Sony STRDB-798 Service manual

STR-DB798

SERVICE MANUAL

Ver. 1.0 2005.07

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

Laboratories. “Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories.

**“DTS” and “DTS Digital Surround” are registered

trademarks of Digital Theater Systems, Inc.

Amplifier section

Power Output Models of area code CEL, CEK, TW Rated Power Output at Stereo Mode (8 ohms 20 Hz – 20 kHz, THD 0.09%)

(8 ohms 1 kHz, THD 0.7%)

(8 ohms 1 kHz, THD 10%)

Reference Power Output (8 ohms 20 Hz – 20 kHz, THD 0.09%)

2)

FRONT

: 100 W/ch

2)

: 100 W

CENTER

2)

: 100 W/ch

SURR SURR BACK (8 ohms 1 kHz, THD 0.7%) FRONT CENTER SURR SURR BACK (8 ohms 1 kHz, THD 10%) FRONT CENTER SURR SURR BACK

1) Measured under the following conditions:

Area code Power requirements

AEP, UK 230 V AC, 50 Hz Taiwan 110 V AC, 60 Hz

2) Depending on the sound field settings and the

Frequency response PHONO RIAA equalization curve

MULTI CH IN, SA-CD/ CD, MD/TAPE, DVD, TV/SAT, VIDEO 1, 2, 3

2)

: 100 W/ch

2)

: 110 W/ch

2)

: 110 W

2)

: 110 W/ch

2)

: 110 W/ch

2)

: 135 W/ch

2)

: 135 W

2)

: 135 W/ch

2)

: 135 W/ch

source, there may be no sound output.

SPECIFICATIONS

100 W + 100 W

110 W + 110 W

135 W + 135 W

1)

±0.5 dB 10 Hz – 100 kHz

+0.5/–2 dB (when ANALOG DIRECT is selected)

1)

AEP Model

UK Model

Taiwan Model

Inputs (Analog) PHONO Sensitivity: 2.5 mV

MULTI CH IN, SA-CD/ CD, MD/TAPE, DVD, TV/SAT, VIDEO 1, 2, 3

3) INPUT SHORT.

4) Weighted network, input level.

Inputs (Digital) DVD, SA-CD/CD

(Coaxial)

DVD, TV/SAT, MD/TAPE, VIDEO 3 (Optical)

Outputs (Analog) MD/TAPE (OUT),

VIDEO 1, 2 (AUDIO OUT)

SUB WOOFER Voltage: 2 V

Outputs (Digital) MD/TAPE (Optical) Sensitivity: –

Equalizer Gain levels ±10 dB, 1 dB step

Impedance: 50 k ohms

3)

: 86 dB

S/N

4)

3)

: 96 dB

)

4)

)

(A, 2.5 mV Sensitivity: 150 mV

Impedance: 50 k ohms S/N (A, 150 mV

Sensitivity: – Impedance: 75 ohms S/N: 100 dB (A, 20 kHz LPF)

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

Voltage: 150 mV Impedance: 2.2 k ohms

Impedance: 1 k ohm

– Continued on next page –

9-879-775-01

FM STEREO FM/AM RECEIVER

Sony Corporation

Audio Group Published by Sony Engineering Corporation

STR-DB798

FM tuner section

Tuning range 87.5 - 108.0 MHz Antenna FM wire antenna Antenna terminals 75 ohms, unbalanced Intermediate frequency 10.7 MHz Sensitivity Mono: 18.3 dBf, 2.2 µV/75 ohms Stereo: 38.3 dBf, 22.5 µV/75 ohms Useable 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,

Selectivity 60 dB at 400 kHz

AM tuner section

Tuning range Models of area code AEP, UK, Taiwan With 9-kHz tuning scale: 531 – 1,602 kHz Antenna Loop antenna Intermediate frequency 450 kHz Usable sensitivity 50 dB/m (at 1,000 kHz or

S/N 54 dB (at 50 mV/m) Harmonic distortion 0.5% (50 mV/m, 400 Hz) Selectivity At 9 kHz: 35 dB

+0.5/–2 dB

999 kHz)

Video section

Inputs/Outputs Video: 1 Vp-p, 75 ohms S-video: Y: 1 Vp-p, 75 ohms

COMPONENT VIDEO: Y: 1 Vp-p, 75 ohms

General

Power requirements

Area code Power requirements

AEP, UK Taiwan

Power consumption

Area code Power consumption

AEP, UK Taiwan

Power consumption (during standby mode)

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

Mass (Approx.) 13.5 kg

Supplied accessories

FM wire antenna (1) AM loop antenna (1) Remote commander RM-AAP002 (1) R6 (size-AA) batteries (2) AC power cord (1)

Design and specifications are subject to change without notice.

C: 0.286 Vp-p, 75 ohms

B/CB

/B-Y: 0.7 Vp-p,

P 75 ohms

R/CR

/R-Y: 0.7 Vp-p,

P 75 ohms 80 MHz HD Pass Through

230 V AC, 50/60 Hz 110 V AC, 50/60 Hz

290 W 520 W

0.3 W

397 160 .5 430 mm including projecting parts and controls

Notes on chip component replacement

• Never reuse a disconnected chip component.

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

damaged by heat.

SAFETY-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 P AR TS WHOSE PART NUMBERS APPEAR AS SHO WN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.

2

SERVICING NOTES

• MODEL IDENTIFICATION

– Back Panel –

PART No.

Model PART No.

AEP model 2-594-539-0[] Taiwan model 2-594-539-1[] UK model 2-594-539-4[]

UNLEADED SOLDER

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

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 °C. Caution: The printed pattern (copper foil) may peel away if

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

• Strong viscosity Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

4

SERVICE POSITION

)

d

When checking without back panel, it is necessary to connect the clip for GND to a chassis.

STR-DB798

COMP-V board (JW300)

DIGITAL board (EB1101

clip

-MAIN BOARD SERVICE POSITION-

DIGITAL board

COMP-V board

clip

AU-IN board (JW101)

rear panel

MAIN boar

5

STR-DB798

Receiver

SECTION 2

GENERAL

This section is extracted from instruction manual.

ALPHABETICAL ORDER

A - L

A.F.D. qj Cover ws DIRECT qs DISPLAY 9 Display 7 INPUT MODE q; INPUT SELECTOR qf IR (receptor) 1

1

263

M - Z

MAIN MENU 4 MASTER VOLUME –/+ qa MEMORY/ENTER 5 MENU 3 MOVIE qh MULTI CHANNEL DECODING

(indicator) 8 MULTI CH IN qd MUSIC qg PHONES (jack) wg PRESET TUNING –/+ wa

8745

w;

wawfwgwh

ws

PUSH wf SPEAKERS (OFF/A/B/A+B) wh SURR BACK DECODING ql TUNING –/+ w; VIDEO 3 INPUT (jacks) wd

NUMBERS AND SYMBOLS

2CH qk –/+ 6

?/1 (power) 2

9

0

qa

qk qj qh qg qf qd qsql

wd

To remove the cover

PU

S

H

Press PUSH to remove the cover. When you remove the cover, keep the cover out of reach of the children.

6

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

3-1. DISASSEMBLY FLOW

SET

3-2. CASE

(Page 7)

3-3. COMP-V BOARD

(Page 8)

3-4. BACK PANEL BLOCK

(Page 8)

3-5. DIGITAL BOARD, A/V SYNC BOARD

(Page 9)

STR-DB798

SECTION 3

DISASSEMBLY

3-6. STAY-5/AU-IN/VIDEO-AU/VIDEO/

S-VIDEO/SPK-A/SPK-B BOARD (Page 9)

3-7. MAIN BOARD BLOCK

(Page 10)

3-8. MAIN BOARD

(Page 10)

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

3-2. CASE

4

case

1

four flat head screws

3

two screws (BVTP3

×

8)

2

two flat head screws

7

STR-DB798

s

)

3-3. COMP-V BOARD

5

connector (CN3052)

6

COMP-V board

4

3

two connectors (CN919, 3801)

2

feeder fixed screw

1

two screws (BVTP3 × 8)

3-4. BACK PANEL BLOCK

3

eight screws (BVTP3 × 8)

6

two screws (BVTP4

5

×

8)

five screws (BVTP3

×

10)

3

seven screws (BVTP3 × 8)

4

five screws (BV3

connector (CN168)

×

8 CU)

3

eight screw (BVTP3 × 8

2

two connectors (CN901, 902) (AEP, Taiwan)

1

wire (flat type) (15 core) (CN1103)

4

screw (BV3 × 8 CU)

7

back panel block

8

3-5. DIGITAL BOARD, A/V SYNC BOARD

d

qj

two connectors (CN412, 413)

3

screw (PSW3

×

8)

1

connector (CN178)

qd

connector (CN408)

q;

connector (CN301)

7

connector (CN202)

8

connector (CN201)

qs

connector (CN853)

qf

S-VIDEO board

qa

VIDEO board

9

VIDEO-AU board

6

AU-IN board

qk

SPK-B board

qh

SPK-A board

2

STAY-5 board

4

lead wire

qg

two connectors (CN448, 449)

5

two connectors (CN102, 103)

4

three connectors (CN107, 1110, 1112)

3

wire (flat type) (31 core) (CN1105)

8

A/V SYNC holder

2

5

7

screw (BVTP3

9

A/V SYNC boar

DIGITAL board

6

connector (CNS551)

×

8)

STR-DB798

3-6. STAY-5/AU-IN/VIDEO-AU/VIDEO/S-VIDEO/SPK-A/SPK-B BOARD

1

two connectors (CN402, 403)

9

STR-DB798

k

)

3-7. MAIN BOARD BLOCK

3

four screws (BVTP3 × 8)

1

three connectors (CN907, 909, 910)

1

connector (CN418)

2

four screws (BVTP3 × 8)

4

MAIN board bloc

3-8. MAIN BOARD

4

heat sink assy

2

three connectors (CN18, 28, 38)

1

Remove fourty two solders.

3

two screws (BVTP3

6

A CLASS board

×

8)

7

MAIN board

5

five connectors (CN401, 421, 501, 601, 651

10

SECTION 4

TEST MODE

STR-DB798

TUNER FACTORY PRESET MODE

All preset contents are reset to the default setting.

Procedure:

1. While pressing the [MUSIC] and [PRESET TUNING --] buttons, press the I/1 button to turn on the main power.

2. The message “FACTORY” appears and the present contents are reset to the default values.

TUNER AUTOBETICAL TUNING MODE (AEP and UK models)

Procedure:

1. While pressing the [MEMORY/ENTER] button, press the

I/1 button to turn on the main power.

2. The message “A UTO-BETICAL SELECT” appears and scans and stores all the FM and FM RDS stations in the broadcast area.

3. When done, the message “FINISH” appears.

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 pressing the [2CH] button, press the I/1 button to turn on the main power.

2. The message “SF. CLR.” appears and initialization is performed.

VERSION CHECK MODE

The version of the micro computer displayed.

Procedure:

1. While pressing the [PRESET TUNING --] and [2CH] buttons, press the I/1 button to turn the main power.

2. The version of the micro computer and model destination are displayed.

DECODE AUTO ALL MODE

Procedure:

1. While pressing the [PRESET TUNING --] and [MOVIE] buttons, press the I/1 button to turn the main power.

2. The message “DEC TEST” appears.

PROTECTOR AUTO OFF

When this mode is used, a protector on state is maintainable.

Procedure:

1. While pressing the [PRESET TUNING +] and [MOVIE] buttons, press the I/1 button to turn on the main power.

2. The message “PROT EVER” appears.

FLUORESCENT INDICATOR TUBE PATTERN CHECK 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 pressing the [PRESET TUNING --] and [A.F.D.] buttons, press the

2. All segments and [MULTI CHANNEL DECODING] indicator LED turn on.

I/1 button to turn on the main power.

SHIPMENT 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 pressing the [PRESET TUNING --] and [SURR BACK DECODING] buttons, press the I/1 button to turn ton the main

power.

2. The message “CLEARING” appears and memories are reset to the default values and the main power turn of f automatically .

SWAP ALL MODE

Procedure:

1. While pressing the [PRESET TUNING +] and [A.F.D.] buttons, press the I/1 button to turn on the main power.

2. The message “SWAP” appears.

COMMAND MODE CHANGE MODE

The command mode of the remote-commander which this set receives can be changed.

Procedure:

1. While pressing the [INPUT MODE] buttons, press the I/1 button to turn the main power.

2. Either the message “C.MODE.AV1” or “C.MODE.AV2” appears. Select the desired mode.

11

STR-DB798

BIAS ADJUSTMENT

Condition:

input signal: no signal (no load) volume: minimum

SECTION 5

ELECTRICAL ADJUSTMENTS

Connection

CN432 (CN482, 532, 582, 632, 682, 732) pin CN432 (CN482, 532, 582, 632, 682, 732) pin

digital voltmeter

1 2

+ –

Procedure:

1. Connect a digital voltmeter to the CN432 (CN482, CN532, CN582, CN632, CN682, CN732) on the MAIN board.

2. Press the I/1 button to turn on the main power.

3. Adjust the RV431 (RV481, RV531, RV581, RV631, RV681, RV731) on the MAIN board so that the digital voltmeter reading is 15±2 mV.

Note: When the adjusting voltage is higher than 15±2 mV, adjust the

voltage to the minimum voltage.

Adjustment and Connection Loacation:

– MAIN Board (Component Side) –

RV481

RV431

CN432 21

RV731

CN482

21

CN732

RV631 RV681

21

CN632

21

CN682

21

CN532

21

RV531

RV581

CN582

12

SECTION 6

DIAGRAMS

6-1. BLOCK DIAGRAM – TUNER/VIDEO Section –

TUNER-L

B

ANTENNA

(Page 15)

COAXIAL

FM 75

A

(Page 17)

AM

DATA, CLK

DATA CLK

TUNER

ST-DO

TUNED

STEREO

MUTE

8L CH

10R CH

15RDS-DATA 14RDS-INT 13FM SIG OUT

2

CE

4 6 7

11

R-CH

FM

AM

(AEP, UK)

ST-DI

3

CLK

1

SYSTEM CONTROLLER

47 RDS.DATA 61

RDS_CLK RDS_SIGNAL

135

65 TUNER DO 66 TUNER LATCH 49 TUNER TUNED 48 TUNER ST 50 TUNER MUTE

IC1703 (1/6)

STR-DB798

INPUT SELECT

12 10

13 15

5 3

CH1IN2

CH2IN3 CH2IN2

CH3IN3 CH3IN2

IC1304

SW1

2

J301 (2/2)

24CH1OUTCH1IN3

22CH2OUT

20CH3OUT

SW2

PS

4

23

Y

PB/C

/B-Y

PR/C

/R-Y

OUT

COMPONENT

VIDEO

ASSIGNABLE

B

MONITOR

R

J301 (1/2)

Y

PB/C

PR/C

PB/C

/B-Y

PR/C

/R-Y

/B-Y

/R-Y

B

R

Y

B

R

TV/SAT

IN

COMPONENT

VIDEO

99UP CON SDA

100UP CON SCL

40C.PSAVE 39CSW1 34CSW2

114VIDEO_SW1 115VIDEO_SW2 116VIDEO_SW3 117VIDEO_SW4

SDA

SCL

C.PSAVE

CSW1 CSW2

SW1 SW2 SW3 SW4

ASSIGNABLE

DVD IN

• R-CH is omitted due to same as L-CH.

• SIGNAL PATH

: TUNER

: VIDEO

VIDEO

VIDEO 3

INPUT VIDEO

TV/SAT VIDEO IN

DVD VIDEO IN

VIDEO VIDEO 2 OUT

VIDEO 2 VIDEO IN

VIDEO 1 VIDEO OUT

VIDEO 1 VIDEO IN

J1092

VIDEO 3

INPUT

S-VIDEO

J850 (2/2)

TV/SAT

S-VIDEO IN

J850 (1/2)

DVD

S-VIDEO IN

J852 (1/2)

VIDEO 1

S-VIDEO IN

J853 (1/2)

VIDEO 2

S-VIDEO IN

J1091 (1/2)

Y

C

Y

C

Y

C

Y

C

Y

C

J305

J304

VIDEO SELECTOR

IC301

V3

7

TV

3

LD

5

V2. OUT

11

V2. IN

9

V1. OUT

15

V1. IN

13

Y SWITCH

7

V3

9

V2. IN

3

TV

5

LD

13

V1. IN

C SWITCH

7

V3

9

V2. IN

3

TV

5

LD

13

V1. IN

IC851

IC850

SW4

SW3

SW2

SW1

M. OUT

SW5

SW2 SW3 SW1 SW4

V1.OUT

V2.OUT

M.OUT

SW5

SW2 SW3 SW1 SW4

V1.OUT

V2.OUT

M.OUT

SW5

CSW1

CSW2

C.PSAVE

SCL

VIDEO SYNC

7

SEPARATOR

X371

SDA

15 16

IC370

19

RELAY DRIVE

Q850, 851

-2

-1

27

25

RY850

C SYNC BUFFER

Q373

Y SYNC BUFFER

Q371

VIDEO

AMP

IC372

Y

C

Y

C

Y

C

J302

VIDEO

MONITOR

VIDEO OUT

J853 (2/2)

VIDEO 2

S-VIDEO OUT

J852 (2/2)

VIDEO 1

S-VIDEO OUT

J851

MONITOR

S-VIDEO OUT

VIDEO

SW4

SW1

SW2

SW3

6

4

10

14

1

D301

2

D302

10

4

14

6

15

11

1

2

D851

10

4

14

6

15

11

1

2

D850

VIDEO

BUFFER

Q372

CLOCK

GENERATOR

IC371

CHROMA IN

1

16

COMPOSITE IN

OUT

X' TAL

4

SYNC SEPARATOR

FSC

7

3.5795MHz (Taiwan)

4.43MHz (AEP, UK)

IC852

STR-DB798

1313

STR-DB798

6-2. BLOCK DIAGRAM – AUDIO DSP Section –

S-RAM IC1202

D0 – D15 A0 – A15

7 – 10, 13 – 16,

29 – 32, 35 – 38

5 – 1, 44 – 42,

27 – 24, 21 – 18

BCKO,

LRCKO

CS

WE

617

BCKO

F

(Page 15)

VIDEO

DIGITAL

VIDEO 2 AUDIO OUT

VIDEO 1 AUDIO OUT

(Page 17)

(Page 15)

VIDEO 3

INPUT DIGITAL OPTICAL

OPTICAL

DVD IN

OPTICAL

TV/SAT IN

OPTICAL

MD IN

COAXIAL IN

DVD

COAXIAL IN

SA-CD/CD

OPTICAL MD OUT

TV/SAT AUDIO IN

DVD AUDIO IN

VIDEO 2 AUDIO IN

VIDEO 1 AUDIO IN

VIDEO 3

INPUT AUDIO

DATA, CLK, LAT

C

SOURCE-L

D

DIGITAL OPTICAL

RECEIVER

DIGITAL OPTICAL

RECEIVER

DIGITAL OPTICAL

RECEIVER

DIGITAL OPTICAL

RECEIVER

J1101

DIGITAL OPTICAL

TRANSCEIVER

IC1081

IC1104

IC1105

IC1106

IC1107

J201

L

J202

L

J1091 (2/2)

IC1102

IC1151

AUDIO SELECTOR

IC201

2

3

4

5

7

8

10

CONTROL

1415 16

CLK

LAT

DATA

DIGITAL SELECTOR

IC1103

3 7

4

5

6

AB

14 2

B

A

A/D CONVERTER

IC1401

LOCK

XMODE

SERIAL I/O

INTERFACE

SYSCLK

DATAO

ERROR

LRCK

CKOUT

XSTATE

XMCK

XOUT

AUDIO

48

DOUT

LRCK

BCK

XIN

BCK

X1101

12.288MHz

18 SDI1

17 BCKI1 29 BCKI2

15 LRCKI1 28 LRCKI2

59 EXLOCK

30 SDI2

D1101

15

14

13

16

34

14 15 13

17

20

21

22

24

12

BUFFER

IC1402

DIN0

3

DIN1

4

DIN2

5

DOUT

2

47

LIN

1

CONVERTER

SIGNAL-END

DEFERENTIAL

CLOCK/

TIMING CONTROL RESET

/POWER CONTROL

DIGITAL AUDIO INTERFACE RECEIVER

INPUT

CIRCUIT

CKSEK1

IC1101

DATA

DEMODULATOR

TIMING

CLOCK

MICON INTERFACE

DICECLK

36 38 37 35

DO

DIGITAL

MODULATOR

RSTB

6

DETECT

GP8

69

108, 107, 105 – 102,

99, 98, 80 – 77,

D0 – D15

MCLK112MCLK2

KFSIO

9

22

X1201

13.9MHz

75 – 72

A B CKSEL1 DI CLK CE DO XMODE

91 ADC:RST

69 OPT SEL2 70 OPT SEL1 74 CKSEL1 79 DI 75 CLK 76 CE 80 DO 73 XMODE

112, 110, 109,

97 – 92, 82 – 85,

66 – 64

A0 – A15

AUDIO DIGITAL

SIGNAL PROCESSOR

IC1201

HCS34HCLK

HDIN35HDOUT32HACN

36

33

104103

90

89

102

HDIN

HCLK

HDOUT

DSP_HCS

SYSTEM CONTROLLER

DATA071XSTATE

72

SDCLK

GP9

68

113

37

87

88

84

GP12

DSP GP9

DSP_HACN

IC1703 (2/6)

FUNC_MUTE

121

25

4445

CSO

WEO

PM

XRST

2

SIGNAL

SELECTOR

IC1204

86

82

PM1

XRST

EEPROM SDA EEPROM SCL

DIR ERROR

ANALOG_DIGITAL

D1601

67

58X057

16.5MHz

6

1

85

LRCK SW

X1601

23SDO1 24SDO2 25SDO3 26SDO4

20BCKO 19LRCKO 67GP10

BST

56

5

2

DSP_BST

78AUDY_DATA 81AUDY_CLK 28AUDY_DATA_IN 29AUDY_LATCH 30AUDY_RESET

X1

EEPROM

IC1604

SDA

5112 6111

SCL

MUTING SWITCH

Q1602

MUTING SWITCH

Q1601, 1603

SWITCHING

IC1503

CLOCK

BUFFER

IC1950

LIP SYNC ADJUST

IC2010

A0 – 11

47FLFRO 46SLSRO 45CSWO 44DLDRO

100 1 – 5 7 8

90 – 95 97 98

17 – 22

24 – 29

10WE 11CAS 12RAS 13CS 14CLK 15CKE

66 FLFRI 65 SLSRI 64 CSWI 63 DLDRI

60 BCKI 59 LRCKI

68 CLK512

D0 – D15

74 SI 72 SCLK 75 SO 73 XCS 70 XRST

• R-CH is omitted due to same as L-CH.

• SIGNAL PATH

SDO1 SDO2 SDO3 SDO4

DQ0 – 15

2 3 5 6 8 9 11 12 39

40 42 43 45 46 48 49

A0 – 11

19 – 24

27 – 32

15 WE 16 CAS 17 RAS 18 CS 35 CLK 34 CKE

SD-RAM

IC2050

SDO1, SDO2,

SDO3, SDO4

S MUTE

SCLKO

E

(Page 15)

G

(Page 15)

H

(Page 15)

: AUDIO (ANALOG)

CKSEL1

DI

CLKCEDO

XMODE

: AUDIO (DIGITAL)

STR-DB798

1414

6-3. BLOCK DIAGRAM – AUDIO CONTROL Section –

J101

FRONT

L

SURR

MULTI CH IN

AUDIO

(Page 13)

B

D

(Page 14)

E

(Page 14)

F

H

(Page 14)

AUDIO

TUNER-L

SOURCE-L

SDO1, SDO2, SDO3, SDO4

BCKO, LRCKO

SCLKO

PHONO IN

MD/TAPE IN

MD/TAPE OUT

SA-CD/CD IN

CENTER

SUB WOOFER

SDO1 SDO3 SDO2 SDO4

BCKO LRCKO

L

J151

L

J131

L

DATA1

45

DATA2

46

DATA3

47

DATA4

31

BCK

40

LRCK

41

SCKI

38

INTERFACE

SERIAL INPUT

PHONO EQ AMP

IC131

D/A CONVERTER

IC1501

DIGITAL FILTER

MULT-FUNCTION

X8 OVER SAMPLING

D/A

CONVERTER

LPF

AMP

LPF

AMP

LPF

AMP

LPF

AMP

VOUT1

VOUT2

VOUT3

VOUT4

VOUT5

VOUT6

STR-DB798

AUDIO SELECTOR

IC101

9 5.1FL

12 5.1SL

28 5.1 C

15 5.1SW

2 PHONO

3 MD IN

4 MD OUT

5CD

6 TUNER

7 A/D, V 8 2CH

R-CH

BUFFER

IC1521

BUFFER

IC1541 (1/2)

BUFFER

IC1541 (2/2)

BUFFER

IC1561

MUTING

Q401

MUTING

Q601

MUTING

Q751

MUTING

Q501

10

D/AFL

26 D/A C

17 D/ASW

13 D/ASL

14

13

12

11

10

9

FLOUT

DATA21CLK23LAT

22

11

24COUT

19SWOUT

14SLOUT

LINE AMP

IC110

LINE AMP

IC111 (2/2)

LINE AMP

IC111 (1/2)

LINE AMP

IC112

BUFFER

+

IC171

VRIN

20

VRIN

9

LEVEL SHIFT

CIRCUIT

CLK17LAT

DATA

13

16

CLK

DATA

VRIN

20

LEVEL SHIFT

CIRCUIT

CLK17LAT

DATA

13

16

AUDIO SELECTOR

26 25

27

23

CONTROL

DATA

OUT

23

TRIM

24

TRIM

25

OUT

6

TRIM

5

TRIM

4

LAT

OUT

23

TRIM

24

TRIM

25

IC173

1415 16

CLK

LAT

BUFFER

IC602 (2/2)

BUFFER

IC602 (1/2)

ELECTRICAL

VOLUME

IC601

BUFFER

IC502

ELECTRICAL

VOLUME

IC501

VRIN

20

22

2117

19

LEVEL SHIFT

CIRCUIT

DATA

16

DATA

CLK17LAT

13

CLK

LAT

OUT

TRIM

23

24

25

ELECTRICAL

VOLUME

BUFFER

IC402

IC401

FL

J

(Page 16)

C

K

(Page 16)

J803

SUB WOOFER

AUDIO OUT

RY807

• R-CH is omitted due to same as L-CH.

RELAY DRIVE

Q826

• SIGNAL PATH

: TUNER

: AUDIO (ANALOG)

: AUDIO (DIGITAL)

SL

L

(Page 16)

(Page 14)

G

STR-DB798

S MUTE

MODE CONTROL

INTERFACE

MDI35MC36ML37RST33MDO

34

LPF

AMP

108 DA1DO

93 DA1LAT 92 DAC_RST 95 DAC_MDI 94 DACCLK

MUTING

CONTROL

VOUT7

VOUT8

16

20

R-CH

SYSTEM CONTROLLER

IC1703 (3/6)

Q813

BUFFER

IC1581

6CTR/SW RY

MUTING

Q701

DATA

CLK

LAT

CLK

CIRCUIT

CLK17LAT

13

CLK

LAT

OUT

TRIM

23

24

25

ELECTRICAL

VOLUME

BUFFER

IC652

IC651

SBL

DATA, CLK, LAT

SW

M

(Page 16)

(Page 17)

Q

(Page 17)

P

R

DATA

VRIN

20

LEVEL SHIFT

DATA

16

DATA

(Page 16)

1515

STR-DB798

6-4. BLOCK DIAGRAM – AUDIO AMP Section –

J

(Page 15)

K

(Page 15)

R-CH

RY806

RELAY DRIVE

Q823

FL

PRE DRIVE

Q2201, 2203

BIAS

Q2204, 2205

BIAS

Q2206

RV631

BIAS

Q631, 634

BOOSTER

Q602

BOOSTER

Q603

D411

CURRENT

DETECT

Q632, 633

RELAY DRIVE

Q809

RY449

R-CH

TM699

+ –

– +

TM449 (1/2)

+

RY444

RELAY DRIVE

D611

C

PRE DRIVE

Q2001, 2003

BIAS

Q2004, 2005

BIAS

Q2006

RV431

BIAS

Q431, 434

BOOSTER

Q402

BOOSTER

Q403

D711

CURRENT

DETECT

Q432, 433

CURRENT

DETECT

Q732, 733

Q808

R-CH

RY649

–

– +

TM444

+ –

J1086

PHONES

L

FRONT A

R

L

FRONT B

R

CENTER

SPEAKERS

SBL

M

(Page 15)

SL

L

(Page 15)

• R-CH is omitted due to same as L-CH.

• SIGNAL PATH

: AUDIO (ANALOG)

PRE DRIVE

Q2701, 2703

PRE DRIVE

Q2401, 2403

BIAS

Q2704, 2705

BIAS

Q2706

BIAS

Q2404, 2405

BIAS

Q2406

RV731

BIAS

RV531

BIAS

Q731, 734

BIAS

Q531, 534

SYSTEM CONTROLLER

IC1703(4/6)

BOOSTER

Q702

BOOSTER

Q703

BOOSTER

Q502

BOOSTER

Q503

LIMITER.IN

HP DETECT

SURR.RY

SP.A.RY

PROTECTOR

H/P RY

SB.RY

+

L

RY699

R-CH

D511

OVER VOLTAGE

+

134

41

5

3

2

4SP B RY

7

118

DETECT

Q822

CURRENT

DETECT

Q532, 533

B+

AF POWER

PROTECTOR

Q802, 803,

Q805

RELAY

DRIVE

Q807

RY549

RELAY DRIVE

Q811

R-CH

D818

D812D819D816

D820

–

+

–

TM449 (2/2)

+ –

– +

SURR BACK

R

L

SURR

R

SW

R

(Page 15)

STR-DB798

1616

6-5. BLOCK DIAGRAM – DISPLAY, KEY CONTROL Section –

REMOTE

CONTROL

RECEIVER

IC1051

SYSTEM CONTROLLER

63 SIRCS

IC1703 (5/6)

STR-DB798

17+/–.JOG (4A) 16+/–.JOG (4B)

ROTARY

ENCODER

RV1051

MENU

A

(Page 13)

C

(Page 14)

P

(Page 15)

Q

(Page 15)

DATA, CLK

DATA, CLK, LAT

DATA

CLK

LAT

DATA

CLK

LAT

8

LEVEL SHIFT

3

11

IC804

19+/–.JOG (3A) 18+/–.JOG (3B)

13VOL.JOG (1A) 12VOL.JOG (1B)

11FUNCTION.JOG (2A) 10FUNCTION.JOG (2B)

133

AD2

132

CLK

9

10

2

1 13 12

DATA

8

3

LEVEL SHIFT

11

6

IC805

Q810

9

10

2

1 13 12

5

4

D+5V

21 VOL IC/TUNER DATA

22 VOL IC/TUNER CLK

23 VOL LAT

120 FUNCTION.SW.LAT

AD1

SP SW

S1057

SPEAKERS

20

S1050

I

/ 1

62POWER.ON/OFF

ROTARY

ENCODER

RV1052

ROTARY

ENCODER

RV1060

ROTARY

ENCODER

RV1061

FLUORESCENT INDICATOR TUBE DRIVER

–/+

MASTER VOLUME

INPUT

SELECTOR

S1051 – 1054,

S1056, 1061,

S1062, 1065

S1041 – 1047

IC1001

1LED1

2LED2

D1031

MULTI CHANNEL DECODING

LED DRIVE

Q1032

DIMMER

CONTROL SWITCH

Q1031

D+5V

STR-DB798

42 – 31

15FL DATA

LEVEL SHIFT

14FL CLK

113FL STB

IC1006

7 DIN 8 CLK 9 STB

GRID1 – GRID12

14 – 29

SEG1 – SEG16

FL1603

FLUORESCENT

INDICATOR

TUBE

1717

STR-DB798

6-6. BLOCK DIAGRAM – POWER SUPPLY Section –

MUTING +5V

TUNER +9V

+3.3V

TUNER +3.3V

(AEP, UK)

A+5V

REGULATOR

IC1905

+5V

REGULATOR

Q824

+9V

REGULATOR

IC1902

+5V

REGULATOR

IC1403

+15V

BIAS

B–

BIAS

B+

LIMITER SWITCH

Q2602

LIMITER SWITCH

Q2601, 2603

+15V

REGULATOR

IC955

+24V (RY)

(AEP, Taiwan)

S901

IMPEDANCE

SELECTOR

8Ω

4Ω

-1

B–

RECT D914

-2

B+

RECT

D903 – 906

T901

MAIN POWER

TRANSFORMER

F1

SYSTEM CONTROLLER

IC1703 (6/6)

–15V

FL –18V

+5V

V+5V

D+3.3V

119LIMITER,OUT

42D.POWER

43V.POWER

55RSTX

8SUB T

60STOP

+3.3V

+2.6V

STBY +3.3V

REGULATOR

IC952

+3.3V

REGULATOR

IC1903

+3.3V/+2.6V REGULATOR

IC1901

RESET SIGNAL

GENERATOR

IC1602

B+ SWITCH

Q1957, 1958

REGULATOR

IC1904

+3.3V

B+ SWITCH

Q956, 957

D+5V

V–5V

– 15V

REGULATOR

IC954

–18V

REGULATOR

Q903

+5V

REGULATOR

IC1953

–5V

REGULATOR

IC951

D909

D1908

B– SWITCH Q953 – 955

B+ SWITCH

Q52, 53

FLUORESCENT

INDICATOR TUBE

(FL1603)

RECT

D912, 913,

915, 916

RECT D908

RECT

D54 – 57

RECT

D58

AC POWER

DETECT

Q54

D52

D53

F1

F2

F904

F903

T2

SUB POWER

TRANSFORMER

J50

-AC IN

RY1

RELAY DRIVE

Q51

STR-DB798

1PW RY

1818

STR-DB798

d

• Note for Printed Wiring Boards and Schematic Diagrams

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• : 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.

• Indication of transistor

C

B

Q

B

E

Q

CE

These are omitted.

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. (p: pF) 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/ specified.

• f : internal component.

• 2 : nonflammable resistor.

• C : panel designation.

Note: The components identified by mark 0 or dotted line

with mark 0 are critical for safety. Replace only with part number specified.

• A : B+ Line.

• B : B- Line.

• H : adjustment for repair.

• Voltages and waveforms are dc with respect to ground

under no-signal conditions. no mark : TUNER (): VIDEO 1

• Voltages are taken with a V OM (Input impedance 10 MW). Voltage variations may be noted due to normal production tolerances.

• Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : TUNER J : AUDIO (ANALOG) c : AUDIO (DIGITAL) E : VIDEO

• Abbreviation TW : Taiwan model

4

W or less unless otherwise

• Circuit Boards Location

HP-V3 board

DC PWR board

DISPLAY board

AC board

FUNC board

4-8 OHM board (AEP, Taiwan)

COMP-V boar

VOL board

DIRECT board

SPK-B board

STAY-5 board

FAN board

MAIN board

STAY-1 board

A CLASS board

SPK-A board

S-VIDEO board

VIDEO board

VIDEO-AU board

AU-IN board

tuner

A/V SYNC boar

DIGITAL board

STAY-2 board

STR-DB798

1919

STR-DB798

6-7. PRINTED WIRING BOARD – DIGITAL BOARD (Component Side) –

1 2 3 4 5 6 7 8 9 10 11 12

A

(Page 26)

A/V SYNC BOARD

64

DIGITAL BOARD

(COMPONENT SIDE)

B

R1127

C

C1127

IC1103

R1120

R1121

D

E

F

G

H

R1122

R1105

JR1005

R1104

C1101

R1123

FB1101

C1154

R1154

R1118

R1117

R1107

C1104

FB1105

FB1503

R1508

D1001

C1124

R1109

C1115

148

R1114

4

C1114

48 37

1

12

13 24

IC1101

FB1104

R1112

IC1503

135

R1507

C1117

IC1102

5

R1119

R1111

R1102

R1649

D1101

R1501 48 37

1

12

13 24

IC1501

R1570

R1108

R1503

R1437

R1594

C1152

C1129

36

25

R1502

R1560

R1100

FB1407

R1124

C1110

C1109

R1110

R1113

C1133

C1113

X1101

36

R1506

25

C1593

I

CN2001

(AEP, UK)

R1705

R1711

R1710

C1230

FB1210

C1234

R1206

R1207

R1209

7

IC1950

5

C1573

8

R1564

C1235

R1226

R1208

R1202

1

148

1516

CNS551

FB1509

R1509

FB1508

IC1581 IC1561 IC1541

5

8

R1584

130

4

C1583

1

R1574

R1213

R1212

1

30

31 60

R1450

R1540

4

C1563

C1553

1

• See page 19 for Circuit Boards Location.

IC1521

5

8

D1907

R1308

R1645

R1662

R1646

R1204

R1603

4

1

R1520

R1530

4

1

C1523

R1214

R1550

R1215

5

8

IC1202

R1216

R1217

IC1201

R1218

R1219

R1220

R1224

4

1

R1221

C1543

R1222

122

4423

91120

IC1204

90

61

5

8

C1533

D1906

D1905

C1100

R1673

R1674

JR1688

R1680

R1643

R1630

R1605

R1612

R1608

R1671

IC1402

1

4

R1606

13

24

R1681

C1312

8

R1684

5

R1610

IC1401

C1410

R1663

FB1401

R1607

C1401

R1644

R1647

R1611

R1648

R1694

R1604

R1609

IC1604

1

4

: Uses unleaded solder.

L1901

FB1601

R1722

R1601

73

108

109 144

R1620

12

1

8

5

R1724

IC1703

R1639

R1679

R1690

IC1602

C1670

R1677

R1678

R1676

C1619

R1664

R1665

D1601

R1667

C1612

R1669

R1625

C1958

135

3772

(TW)

C1640

R1634

R1642

E

36

1

R1623

R1624

4

R1716

C1601

Q1602

R1698

R1638

R1629

E

R1958

R1957

R1615

R1614

R1613

E

Q1601

Q1603

C1959

Q1958

R1027

R1026

D1602

R1025

R1622

R1600

R1024

R1658

R1696

R1693

R1692 R1651

R1650

R1699

R1602

R1637

R1028

R1656

C1615

C1634

R1641

R1653

R1652

R1714

R1715

R1633

R1657

R1640

R1018

R1019

R1683

• Semiconductor Location

Ref. No. Location

D1001 G-2 D1101 F-2 D1601 H-10 D1602 H-10 D1604 H-11 D1905 C-8 D1906 C-7

R1020

FB1604

D1604

11

(11)

1-867-430-

D1907 C-7 IC1101 D-2

IC1102 H-2 IC1103 C-2 IC1201 F-5 IC1202 D-5 IC1204 G-6 IC1401 G-8 IC1402 H-8 IC1501 G-3 IC1503 F-2 IC1521 G-6 IC1541 G-5 IC1561 G-4 IC1581 G-3 IC1602 D-10 IC1604 F-8 IC1703 F-9 IC1950 F-4

Q1601 N-10 Q1602 N-10 Q1603 G-10 Q1958 C-10

STR-DB798

2020

STR-DB798

6-8. PRINTED WIRING BOARD – DIGITAL BOARD (Conductor Side) –

1 2 3 4 5 6 7 8 9 10 11 12 13

A

B

C

D

E

F

G

H

I

2

DC PWR

BOARD CN907

(Page 48)

52

COMP-V

BOARD

CNP3052

(Page 32)

1

MAIN BOARD CN419

(Page 36)

53

MAIN BOARD

CNP419

(Page 36)

3

DISPLAY

BOARD

CN1001

(Page 46)

DIGITAL BOARD

CNP352

1

11

FB1605

(CONDUCTOR SIDE)

CN1110

7

D1908

1

4

3

CN1106

CN1112

1

CN1105

R1704

R1703

R1712

R1713

FB1603

R1695

R1675

R1702

R1701

IC1904

13

C1911

C1416

C1407

R1655

C1411

C1675

R1661

C1676

R1632

C1413

C1912

IC1953

CN1104

(NC)

R1022

R1023

C1638

R1021

C1659

C1658

C1609

C1608

C1611

C1610

C1613

C1614

C1639

R1627

R1628

C1618

Q1957

(FOR CHECK)

C1606

C1605

R1636

C1624

C1631

C1632

C1602

13

BCE

JR1111

C1627

R1305

C1617

FB1602

R1304

C1626

JR1212

C1671

R1635

C1620

R1654

C1674

C1673

R1697

R1720

R1666

R1685

C1635

X1601

C1406

C1404

R1691

C1957

R1687

C1672

R1719

R1626

R1682

• See page 19 for Circuit Boards Location.

IC1902

1

C1913

3

JR1211

R1670

C1522

C1524

JR1219

C1532

R1532

R1522

R1521

R1524

CN1102

5

R1523

MAIN BOARD

CN403

(Page 36) (Page 36)

C1603

C1415

R1434

R1717

C1405

R1431

R1718

R1402

R1432

C1906

C1905

CN1107

12

R1659

R1401

C1403

C1408

C1414

R1424

C1412

C1908

IC1901

13

24

R1631

R1660

R1422

1

C1409

C1402

R1421

R1619

R1618

R1617

C1417

3

IC1403

C1418

C1203

R1533

JR1201

C1534

R1534

C1218

C1914

C1206

C1233

R1531

(AEP, UK)

IC1905

C1205

C1220

C1542

R1542

R1541

: Uses unleaded solder.

ANTENNA

AM

COAXIAL FM 75Ω

TUNER

• Semiconductor Location

R1101

FB1202

C1134

R1591

C1131

R1593

FB1201

R1504

R1592

C1509

C1550

IC1903

C1909

FB1102

C1108

C1510

C1594

C1511

JR1218

C1910

C1111

C1105

C1507

C1106

C1514

FB1501

C1112

JR1217

C1505

C1151

EB1101

COAXIAL IN

(CHASSIS)

11

(11)

(CHASSIS)

DVD

SA-CD/CD

IC1104

OPTICAL

DVD IN

IC1105

OPTICAL

TV/SAT IN

IC1106

OPTICAL

MD IN

IC1107

OPTICAL MD OUT

J1101

IC1104

C1126

IC1105

R1115

C1103

R1106

C1502

D1501

D1502

C1107

C1102

C1501

C1116

IC1151

85

14

IC1106

IC1107

C1119

R1151

C1123

3

C1120

1

3

C1121

1

3

C1122

1

3

1

R1116

R1156

C1153

R1153

R1152

1-867-430-

14

R1364

R1583

15

C1221

C1309

FB1502

R1590

R1580

C1592

R1582

R1581

C1584

C1582

X1201

C1572

R1572

R1573

C1311

CN1103

R1205

R1314

6

FB1203

CN1101

(AEP, UK)

C1231

C1950

R1571

C1574

MAIN BOARD

CN402

C1915

3

1

JR1121

C1554

R1554

JR1215

C1210

C1209

C1201

2

C1310

C1227

C1212

C1211

C1208

C1219

R1201

C1216

JR1216

C1562

R1562

R1561

R1563

C1564

1

C1916

C1214

JR1210

C1213

R1203

C1207

R1210

C1204

JR1214

C1202

C1552

R1552

R1551

R1553

R1543

C1544

R1544

Ref. No. Location

D1501 G-11 D1502 G-11 D1908 C-2

IC1104 C-12 IC1105 D-12 IC1106 E-12 IC1107 F-12 IC1151 H-11 IC1403 H-6 IC1901 C-6 IC1902 C-7 IC1903 B-10 IC1904 B-5 IC1905 C-8 IC1953 C-3

Q1957 C-3

DIGITAL

STR-DB798

2121

STR-DB798

6-9. SCHEMATIC DIAGRAM – DIGITAL BOARD (1/4) –

(1/4)

DIGITAL

COAXIAL IN

DVD

COAXIAL IN

SA-CD/CD

OPTICAL

DVD IN

OPTICAL

TV/SAT IN

OPTICAL

MD IN

OPTICAL

MD OUT

(CHASSIS)

J1101

IC1104

TORX147L

IC1105

TORX147L

IC1106

TORX147L

IC1107

TOTX141L

R1116

R1156

75

DIGITAL OPTICAL

RECEIVER

DIGITAL OPTICAL

RECEIVER

DIGITAL OPTICAL

RECEIVER

DIGITAL OPTICAL

TRANSCEIVER

C1151

R1151

22

50V

470

R1120

C1120

R1121

C1121

R1123

C1122

C1123

R1122

100

0.1

100

0.1

100

0.1

100

C1124

0.1

C1119

22 50V

C1152

R1127

100

R1117

470

C1114

1p

GND

0.1

GND

• See page 52 for Waveforms. • See page 53 for IC Block Diagrams. • See page 61 for IC Pin Function Description.

A

XMODE

FB1104

R1112

CKSEL1

DIGITAL AUDIO

INTERFACE RECEIVER

IC1101

LC89056W-E

5 0 1 1 B F

0

22

BCKI

LRCKI

R1437

100

0 8 6

4 1 1 1

FB1407

R

C1126

10

50V

DIGITAL SELECTOR

IC1103

TC74ACT153AF

B

C1116

R1118

470k

9 1

k

1

7

1

4

R

VCC

R1109

R1152

470k

R1153C1153

47k1p

VCC

R1154

C1117

1000

6.3V

TC7WU04F

0

TC7WU04F

0

BUFFER

IC1102

BUFFER

IC1151

C1115

C1154

0.1

47p

FB1503

R1508

R1106 R1105

C1104

0.01

D1001

1SS352-TPH

100

C1127

0.1

C1107

33k 4.7k

SCKI

C1113

0.1

C1111

0.1

C1102

47

25V

C1103

0.1

C1106

0.1

0.01 R1107

5.6k

R1104C1101

1000.1

C1108

0.1

C1105

47

25V

FB1101

SWITCHING

TC7SH08FU

JR1005

IC1503

C1112 R1115

0.01 10k

0

R1507

100

CLK

12.288MHz

XMCK

CE

C1129

0.001

R1100 C1110

1M 18p

X1101

C1109

FB1501

C1505

0.1

FB1102

R1101

10k

R1110

C1134C1133

R1113

D1101

1SS352-TPH3

R1102

10k

R1108

100

R1111

1k

47 25V0.1

C1131R1124

100p100

18p

1k

XSTATE

D I

DO

DATA0

GP8

DATA

LRCKI2

BCKI2

KFSIO

X1

X2

X3

X4

X5

X6

Z1

Z2

Z3

Z4

(Page 25)

(Page 23)

STR-DB798

1 Y

2 Y

3 Y

(Page 24)

2222

STR-DB798

6-10. SCHEMATIC DIAGRAM – DIGITAL BOARD (2/4) –

(2/4)

Z1

Z2

Z3

(Page 22)

(Page 27)

Z4

CNS551

30P

BCK

LRCK

DIR DATAO

D01

D03

D02

D04

LRCKO

BCKO

D/A MCK

T/A-SO

T/A-XCS

T/A-XRST

GND

DSP SD01

DSP SD02

DSP SD03

DSP SD04

COM-DATA

COM-CLK

GND

+3.3V

GND

FB1509

COM_DATA

COM_CLK

DATA1

DATA2

DATA3

DATA4

LRCKO

D/A_MCK

XCS

XRST

SDO1

SDO2

SDO3

SDO4

BCKO

SO

C1231

C1212

C1205

C1203

C1204

C1230

C1211

1000

C1206

C1207

C1209

R1203

C1210

0.1

470 10V

0.1

0.1 A1

A0

0.1 A8

A5

0.1 A6

A7

D15

10V

0.1

C1216

100p

10k

0.1

R1222

D14

R1221

D13

R1220

D12

R1219

D11

R1218

D10

R1217

D9

R1216

D8

R1215

R1214

A9

R1213

A10

R1212

A11

• See page 52 for Waveforms. • See page 53 for IC Block Diagrams. • See page 61 for IC Pin Function Description.

JR1121

100

D1

D2

D3

D4

D5

D6

D7

A15

A13

A12

A14

220

AUDIO DIGITAL SIGNAL PROCESSOR

IC1201

CXD9718BQ

GP8

C1213 C1214

R1204C1218

1k100p

A3

A2

D0

A4

C1202

0.1

WE

CS

C1201

0.1

0.1 0.1

A14

A13

A12

A9

A10

A11

FB1201

FB1202

A4

A3

A2

D1

D2

D3

D4

D5

D6

D7

WE

A15

A1

A0

CS

D0

S-RAM

IC1202

IS61LV6416-15T

V1

V2

(Page 25)

A8

R1224C1220

100100p

D11

D10

D9

D8

SDCLK

HCS

HDOUT

HCLK

HDIN

HACN

D15

D14

D13

D12

A5

A6

A7

V3

FB1210

C1208

0.1

S

X1201

13.9MHz

R1201

10k

R1226

0

C1235C1234

27p27p

FB1203

KFSIO

2

1

W

100

1207

1206

R1209

R1208

R

SDO3

SDO2

SDO1

SD04

LRCKI2

BCKI2

R1205

JR1201

100

R1202

100

0

DATA

FB1508

D/A_MCK

C1950

0.1

BCKO

SCKI

C1219

0.1

R1210

10k

PM1

XRST

IC1950

TC74VHC08FT

CLOCK BUFFER

C1233

0.1

SIGNAL SELECTOR

IC1204

TC7WH157FU

DSP

LRCKO

(Page 24)

STR-DB798

2323

STR-DB798

6-11. SCHEMATIC DIAGRAM – DIGITAL BOARD (3/4) –

TUNER

100

R1705

-D S D R

(AEP,UK)

R1401

1k

C1221

R1711

-I S D R

0.1

C1408

C1405

100

R1710

IG S

M F

LRCKI

BCKI

XMCK

470p

C1402 47 25V

C1401

0.1

E T

E

U

T

M

S

0.1

C1309

C1311

(Page 22)

(3/4)

R1364

0

R1314

0

Y2

Y1

Y3

C1409

47

25V

R1450

100

2.2k

R1402

FB1401

• See page 52 for Waveforms. • See page 53 for IC Block Diagrams.

(Page 23)

W2

IC1905

BA33BC0T

IO

99

G

C1915 C1914

47

+3.3V REGULATOR +9V REGULATOR

16V

DATA4

R1504

10k

C1509

0.1

R1506

100

RST

SCKI

BCKO

LRCKO

DATA1

DATA2

DATA3

FB1502

C1501

SCKI

R1509

100

C1502

330

0.1

10V

R1502

100

R1503

100

R1501

100

0.1

C1310

N U T

T A L

0.1

C1227

A/D CONVERTER

I D T S

IC1401

PCM1800

O

K

D

L

T

C

S

CN1103

11P (EXCEPT AEP,UK)

15P

(AEP,UK)

COAXIAL FM 75Ω

C1407

C1406

C1404

C1403

ANTENNA

AM

C1410

0.1

C1416

0.1

4.7 50V

10 50V

C1411

W1

B T

0.1

S R

C1916

0.1

(AEP,UK)

IC1902 TA7809

IO

G

47

25V

I

L

C

O

D

M

D/A CONVERTER

IC1501

PCM1609

C1913

0.1

U1

(Page 25)

D1502C1514

1SS3670.1

D1501 1SS367

-T3

C1550

220 10V

C1510

0.1

C1511

0.1

C1507

10 50V

U2

(Page 37)

CN1101

20P

SOURCE-L

GND

SOURCE-R

SBL

SBR

SL

SR

SW

C

FRONT-L

GND

FRONT-R

GND

TUNER-L

TUNER-R

+15V

-15V

SUB-T

PW-RY

STOP

SOURCEL

SOURCER

FRONTL

FRONTR

SBR

PWRY

8.2k

R1570

R1560

R1550

+5V REGULATOR

IC1403

7805

IO

G

C1417

470 16V

IC1402

R1421

33k

SBL

SL

SR

SW

C

L E C R U O S

SUBT

STOP

M5218AFP-T

VCC

VEE

BUFFER

C1414 C1415

220p 220p

C1418

0.1

R1432R1422

33k33k

C1592

0.0018

R1431

33k

R1434R1424

100k100k

22k

1.5k

R1592

R1591

180p

C1593

R1593

1k

C1594 C1584 C1574 C1564 C1554 C1544 C1534 C1524

100 25V

R E C R U O S

L B S

C1412C1413

0.10.1

VEE

VCC

BUFFER

R1584 R1574 R1564 R1554 R1544 R1534 R1524

R1594

100k 100k 100k 100k 100k 100k 100k

100k

R1581

1.5k

R B S

C1572C1582

0.00180.0018

R1571

1.5k

22k

R1582

180p

C1583

R1583 R1573 R1563 R1553

1k 1k 1k 1k

100 25V

22k

R1572

180p

C1573

100 25V

R S

M5218AFP

VCC

IC1561

VEE

BUFFER

R1540

R1590

R1580

C1562

C1552

0.0018

22k

R1552

1.5k

R1551

180p

C1553

100 25V

1.5k

R1561

R1562

180p

C1563

100 25V

L S

8.2k

R1530

R1520

8.2k

C1522

0.0018

C1542

C1532

0.0018

IC1541IC1581

M5218AFPM5218AFP

VCC

BUFFER

W S

22k

1.5k

R1541

R1542

180p

C1543

R1543 R1533 R1523

1k 1k 1k

100 25V

C

R1532

FRONTR

0.0018

22k

IC1521

1.5k

R1531

180p

C1533

100 25V

M5218AFP

VEEVEE

VCC

BUFFER

FRONTL

R1521

C1523

100 25V

22k

1.5k R1522

180p

STR-DB798

2424

STR-DB798

6-12. SCHEMATIC DIAGRAM – DIGITAL BOARD (4/4) –

4

X2

X5

X

(4/4)

CNP352

(Page 33)

(Page 23)

(Page 24)

11P

PS SAVE

SW1

SW2

PNR

RESET

SDA

SCL

V-POWER

+8V

GND

-8V

V1

V2

V3

U1

U2

100

R1025

R1026

R1020

R1019

R1018

PS

100

SW1

100

SW2

100

PNR

100

RESET

V-POWER

C1906

D1905

C1908

D1906

XMODE

CKSEL1

CLK

CE

COM_DATA

DI

DO

COM_CLK

R1631

10k

C1675

0.1

C1676

0.1

S

SDCLK

DSP

XRST

PM1

HCS

HACN

RSTB

RST

ML

MC

MDI

HDOUT

HDIN

HCLK

MDO

C1312

0.1

R1643

R1694

R1644

R1645

R1662

R1646

R1647

R1663

R1630

R1632

R1603

R1606

R1607

100

R1604

100

R1605

100

R1620

1k

R1608

1k

R1611

1k

R1609

100

R1612

0

R1724

0

R1722

100

R1617

100

R1618

100

R1619

1k

R1610

• See page 52 for Waveforms. • See page 61 for IC Pin Function Description.

(Page 22)

1SR154-400 TE-25

+2.6V/+3.3V

REGULATOR

470 16V

1SR154-400 TE-25

470 16V

1SR154-400 TE-25

1k

100

1k

100

1k

R1719

R1718

R1659

R1660

C1672

0.1

BR24C16F-E2

10k

R1661

R1670 100

R1671 100

EEPROM

IC1604

D1907

LAT

STDO

A

B

DATA0

0.1 XSTATE

24

VINVOUT2

1

C16

T U O

VC

V

GND

0k 1

1k

01

1654

16

R

10k

R1684

C1627

10

50V

3.3k

C1671

0.1

00k 1

1626 R

FLASH1

1k

49 16

R

00k 1

1682 R

FLASH2

1k

648

674

1

R

1k

81

80

16

R

0 10

1k

679

678 1639 R

R1

SW2

SW1

RDS-I

POWER

SIRCS

00

1k

1

673 R1

1k

677 R1

SW3

X1601

1658

16.5MHz

R

687 R1

1k

676

690

667

685

1

R

SW4

FUN

LIMT

10k

C1635

0.1

R1666

10k

C1905

MD0

0.1

10k

635 1

1620 C

R

18

SYSTEM CONTROLLER

IC1703

MB91154PFV-G-125E1

C1619

R1720

10k

FLCS

0.1

STE

TUN

MUTE

RESET

MD2

R1636IC1901

C1605

0.1

PRO

RDS-D

k

100

1

5

4

10kSI-3004KWF

166

1308

R

100

9

166 R

C1613

0.022

C1614

0.022

R1627

1k

10k

1623

R1628

R

10k

R1691

10k

AD2

DET

AD1

FMSIG

HP SW

R1304

47k

V-POWER

R1305

47k

100

10k

7

3

6

R1657

163

165

10k

R

L E

.S B A D

(TW)

R1634C1631

47k0.1

R1697

∗

R1697

0(AEP,UK)

10k

(TW)

0.1

C1632

D1601

ISS352

MUTING

SWITCH

6

X1

X

Q1957

2SB733

Q1957,1958

B+ SWITCH

R1957

680

R1958

10k

C1957

FB1605

Q1958

RT1N141C-T

4700

16V

C1959

0.1

C1100

0.22

POWER

SIRCS

FB1603

SPSW

+

-

MENU+

MENU-

FB1604

HP SW

FLDATA

FLCLK

FLCS

VOL+

VOL-

FUNC+

FUNC-

AD2

AD1

MD2

MD0

RESET

FLASH2

FLASH1

STDI

CLK

FUNC

Q1603

R1717

FUN

SMUTE

SW4

SW3

SW2

SW1

LIMT

PRO

10k

SBRY

SWRY

SURRY

SPBRY

FRRY

HPRY

DET

+5V REGULATOR

IC1953

BA50BC0T

D1908

1SR154-400TE-25

+8V (DAB)

GND (D)

DAB-PWR5

DAB-PWR

CN1106

IO

G

C1958

0.22

CN1110

+8V STBY

-28V(FL)

-8V(V)

+8V(V)

GND(D)

+8V(D)

+8V(DAB)

CN1107

AC 6V

POWER

SP SW

MENU +

MENU -

V3 OPT

OPT GND

HP SW

DISP GND

FL DATA

FL CLK

FUNC+

FUNC-(STBY)

FLASH2

FLASH1

+5V(D)

FUNC-LAT

FUN LAT SW

S-MUTE

V-SW4

V-SW3

V-SW2

V-SW1

LIMITER

PROTECTOR

SW-RY

SUR-RY

SP-B-RY

HP-RY

DETECT

7P

2P

CN1112

AC 6V

CN1105

AC 6V

SIRCS

+3.3V

FL CS

CN1104

RESET

CN1102

SB-RY

FR-RY

(NC)

4P

(Page 49)

(Page 38)

3P

GND

31P

(Page 39)

GND

-/+ +

-/+ -

-28V

(Page 47)

+5V

VOL+

VOL-

AD2

AD1

7P

MD2

MD0

GND

(FOR CHECK)

VDD

20P

GND

DATA

CLK

(Page 37)

3 X

C1617

0.01

DAB-PWR

RESET

SMUTE

10k

0.1

PNR

SW2

C1659 C1658

0.01 0.01

C1609

Q1601,1602

MUTING

SWITCH

CD NC

OUT

0.01

C1608

0.01

11

C16

C1640

VSS

VCC

C1603C1634

0.10.1

L1901

0

C1911

0.1

100

R1021

100

R1022

100

R1023

0.01

R1024

0.01

10

39

38

16

C

220p

RESET

RESET SIGNAL

GENERATOR

IC1602

S-80929CNMC-

G8ZT2G

R1642

C1612

C1674

0.1

2SC2712-YG

DAB-PWR5

Q1602

PS

R1027 100

SW1

R1028 100

C1673

0.1

R1624

10k

R1625

10k

R1655

10k

+3.3V REGULATOR

IC1903

BA33BC0T

IGO

C1910

220 10V

JR1688

+3.3V REGULATOR

IC1904

BA33BC0T

IO

G

C1615

100p

1k

R1615

1k

R1614

1k

R1613

1k

R1696

10k

R1693

10k

R1692

10k

R1651

10k

R1650

100

R1640

100

R1641

10k

R1653

10k

R1652

10k

R1714

10k

R1715

2.2k

R1698

2.2k

R1638

2.2k

R1629

2.2k

R1699

2.2k

R1602

2.2k

R1622

2.2k

R1600

100

C1670 C1601C1626C1602

0.1 0.10.10.1

Q1601 D1602

RT1N141C-T ISS352

STOP

0

C1912

470 16V

XRST

XCS

SO

FUNC

CLK

STDI

SPSW

+

-

MENU+

MENU-

FLDATA

FLCLK

VOL+

VOL-

FUNC+

FUNC-

SUBT

SBRY

SWRY

SURRY

SPBRY

FRRY

HPRY

PWRY

C1909

0.1

B1602 F

C1606

47 25V

FB1601

C1618

0.1

1k

R1683

10k

R1695

10k

R1675

10k

R1702

10k

R1701

10k

R1704

10k

R1703

10k

R1712

10k

R1713

D1604

ISS352

R1716

10k

2SC2712-YG

STR-DB798

2525

STR-DB798

6-13. PRINTED WIRING BOARD – A/V SYNC BOARD –

1 2 3 4 5 6 7 8 9

A

A/V SYNC BOARD

16

(COMPONENT SIDE)

B

R2001

R2004

15

FB2002

C

C2002

• See page 19 for Circuit Boards Location.

64

30

CN2001

1

FB2001

C2050

DIGITAL BOARD

CNS551

(Page 20)

R2014

R2013

R2012

R2011

: Uses unleaded solder.

A/V SYNC BOARD

R2006 R2005

FB2003

C2026

C2025

(CONDUCTOR SIDE)

R2002

R2003

C2024

C2023

R2007

C2003

D

E

F

R2028

R2031

R2032

R2026

R2022 R2021

R2033

R2034

R2036

R2035

C2004

IC2010

R2037

R2038

R2041

R2042

C2007 C2008

R2052 R2051

1-864-874-

11

(11)

R2056

R2055

R2044

R2043

R2054

R2053

R2045

R2046

IC2050

C2021

C2009

C2010

C2011

C2022

R2024

R2027

R2025

R2023

R2050

R2049

R2048

R2047

1-864-874-

11

(11)

STR-DB798

2626

STR-DB798

6-14. SCHEMATIC DIAGRAM – A/V SYNC BOARD –

SD-RAM

IC2050

MSM56V16160F-8T

D1

D2

D3

D4

D5

D6

D7

WE

CAS

RAS

CS

A11

A10

A0

A1

A2

A3

C2026 C2025 C2024 C2023

0.1 0.1 0.1 0.1

• See page 61 for IC Pin Function Description.

C2004C2002 R2007C2003

0.10.1 10k0.01

R2028

100

R2027

100

R2026

100

R2025

100

R2024

100

R2023

100

R2022

100

R2021

100

R2031

100

C2011

0.1

C2010

C2021

C2022

0.1

CLK

CKE

A9

A8

A7

A6

A5

A4

0.1

O S

100

R2032

1 D

I S

100

R2033

2 D

S C X

100

R2034

3 D

K L C S

100

R2035

4 D

100

R2036

5 D

I

100

R2037

6 D

100

R2038

7 D

I R

FLF

0

R2050

E W

R S L S

0

R2049

S A C

R

W

D

S

L

C

D

LIP SYNC ADJUST

IC2010

CXD9722TQ

0

R2048

R2047

S A

S C

R

T S R X

FB2003

K L C

I

K

C

B

LR

FB2002

CN2001

100

R2011

100

R2012

100

R2013

100

R2014

0.1

C2007

C2008

0.1

R2056

0

R2055

0

R2054

0

R2053

0

C2009

0.1

0

R2046

R2045

R2044

R2043

R2042

R2041

R2051

R2052

E

0

1

K

A

C

3

2

1

0

A

8

9

A

C2050

100 16V

FB2001

FLFR0

SLSR0

CSW0

DLDR0

A4

A5

A6

A7

FLFRI

SLSRI

CSWI

DLDRI

SI

SCLK

FLFR0

CSW0

SLSR0

DLDR0

LRCKI

BCKI

SO

XCS

XRST

R2002

R2003

R2006

R2005

R2001

R2004

100

0

1k

30P

DSP SD01

DSP SD02

DSP SD03

DSP SD04

COM-DATA

COM-CLK

DIR DATAO

LRCKO

D/A MCK

T/A-SO

T/A-XCS

T/A-XRST

AD_DO

+3.3V

LRCK

BCKO

GND

BCK

(Page 23)

D01

D03

D02

D04

SDO

STR-DB798

2727

STR-DB798

6-15. PRINTED WIRING BOARDS – VIDEO Section –

1 2 3 4 5 6 7 8 9 10 11

A

VIDEO BOARD

B

JW307

C311

JW301

JW306

C

16

JW305

IC301

D

9

C315

JW303

1

JW304

8

JW302

E

JW309

C313

D301

D302

JW308

F

• See page 19 for Circuit Boards Location.

C301

R301

C302

R302

C303

C304

C305

R303

C306

R304

C307

R305

C308

C309

R306

C310

J302

MONITOR OUT

(CHASSIS)

VIDEO 1 IN

(CHASSIS)

VIDEO 1 OUT

VIDEO 2 IN

VIDEO 2 OUT

(CHASSIS)

DVD IN

J304

J305

VIDEO

: Uses unleaded solder.

8

HP-V3 BOARD

CN1091

(Page 30)

VIDEO-AU BOARD

3

1

CN202

JW218

14

1

IC201

C214

JW220

JW219

R211

C213

C212

C211

15

28

JW203

R220

JW204

JW210

JW216

JW206

JW214

JW205

JW215

JW213

JW209

JW208

JW207

R255

R202

R256

R206

C215

R205

R254

R204

R253

R203

C201

R252

R251

R

L

(CHASSIS)

R

L

R

L

R

L

(CHASSIS)

R

L

VIDEO 1 AUDIO IN

VIDEO 1 AUDIO OUT

VIDEO 2 AUDIO IN

VIDEO 2 AUDIO OUT

DVD AUDIO IN

J202

VIDEO

J201

G

STR-DB798

R308

CN301

MAIN BOARD

7

CN407

(Page 36)

R307

1-867-415-

11

(11)

TV/SAT IN

R

TV/SAT AUDIO IN

R219

R207

CN201

9

R208

MAIN BOARD

CN406

R201

1-867-416-

L

11

(11)

(Page 36)

2828

STR-DB798

6-16. SCHEMATIC DIAGRAM – VIDEO Section –

E304

C304

2200p

E302

C302

2200p

R301

C309

10 50V

C310

10 50V

C315

0.1

C313

10

50V

C303

10 50V

C306

50V

75

10

C301

47p

R302

75

C305

47p

R304

75

C307

47p

R306

75

R307

75

C308

2200p

E305

VIDEO

MONITOR

VIDEO OUT

VIDEO 1

VIDEO IN

VIDEO 1

VIDEO OUT

VIDEO 2

VIDEO IN

VIDEO 2

VIDEO OUT

DVD

VIDEO IN

TV/SAT

VIDEO IN

(CHASSIS)

J302

1P

J304

3P

J305

3P

• See page 53 for IC Block Diagrams.

JW301

R303

75

R305

75

C311

IC301

NJM-2595D

VIDEO SELECTOR

0.1

1SS133T

V3 GND

TUNER-R

TUNER-L

FUN-LAT

VIDEO-R

VIDEO-L

DATA

CN202

V3 R

V3 L

CN201

-15V

+15V

GND

G2

(CHASSIS)

3P

(Page 31)

10P

CLK

(Page 37)

C215

2200p

R1

R2

J202

CN301

10P

MONITOR OUT

V-MONITOR

VIDEO3

+5V

GND

-5V

V-SW1

V-SW2

V-SW3

V-SW4

D301

D302

(Page 38)

VIDEO

AUDIO IN

VIDEO 1

AUDIO OUT

VIDEO 2 IN

AUDIO IN

VIDEO 2

AUDIO OUT

AUDIO IN

VIDEO 1

DVD

TV/SAT

R

L

R

L

R

L

R

L

R

L

R

L

(CHASSIS)

6P

J201

6P

G1

2200p

R256

1k

O1

R206

1k

O2

O5

O7

O9

R255

2.2k

O3

0.01

R205

2.2k

O4

R254

1k

O5

R204

1k

O6

R253

2.2k

O7

R203

2.2k

O8

R252

1k

O9

R202

1k

O10

R251

1k

O11

R201

1k

O12

C201

0.022

C214

C212

0.022

C211

O11

D

R

D

2

T

V

BS

/L

EO

/D

VD

2 OU

ID

V

D

V

TV

S S

L

V

O6

O8

O10

O12

R1

O1

O3

1

T

M

U

EO

CO

ID

1 O

V

O2

O4

R5

R6

AT

3

L

M

EO

O

NC

C

ID V

ND G

R7

R2

C213

R3

100p

T A D

AUDIO

SELECTOR

CLK

IC201

TC9273N-014

R4

R207

33

R208

33

1k

R3

R220

1k

R4

R219

R211

1k

R5

R6

R7

STR-DB798

2929

Sony STRDB-798 Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

3-2. CASE

DISASSEMBLY

3-3. COMP-V BOARD

3-4. BACK PANEL BLOCK

3-5. DIGITAL BOARD, A/V SYNC BOARD

3-6. STAY-5/AU-IN/VIDEO-AU/VIDEO/S-VIDEO/SPK-A/SPK-B BOARD

3-7. MAIN BOARD BLOCK

3-8. MAIN BOARD

TEST MODE

ELECTRICAL ADJUSTMENTS

DIAGRAMS

6-1. BLOCK DIAGRAM – TUNER/VIDEO Section –

6-2. BLOCK DIAGRAM – AUDIO DSP Section –

6-3. BLOCK DIAGRAM – AUDIO CONTROL Section –

6-4. BLOCK DIAGRAM – AUDIO AMP Section –

6-5. BLOCK DIAGRAM – DISPLAY, KEY CONTROL Section –

6-6. BLOCK DIAGRAM – POWER SUPPLY Section –

6-7. PRINTED WIRING BOARD – DIGITAL BOARD (Component Side) –

6-8. PRINTED WIRING BOARD – DIGITAL BOARD (Conductor Side) –

6-9. SCHEMATIC DIAGRAM – DIGITAL BOARD (1/4) –

6-10. SCHEMATIC DIAGRAM – DIGITAL BOARD (2/4) –

6-11. SCHEMATIC DIAGRAM – DIGITAL BOARD (3/4) –

6-12. SCHEMATIC DIAGRAM – DIGITAL BOARD (4/4) –

6-13. PRINTED WIRING BOARD – A/V SYNC BOARD –

6-14. SCHEMATIC DIAGRAM – A/V SYNC BOARD –

6-16. SCHEMATIC DIAGRAM – VIDEO Section –