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

Brand: Sony

Model: STR-DE725 - Fm Stereo/fm-am Receiver

Category: Receiver

Type: 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

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

F 1.5k

Ω

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

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 –

DATA

75Ω

TUNED

TMUTE

STEREO

DATA

CLK

L OUT

R OUT

TUNER UNIT

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

J201

MONITOR

J202

J203

VIDEO 2

VIDEO 1 V1 IN

V1 OUT

V2 IN

V2 OUT

VEE

VCC

SW1

SW2

SW3

SW4

3 2

VIDEO SELECT

IC201

-5V

REG

IC202

-15V

+5V

CONTROL

CLK

AUDIO SELECT

IC301

MUTE

Q302

S LAT

S CLK

S DATA

EQ AMP

IC302 MUTE

Q304

IC407

MUTE

Q354

RY301

RELAY

DRIVE

Q301

IC408

RV401

VOLUME

RV402

BALANCE L

MUP

DOWN

V-A

SYSTEM

CONTROL

IC1201

V-B82

V-E

V INH

AUTO STOP

STEREO

TUNER MUTE

S DATA

S CLK

S LAT

TUNED

STEREO

TMUTE

DATA

CLOCK

LATCH

: PHONO

J299

VIDEO

LAUDIO

VIDEO 3

V3 IN

CONTROL

CLK

SELECTOR

IC303

S LAT

S CLK

S DATA

TAPE INPUT

LOUTPUT

J303

LTV/DBS

J305

VIDEO2

INPUT

LOUTPUT

VIDEO1 OUTPUT

LINPUT

J304

TM301

ANTENNA

4 14 15 13 2 3 1

LINPUT

DVD/LD

IR LINK

DET

IC001

DVD/LD

INPUT

OUTPUT

INPUT

OUTPUT

DVD/LD

TV/DBS

INPUT

SELECT

SWITCH

IC1005

A11

IC1006

SWDT

111

110

109

SCLK

XLAT

RESET

SRDT

DIGITAL AUDIO

I/F RECEIVER

IC1101

D IN

RESET

SWDT

40 SCLK

42 XLAT

X1101

24.576MHz

D OUT

CLK

BCK

LRCK

ERROR

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

CLK

SDATA1

22 SDATA2

MCLK

SCK

43 SCLK1

25 SCLK2

RCLK

42 LRCLK1

26 LRCLK2

DOLBY

DIGITAL AUDIO DECODER

IC1301

AUDATA0 40

AUDATA1 39

AUDATA2

D0-7

SCCLK

SCCLK SCD IN

RESET

SCDOUT

RESET

INTREQ 19

SCDOUT

INTREQ

SCDIN

Q1204

Q1205

IC1202

D1201

ANALOG/DIG

ERROR

A0-7

D0-7

SRAM

IC1402

SIA

117 SIB

118 SIC

119

XWE

74 XOE

25 32

.HD0

HD7

D0-7

AD0 AD7 21

XHDWR

HA0

AUDIO DSP

IC1401

HA0

XHDWR

XHDRD

XHDCS

XRST

XHDRD

XHDCS

HRDY

XRST

HRDY 5

SOD

CDTO

IC1202 IC1202

Q1206

Q1207

CDTI

CCLK

108

RY DIRECT PASS

SOA

CLK1

99 LRCK

115 BCK0

113 3

SOB 4

SOC

L OUT1

LIN-

AUDIO CODEC

IC1103

CDTO

CDTI

CCLK

SDTO

MCLK1

39 BCLK

4LRCK

SDTI 1

6SDTI 2

7SDTI 3

LIN+

IC304 IC1104 IC1104

L OUT3

DATA

9CLK

8LAT

OUT

DATA

CLK

LAT

IC414

DATA

9CLK

8LAT

OUT

DATA

CLK

LAT

14 15

OUT

IC407 IC410

IC410

DATA

9CLK

8LAT

OUT

DATA

CLK

LAT

IC406

MUTE

Q303

IC409

IC405

R OUT3

L OUT2

IC1104

IC1105

IC1106

VOL CONT

IC416

VOL CONT

IC415

VOL CONT

LED

DRIVE

Q120

LED VOL

MUTE

CONT

Q1201

FUN MUTE

Q1202

Q1203

U DATA

DISP DATA 55

DISP CLK 51

DISP MR

53SREQ

SOTO 9

SINO 87

MD2 89

MD0

90RESET

U CLOCK

U MREQ

U SREQ

SOTO

SINO

MD2

MD0

U REST

107

RY POWER RY POWER

EV STB

EV CLK

EV DATA

LAT

CLK

DATA

AC MUTE

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

X1201

4MHz

STOP STOP

: DIGITAL

STR-DE725

— 11 — — 12 —

3-3. BLOCK DIAGRAM – POWER SECTION –

RELAY

DRIVE

Q601

LIMITER

Q504

VEE

VCC

MUT

+VE

-VE

13 VCC

POWER AMP(L)

IC501

-B

LIMITER

Q505

BOOSTER

Q506

BOOSTER

Q507 CUR DET

Q508

PROTECTOR

Q509,510

Q511

LIMITER

Q604

15 12

VEE

+VE

-VE

13 VCC

POWER AMP(C/W)

IC601

-B

LIMITER

Q605

BOOSTER

Q606

BOOSTER

Q607 CUR DET

Q608

PROTECTOR

Q609,610

Q611

LIMITER

Q704

MUTE

Q501,503

VEE

VCC

MUT

+VE

-VE

13 VCC

POWER AMP(SL)

IC701

-B

LIMITER

Q705

BOOSTER

Q706

BOOSTER

Q707 CUR DET

Q708

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

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

DELAY

+B SW

Q902

SWITCH

Q747,748

D801

SWITCH

Q618

INV SW

Q617

SWITCH

Q613,616

SWITCH

Q612,615

PROTECTOR

Q547-549

+5.6V

F801

F802

D802-805

-B

IMPEDANCE

SELECTOR

S501

F901

D901-904

CNP901

AC IN

:FM

:CD

• Signal Path

• RCH is omitted

14 VCC

2+VE 3-VE

+18V

REG

IC702

F803

F804

+3.3V

REG

+5V

REG

IC809 +24V

-24V

REG

IC809

IC801

IC802

CNJ901

T902

MODE CONTROL

IC102

STOP

AC MUTE

PROTECTOR

REMOTO

CONTROL

RECEIVER

IC101

SIRCS Q101

RESET

Q105

RESET

POWER

S131

POWER KEY

F2 F1

JW925

STOP

URESET

S-LINK

J204

1 MUT

D1202

D1203

-15V

REG

IC402

+15V

REG

IC401

+12V

REG

IC403

+5V

REG

IC404

-15V

+15V

TU +12V

TU +5V

+32V

REG

+32V

Q801

D808

F805

+3.3V

REG

IC803

D5V

D3.3V

T901

LED ON/OFF

DOUT

RY HP

RY FRONT A

FRONT B

RY CENTER

RY WOOFER

RY REAR

URESET

ABUS A1 IN

I/O

BUFFER

Q180

ABUS OUT

FLOURESCENT

INDICATOR TUBE

FL101

DIN

LAT

CLK

CLR

CLK

DIN FL DAT

FL CLK

FL LAT

FL CLEAR

SPEAKER

SWITCH

FUNCTION

KEY

SP B

SP A

AD KEY6

MUTING

S102

FUNCTION

KEY

AD KEY1

S106,110,114,118

S122,126,128,130

FUNCTION

KEY

AD KEY2

S105,109,113,117

S121,125,127,129

FUNCTION

KEY

AD KEY3

S104,108,112

S116,120,124

FUNCTION

KEY

AD KEY4

S103,107,111

S115,119,122

FUNCTION

KEY

AD KEY5

S140-145,147 S132,133

S135-139,146 S134

MD0

LED BASS B

LED SOUND FIELD

LED DOLBY DIGITAL

LED

DRIVE

D100,108

D119,122

Q107,108

Q119,122

LED SUR

LED EQ

LED INDEX

LED

DRIVE

D104-106

Q103,104

Q106

LED MUTE

LED

DRIVE

D101

Q102

LED TV/DBS

LED DVD/LD

LED V3

LED

DRIVE

D111-113

D116-118

Q111-113

Q118-116

LED CD

LED TUNER

LED PHONO

LED MD/DAT

LED TAPE

LED

DRIVE

D114,115

Q114,115

LED V2

LED V1

LED

DRIVE

D109,110

Q109,110

DOWN

LED VOL

MOTOR

DRIVE

IC106

DOWN

LED VOL

MD2

SINO

SOTO

UDATA

UCLOCK

UMREQ

USEQ

USREQ

UMREQ

UCLOCK

UDATA

SOTO

SINO

MD2

MD0

X101

IC105IC104

FL DRIVE FL DRIVE

RY POWER

STR-DE725

NLPI

1-670-027-

(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

EEEEEE

AMPLIFIER BOARD

JOINT BOARD H.P BOARD

TM501

FRONT

SPEAKERS

J701

PHONES

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

(Page 26)

(Page 37) (Page 43)

(Page 33)

(Page 25)

(Page 33)

∼

−

D809

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-

(13)

VIDEO BOARD

CTRL A1

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

916

10 2

11 1

(Page 29)

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

1-670-011-

(13)

1-670-015-

(13)

1-670-000-

(13)

1-670-001-

(13)

AUDIO BOARD

VOLUME

BOARD

BALANCE BOARD

TUNER BOARD

PHONO

REC OUT

MD/DAT

TAPE

J305J304

BALANCE

MASTER VOLUME

115

110

C382

R108

(Page 25)

(Page 43)

(Page 26)

(Page 29) (Page 25) TM301

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-

(12)

INPUT BOARD

PHONO

REC

OUT

TAPE/MD

R H

VK F

EEE

16 1

115

113

115

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

(Page 21)

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

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-

(13)

1-670-014-

(13)

1-670-008-

(13)

1-670-010-

(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

2 3 4 5

SOUND FIELD

SOUND

FIELD

ON/OFF

BASS

BOOST

B A A+BOFF

41 41

EEE EEE EEE

MULTI

CURSOR

CONTROL

C192

C191

JW231

1100

51 50

CNS107

2 13

1 2 3 4

R122

C124

C123

(Page 43)

(Page 17)

(Page 21)

111

RR22

RR23

RR21

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

1-670-002-

(13)

1-670-035-

(13)

REAR AMP BOARD

SP BOARD

WOOFER

REAR

CENTER IMPEDANCE SELECTOR

4-8

TM701

WIRELESS REAR

SPEAKER

BC E BC E BC E B

BCCE

BCE

(Page 13)

(Page 14)

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

(Page 26)

345678910

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

Brand: Sony

Model: STR-DE725 - Fm Stereo/fm-am Receiver

Category: Receiver

Type: User manual

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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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