195

C2308

C2037

R2193

JL2113

JL2114

C2348

C2229

C2228

CL2005

C2343

CL2009

CL2010

C1514

JR1010

C1716

CL1071

JR

C1007

CL1017

CL1715

CL1018

CL1707

CL1725

CL1721

CL1717

CL1020

JR1008

JR1013

JR

JL1007

CL1021

CL1730

CL1710

C1058

JR

JR1007

CL1022

CL1705

CL1723

JR

CL1073

CL1023

CL1724

CL1718

CL1713

CL1024

CL1706

CL1727

CL1709

CL1720

CL1729

JR1011

CL1708

CL1722

CL1716

C1021

CL1025

CL1712

JR

CL1728

CL1726

C1266

JR1009

CL1006

CL1075

JR1012

JR

R1719

CL1035

FB1703

FB1704

C1521

C1702

R1747

R1746

R1735

R1736

CL1714

D1700

C1746

D1701

R1137

CL1052

CL1056

JR

CL1026

R1341

CL1074

CL1016

CL1015

CL1003

FB1705

FB1706

C1714

C1522

CL1007

CL1001

JR

JR1001

CL1072

C1709

C1710

C1715

C1711

JL1019

R1164

C1071

R1075

R1171

R1028

R1059

JL1018

JL1015

R1052

R1063

R1169

R1066

R1103

C1075

R1068

JL1027

R1168

C1073

R1187

R1160

C1089

R1035

R1167

JL1013

R1087

R1166

R1111

C1105

R1109

JL1016

R1170

R1159

R1069

C1074

FB1001

JL1017

R1102

CL1070

R1110

R1070

C1066

CL1069

C1103

CL1008

L1004

CL1005

R1146

JL1011

R1092

CL1068

C1258

CL1066

JR1002

R1100

CL1064

CL1065

JR

R1077

R1078

C1259

CL1067

R1053

CL1063

CL1062

C1093

CL1061

L1005

CL1060

R1014

CL1059

R1084 R1085

JR1006

C1072

C1712

JR

C1005

JR1003

C1004

C1086

FB1013

JL1020

JL1012

JL1014

R1048

JR

JR1000

JR

C1261

D1000

CL1014

R1104

CL1013

R1101

CL1009

R1225

R1224

R1339

R1107

R1058

C1076

R1162

C1079

11

1-881-001-

(11)

H

I

J

STR-KS370

1818

STR-KS370

5-8. SCHEMATIC DIAGRAM - MAIN Board (1/5) -

1 2 3 4 5 6 7 8 9 10 11 14 1512 13

A

B

C

D

E

MAIN

BOARD

(3/5)

(Page 21)

A

IO

BOARD

CNS200

(Page 25)

8

ST_TUNED

ST_CLK

RDS_CLK

RDS-DATA

RDS DATA

RDS CLK

DO/ST/SD

TUNED SD

TC74VHC153 B

TC74VHC153 A

TUNER GND

OPT OUT

DMPORT L

DMPORT R

ANALOG OUT R

ANALOG OUT L

BD3842 DATA

SAIR OUT R

BD3842 CLK

SAIR OUT L

DCAC ON/OFF

MAIN BOARD (1/5)

ST-CE

ST_DI

SD-DO

CNS201

25P

25

24

23

22

CL

21

DI

20

CE

19

18

AGND

17

16

+9AV

15

14

13

12

11

DGND

10

9

DGND

8

7

+3.3V

6

5

4

3

2

1

• See page 10 for Waveforms. • See page 33 for IC Block Diagrams. • See page 38 for IC Pin Function Description.

DIR_XSTATE

DATA_DIR

DIR_ZERO

DIR_NONAU

DIR_CSFLAG

DIR_RERR

DIR_ERR

DIR_DO

DIR_DIN

DIR_CE

DIR_CLK

DIR_RST

R1730

R1729

R1732

1k

C1712

C1729

0.1

33p

12.288MHz

R1721

100

3

R1720

100

C1701

16V47

C1715

0.1

0R1724

100

C1711

0.1

C1709

0.1 R1725

R1727

3.3

25

26

27

28

29

3.3

30

31

1.8

32

33

3.3

34

3.3

35

0

36

0

0R1728

0

C1730

X1700

33p

R1734

1k

R1741

1M

JL1076

XIN(I)

EMPHA

AUDIO(O)

CSFLAG(O)

F0(O)

F1(O)

F2(O)

FV(O)

DVDD

DGND

VREF

BPSYNC(O)

ERROR(O)

DO

DI

CE

CL(I)

37 38 39 40 41 42 43 44 45 46 47 48

0 0 3.3 3.3 3.3

DVDD

XOUT(O)

XMCK(O)

IC B/D

IC1704

DIGITAL AUDIO

INTERFACE RECEIVER

IC1704

LC890561W

XSEL(I)

MODE0(I)

MODE1(I)

DGND

DVDD

100

R1722

100

R1718

XSTATE(O)

DOSEL0(I)

DATA(O)

LRCK(O)

DOSEL1(I)

CKSEL0(I)

FB1701

131415161718192021222324

BCK(O)

SPDIF(O)

CKSEL1(I)

1.71.71.72.53.33.31.61.60

CKOUT

LPF(O)

DISEL(I)

XMODE

C1738

FB1702

AGND

AVDD

AGND

AD_IN

DVDD

DGND

DIN2

DIN1

DIN0

0.01

100R1717

220R1716

330R1715

C1707

C1717

0.1

0.022

R1731

220

C1716

0.1

C1719

470

C1710

C1761

10V

0.1

470 10V

FB1710

12

3.3

11

0

10

9

3.3

8

3.3

7

6

0.3

5

2.8

4

0

3

2

1

R1738 10k

R1753

R1726

100

100R1723

FB1707

C1751

C1748

C1747

C1744

1

50V

C1745

1

50V

10

50V

10

50V

0.1

C1749

0.1

50V

10

C1752

C1750

0.1

R1733

1k

IC B/D

IC1703

A/D CONVERTER

IC1703

PCM1808PWR

2.5

1

Vref

VinR

2

AGND

3

AVcc

4

DVdd

5

DGND

6

SCKI

LRCK BCK

IC1700

+5V REGULATOR

IC1700

TK11150CSCL-G

1

CTRL

2

GND

CNp Vout

D1700

VinL

FMT

MOD1

MOD0

DOUT

Vin

5

3.4

1.7

1.7 1.7

1.3

3.3

C1736 1000p

MA2J1110GLS0

2.5

14

2.5

13

3.4

12

11

10

1.3

9

87

5

6.3

43

D1701

MA2J1110GLS0

R1750

R1751

FB1708

100

EB1700

E

(CHASSIS)

Q1700

RT1N141C-TP-1

MUTING

3.1

0

R1713

100

E+6V

3

AGND

+3.3V

MAIN

BOARD

(2/5)

(Page 20)

C1708

C1746 1000p

1

C1703

R1737

1

10k

F

G

H

I

J

STR-KS370

BOARD

(Page 21)

DMPORT

DC5V

0.7A MAX

14

MAIN

BOARD

(3/5)

(Page 21)

11

MAIN

(3/5)

SAIR-OUT-L

SAIR-OUT-R

DCACON/OFF

BD3842CLK

BD3842DATA

TC74VHC153A

TC74VHC153B

DMPORT_DET

DMPORT_TX

DMPORT_RX

5

MAIN

BOARD

(2/5)

(Page 20)

VBUS(5V)

VIDEO5V

DMPORT RX (UCOM TX)

DMPORT TX (UCOM RX)

WM DET

WM A/D

(Lch)AGND

(Rch)AGND

WM RX

WM TX

DGND

VIDEO

VGND

FB1700

C1726

10

50V

HDMI_SD0

C1755

100p

R1744

22k

R1745

IC1705

LINE AMP

IC1705

NJM4565M(TE2)

R1742

R1743

22k

4321

V-

5 5 5 8

R1746

47k

R1740

C1512

1000

6.3V

+5V

C1086

0.1

FB1704

C1705

0.1 C1722

C1740 1

C1743 1

C1741

C1742 1

FB1703

C1760

0.1 C1759

100

16V

1

C1724

10

50V

CN1701

18P

1

2

3

NC

4

5

6

DET

7

8

R1719

9

100

10

CL1703

11

CL1702

12

CL1701

Lch

13

CL1711

Rch

14

15

16

17

18

C1756

100p

C1700

R1739

47k

505

V+

8765

47k

R1747

47k

C1723

R1736

47 0.1

16V

100

4.7k 16V

C1706

L1701

R1735

3.3k

100R1701

220R1700

HDMI_SD2

2Y

3B3A4Y4B4A

HDMI_SD1

00001.701.71.701.7

1A1B1Y2A2B

SEL

ST

VDD

161514131211109

3.40.30.2000

C1718

10

50V

C1702

0.1

FB1706

R1703

HDMI_BCK

HDMI_MCK

0 0

87654321

1A

1B

1Y

2A

2B

2Y

10uH

GND3Y

3B3A4Y4B4A

1.7 0 1.7 1.3 0 1.3 3.4

ST

161514131211109

IC B/D IC B/D

IC1701

SEL

SIGNAL SELECTOR

IC1701

TC74VHC157FT(EKJ)

VDD

C1762

10

50V

C1714

0.1

FB1705

HDMI_SD0

HDMI_LRCK

HDMI_SD3

IC1702

SWITCHING

IC1702

TC74VHC157FT(EKJ)

87654321

GND3Y

HDMI_SD1

HDMI_SD2

HDMI_SD3

HDMI_LRCK

HDMI_BCK

HDMI_MCK

DIR_CLK

DIR_CE

DIR_DIN

DIR_DO

DIR_ERR

DIR_CSFLAG

DIR_RST

DIR_XSTATE

DIR_ZERO

DIR_RERR

DIR_NONAU

DATA_DIR

100R1704

100R1705

100R1707

100

100R1706

ARC_SPDIF

HDMI_MUTE

HDMISPDIF

MULTI_PCM

HDMI_SD0

HDMI_SD1

HDMI_SD2

HDMI_SD3

HDMI_LRCK

HDMI_BCK

HDMI_MCK

DGND

DIR_CLK

DIR_CE

DIR_DIN

DIR_DO

DIR_ERR

DIR_CSFLAG

DIR_RST

DIR_XSTATE

DIR_ZERO

DIR_RERR

DIR_NONAU

DATA_DIR

A+9V

LRCK

MCK

BCK

SI_D

SI_C

EMG_MUTE

SI_E

SI_B

9

MAIN

BOARD

(3/5)

(Page 21)

10

MAIN

BOARD

(3/5)

(Page 21)

1

MAIN

BOARD

(2/5)

(Page 20)

1919

Sony STR-KS370, STR-SK370 Schematic

TABLE OF CONTENTS

SERVICING NOTES

DISASSEMBLY

7 case

6 front panel block

8 MAIN board

TEST MODE

ELECTRICAL CHECK

DIAGRAMS