Sony STR-DE925,STR-V919 Service Manual

STR-DE925/V919

US Model

Canadian Model

E Model

PX Model

STR-DE925

Chinese Model

STR-V919

SERVICE MANUAL

— Continued on next page —

SPECIFICATIONS

Dolby Laboratories Licensing Corporation.
“DOLBY” the double-D symbol a “AC-3” and “PRO LOGIC” are
trademarks of Dolby Laboratories Licensing Corporation.

FM STEREO FM-AM RECORDER

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

Ver 1.1 2003. 06

9-922-896-12

2003F16-1
© 2003.06

Photo : STR-DE925

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
With 8 ohm loads, both channels driven, from 20 - 20,000 Hz; rated
110 watts per channel minimum RMS power, with no more than

0.09% total harmonic distortion from 250 milliwatts to rated output
(USA model only).

Amplifier section

POWER OUTPUT
Stereo mode

(8 ohms 20 Hz - 20 kHz, THD 0.09%)
110 W + 110 W

Surround mode

(8 ohms at 1 kHz, THD 0.8%)
Front: 110 W/ch
Centera): 110 W
Reara): 110 W/ch

a)Depending on the sound field settings and the source, there may be no

sound output.

Dynamic power output

165 W + 165 W, 8 ohms
230 W + 230 W, 4 ohms

Harmonic distortion at rated output

Less than 0.09% (with sound field, tone, and bass
booster bypassed)

Frequency response

PHONO: RIAA

equalization curve
±0.5 dB

CD, TAPE, MD/DAT, TAPE/MD, DVD/LD, TV/DBS,
VIDEO 1, 2, and VIDEO 3 :

10 Hz - 50 kHz +0.5/-2 dB (with sound field, tone,
and bass booster bypassed)

Inputs (Analog)

PHONO:

Sensitivity: 2.5 mV
Impedance: 50 kilohms

S/Nb): 75 dB (A, 2.5 mVc))
CD, DVD/LD, TAPE, MD/DAT, TAPE/MD, TV/DBS,
VIDEO 1, 2, and VIDEO 3 :

Sensitivity: 150 mV

Impedance: 50 kilohms

S/Nb): 82 dB (A, 150 mVc))

b)78’ IHF
c)W eighted network, input level

Inputs (Digital)

DVD/LD (coaxial):

Sensitivity: -

Impedance: 75 ohms

S/N: 100 dB (A, 20 kHz LPF)
DVD/LD, TV/DBS, MD/DAT (Optical):

Sensitivity: -

Impedance: -

S/N: 100 dB (A, 20 kHz LPF)

Outputs

TAPE, MD/DAT, TAPE/MD, (REC OUT); VIDEO 1, 2
(AUDIO OUT):

Voltage: 150 mV

Impedance: 10 kilohms
WOOFER:

Voltage: 2 V

Impedance: 1 kilohms
PHONES:

Accepts low - and high-impedance headphones

STR-DE925/V919

— 9 — — 10 —

3-2. BLOCK DIAGRAM – MAIN SECTION –

• Abbreviation
CND :Canadian
EA :Saudi Arabia
MY :Malaysia
SP :Singapore
CH :Chinese

L

60

DATA

FM

AM

FM
75Ω

AM

DO

TUNED

TMUTE

STEREO

DATA

CLK

CE

L OUT

R OUT

TUNER UNIT

DO

TUNED

TMUTE

STEREO

S DATA

S CLK

S LAT

R CHR CH

: FM

: CD

• Signal Path

• RCH is omitted

PHONO

LCD

J301

LINPUT

LOUTPUT

J302

J001

MD/DAT

M OUT

1

J201

MONITOR

J202

J203

TV/LD

DVD

VIDEO 2

VIDEO 1

V1 IN

13

V1 OUT

15

V2 IN

9

V2 OUT

11

TV

3

LD

5

8

VEE

16

VCC

14

SW1

10

SW2

4

SW3

6

SW4

3 2

VIDEO SELECT

IC201

-5V

REG

IC202

-15V

+5V

3

2

1

7

5

10

4

8

11

CONTROL

CE
13

CLK15DI

14

AUDIO SELECT

IC301

MUTE
Q302

S LAT

S CLK

S DATA

31

EQ AMP

IC302

MUTE
Q304

IC407

MUTE
Q354

RY301

RELAY
DRIVE

Q301

IC408

RV401

VOLUME

RV402

BALANCE

L

C

W

SL

M

UP

DOWN

V-A

81

SYSTEM

CONTROL

IC1201

V-B82

V-E

83

V INH

80

16

61

AUTO STOP

62

STEREO

97

TUNER MUTE

S DATA

S CLK

S LAT

DO

TUNED

STEREO

TMUTE

57

DATA

58

CLOCK

56

LATCH

D

: PHONO

J299

VIDEO

LAUDIO

VIDEO 3

V3 IN

7

1

2

7

9

4

11

CONTROL

CE13CLK15DI

14

SELECTOR

IC303

S LAT

S CLK

S DATA

6

8

L

TAPE

INPUT

LOUTPUT

Y

V1 O

3

VIDEO 1

INPUT

5

TV

15

1LDM O

Y SWITCH

IC252

C

Y

J252

VIDEO 1

OUTPUT

Y

C

C

C SWITCH

IC251

C

Y

J251

MONITOR

OUTPUT

TV/LD

J253

J252

J303

V1 O3

13

TV

15

1

V1 I

M O

13

V1 I

C

Y

DVD

5

LD

LTV/DBS

L

J305

VIDEO2

INPUT

INPUT

LOUTPUT

L

VIDEO1

OUTPUT

LINPUT

J304

TM301

ANTENNA

4 14 15 13 2 3 1

10

12

6

9

LINPUT

DVD/LD

10

IR LINK

DET

IC001

DVD/LD

IR LINK

DET

IC002

TV/DBS

IR LINK

DET

IC003

MD/DAT

IR LINK

DET

IC004

MD/DAT

(INPUT)

(OUTPUT)

DVD/LD

COAXIAL

IC007

14SW1
10SW2
4SW3
6SW4

14SW1
10SW2
4SW3
6SW4

INPUT

OUTPUT

INPUT

INPUT

OUTPUT

OUTPUT

DVD/LD

TV/DBS

INPUT

CH, SP, MY MODEL

DE925

MODEL

V919

MODEL

15
14
13
12

4
3
2
1

SELECT
SWITCH

IC1005

5

B
C

A

11
10
9

B
C

A

IC1006

76

SWDT

111A110B109

C

A

B

C

78

SCLK

77

XLAT

2

RESET

75

SRDT

DIGITAL AUDIO

I/F RECEIVER

IC1101

D IN

47

RESET

11

SWDT

40

SCLK

42

XLAT

41

XO

27

XI

26

X1101

24.576MHz

35

D OUT

29

CLK

34

BCK

36

LRCK

30

ERROR

38

SRDT

X1301

49.152MHz

IC1102

IC1102

IC1305 IC1305

IC1305

13 10

CLOCK
DIVIDE

IC1403

IC1305

IC1102

IC1108

MEMORY

IC1302

A0-7

D0-7

LATCH
IC1303
IC1304

A8-15

D0-7

EMRD

5

EXTMEM

21

CLK

30

SDATA1

22

SDATA2

27

MCLK

44

SCK

43

SCLK1

25

SCLK2

28

RCLK

42

LRCLK1

26

LRCLK2

29

DOLBY

DIGITAL AUDIO DECODER

IC1301

41

AUDATA0

40

AUDATA1

39

AUDATA2

D0-7

SCCLK

7

16

SCCLK

SCD IN

6CS18

RESET

36

15

SCDOUT

17CS20

RESET

20

INTREQ

19

SCDOUT

19

INTREQ

18

SCDIN

Q1204

Q1205

IC1202

67

D1201

14

ANALOG/DIG

ERROR

A0-7

D0-7

SRAM
IC1402

SIA

117

SIB

118

SIC

119

XWE

74

XOE

70

25 32

16
20
23
25

.

HD0
HD7

D0-7

AD0 AD7

21

XHDWR

35

HA0

AUDIO DSP

IC1401

HA0

15

XHDWR

9

XHDRD10XHDCS14XRST

26

22

XHDRD

24

XHDCS

23

HRDY

36

XRST

13

HRDY

5

SOD

37

SOD

6

CDTO

IC1202

IC1202

Q1206

Q1207

5

CDTI

4

CCLK

3CS7PD108

RY DIRECT PASS

2

SOA

CLK1

99

LRCK

115

BCK0

113

3

SOB

4

SOC

27

L OUT1

LIN-

29

AUDIO CODEC

IC1103

CDTO

44

CDTI43CCLK42CS41PD

17

SDTO

9

MCLK1

39

BCLK

4

LRCK

5

SDTI 1

6

SDTI 2

7

SDTI 3

8

LIN+

30

IC304 IC1104 IC1104

23

L OUT3

IN

14

DATA

9

CLK

8

LAT

10

15

OUT
DATA
CLK
LAT

IC414

IN

3

DATA

9

CLK

8

LAT

10

2

OUT

DATA
CLK
LAT

IN

14

15

OUT

IC407

IC410

IC410

IN

14

DATA

9

CLK

8

LAT

10

15

OUT
DATA
CLK
LAT

IC406

MUTE
Q303

IC409

IC405

24

R OUT3

25

L OUT2

IC1104

IC1105

IC1105

IC1106

VOL CONT

IC416

VOL CONT

IC415

VOL CONT

LED

DRIVE

Q120

LED VOL

MUTE

CONT

Q1201

85

FUN MUTE

Q1202

Q1203

U DATA

52

DISP DATA

55

DISP CLK

51

DISP MR

53SREQ

10

SOTO

9

SINO

87

MD2

89

MD0

90RESET

U CLOCK
U MREQ

U SREQ

SOTO
SINO
MD2
MD0

U REST

B

A

107

RY POWER

RY POWER

48

EV STB50EV CLK

49

EV DATA

LAT

CLK

DATA

84

AC MUTE

79

PROTETOR

106

RY HP

101

RY FRONT A

102

RY FRONT B

103

RY CENTER

105

RY WOOFER

104

RY REAR

AC MUTE
PROTECTOR

RY HP
RY FRONT A
RY FRONT B

RY CENTER
RY WOOFER
RY REAR

C

92XO93

XI

X1201
4MHz

64

STOP

STOP

: DIGITAL

S-VIDEO

STR-DE925/V919

— 11 — — 12 —

3-3. BLOCK DIAGRAM – POWER SECTION –

• Abbreviation
CND :Canadian
EA :Saudi Arabia
MY :Malaysia
SP :Singapore
CH :Chinese

RELAY
DRIVE

Q601

LIMITER

Q504

14

5156

1

2

3

VEE

VCC

IN

MUT

+VE

NF

-VE

13 VCC

POWER AMP(L)

IC501

L

+B

-B

LIMITER

Q505

BOOSTER

Q506

BOOSTER

Q507

CUR DET

Q508

PROTECTOR

Q509,510

Q511

LIMITER

Q604

9

15

12

11

VEE

IN

+VE

NF

-VE

13 VCC

POWER AMP(C/W)

IC601

C

+B

-B

LIMITER

Q605

BOOSTER

Q606

BOOSTER

Q607

CUR DET

Q608

PROTECTOR

Q609,610

Q611

LIMITER

Q704

MUTE

Q501,503

14

5156

1

2

3

VEE

VCC

IN

MUT

+VE

NF

-VE

13 VCC

POWER AMP(SL)

IC701

SL

+B

-B

LIMITER

Q705

BOOSTER

Q706

BOOSTER

Q707

CUR DET

Q708

8

RY602

RELAY
DRIVE

Q546

RY501

RELAY
DRIVE

Q596

RY502

RELAY
DRIVE

Q645

RY601

RELAY
DRIVE

Q749

RY701

RELAY
DRIVE

Q544

RY503

RELAY
DRIVE

Q901

RY901

J501

C

S(L)

S(R)

R CH

R CH

WIRELESS

REAR

SPEAKER

CNJ701

SURROUND

SPEAKER

WOOFER

J701

PHONES

TM701

FRONT

SPEAKER

TM501

R CH

R CH

POWER

CONT
IC901

58

3

6

DELAY
+B SW

Q902

SWITCH
Q747,748

D801

SWITCH

Q614,618

INV SW

Q617

SWITCH
Q613,616

SWITCH
Q612,615

PROTECTOR

Q547-549

F2

F1

+5.6V

F801

F802

D802-805

+B

-B

IMPEDANCE
SELECTOR

8

4

S501

F901

D901-904

CNJ901

CNP901

AC IN

L

R

:FM

:CD

D

• Signal Path

• RCH is omitted

IN

W

6

14 VCC

2+VE
3-VE

1

+18V
REG

IC702

3

F803

F804

1

+3.3V
REG

3

3

+5V

REG

1

IC809

+24V

-24V

1

5V

REG

3

IC809

IC801

IC802

CNJ901

T902

MODE CONTROL

IC102

STOP

A

AC MUTE

PROTECTOR

REMOTO
CONTROL
RECEIVER

IC101

26

SIRCS

Q101

RESET

Q105

77

RESET

POWER

S131

POWER KEY

74

F2

F1

16

JW925

MY, SP, CH
MODEL

MY, SP
MODEL

47

STOP

I/R
CONT
IC181

I/O

BUFFER

Q182

RESET

Q181

11

14125

33
2

LAT

98

15 16

X102

7.28MHz

I/R
DET

IC180

LED

DRIVE

Q183,184

D184-186

URESET

TV/DBS

MONITOR

VIDEO 1

VIDEO 2

S-LINK

J204

J256

J255

J257

J258

LEVEL

CONTROL

Q257,258

BUFFER

Q253

11

4

LEVEL

CONTROL

Q255,256

LEVEL

CONTROL

Q254

3
2

5
6

7

1

IC254

SWITCH

Q251,252

ST-I/O
IC251

US,CND MODEL

1 MUT

D1202

D1203

2

-15V
REG

IC402

3

3

+15V
REG

IC401

1

1

+12V
REG

IC403

3

3

+5V

REG

IC404

1

-15V

+15V

TU +12V

TU +5V

+32V

REG

+32V

Q801

D808

F805

1

+3.3V
REG

3

IC803

D5V

D3.3V

D3.3V

T901

F904

JW903

F903

US,CND
MODEL

US, CND, E, EA, CH, PX
MODEL

E, EA, PX MODEL

VOLTAGE

SELECTOR

91

LED ON/OFF

DOUT

3

RY HP

RY FRONT A

FRONT B

RY CENTER
RY WOOFER

RY REAR

58

URESET

B

ABUS A1 IN

63

I/O

BUFFER

Q180

ABUS OUT

67

FLOURESCENT

INDICATOR TUBE

FL101

29

DIN

26

LAT

34

CLK

24

CLR

4LS29

CLK

5CL30

DIN FL DAT

24

FL CLK21FL LAT24FL CLEAR

25

SPEAKER

SWITCH

FUNCTION

KEY

SP B73SP A72AD KEY6

44

MUTING

S102

6

FUNCTION

KEY

AD KEY1

38

S106,110,114,118
S122,126,128,130

FUNCTION

KEY

AD KEY2

39

S105,109,113,117
S121,125,127,129

FUNCTION

KEY

AD KEY3

40

S104,108,112
S116,120,124

FUNCTION

KEY

AD KEY4

41

S103,107,111
S115,119,122

FUNCTION

KEY

AD KEY5

43

S140-145,147 S132,133

S135-139,146

S134

49

MD0

87

LED BASS B

89

LED SOUND FIELD

92

LED DOLBY DIGITAL

LED

DRIVE

D100,108
D119,122

Q107,108
Q119,122

14

LED SUR

15

LED EQ

16

LED INDEX

LED

DRIVE

D104-106

Q103,104

Q106

90

LED MUTE

LED

DRIVE

D101

Q102

5

LED TV/DBS

4

LED DVD/LD

3

LED V3

LED

DRIVE

D111-113
D116-118

Q111-113
Q118-116

8

LED CD

9

LED TUNER

10

LED PHONO

7

LED MD/DAT

6

LED TAPE

LED

DRIVE

D114,115

Q114,115

2

LED V21LED V1

LED

DRIVE

D109,110

Q109,110

VIDEO 294VIDEO 1

93

M BUS96TV

95

IC254

IC254

UP

55

DOWN

56

LED VOL

88

873

2

MOTOR

DRIVE

IC251

IC106

UP

DOWN

LED VOL

B

51

MD2

20

SINO

19

SOTO

61

UDATA

62

UCLOCK

60

UMREQ

59

USEQ

USREQ

UMREQ

UCLOCK

UDATA

SOTO

SINO
MD2
MD0

82XO83

XI

X101

VS901

IC105IC104

FL DRIVE FL DRIVE

RY POWER

S-LINK

EXCEPT
E, EA, PX
MODEL

STR-DE925/V919

— 15 — — 16 —

3-5. SCHEMATIC DIAGRAM — AMP SECTION —

, PX

, PX

, PX

STR-DE925/V919

— 19 — — 20 —

3-7. SCHEMATIC DIAGRAM — VIDEO SECTION —

• See pages 61 for IC Block Diagrams.

(Page27)

(Page31)