Sony STR-DE845 User manual

SERVICE MANUAL

FM STEREO/FM-AM RECEIVER

US Model

Canadian Model

STR-DE845/DE945

E Model

Australian Model

Chinese Model

PX Model

STR-DE845

SPECIFICATIONS

STR-DE845/DE945

Photo: STR-DE945

Manufactured under license from Dolby labora-

tories. “Dolby”, “AC-3”, “Pro Logic” and the double-

D symbol ; are trademarks of Dolby Laborato-

ries.

Manufactured under license from Digital Theater

Systems, Inc. US Pat. No. 5,451,942 and other

worldwide patents issued and pending. “DTS” an

d “DTS Digital Surround” are trademarks of Digi-

tal Theater Systems, Inc.

– Continued on next page –

AUDIO POWER

SPECIFICATIONS

POWER OUTPUT AND

TOTAL HARMONIC

DISTORTION:

With 8 ohm loads, both

channels driven, from 20 -

20,000 Hz; rated 110 watts

(STR-DE945) and 100 watts

(STR-DE845) 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

Models of area code U, CA

Rated Power Output at Stereo Mode

(8 ohms 20 Hz – 20 kHz, THD 0.09 %)

STR-DE945: 110 W + 110 W

STR-DE845: 100 W + 100 W

Reference Power Output

(8 ohms 1 kHz, THD 0.7 %)

STR-DE945: FRONT:

1)

110 W + 110 W

CENTER

1)

: 110 W

REAR

1)

:

110 W + 110 W

STR-DE845: FRONT

1)

:

100 W + 100 W

CENTER

1)

: 100 W

REAR

1)

:

100 W + 100 W

Models of other area code

STR-DE845:

Rated Power Output at Stereo Mode

(8 ohms 1 kHz, THD 0.7 %)

100 W + 100 W

2)

90 W + 90 W

3)

Reference Power Output

(8 ohms 1 kHz, THD 0.7 %)

FRONT

1)

:

100 W + 100 W

CENTER

1)

: 100 W

REAR

1)

:

100 W + 100 W

(8 ohms 20 Hz – 20 kHz, THD 0.09 %)

FRONT

1)

:

95 W + 95 W

CENTER

1)

: 95 W

REAR

1)

:

95 W + 95 W

(8 ohms 1 kHz, THD 10 %)

FRONT

1)

:

135 W + 135 W

CENTER

1)

: 135 W

REAR

1)

:

135 W + 135 W

1) Depending on the sound field settings and

the source, there may be no sound output.

2) Measured under the following conditions:

Area code Power requirements

AU, E 240 V AC, 50 Hz

CN, SP 230 V AC, 50 Hz

3) Measured under the following conditions:

Area code Power requirements

CN 220 V AC, 50 Hz

Frequency response

PHONO: RIAA

equalization curve

±0.5 dB

CD, TAPE, MD/DAT,

MD/TAPE, DVD/

LD, TV/SAT,

VIDEO 1, 2, and

VIDEO 3:

10 Hz – 50 kHz

+0.5/–2 dB (with

sound field,

equalizer, and bass

boost bypassed)

Inputs (Analog)

PHONO:

Sensitivity: 2.5 mV

Impedance: 50

kilohms

S/N

4)

: 86 dB

(A, 2.5 mV

5)

)

5.1CH INPUT, CD,

TAPE, MD/DAT,

MD/TAPE, DVD/

LD, TV/SAT, VIDEO

1, 2, and VIDEO 3:

Sensitivity: 150 mV

Impedance:

50 kilohms

S/N

4)

: 96 dB

(A, 150 mV

5)

)

4) INPUT SHORT

5) Weighted network, input level

Inputs (Digital)

DVD/LD IN(Coaxial):

Sensitivity: –

Impedance: 75 ohms

S/N: 100 dB

(A, 20 kHz LPF)

DVD/LD IN, TV/SAT

IN, MD/DAT IN

(Optical):

Sensitivity: –

Impedance: –

S/N: 100 dB

(A, 20 kHz LPF)

Outputs TAPE, MD/DAT, MD/

TAPE; VIDEO 1, 2

(AUDIO OUT):

Voltage: 150 mV,

Impedance:

1 kilohms

SUB WOOFER:

Voltage: 2 V

Impedance:

1 kilohms

PHONES:

Accepts low- and

high-impedance

headphones

BASS BOOST +6 dB at 70 Hz

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

2

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH

MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS

LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE

COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS AP-

PEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-

LISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES

DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT

CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE

REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY

DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU

DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 ˚C during

repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or

unsoldering.

FM tuner section

Tuning range 87.5 - 108.0 MHz

Antenna terminals

75 ohms, unbalanced

Sensitivity Mono: 18.3 dBf,

2.2 µV/75 ohms

Stereo: 38.3 dBf,

22.5 µV/75 ohms

Usable sensitivity

11.2 dBf, 1 µV/75 ohms

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

Models of area code U, CA

With 10-kHz tuning

scale:

530 – 1710 kHz

6)

With 9-kHz tuning

scale:

531 – 1710 kHz

6)

Models of area code AU, CN, SP

With 9-kHz tuning

scale:

531 – 1602 kHz

Models of area code E

With 10-kHz tuning

scale:

530 – 1610 kHz

6)

With 9-kHz tuning

scale:

531 – 1602 kHz

6)

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

6) You can change the AM tuning scale to

9 kHz y 10 kHz. After tuning in any AM

station, turn off the receiver. Hold down the

TUNING + button and press the ?/1 button.

All preset stations will be erased when you

change the tuning scale. To reset the scale

to 10 kHz (or 9 kHz), repeat the procedure.

Video section

Inputs Video: 1 Vp-p 75 ohms

S-video:

Y: 1 Vp-p 75 ohms

C: 0.286 Vp-p

75 ohms

Outputs Video: 1 Vp-p 75 ohms

S-video:

Y: 1 Vp-p 75 ohms

C: 0.286 Vp-p

75 ohms

AC outlets

Models of area code U,

CA

2 switched,

total 120 W/1A

Models of area code

AU, SP

1 switched,

total 100 W

Models of area code E,

CN

2 switched,

total 100 W

Dimensions 430 × 158 × 378 mm

(17 × 6

1

/

4

× 15 in.)

including projecting

parts and controls

Mass (Approx.)

10.3 kg (22 lb 12 oz)

Supplied accessories

• FM wire antenna (1)

• AM loop antenna (1)

• LR6 (size-AA) alkaline batteries (3)

Models of area code U, CA only

• Audio/video/control S

connecting cord (1)

• Control S connecting cord (1)

STR-DE945 only

• Remote commander RM-LJ304

(remote) (1)

STR-DE845 only

• Remote commander RM-LP204

(remote) (1)

Design and specifications are subject

to change without notice.

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

Models of area code U,

CA

120 V AC, 60 Hz

Models of area code

CN, SP

220 – 230 V AC,

50/60 Hz

Models of area code AU

240 V AC, 50 Hz

Models of area code E

120/220/240 V AC,

50/60 Hz

Power consumption

Models of area code U

STR-DE945: 290 W

STR-DE845: 280 W

Models of area code CA

STR-DE945: 345 VA

STR-DE845: 335 VA

Models of area code

CN, SP

STR-DE845: 220 W

Models of area code AU

STR-DE845: 230 W

Models of area code E

STR-DE845: 320 W

• Abbreviation

AU : Australian model

CA : Canadian model

CN : Chinese model

MY: Malaysia model

SP : Singapore model

U : US model

3

MODEL IDENTIFICATION

– Rear View –

Part No.

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

1.5 k

Ω

0.15 µF

AC

voltmeter

(0.75 V)

To Exposed Metal

Parts on Set

Earth Ground

SAFETY CHECK-OUT

After correcting the original service problem, perform the follow-

ing 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 pas-

sive VOM that is suitable. Nearly all battery operated digital

multimeters that have a 2 V AC range are suitable. (See Fig. A)

TABLE OF CONTENTS

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

2. DISASSEMBLY ......................................................... 6

3. TEST MODE.............................................................. 9

4. DIAGRAMS

4-1. Block Diagram – MAIN Section (1/2) – ........................ 11

4-2. Block Diagram – MAIN Section (2/2) – ........................ 12

4-3. Block Diagram

– DISPLAY/POWER SUPPLY Section – ...................... 13

4-4. Note for Printed Wiring Boards and

Schematic Diagrams ...................................................... 14

4-5. Schematic Diagram – DIGITAL Board (1/3) – .............. 15

4-6. Schematic Diagram – DIGITAL Board (2/3) – .............. 16

4-7. Schematic Diagram – DIGITAL Board (3/3) – .............. 17

4-8. Printed Wiring Board

–DIGITAL Board (Component Side) ............................. 18

4-9. Printed Wiring Board

–DIGITAL Board (Conductor Side) ............................... 19

4-10. Printed Wiring Boards

–VIDEO/JOINT (1) (H) Boards (DE845) –................... 20

4-11. Schematic Diagram

–VIDEO/JOINT (1) (H) Boards (DE845) –................... 21

4-12. Printed Wiring Boards

– OSD/OSD JOINT (H) Boards (DE945) – ................... 22

4-13. Schematic Diagram

– OSD/OSD JOINT (H) Boards (DE945) – ................... 23

4-14. Printed Wiring Board – AU SW Board – ....................... 24

4-15. Schematic Diagram – AU SW Board – .......................... 25

4-16. Printed Wiring Board – S-VIDEO Board –.................... 26

4-17. Schematic Diagram – S-VIDEO Board –....................... 27

4-18. Printed Wiring Board –DISPLAY Board – .................... 28

4-19. Schematic Diagram – DISPLAY Board – ...................... 29

4-20. Printed Wiring Board – MAIN Board – ......................... 30

4-21. Schematic Diagram – MAIN Board (1/3) – ................... 31

4-22. Schematic Diagram – MAIN Board (2/3) – ................... 32

4-23. Schematic Diagram – MAIN Board (3/3) – ................... 33

4-24. Printed Wiring Boards – H.P/MUTING/POWER/

ROTARY/VIDEO 3(DE945)/VOL/

V. SWITCH (E) Boards – ............................................... 34

4-25. Schematic Diagram – H.P/MUTING/POWER/

ROTARY/VIDEO 3(DE945)/VOL/

V. SWITCH (E) Boards – ............................................... 35

4-26. Printed Wiring Boards – BIAS (C)/BIAS (L)

/BIAS (R)/BIAS (LS)/BIAS (RS)/5.1 IN Boards – ....... 36

4-27. Schematic Diagram – BIAS (C)/BIAS (L)

/BIAS (R)/BIAS (LS)/BIAS (RS)/5.1 IN Boards – ....... 37

4-28. Printed Wiring Boards –DC (1)/DC (2) Boards – .......... 38

4-29. Schematic Diagram –DC (1)/DC (2) Boards – .............. 39

4-30. Printed Wiring Boards –AC/SP Boards –....................... 40

4-31. Schematic Diagram – AC/SP Boards – .......................... 41

4-32. IC Pin Function Description ........................................... 46

5. EXPLODED VIEWS ................................................ 56

6. ELECTRICAL PARTS LIST ............................... 59

Model

DE945: US model

DE945: Canadian model

DE845: US model

DE845: Canadian model

Malaysia and Singapore models

Chinese model

Australian model

E and PX models

Part No.

4-226-871-0s

4-226-871-1s

4-226-871-3s

4-226-871-4s

4-226-871-5s

4-226-871-6s

4-226-871-7s

4-226-871-8s

4

SECTION 1

GENERAL

Location of controls

– Front view –

1 I/1 button

2 Function Buttons

3 INPUT MODE button

4 5.1CH INPUT button

8 DIMMER button

9 DISPLAY button

q; A. F. D button/indicator

2CH button/indicator

MODE button/indicator

qa CINEMA STUDIO EX. A – C buttons

qs MULTI CHANNEL DECORDING indicator

qd PRESET TUNING +/– buttons

SHIFT button

TUNING +/– buttons

FM/AM button

FM MODE button

qf 2ND AUDIO button (STR-DE945)

qg BASS BOOST button

qh EQUALIZER button

qj SET UP button

qk NAME button

ql ENTER button

w; cursor buttons (</>)

wa Jog dial

ws EQ button

wd SUR button

wf LEVEL button

5 MASTER VOLUME control

6 MUTING button

7 SPEAKERS button

PHONE jack

+–

PHONES

SPEAKERS

DIMMER DISPLAY

INPUT MODE

VIDEO 1 VIDEO 2 VIDEO 3 DVD/LD TV/SAT

CINEMA STUDIO EX.

MULTI CHANNEL DECODING

TAPE MD/DAT CD TUNER PHONO

5.1CH INPUT

A

BOFF

A+B

SOUND FIELD

A.F.D.

ABC

2CH MODE

LEVEL

SUR

EQ

SET UP

MASTER VOLUME

BASS BOOSTEQUALIZER

NAME

ENTER

010

VIDEO 3 INPUT

MUTING

BASS

BOOST

PRESET

TUNING

–+

MEMORY

FM/AM FM MODE

2ND AUDIO

SHIFT

EQUALIZER

VIDEO L AUDIO R

5.1CH

INPUT

12 34 5

67

4

+–

PHONES

SPEAKERS

DIMMER DISPLAY

INPUT MODE

VIDEO 1 VIDEO 2 VIDEO 3 DVD/LD TV/SAT

CINEMA STUDIO EX.

MULTI CHANNEL DECODING

TAPE MD/DAT CD TUNER PHONO

5.1CH INPUT

A

BOFF

A+B

SOUND FIELD

A.F.D.

ABC

2CH MODE

LEVEL

SUR

EQ

SET UP

MASTER VOLUME

BASS BOOSTEQUALIZER

NAME

ENTER

010

VIDEO 3 INPUT

MUTING

BASS

BOOST

PRESET

TUNING

– +

MEMORY

FM/AM FM MODE

2ND AUDIO

SHIFT

EQUALIZER

VIDEO L AUDIO R

89 0qaqs qdqf

qg

qjql

qh

qkw;

wa

wd

wf ws

(STR-DE945 only) (STR-DE845 only)

5

1 ANTENNA terminal

2 5.1CH INPUT jack

3 DIGITAL jack

OPTICAL jack

COAX jack

4 SPEAKERS terminal

FRONT (A/B) terminal

REAR terminal

CENTER terminal

5 SUB WOOFER jack

6 IMPEDANCE SELECTOR switch

7 AC POWER cord

8 AC OUTLET

9 CONTROL A1II jack

q; 2ND AUDIO OUT jack

– Rear View –

qa VIDEO 1 jack

qs VIDEO 2 jack

qd DVD/LD jack

qf TV/SAT jack

qg TAPE jack (STR-DE945)

qh MD/DAT jack (STR-DE945)

MD/TAPE jack (STR-DE845)

qj CD jack

qk PHONO jack

ql MONITOR jack

4 Ω 8 Ω

BA

RLRL

+

–

+

–

IMPEDANCE USE 4 – 16Ω 8 – 16Ω

SPEAKERS

IN

L

R

OUT

SIGNAL

GND

COAXIAL

AM

U

ANTENNA

TAPE

IMPEDANCE SELECTOR

FRONT

IN

PHONO

IN

CD

2ND AUDIO

OUT

REARFRONT CENTER

MONITOR

IN

OUT

MD/DAT

AUDIO IN

VIDEO IN

S-VIDEO

IN

VIDEO OUT

S-VIDEO

OUT

VIDEO IN

CTRL S

OUT

VIDEO OUT

CTRL S

OUT

VIDEO IN

S-VIDEO

IN

S-VIDEO

IN

VIDEO IN

S-VIDEO

OUT

CTRL S

STATUS IN

CTRL S

IN

AUDIO OUT

VIDEO 1

AUDIO IN

TV/SAT

AUDIO IN

DVD/LD

AUDIO INAUDIO OUT

VIDEO 2

FM

75Ω

+

–

+

–

RL

AC OUTLET

SUB WOOFER

AUDIO

OUT

CONTROL A1

DVD/LD

IN

DVD/LD

IN

TV/SAT

IN

MD/DAT

IN

MD/DAT

OUT

DIGITAL

OPTICAL COAX

L

R

REAR

FRONT

CENTER

SUB

WOOFER

5.1CH INPUT

4

8

5 6231

qfqd qs qa q; 9qgqhqjqkql

7

Setting

(E model)

a voltage selector

If your receiver has a voltage selector on the rear panel,

check that the voltage selector on the rear panel of the

receiver is set to the local power supply voltage. If not,

use a screwdriver to set the selector to the correct position

before connecting the AC power cord to a wall outlet.

220V

240V

120V

VOLTAGE SELECTOR

6

CASE

5.1 IN BOARD, AU SW BOARD, TUNER

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

SECTION 2

DISASSEMBLY

1 two screws

3 case

2

1 two screws

1 two screw

s

3 four screws

(BVTP 3X8

)

1 wire (flat type) (15 core)

(CN1)

4 tuner

5 5.1 IN board,

AU SW board

2 connector

(CNP10)

7

VIDEO/OSD/JOINT (1) (H)/OSD JOINT (H)/

S-VIDEO/DIGITAL BOARD

HEAT SINK

1 wire (flat type) (15 core

)

(CN51)

5 bracket (digital)

1 wire (flat type) (21 core)

(CN55)

4 DIGITAL board

8 VIDEO board (DE845)/OSD board (DE945),

JOINT (1) (H) board (DE845)/OSD JOINT (H) board (DE945)

S-VIDEO board

3 screw

(BVTP 3X8 )

2 three screws

(BVTP 3X8 )

7 seven screws

(BVTP 3X8 )

6 connector

(CNS213)

DE945

1 five connectors

(CNP511, 611, 561, 711, 761)

3 two screws

(BVTP 3X6)

4 screw

(BVTP 3X8 )

4 screw

(BVTP 3X8 )

2 ten screws

5 heat sink

8

VOL BOARD, MAIN BOARD

5 four screws

(BVTP 3X8 )

2 knob

3 washer

7 three screws

(BVTP 3X8 )

6 connector

(CNS305)

8 MAIN board

4 VOL board

1 wire (flat type) (23 core

)

(CNS111)

DE945

9

SECTION 3

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:

1. While depressing, the [A.F.D] and the [DIMMER] buttons si-

multaneously, press the power `/1 button to turn on the main

power.

2. All segments turn on at the same time, then each segment turns

on press the [A.F.D] button.

Factory Set Mode

All preset contents are reset to the default setting.

Procedure:

1. While depressing the [SET UP], and the [DIMMER] buttons

simultaneously, press the power `/1 button to turn on the

main power. The message Factry 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:

1. While depressing the [SET UP] button simultaneously, press

the power `/1 button to turn on the main power. The ma-

chine enters the DEMO mode.

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

the power `/1 button is pressed often the demonstration has

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

if the power

`/1 button is pressed again.

ALL CLEAR mode; Press the [A.F.D], [SOUND FIELD MODE

+ ], and `/1 buttons.

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:

1. While depressing the [SOUND FIELD MODE + ] button, press

the power `/1 button to turn on the main power. The mes-

sage S.F Initialize appears and initialization is performed.

AM Channel Step 9 kHz/10 kHz

Selection Mode (US, Canadian, and E Models)

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

channel step.

Procedure:

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

2. While depressing the [TUNING+] button or the [PRESET

TUNING +] button, press the power `/1 button to turn on the

main power.

3. Either the message AM 9kHz Step or AM 10kHz Step appears.

Select the desired step.

DSP Test Mode

It tests whether the DSP works correctly or not. When the DSP

test is activated, the test data is output from the DSP (IC1401:

CXD2712R) of the DIGITAL board and is written in the RAM

(IC1402: IDT71V016S). When the test data is read from the RAM

by the DSP, the data output must be equivalent to the original data.

If they disagree, an error is triggered. Errors can be caused by the

broken data line or defective soldering.

Procedure:

1. While pressing the [SOUND FIELD MODE + ] and [DIMMER]

buttons, press the `/1 button to enter the DSP test mode.

2. The message DSP TEST MODE appears. When an error oc-

curs, the message DSP2 ERROR is displayed. When there is

no error, the message DSP2 NO ERROR appears and the 1

kHz signal is output to all channels.

3. Use the [MUTING] button, when selecting the SINE WAVE,

THROUGH, or IMPLUSE mode.

Version Mode

When this mode is used, the microprocessor version number is

displayed.

Procedure:

1. Press the `/1 button while pressing the [MUTING], and [DIM-

MER] buttons to turn on the power. The microprocessor ver-

sion number appears as follows.

( )

10

MEMO

1111

STR-DE845/DE945

L

DATA

FM

AM

FM

75Ω

AM

DO

TUNED

MUTING

STEREO

DATA

CLOCK

CE

L OUT

R OUT

TM301

TUNER UNIT

DO

TUNED

MUTING

STEREO

S DATA

S CLK

S LAT

R CH

PHONO IN

(DE945)(DE845)

(DE945)

(DE845)

LCD IN

J301

LIN

LRECOUT

J302

J1001

DAT/MDMD/TAPE

M OUT

J201

MONITOR

J202

J203

VIDEO 1

V1 IN

V1 OUT

V2 IN

V2 OUT

TV

LD

VEE

VCC

SW1

SW2

SW3

SW4

VIDEO SELECT

IC201

+5V

–5V

D202

D201

D204

D205

CE

CLK

DI

AUDIO SELECT

IC301

MUTE

Q1502

S LAT

S CLK

S DATA

S LAT

S CLK

S DATA

EQ AMP

IC302

MUTE

Q1505

IC1508

MUTE

Q1506

VIDEO

(SW1)

SYSTEM

CONTROLLER

IC1201 (1/2)

VIDEO

(SW2)

VIDEO

(SW3)

VIDEO

(SW4)

AUTO STOP

STEREO

TUNER MUTE

S DATA

S CLK

S LAT

DO

TUNED

STEREO

TMUTE

DATA

CLOCK

LATCH

J299-1

LAUDIOVIDEO 3 INPUT

SELECTOR

IC303

L

TAPE

IN

L

Y

V1 0

LD

M 0

Y SWITCH

IC252

VIDEO 1

S-VIDEO OUT

MONITOR

S-VIDEO OUT

Y

C

C SWITCH

IC251

C

Y

J251

J253-2

J252-1

05

J303

V1 0

V1 I

M 0

V1 I

C

Y

J253-1

C

Y

LD

TV

TM301

(ANTENNA)

IR LINK

DET

IC001

DVD/LD IN

IR LINK

DET

IC002

TV/SAT IN

IR LINK

DET

IC003

DAT/MD IN

IR LINK

DET

IC004

MD/DAT OUT

DVD/LD INCOAX

IC007

SW1

SW2

SW3

SW4

SW5

SW1

SW2

SW3

SW4

VIDEO OUT

SELECT

SWITCH

IC1005

B

A

B

A

DI

DIG IN A

DIG IN B

A

B

CL

CE

DO

DIGITAL AUDIO

I/F RECEIVER

IC1101

D IN

DI

CLK

CE

DATA

CK OUT

BCK

12.288M

ERROR

DO

X3501

12.288MHz

IC1404

XI

SDIA0

SDIA1

SDWCK0

DOLBY

DIGITAL AUDIO DECODER

IC1301

AU

DATA0

AU

DATA1

AU

DATA2

SCK

SCCLK

SI

CS

IC

SI

CS

IC

SO

D1202

ANALOG/DIG

ERROR

SRAM

IC1402

SIA

SIB

SIC

XWE

XOE

XHDWR

HA0

AUDIO DSP

IC1401

XHDWR

XHDCS

XRST

XHDCS

HRDY

XRST

HRDY

SOD

S MUTE

IC1202

Q1201

Q1202

CDTI

CCLK

CS

PD

SOA

LRCK1

LRCK0

BCK1

SOB

SOC

L OUT1

LIN-

AUDIO CODEC

IC1503

S MUTE

CDTI

CCLK

CS

PD

SDTO

MCLK1

BCLK

LRCK

SDTI 1

SDTI 2

SDTI 3

LIN+

IC1504 IC1504

L OUT3

IC1508

IC1509

MUTE

Q1503

IC1510

R OUT3

L OUT2

IC1507

IC1505

IC1506

MUTE

DRIVE

Q1507

Q1204

Q1203

U DATA

DISP DATA

DISP CLK

DISP MR

SREQ

SOTO

SINO

MD2

MD0

RESET

U CLOCK

U MREQ

U SREQ

SOT0

SIN1

MD2

MD0

U REST

RY POWER

AC MUTE

PROTECT

RY HP

RY FRONT A

RY FRONT B

RY CENTER

RY WOOFER

RY REAR

AC MUTE

PROTECTOR

HP RY

SP/A RY

SP/B RY

RY CENTER

RY WOOFER

REAR SP RY

XOXI

X1201

16MHz

STOP

IC11404

TUNER

CD

MD

TAPE

COM

S LAT

S CLK

S DATA

SELECTOR

IC330

SW5

S DATA

S CLK

S LAT

EV DATA

EV CLK

EV STB

IC309

AUTO

LRCK

SDBCK0

IC1403

BCK0

IC1403

DFS

CLKI

CLKO

X1401

10MHz

RELAY

DRIVE

Q301

SELECTOR

IC1502

2CH L

CDL

S.1-L

S.1-LS

S.1-C

L

C

W

LS

L OUT

C OUT

W OUT

LS OUT

S LAT

S CLK

S DATA

RY301

J306

2ND

AUDIO

OUT

L

R

R CH

L

C

W

SL

DATA

CLK

LAT

XMODE

XSTATE

XMODE

XSTATE

AUTO

S MUTE

RESET

D1201

IC304

96kHZ

D SIG

1321315144

10

12

(DE945)

RECOUT

LINPUT

J305

LOUTPUT

TV/SAT

DVD/LD

VIDEO2

VIDEO OUT

VIDEO IN

VIDEO 1

VIDEO 2

VIDEO OUT

VIDEO IN

TV/SAT

S-VIDEO IN

TV/SAT

S-VIDEO IN

DVD/LD

(DE945)

CONTROL

CE

CLK

DI

LINPUT

LOUTPUT

J304

LINPUT

VIDEO1

CONTROL

D1101

6

2

1

7

5

3

2

4

67

3

5

53

ı

69

76

ı

94

ED16 – 31

EA0 – 15

25

ı

31

39

ı

45

D0 – 7

24 – 17

HD0 – HD7

HA0

10

11

8

9

5

3

7

1

SUB WOOFER

5.1CH INPUT

CENTER

REAR L

FRONT L

J307

B

C

D

• SIGNAL PATH

: FM

: PHONO

: DVD

: CD

(DE945)

J252-2

26

27

25

26

27

25

23

3

4

2

8

7

6

11 12

14 16

3

36

38

37

15

10

15 14 16

5

7

10

11

12

2

14

4

6

3

4

9

72

75

76

77

1

13

15

16

8

14

10

4

6

2

5

3

15

14

10

4

6

2

1

15

2

14

10

4

6

1

13

5

3

13

9

11

3

5

58 59 60 84 112 110 111 109 11856 57 55 47 48 46 116 113 114 106 85 6

32

48 17

35

34

22 8

82

83

24

23

22

113

114

115

116

117

74

70

15

9 14 26

2

3

4

99

5

13

100

2

27

19

18

20

23

26

3

21

17

25

4

22

27

2

24

15 14 16

23

24

25

5

4

39

9

29

30

3

4

118

119

83

84

85

15

14

13

16

1 2 4 5

69 68 66 62

3 25 13 16 26 27 15 31 30 29 28 32 35

82

66

51

90

105

69

10

9

87

89

9293

104

99

100

101

103

102

50

52

49

3 43 42 41 17 11

108 107

27

26

25

27

26

25 17

14 1615

14

12

13

11

(Page 13)

SECTION 4

DIAGRAMS

4-1. BLOCK DIAGRAM – MAIN Section (1/2) –

1212

STR-DE845/DE945

VIDEO SELECT

IC2005

Y SWITCH

IC252

C SWITCH

IC251

VIDEO BUFFER

IC2002

X2002

14MHz

CLOCK

IC2001

05

J299-2

(DE945)

J2003

J2002

VCC

VEE

+5V

–5V

SW1

16

8

14

V1 OUT

15

3

TV

5

LD

13

V1 IN

1

M OUT

6

SW4

4

SW3

10

SW2

14

SW1

Y

C

V1 OUT

15

3

TV

5

LD

13

V1 IN

1

M OUT

6

SW4

4

SW3

10

SW2

14

SW1

C IN

10 9 811

4

Y IN

2

V IN

3

6

C OUT

8

Y OUT

7

V OUT

VBLK

6

26

C OUT

27

Y OUT

25

V OUT

8

10

EXS

HSYNC

VSYNC

TEST

SW2

SW3

SW4

D2003 D2004

VIDEO (SW1)

SYSTEM CONTROLLER

IC1201 (2/2)

VIDEO (SW2)

VIDEO (SW3)

VIDEO (SW4)

10

4 75

76

77

72

6

SW5

M OUT

V3

TV

LD

V2 OUT

V2 IN

V1 OUT

V1 IN3

2

1

7

3

5

11

9

15

13

VIDEO IN

VIDEO OUT

VIDEO IN

VIDEO OUT

VIDEO IN

VIDEO

VIDEO 3

INPUT

TV/SAT

S-VIDEO IN

TV/SAT

DVD/LD

J2001

VIDEO OUT

MONITOR

VIDEO 1

VIDEO 2

Y

C

Y

J253-1

S-VIDEO IN

DVD/LD

J253-2

S-VIDEO IN

VIDEO 1

J252-1

C

Y

C

S-VIDEO OUT

VIDEO 1

J252-2

SCLK

22

SIN

23

CS

24

OSD VBLK

56

OSD CLK

26

OSD DOUT

28

OSD VSYNC

55

OSD LAT

MODE

CONTROL

IC102

100

YIN

1

VIN

3

CIN

2

EXHSYN

CNP253

(FOR CHECK)

12

IN

VSYNC

D2002

D2005

IC2008

SYNC

IC2006

SYNC

Q2001, 2002

HSYNC

2

1

4

Y

C

S-VIDEO OUT

MONITOR

J251

IC2004

OSD DRIVER

11 21

IN

VSYNC

HSYNC

2

1

4

4-2. BLOCK DIAGRAM – MAIN Section (2/2) –

1313

STR-DE845/DE945

B

C

D

3

9

8

10

3

2

13

14

15

8

1

13

14

15

6

1

3

5

2

11

9

12

2

15

2

14

9

8

10

3

9

8

10

VEE

VCC

IN

MUT

+VE

NF

–VE

VCC

POWER AMP (L)

IC501

+B

–B

13

14

15

8

1

49

95 96 93 94 18

9

13

6

4

10

5

8

2

4

51 20 19 61 62 60 59 88 87 89 90 82 83 98 99

5 14

15 16

33

2

12

11

1358 75 76 1 2 3 4 5 8

11

9

12

VEE

VCC

IN

MUT

+VE

NF

–VE

VCC

POWER AMP (SL)

IC701

+B

–B

BOOSTER

Q506

BOOSTER

Q507

CUR DET

Q508

AF DETECTOR

Q509,510

Q511

VEE

IN

+VE

NF

–VE

VCC

POWER AMP (C/W)

IC601

+B

–B

MUT

BOOSTER

Q606

BOOSTER

Q607

CUR DET

Q608

AF DETECTOR

Q609,610

Q611

BOOSTER

Q706

BOOSTER

Q707

CUR DET

Q708, Q798

RY602

RY501

RY502

RY601

RY681

RY901

JJ103

C

S (L)

S (R)

R CH

CENTER

REAR

SUB WOOFER

J701

TM701

FRONT

TM501

R CH

RESET

IC1206

D801

PROTECTOR

Q547-549

F2

F1

F801

F802

D802-805

+B

–B

84

S801

F901

D901-904

CNP901

AC IN

L

R

VCC

F803

F804

+24V

CNJ901

T902

MODE CONTROL

IC102

STOP

AC MUTE

PROTECTOR

RESET

POWER KEY

F2

F1

05

JW925

STOP

RESET

TV/SAT

CTRL S

STATUS IN

MONITOR

CTRL S

IN

VIDEO 1

CTRL S

OUT

DVD/LD

CTRL S

OUT

J204: DE845

J2004: DE945

J256

J255

J258

J257

CONTROL S

I/O

IC253

11

10

+5V

REG

IC404

–15V

+15V

+5V

+32V

Q801

F805

F904

(E, PX)

T901

F903

(US, Canadian, E, PX)

LED CLR

HP RY

SP/A RY

SP/B RY

RY CENTER

RY WOOFER

REAR SY RY

ABUS A1 IN

ABUS OUT

FL101

FLOURESCENT

INDICATOR TUBE

LAT

CLK

CLR

DIN

FL CLK

FL LAT

FL CLEAR

FL DATA

SP B

SP A

AD KEY6

AD KEY1

AD KEY2

AD KEY3

AD KEY4

AD KEY5

MD0

LED CE

LED CLK

LED DATA

EQ

DCS

D119, 122, 123,

125, 151, 152

D.D

JOG

MUTE

B.B

MBUS DVD

SIRCS IN

MBUS VIDEO 1

MBUS STA OUT

MBUS TV

UP

DOWN

MOTOR

DRIVE

IC105

MD2

SINO

SOTO

UDATA

UCLOCK

UMREQ

URESET

UMREQ

UCLOCK

UDATA

SOTO

SIN1

MD2

MD0

XO

XI

CARR OUT

IC12

SIRCS

CTL

I/O

IC11

QQ11

+B

QQ13,14

SIRCS IN

CA1 I

RESET

CA1 O

IC103

FL DRIVE

RY POWER

IC408

VOLUME

RV401

L

C

W

SL

IN

DATA

CLK

LAT

OUT

DATA

CLK

LAT

IN

DATA

CLK

LAT

OUT

DATA

CLK

LAT

IN

OUT

IC409

(1/2)

IC409

(2/2)

IN

DATA

CLK

LAT

OUT

DATA

CLK

LAT

IC410

VOL CONT

IC414

VOL CONT

IC415

VOL CONT

IC416

DATA

CLK

LAT

USREQ

AF DETECTOR

Q709,710

A

B

R

L

JW927

JW928

EXCEPT US,

Canadian, E, PX

VS901

240V

220V

120V

VOLTAGE

SELECTOR

EXCEPT E

D806-809

D1208

D1211

POWER RY

RESET

LAT

D1209

X101

16MHz

X11

7.82MHz

(DE945)

BUFFER

Q201, 202

(US, Canadian)

JOG DOWN

JOG UP

RV101

LED DRIVER

IC106

AD KEY7

Q604, Q605

BIAS

Q505

BIAS

Q704, Q705

BIAS

DIGITAL +5V

CONT µCOM ETC

DISP µCOM+5.6V

TUNER +5V

IR LINK +5V

31

57

RY701

RELAY

DRIVE

Q601

RELAY

DRIVE

Q546

RELAY

DRIVE

Q596

RELAY

DRIVE

Q645

RELAY

DRIVE

Q681

RELAY

DRIVE

Q745

PHONES

SPEAKERS

MUTE DRIVE

Q501, 503

MM

38 39 40 41 43 44 7 64 65 66 21 24 25 22

30 31 32 28

67

47

77

63

IN1

1

2

1

IN3

7

2

OUT1

1 – 7 9 – 15 20 – 29

D104 – 106,

157, 158,

160 – 172

LED

DRIVE

SIRCS DET

IMPEDANCE

SELECTOR

31

–5V

REG

IC405

–5V

23

+15V

REG

IC401

13

–15V

REG

IC402

23

+5V

REG

IC1208

13

+15V

REG

IC1207

13

+3.3V

REG

IC1203

13

+5V

REG

IC1204

13

+6.2V

REG

IC1205

13

3

6

8 5

+32V

REG

SWITCH

Q613

D812 D811

RESET

Q108

+6.2

REG

Q1205

RELAY

DRIVE

Q901

CONTROL A1 II

FUNCTION

KEY

S111 – 118

FUNCTION

KEY

S121 – 125

FUNCTION

KEY

S131 – 137

FUNCTION

KEY

S141 – 148

FUNCTION

KEY

S151 – 157

FUNCTION

KEY

S161 – 165

SPEAKERS

S101

I/O

BUFFER

Q109

D101

MUTING

S150

(POWER)

I/1

D180

1 3

IC101

REMOTE

CONTROL

RECEIVER

B+ (5V)

• SIGNAL PATH

: FM

: CD

(Page 11)

4-3. BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section –

1414

SP board DC (2) board

AC board

DIGITAL board

5.1 IN board

AU SW board

MUTING board

ROTARY board

DISPLAY board

POWER board

DC (1) board

VIDEO 3 board (DE945)

• Circuit Boards Location

4-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Schematic Diagram:

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

50 WV or less are not indicated except for electrolytics

and tantalums.

•

f

: internal component.

• 2 : nonflammable resistor.

• C : panel designation.

• U : B+ Line.

• V : B– Line.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : FM

∗

: Impossible to measure

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

Voltage variations may be noted due to normal produc-

tion tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-

tion tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : FM

J : CD

I : PHONO

• Abbreviation

AUS : Australian model

CH : Chinese model

CND : Canadian model

MY : Malaysia model

SP : Singapore model

Note:

The components identi-

fied by mark 0 or dotted

line with mark 0 are criti-

cal for safety.

Replace only with part

number specified.

Note:

Les composants identifiés par

une marque 0 sont critiques

pour la sécurité.

Ne les remplacer que par une

pièce portant le numéro

spécifié.

C

B

These are omitted.

E

Q

B

These are omitted.

CE

Q

B

These are omitted.

CE

Q

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

•

a

: Through hole.

• b : Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

Caution:

Pattern face side: Parts on the pattern face side seen from

(Conductor Side) the pattern face are indicated.

Parts face side: Parts on the parts face side seen from

(Component Side) the parts face are indicated.

BIAS (C) board

BIAS (R) board

BIAS (RS) board

BIAS (LS) board

BIAS (L) board

S-VIDEO board

VIDEO board (DE845)/

OSD board (DE945)

JOINT (1) (H) board (DE845)/

OSD JOINT (H) board (DE945)

MAIN board

VOL board

H.P board

V. SWITCH board (E/PX)

• Indication of transistor

1515

STR-DE845/DE945

PIN FUNCTION

4-5. SCHEMATIC DIAGRAM – DIGITAL Board (1/3) –• See page 42 for Waveform. • See page 42 for IC Block Diagram.

(Page 27)

(Page 29)

(Page 39)

(Page 32)

(Page 16)

(Page 17)

1616

STR-DE845/DE945

PIN FUNCTION

4-6. SCHEMATIC DIAGRAM – DIGITAL Board (2/3) –• See page 42 for Waveform. • See page 42 for IC Block Diagrams.

(Page 17)

(Page 15)

1717

STR-DE845/DE945

PIN FUNCTION

4-7. SCHEMATIC DIAGRAM – DIGITAL Board (3/3) –• See page 42 for Waveform. • See page 42 for IC Block Diagrams.

The components identified by mark 0 or dotted

line with mark 0 are critical for safety.

Replace only with part number specified.

Les composants identifiés par une marque 0 sont

critiques pour la sécurité. Ne les remplacer que

par une pièce portant le numéro spécifié.

(Page

16)

(Page 15)

(Page 25)

1818

STR-DE845/DE945

4-8. PRINTED WIRING BOARD – DIGITAL Board (Component Side) –• See page 14 for Circuit Boards Location.

IC1201 D-4

IC1202 F-5

IC1301 H-5

IC1401 G-8

IC1402 I-8

IC1403 J-7

IC1404 I-4

IC1503 I-11

IC1504 H-12

IC1554 G-11

Q1201 E-6

Q1202 E-6

Q1203 E-2

Q1204 E-2

Ref. No. Location

D1001 I-2

D1101 F-3

D1201 B-3

D1202 D-2

D1203 D-5

D1204 G-12

D1205 G-12

D1208 F-15

D1209 F-2

D1210 D-4

D1211 G-16

D1212 B-1

IC1005 I-2

IC1007 I-1

IC1101 H-3

• Semiconductor Location

1919

STR-DE845/DE945

4-9. PRINTED WIRING BOARD – DIGITAL Board (Conductor Side) –• See page 14 for Circuit Boards Location.

IC1204 J-17

IC1205 F-14

IC1206 H-16

IC1207 H-14

IC1208 G-13

IC1501 J-15

IC1511 B-6

Q1205 G-17

Ref. No. Location

D1206 F-14

D1207 F-13

D1502 I-11

D1503 I-11

IC1001 F-1

IC1002 E-1

IC1003 D-1

IC1004 C-1

IC1203 J-14

• Semiconductor Location

(Page 24)

(Page 38)

(Page 28)

(Page 26)

(Page 28)

(Page 30)

2020

STR-DE845/DE945

4-10. PRINTED WIRING BOARDS – VIDEO/JOINT (1) (H) Boards (DE845) –• See page 14 for Circuit Boards Location.

(Page 26)

TO

VIDEO

BOARD

TO

JOINT (1) (H)

BOARD

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Sony STR-DE845 User manual

Sony STR-DE845 User manual

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