Sony STR-DE725 - Fm Stereo/fm-am Receiver User manual

STR-DE725

US Model

SERVICE MANUAL

MICROFILM

— Continued on next page —

SPECIFICATIONS

Manufactured under license from 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

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION:

With 8 ohm loads, both channels driven, from 20 - 20,000 Hz; rated

100 watts per channel minimum RMS power, with no more than

0.09% total harmonic distortion from 250 milliwatts to rated output .

Amplifier section

POWER OUTPUT

Stereo mode

(8 ohms 20 Hz –20 kHz, THD 0.09%)

100 W + 100 W

Surround mode

(8 ohms at 1 kHz, THD 0.8%)

Front: 100 W/ch

Centera): 100 W

Reara): 100 W/ch

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

sound output.

Dynamic power output

155 W + 155 W, 8 ohms

220 W + 220 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 and VIDEO 2 :

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 and VIDEO 2 :

Sensitivity: 150 mV

Impedance: 50 kilohms

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

b)78’ IHF

c)Weighted network, input level

Inputs (Digital)

DVD/LD:

Sensitivity: –

Impedance: –

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

Outputs

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

BASS BOOST

+6 dB at 70 Hz

— 2 —

Sampling Frequency

48 kHz

EQ

BASS:

100 Hz ~ 1.0 kHz (21 steps)

MID:

500 Hz ~ 5.0 kHz (21 steps)

TREBLE:

1.0 kHz ~ 10 kHz (21 steps)

Gain levels:

±10 dB, 1 dB step

FM tuner section

Tuning range

87.5 - 108.0 MHz

Antenna terminals

75 ohms, unbalanced

Sensitivity

Mono: 18.3 dBf, 4.5 µV

Stereo: 38.3 dBf, 45 µV

Usable sensitivity

11.2 dBf, 2 µV (IHF)

S/N

Mono: 76 dB

Stereo: 70 dB

Harmonic distortion at 1 kHz

Mono: 0.3 %

Stereo: 0.5 %

Separation

45 dB at 1 kHz

Frequency response

30 Hz - 15 kHz +0.5/-2 dB

Selectivity

60 dB at 400 kHz

AM tuner section

Tuning range

With 10-kHz tuning scale:

530 - 1710 kHzd)

With 9-kHz tuning scale:

531 - 1710 kHzd)

Antenna

Loop antenna

Usable sensitivity

50 dB/m (at 1,000 kHz or 999 kHz)

S/N

54 dB (at 50 mV/m)

Harmonic distortion

0.5% (50 mV/m, 400 kHz)

Selectivity

At 9 kHz: 35 dB

At 10 kHz: 40 dB

d)You can change the AM tuning scale to 9 kHz. After tuning in any AM

station, turn off the receiver. Hold down the TUNING + button and

press the 1/u button. All preset stations will be erased when you

change the tuning scale. To reset the scale to 10 kHz, repeat the

procedure.

Video section

Input

1 Vp-p 75 ohms

Outputs

1 Vp-p 75 ohms

General

System

Tuner section:

PLL quartz-locked digital synthesizer system

Preamplifier section:

Low- noise NF type equalizer

Power amplifier section:

Pure-complementary SEPP

Power requirements

120 V AC, 60 Hz

Power consumption

290 W

AC outlets

2 switched, total 100 W

Dimensions

430 ×

355 × 157.5 mm

(17 ×

14 × 61/4 in.)

including projecting parts and controls

Mass (Approx.)

10.5 kg (23 lb 3 oz)

Supplied accessories

• FM wire antenna (1)

• AM loop antenna (1)

• Remote commander RM-PP401 (remote) (1)

• Carbon-ZINC dry batteries (2)

Design and specifications are subject to change without notice.

— 3 —

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH

MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS

LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE

COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS

APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS

PUBLISHED BY SONY.

TABLE OF CONTENTS

After correcting the original service problem, perform the

following safety checks 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

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 microampers).

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 2V AC range are suitable. (See

Fig. A)

SAFETY CHECK-OUT

To Exposed Metal

Parts on Set

0.15

µ

F 1.5k

Ω

AC

voltmeter

(0.75V)

Earth Ground

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

1. GENERAL ······································································ 4

2. TEST MODE····························································6

3. DIAGRAMS

3-1. Circuit Boards Location ····················································· 7

3-2. Block Diagram — Main Section — ··································· 9

3-3. Block Diagram — Power Section — ······························· 11

3-4. Printed Wiring Board — AMP Section — ······················· 13

3-5. Schematic Diagram — AMP Section — ·························· 15

3-6. Printed Wiring Board — Video Section — ······················ 17

3-7. Schematic Diagram — Video Section — ························· 19

3-8. Printed Wiring Board —AUDIO Section — ···················· 21

3-9. Schematic Diagram — AUDIO Section — ······················23

3-10. Printed Wiring Board — Input Section — ······················· 25

3-11. Schematic Diagram — Input Section — ·························· 27

3-12. Printed Wiring Board — Display Section — ··················· 29

3-13. Schematic Diagram — Display Section — ······················ 31

3-14. Printed Wiring Board — SPEAKER Section —·············· 33

3-15. Schematic Diagram — SPEAKER Section —················· 35

3-16. Printed Wiring Board — Power Section — ····················· 37

3-17. Schematic Diagram — Power Section — ························39

3-18. Printed Wiring Board

— DIGITAL (SIDE A) Section — ··································· 41

3-19. Printed Wiring Board

— DIGITAL (SIDE B) Section — ··································· 43

3-20. Schematic Diagram — DIGITAL Section (1/3) —··········45

3-21. Schematic Diagram — DIGITAL Section (2/3) —··········47

3-22. Schematic Diagram — DIGITAL Section (3/3) —·········· 49

3-23. IC Pin Function Description ············································ 51

3-24. IC Block Diagrams ··························································· 61

4. EXPLODED VIEWS

4-1. Front Panel Section ·························································· 64

4-2. Chassis Section································································· 65

5. ELECTRICAL PARTS LIST ··································· 66

— 4 —

SECTION 1

GENERAL

LOCATION AND FUNCTION OF CONTROLS

[FRONT PANEL]

11/u (POWER) button

2MULTI CURSOR CONTROL

3SURROUND, EQUALIZER, INDEX indicators

4DIRECT TUNING button

5VIDEO 1 button

6MULTI CHANNEL DECODING indicator

7TV/DBS button

8SOUND FIELD GENRE button

9SOUND FIELD MODE button

0SOUND FIELD, EQ, BASS BOOST indicators

!¡ MASTER VOLUME control

!™ BALANCE control

!£ MUTING button

!¢ SOUND FIELD ON/OFF button

!∞ BASS BOOST button

!§ EQ ON/OFF button

!¶ INPUT MODE button

!• PHONO button

!ª DVD/LD

@º TUNER button

@¡ CD button

@™ VIDEO 2 button

@£ TAPE/MD button

@¢ Numeric buttons

@∞ SHIFT button

@§ DISPLAY button

@¶ MEMORY button

@• FM/AM button

@ª FM MODE button

#º SLEEP button

#¡ PHONES jack

#™ TUNING +, – buttons

#£ SPEAKERS A, B switche

#¢ PRESET TUNING +, – buttons

#∞ SET UP button

#§ CURSOR MODE button

1234567 8

90!¡

!™

!£!¢!∞

!§

!¶

!•

!ª

@º

@¡

@™

@£

@¢@∞

@§¿

@¶

@•

@ª

#º

#¡

#™

#£

#¢

#∞

#§

— 5 —

[REAR PANEL]

1DIGITAL

2ANTENNA (FM/AM)

3TV/LD

4DVD/LD

5VIDEO 2

6VIDEO 1

7MONITOR

8S-LINK

9WOOFER

0SPEAKERS (REAR)

!¡ SPEAKER (CENTER)

!™ WIRELESS REAR SPEAKER

!£ IMPEDANCE SELECTOR

!¢ AC power cord

!∞ AC OUTLET

!§ FRONT SPEAKERS (A/B)

!¶ SPEAKERS (FRONT)

!• CD

!ª PHONO

@º y SIGNAL GND

123

4567 8

90!¡!™

!£ !¢ !∞

@º !ª !• !¶ !§

— 6 —

SECTION 2

TEST MODE

FLUORESCENT INDICATOR TUBE TEST MODE

* All fluorescent segments are tested. When this test is activated,

all segments turn on at the same time, then each segment turns on

one after another.

* Procedure:

While depressing the SET UP and the SOUND FIELD MODE

buttons simultaneously, press the power 1/u button to turn on

the main power. All segments turn on at the same time, then each

segment turns on one after another.

FACTORY SET MODE

* All preset contents are reset to the default setting.

* Procedure:

While depressing the SET UP and the SOUND FIELD ON/OFF

buttons simultaneously, press the power 1/u button to turn on

the main power. The message FACTORY SET appears and the

present contents are reset to the default values.

ALL CLEAR MODE

* All preset contents are cleared when this mode is activated. Use

this mode before returning the product to clients upon completion

of repair.

* Procedure:

While depressing the DISPLAY and the SOUND FIELD ON/

OFF buttons simultaneously, press the power 1/u button to

turn on the main power. The machine enters the DEMO

mode.DEMO mode: Wait a while, then the demonstration starts.

If the power 1/u button is pressed often the demonstration has

started, the power is turned off, and the demonstration resumes if

the power 1/u button is pressed again.

ALL CLEAR mode; If the power 1/u button is pressed often

the machine enters the DEMO mode, but before the demonstration

starts, the display is turned off. Press 1/u again. No response is

returned. Then press 1/u again. The preset data is cleared and

the machine enters the normal power-on state.

SOUND FIELD CLEAR MODE

* The preset sound field is cleared when this mode is activated.

Use this mode before returning the product to clients upon

completion of repair.

* Procedure:

While depressing the SOUND FIELD ON/OFF button, press

the power 1/u button to turn on the main power. The message

SURR CLEAR! appears and initialization is performed.

AM CHANNEL STEP 9 kHz/10 kHz

SELECTION MODE

* Either the 9 kHz step or 10 kHz step can be selected for the AM

channel step.

* Procedure:

Set the FUNCTION to AM. Turn off the main power.

While depressing the TUNING+ button or the PRESET TUNING

+ button, press the power 1/u button to turn on the main power.

Either the message AM 9kHz STEP or AM 10kHz STEP appears.

Select the desired step.

DSP TEST MODE

* Procedure:

While depressing the SET UP and the SOUND FIELD GENRE

buttons simultaneously, press the power 1/u button to turn on

the main power. The message DSP NO ERROR or DSP ERROR.

STR-DE725

— 7 — — 8 —

SECTION 3

DIAGRAMS

3-1. CIRCUIT BOARDS LOCATION

For schematic diagrams.

Note:

• All capacitors are in µF unless otherwise noted. pF: µµF

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

specified.

• % : indicates tolerance.

•2: nonflammable resistor.

•1: fusible resistor.

•C: panel designation.

•U: B+ Line.

•V: B– Line.

•H: adjustment for repair.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

No mark : FM

• Voltages are taken with a VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal production

tolerances.

• Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

F: FM

J: CD

c: DIGITAL

I: PHONO

THIS NOTE IS COMMON FOR PRINTED WIRING

BOARDS AND SCHEMATIC DIAGRAMS.

(In addition to this necessary note is printed in each

block.)

• Waveform

1 IC1201 (™ (XO)

2 IC1101 @¶ (X OUT)

3 IC1101 @ª (CLK OUT)

4 IC102 *™ (XO)

4.0Vp-p

5.5Vp-p

5.4Vp-p

3.0Vp-p

4MHz

24.576MHz

12.288MHz

4.0MHz

For printed wiring boards.

Note:

•X: parts extracted from the component side.

•®: Through hole.

•b: Pattern from the side which enables seeing.

The components identified by mark ! or dotted

line with mark ! are critical for safety.

Replace only with part number specified.

SW board

H.P board

SP SW board

DISPLAY board

BALANCE board

SP board REAR AMP board

AC board

AMPLIFIER board

VIDEO board

TUNER board

D.IN/OUT boar

d

DIGITAL board

AUDIO board

INPUT board

JOINT board

VOLUME board

L.B board

REG board

LED board

STR-DE725

— 9 — — 10 —

3-2. BLOCK DIAGRAM – MAIN SECTION –

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

MD/DAT

M OUT

1

J201

MONITOR

J202

J203

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

CLK

15

DI

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

MUP

DOWN

V-A

81

SYSTEM

CONTROL

IC1201

V-B82

V-E

83

V INH

80

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

CE

13

CLK

15

DI

14

SELECTOR

IC303

S LAT

S CLK

S DATA

6

8

L

TAPE INPUT

LOUTPUT

J303

LTV/DBS

L

J305

VIDEO2

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

INPUT

OUTPUT

INPUT

OUTPUT

DVD/LD

TV/DBS

INPUT

15

12

3

2

1

SELECT

SWITCH

IC1005

5

B

C

A11

10

9

B

C

A

IC1006

76

SWDT

111

A

110

B

109

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

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

5EXTMEM

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

6

CS

18

RESET

36

15

SCDOUT

17

CS

20

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

XHDRD

10

XHDCS

14

XRST

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

3

CS

7

PD

108

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

CDTI

43

CCLK

42

CS

41

PD

17

SDTO

9

MCLK1

39 BCLK

4LRCK

5

SDTI 1

6SDTI 2

7SDTI 3

8

LIN+

30

IC304 IC1104 IC1104

23

L OUT3

IN

14

DATA

9CLK

8LAT

10

15

OUT

DATA

CLK

LAT

IC414

IN

3

DATA

9CLK

8LAT

10

2

OUT

DATA

CLK

LAT

IN

14 15

OUT

IC407 IC410

IC410

IN

14

DATA

9CLK

8LAT

10

15

OUT

DATA

CLK

LAT

IC406

MUTE

Q303

IC409

IC405

24

R OUT3

25

L OUT2

IC1104

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 STB

50

EV 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

92

XO

93

XI

X1201

4MHz

64

STOP STOP

: DIGITAL

16

STR-DE725

— 11 — — 12 —

3-3. BLOCK DIAGRAM – POWER SECTION –

RELAY

DRIVE

Q601

LIMITER

Q504

14

5

15

6

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

5

15

6

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

POWER

CONT

IC901 58

3

6

DELAY

+B SW

Q902

SWITCH

Q747,748

D801

SWITCH

Q618

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

CNP901

AC IN

L

R

:FM

:CD

D

• Signal Path

• RCH is omitted

IN

W6

14 VCC

2+VE 3-VE

1

+18V

REG

IC702

3

F803

F804

1

+3.3V

REG

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

47

STOP

URESET

S-LINK

J204

1 MUT

D1202

D1203

2

-15V

REG

IC402

3

+15V

REG

IC401

1

+12V

REG

IC403

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

T901

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

4

LS

29

CLK

5

CL

30

DIN FL DAT

24

FL CLK

21

FL LAT

24

FL CLEAR

25

SPEAKER

SWITCH

FUNCTION

KEY

SP B

73

SP A

72

AD KEY6

44

MUTING

S102

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 V2

1

LED V1

LED

DRIVE

D109,110

Q109,110

UP

55

DOWN

56

LED VOL

88

8

7

3

2

MOTOR

DRIVE

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

82

XO

83

XI

X101

IC105IC104

FL DRIVE FL DRIVE

RY POWER

STR-DE725

1

11

R

NLPI

O

X

1-670-027-

11

(12)

1-670-006- 11

(13)

1-670-025- 11

(12)

BCE BCE

BCE

BCE BCE

Q506 Q505 Q507 Q606 Q605 Q607 Q556 Q555 Q557

1

2

EEEEEE

E

EE

1

3

1

3

13

MQ

1

7

EE

E

1

6

E

51

EE

E

EE

E

B

A

B

A

B

A

AMPLIFIER BOARD

JOINT BOARD H.P BOARD

TM501

FRONT

SPEAKERS

J701

PHONES

R

L

1

3

16

(Page 34) (Page 34) (Page 37)

(Page 26)

(Page 37) (Page 43)

(Page 33)

(Page 25)

(Page 33)

+

∼

−

D809

12

A

B

C

D

E

F

G

H

345678910111213

— 13 — — 14 —

3-4. PRINTED WIRING BOARD — AMP SECTION —

• Semiconductor Location

• See page 7 for Circuit Boards Location.

Ref. No. Location

D501 E-6

D502 E-6

D503 E-6

D504 E-6

D505 B-4

D506 B-4

D545 B-3

D546 E-3

D547 D-12

D548 D-12

D549 D-12

D551 E-11

D552 E-11

D553 E-11

D554 E-11

D555 C-4

D556 B-4

D601 E-8

D602 E-8

D603 E-8

D604 E-9

D608 C-11

D647 D-3

D648 E-4

D801 C-8

D802 D-10

D803 C-9

D804 D-10

D805 D-10

D806 B-10

D807 D-8

D809 C-12

IC809 C-12

Q504 E-6

Q505 E-6

Q506 E-5

Q507 F-7

Q508 E-7

Q509 B-4

Q510 B-4

Q511 B-4

Q546 B-11

Q547 D-12

Q548 D-12

Q549 D-12

Q554 E-11

Q555 E-11

Q556 E-10

Q557 E-12

Q558 E-12

Q559 C-4

Q560 B-4

Q561 B-4

Q596 B-11

Q601 B-11

Q604 E-9

Q605 E-8

Q606 E-8

Q607 E-9

Q608 E-9

Q612 E-4

Q613 D-4

Q615 E-3

Q616 D-3

Q617 D-3

Q618 D-3

Q801 D-8

STR-DE725

— 15 — — 16 —

3-5. SCHEMATIC DIAGRAM — AMP SECTION —

The components identified by mark ! or dotted

line with mark ! are critical for safety.

Replace only with part number specified.

STR-DE725

— 17 — — 18 —

3-6. PRINTED WIRING BOARD — VIDEO SECTION — • See page 7 for Circuit Boards Location.

Ref. No. Location

D201 C-2

D202 C-2

IC201 C-2

IC202 C-4

• Semiconductor

Location

1-670-003-

11

(13)

VIDEO BOARD

CTRL A1

C

S-LINK

VIDEO OUT

MONITOR

VIDEO OUT VIDEO IN

VIDEO 1

VIDEO OUT VIDEO IN

VIDEO 2

VIDEO IN VIDEO IN

DVD/LD

TV/DBS

1

18

916

10 2

11 1

3

(Page 29)

16

12

A

B

C

D

E

3456789

STR-DE725

— 19 — — 20 —

3-7. SCHEMATIC DIAGRAM — VIDEO SECTION — • See pages 61 for IC Block Diagrams.

STR-DE725

— 21 — — 22—

3-8. PRINTED WIRING BOARD — AUDIO SECTION — • See page 7 for Circuit Boards Location.

Ref. No. Location

IC303 G-8

IC408 D-6

IC409 C-6

IC410 B-6

• Semiconductor

Location

EK

S

D

F

A

1-670-011-

11

(13)

1-670-015-

11

(13)

1-670-000-

11

(13)

1-670-001-

11

(13)

AUDIO BOARD

VOLUME

BOARD

BALANCE BOARD

TUNER BOARD

IN

PHONO

R

L

IN

CD

R

L

REC OUT

MD/DAT

R

L

IN

R

L

TAPE

R

L

IN

R

L

J305J304

BALANCE

MASTER VOLUME

4

1

30

16

115

1

110

11

5

1

C382

8

18

16

R108

(Page 25)

(Page 43)

(Page 26)

(Page 29) (Page 25) TM301

12

A

B

C

D

E

F

G

H

I

J

3456789101112

STR-DE725

— 23 — — 24 —

3-9. SCHEMATIC DIAGRAM — AUDIO SECTION —

STR-DE725

— 25 — — 26 —

3-10. PRINTED WIRING BOARD — INPUT SECTION — • See page 7 for Circuit Boards Location.

Ref. No. Location

D301 F-10

IC301 C-4

IC302 D-4

IC304 E-6

IC401 C-12

IC402 B-12

IC403 D-12

IC404 E-4

IC405 E-12

IC406 D-12

IC407 D-12

IC414 B-11

IC415 C-11

IC416 D-11

IC501 C-9

IC601 D-7

IC701 C-7

Q301 F-11

Q302 E-11

Q303 E-11

Q304 D-11

Q352 E-11

Q353 D-10

Q354 D-11

Q501 C-10

Q503 C-10

• Semiconductor

Location

1-670-026-

11

(12)

INPUT BOARD

IN

PHONO

R

L

R

L

R

L

R

L

IN

CD

REC

OUT

TAPE/MD

G

ID

E

R H

VK F

1

10

1

3

12

EEE

E

18

9

16

18

9

16

18

9

16 1

3

1

3

1

18

3

18

3

1

115

16

30

15

5

4

8

1

115

113

16

115

1

14

15

E

16

(Page 14) (Page 34) (Page 22) (Page 14)

(Page 21)

(Page 43)(Page 22)(Page 22) (Page 18)

12

A

B

C

D

E

F

345678910111213

STR-DE725

— 27 — — 28 —

3-11. SCHEMATIC DIAGRAM — INPUT SECTION — • See page 61 for IC Block Diagrams.

The components identified by mark ! or dotted

line with mark ! are critical for safety.

Replace only with part number specified.

STR-DE725

— 29 — — 30 —

3-12. PRINTED WIRING BOARD — DISPLAY SECTION — • See page 7 for Circuit Boards Location.

Ref. No. Location

D100 H-2

D101 E-2

D102 B-13

D103 B-9

D104 C-12

D105 C-12

D106 C-12

D108 C-3

D109 J-6

D110 J-7

D111 J-7

D112 J-8

D113 J-9

D114 I-6

D115 I-7

D116 I-7

D117 I-8

D118 I-9

D119 D-3

D120 H-14

D121 H-14

D122 C-3

D180 B-3

IC101 C-4

IC102 D-6

IC103 C-1

IC104 D-8

IC105 C-7

Q101 C-4

Q102 B-4

Q103 B-11

Q104 B-11

Q105 C-4

Q106 B-11

Q107 B-6

Q108 B-4

Q109 B-11

Q110 B-11

Q111 B-12

Q112 B-12

Q113 B-12

Q114 B-12

Q115 B-12

Q116 B-12

Q117 B-13

Q118 B-13

Q119 B-4

Q120 B-4

Q122 B-3

Q180 B-3

• Semiconductor

Location

1-670-009- 11

(13)

1-670-007-

11

(13)

1-670-014-

11

(13)

1-670-008-

11

(13)

1-670-010-

11

(13)

DISPLAY BOARD

SW BOARD

SP SW BOARD

LED BOARD

L.B

BOARD

12(MULTI CHANNEL DECODING)

14 14

SHIFT

MUTING

TAPE/MD CD TUNER PHONO

INPUT

MODE CURSOR MODE

SET UP

MEMORY

DISPLAY

(INDEX)

(EQUALIZER)

(SURROUND)

(SOUND FIELD)

(EQ)

(BASS BOOST)

FM/AM FM MODE SLEEP

TUNING

PRESET

TUNING

SPEAKERS

GENRE MODE

TV/DBSDVD/LDVIDEO 2VIDEO 1

DIRECT

TUNING

0987

6

2 3 4 5

1

SOUND FIELD

SOUND

FIELD

ON/OFF

EQ

ON/OFF

BASS

BOOST

14

1

5

B A A+BOFF

B

C

A

4

1

14

9

41 41

41

EE

EEE EEE EEE

64

MULTI

CURSOR

CONTROL

C192

C191

JW231

1

5

1

1100

81

80

51 50

31

30

E

13

CNS107

12

2 13

1 2 3 4

16

R122

C124

C123

(Page 43)

(Page 17)

(Page 21)

111

10

2

RR22

RR23

RR21

12

A

B

C

D

E

F

G

H

I

J

3456789101112131415

STR-DE725

— 31 — — 32 —

3-13. SCHEMATIC DIAGRAM — DISPLAY SECTION — • See page 8 for Waveform. • See page 51 for IC Pin Function Description. • See page 61 for IC Block Diagrams.

The components identified by mark ! or dotted

line with mark ! are critical for safety.

Replace only with part number specified.

STR-DE725

— 33 — — 34 —

3-14. PRINTED WIRING BOARD — SPEAKER SECTION — • See page 7 for Circuit Boards Location.

Ref. No. Location

• Semiconductor

Location

D543 G-7

D605 F-8

D606 F-9

D607 F-12

D649 F-6

D701 B-7

D702 B-7

D703 B-7

D704 B-7

D705 G-6

D706 F-6

D749 E-5

D751 B-3

D752 B-3

D753 B-3

D754 B-3

IC702 F-10

Q544 F-7

Q609 E-9

Q610 F-9

Q611 F-9

Q645 E-8

Q704 B-7

Q705 B-7

Q706 B-7

Q707 B-6

Q708 B-8

Q710 F-6

Q745 F-6

Q747 E-9

Q748 E-9

Q754 B-3

Q755 A-3

Q756 A-4

Q757 A-2

Q758 B-2

H

N

M

1-670-002-

11

(13)

1-670-035-

11

(13)

REAR AMP BOARD

EE

E

Q

UV

X

1

56

1

4

SP BOARD

WOOFER

REAR

CENTER IMPEDANCE SELECTOR

4-8

TM701

WIRELESS REAR

SPEAKER

13

E

BC E BC E BC E B

BCCE

E

BCE

16

1

3

(Page 13)

(Page 14)

(Page 14) (Page 13)(Page 43)(Page 25)

(Page 26)

12

A

B

C

D

E

F

G

345678910

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Sony STR-DE725 - Fm Stereo/fm-am Receiver User manual

Sony STR-DE725 - Fm Stereo/fm-am Receiver User manual

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