Sony STRDB-795 Service manual

STR-DB795

SERVICE MANUAL

Ver 1.0 2004.10

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.

AEP Model

UK Model

E Model

Australian Model

Amplifier section

POWER OUTPUT Models of area code AEP, UK, TW, KR, AUS Rated Power Output at Stereo Mode (8 ohms 1 kHz, THD 0.7%)

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

(8 ohms 1 kHz, THD 0.7%)

(8 ohms 1 kHz, THD 10%)

100 W + 100 W 90 W + 90 W

2)

FRONT CENTER SURR SURR BACK 90 W

FRONT CENTER SURR SURR BACK 100 W

FRONT CENTER SURR SURR BACK 110 W

2)

3)

1)

: 90 W + 90 W

1)

: 90 W

1)

: 90 W + 90 W

1)

: 90 W +

1)

: 100 W + 100 W

1)

: 100 W

1)

: 100 W + 100 W

1)

: 100 W +

1)

: 110 W + 110 W

1)

: 110 W

1)

: 110 W + 110 W

1)

: 110 W +

SPECIFICATIONS

Models of area code SP, MY Rated Power Output at Stereo Mode (8 ohms 1 kHz, THD 0.7%)

Reference Power Output (8 ohms 1 kHz, THD 0.7%)

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

AEP, UK, SP, MY, KR 230 V AC, 50 Hz AUS 240 V AC, 50 Hz TW 110 V AC, 60 Hz

90 W + 90 W

2)

FRONT CENTER SURR SURR BACK 90 W

2)

1)

: 90 W + 90 W

1)

: 90 W

1)

: 90 W + 90 W

1)

: 90 W +

3) Measured under the following conditions:

Area code Power requirements

KR 220 V AC, 50 Hz

Frequency response PHONO RIAA equalization curve

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

Inputs (Analog) PHONO Sensitivity: 2.5 mV

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

±0.5 dB 10 Hz − 100 kHz

+0.5/−2 dB (whe n ANALOG DIRECT is selected)

Impedance: 50 kilohms

3)

: 86 dB

S/N (A, 2.5 mV

Sensitivity: 150 mV Impedance: 50 kilohms S/N (A, 150 mV

– Continued on next page –

4)

: 96 dB

4)

)

5)

)

9-879-195-01

FM STEREO FM/AM PECEIVER

Sony Corporation

Audio Group Published by Sony Engineering Corporation

STR-DB795

4) INPUT SHORT.

5) Weighted network, input leve l.

Inputs (Digital) DVD (Coaxial) Impedance: 75 ohms

DVD, TV/SAT, MD, VIDEO3 (Optical)

Outputs MD/TAPE (REC OUT),

VIDEO 1, 2 (AUDIO OUT)

SUB WOOFER Voltage: 2 V

EQ Gain levels ±10 dB, 1 dB step

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

Voltage: 150 mV Impedance: 2.2 kiloh ms

Impedance: 1 kilohms

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

+0.5/−2 dB

AM tuner section

Tuning range Models of area code AEP, UK, SP, MY, TW, KR, AUS 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

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

Video section

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

C: 0.286 Vp-p, 75 ohms COMPONENT VIDEO: Y: 1 Vp-p, 75 ohms

B-Y: 0.7 Vp-p, 75 ohms

R-Y: 0.7 Vp-p, 75 ohms

80 MHz HD Pass Through

General

Power requirements

Area code Power requirements

AEP, UK 230 V AC, 50/60 Hz AUS 240 V AC, 50 Hz SP, MY 220−230 V AC, 50/60 Hz TW 110 V AC, 60 Hz KR 220−230 V AC, 50/60 Hz

Power consumption

Area code Power consumption

AEP, UK, SP, MY, KR, AUS 270 W TW 650 W

Power consumption (during standby mode)

0.3 W (when “POWER SAVE” in the CUSTOMIZE menu is set to “ON”)

Dimensions 430 × 161 × 400 mm

including projecting parts and controls

Mass (Approx.) 14.5 kg

Supplied accessories

FM wire antenna (1) AM loop antenna (1) Remote commander RM-PP413 (1) R6 (size-AA) batteries (2)

Design and specifications are subject to change without notice.

• Abbreviation AUS: Australian model KR : Korean model MY : Malaysia model SP : Singapore model TW : Taiwan model

2

r

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 CHECK-OUT

After correcting the original service problem, perform the following 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 A C 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 v oltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate lo w-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 2 V A C range are suitable. (See Fig. A)

STR-DB795

To Exposed Metal Parts on Set

AC

0.15 µF

1.5 k

Ω

Earth Ground

voltmete (0.75 V)

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

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 APPEAR AS SHO WN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

3

STR-DB795

SERVICING NOTES

STR-DB795

• MODEL IDENTIFICATION

– Back Panel –

PART No.

Model PART No.

AEP and UK models 4-050-932-0[] Singapore and Malaysia models 4-050-932-2[] Australian model 4-050-932-3[] Taiwan model 4-050-932-4[] Korean model 4-050-932-5[]

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.

5

STR-DB795

)

SERVICE POSITION

[Connecting the clip for GND]

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

AU-IN board (JW101

It is necessary to remove cord bushing from back panel.

clip

6

Main unit

H

X

Mm

.

>

-

VIDEO1 VIDEO2

RM SET UP

SYSTEM STANDBY

SLEEP

AV1 AV2

TV ?/1 AV ?/1

VIDEO3 DVD

TV/SAT

MD/TAPE SA-CD/CD

TUNER

PHONO AUX

MULTI CH SOURCE

SHIFT

TOP MENU/

GUIDE

AV MENU

MUTING

MASTER

VOL

DISPLAY

TV VOL TV CH

WIDE DIMMER

TV/

VIDEO

MAIN

MENU

RETURN/EXIT

D.TUNING DISC ALT

ANT

CLEAR

SEARCH MODE

2CH

A.F.D.

123

456

789

0/10 >10/11 12

MOVIE

SUBTITLE ENTER

MUSIC

AUDIO

ANGLE

JUMP/

TIME

PRESET/

CH/D.SKIP

TEST TONE

SB

DECODINGDIRECT

DUAL

MONO

x

?/1

P

O

v

V

bB

1

2

9

qa

5

3

4

6 7

8

q;

qs

qd

qf

qg

qh

qj

qk

w;

ws

wd

wf

wg

wa

wh

ql

ENTER

The tables below show the settings of each button.

Remote Button

Operations Function

A.F.D. wd Receiver Selects the decoding

mode for audio sound.

ALT 9 Remote When ALT button lights

up, it changes the remote key function to activate those buttons with orange printing.

ANGLE w;DVD player Selects viewing angle or

changes the angles.

ANT ql VCR Selects output signal

from the antenna terminal: TV signal or VCR program.

AUDIO waTV/VCR/

DVD player

Changes the sound to Multiplex, Bilingual or Multi channe l T V Sound.

AUX wf Receiver To listen to an audio

equipment.

AV MENU qj

VCR/ Satellite tuner/ DVD player

Displays menu .

AV1 and AV2 wh

Remote Selects the command

mode of the remote.

AV ?/1 1TV/VCR/

CD player/ VCD player/ LD player/ DVD player/ MD deck/ DAT deck

Turns the audio and video components on or off.

CLEAR qkCD player/

DVD player

Clears a mistake when you press the incorrect numeric buttons or returns to continuos playback etc.

DIMMER qfReceiver Adjusts the brightness of

the display.

DIRECT wsReceiver Selects 2CH ANALOG

DIRECT.

DISC q; CD player/

VCD player

Selects a disc directly (multi-disc changer only).

Remote Button

Operations Function

DISPLAY qgTV/VCR/

VCD player/ LD player/ DVD player

Selects informat ion displayed on the TV screen.

D.TUNING qkReceiver Enters direct tuning

mode.

DUAL MONO 6

Receiver Selects the language

you want during

digital broadcast. DVD 2 Receiver To watch DVD. ENTER 8 TV/VCR/

satellite tuner/ LD player/ MD deck/ DAT deck/ Tape deck

After selecting a

channel, disc or track

using the numeric

buttons, press to enter

the value.

ENTER qh Receiver/

VCR/ Satellite tuner/ DVD player

Enters the selectio n .

JUMP/TIME 7Satellite tuner Toggles betwe en the

previous and the

current chan nels.

CD player/ MD deck/ VCD player/ DVD player

Shows the time or

displays the playing

time of disc, etc.

MAIN MENU qd

Receiver Selects the menu of

the receiver . MASTER

VOL +/−

qs

Receiver Adjusts the master

volume of the

receiver. MD/TAPE wgReceiver To listen to Minidisc

or audio tape. MOVIE 4 Receiver Selects the pre-

programmed sound

fields for movie. MULTI CH 3Receiver Selects MULTI CH

IN source. MUSIC 5 Receiver Selects the pre-

programmed sound

fields for music. MUTING qa Receiver Mutes the sound from

the receiver .

Remote Commander (RM-PP413)

SECTION 2

GENERAL

STR-DB795

This section is extracted from instruction manual.

ALPHABETICAL ORDER

A.F.D. qg DIRECT q; DISPLAY 7 Display 5

INPUT MODE 8 INPUT SELECTOR qs

IR receptor 1 MAIN MENU 3 MASTER VOLUME −/+ 9

MEMORY/ENTER 4

2

1

MENU ws MOVIE qf MULTI CHANNEL DECODING

MULTI CH IN qa MUSIC qd

wawf wdws w; qk qj qh qg qf qd qs q;qaql

indicator 6

PHONES jack wd PRESET TUNING −/+ ql SPEAKERS (OFF/A/B/A+ B) wf SURR BACK DECODING qj

TUNING −/+ qk VIDEO 3 INPUT jacks wa

96534

8

7

NUMBERS AND SYMBOLS

2CH qh

−/+ w; ?/1 (power) 2

7

STR-DB795

tf td

ts ta

t; rl rk rj

rh

rg rf

rd

rs

ENTER

ra

r;

TV ?/1 AV ?/1

RM SET UP

SYSTEM STANDBY

VIDEO1 VIDEO2

AV1 AV2

MD/TAPE SA-CD/CD

TV/SAT

PHONO AUX

2CH

A.F.D.

123 TEST TONE

456

AUDIO

ANGLE

789

SUBTITLE ENTER

>

.

0/10 >10/11 12

SHIFT

D.TUNING DISC ALT

Mm

ANT

CLEAR

X

H

TOP MENU/

GUIDE

V

v

RETURN/EXIT

DISPLAY

TV VOL TV CH

?/1

P

SLEEP

VIDEO3 DVD

TUNER

MULTI CH SOURCE

MOVIE

MUSIC

DUAL

SB

MONO

DECODINGDIRECT

JUMP/

PRESET/

TIME

CH/D.SKIP

-

SEARCH MODE

x

MUTING

AV MENU

MASTER

VOL

bB

O

TV/

MAIN

VIDEO

MENU

WIDE DIMMER

Remote Button

PHONO rl R eceiver To listen to turntable .

wj

PRESET/

wk

CH/ D.SKIP +/− edTV/VCR/

wl e;

ea

Operations Function

Receiver Selects preset

satellite tuner CD player/

VCD player/ DVD player/ MD deck

RETURN/ EXIT ej

es

ed

RM SET UP tfRemote To set up the rem ote .

VCD player/ LD player/ DVD player

Satellite tuner Exits the menu.

ef

SA-CD/CD wlReceiver To listen to Super

eg eh

SB

Receiver Se lects the surround

DECODING

es

SEARCH

DVD player Selects searching

MODE q;

ej

SHIFT ql Receiver Selects a memory

ek

el

SLEEP wj Receiver Activa tes the sleep

SOURCE ea Remote Selects 2ND AV

SUBTITLE efDVD player Changes the subtitles.

SYSTEM STANDBY (Press AV

?/1 1 and ?/1 wj at

the same time)

TEST TONE rj

Receiver/ TV/VCR/ Satellite tuner/ CD player/ VCD player/ LD player/ DVD player/ MD deck/ DAT deck

Receiver Outputs test tone.

stations. Selects preset

channels. Skips discs (multi-

disc changer only).

Returns to the previous menu.

Audio CD or compac t disc.

back decoding modes.

mode. Press to select the unit for search (track, index, etc.)

page for presetting radio stations or tuning to preset stations.

function and the duration which the receiver turns off automatically.

output.

Turns off the receiver and other Sony audio/ video components.

Remote Button

Operations Function

TOP MENU/ DVD player Displays DVD title. GUIDE rs Sat e llite tuner Displays guide menu. TUNER e; Receiver To listen to radio

programs.

TV CH +/− r;TV Selects preset TV

channels.

TV/SAT t; Receiver To watch TV

programs or satellite receiver.

TV/VIDEO ekTV Selects input signa l:

TV input or video input.

TV VOL +/− ra

TV Adjusts the volume of

the TV.

TV ?/1 td TV Turns the TV on or

off.

VIDEO1 ta Receiver To watch VCR.

(VTR mode 3)

VIDEO2 ts Receiver To watch VCR.

(VTR mode 1)

VIDEO3 wk Receiver To watch VCR.

(VTR mode 2)

WIDE el TV Selects the wide

picture mode.

1-9 and 0/10 rh

Receiver Use with SHI FT to

preset radio station or tuning to preset stations and with D.TUNING for direct tuning.

CD player/ VCD player/ LD player/

Selects track numbers.

0/10 selects track 1 0. MD deck/ DAT deck

TV/VCR/ Satellite tuner

Selects channel

numbers.

2CH rk Receiver Selects 2CH

STEREO mode.

>10/11 ef CD player/

VCD player/

Selects track numbers

over 10. LD player/ MD deck

-/-- q; TV Selects the channel entry mode, eithe r one or two digit.

Remote Button

Operations Function

?/1 wj Receiver Turns the receiver on

or off.

./> rg ef

VCR/ CD player/

Skips tracks.

VCD player/ LD player/ DVD player/ MD deck/ DAT deck/ Tape deck

m/M rfCD player/

VCD player/ DVD player

Searches tracks in t he forward or backward

direction. LD player/ MD deck

VCR/ DAT deck/

Fastforwards or

rewinds. Tape deck

8

Remote Button

Operations Function

N rd VCR/

CD player/ VCD player/ LD player/ DVD player/ MD deck/ DAT deck/ Tape deck

X eg VCR/

CD player/ VCD player/ LD player/ DVD player/ MD deck/ DAT deck/ Tape deck

x eh VCR/

CD player/ VCD player/ LD player/ DVD player/ MD deck/ DAT deck/ Tape deck

Starts playback.

Pauses playback or recording. (Also starts recording with components in recording standby.)

Stops playback.

Remote Button

O ej VCD player/

Operations Function

Returns to the LD player/ DVD player

previous menu or

exits the menu.

V/v qh Receiver Selects a menu item. B/b qh Receiver Adjusts or changes

the setting.

V/v/B/b qh VCR/

Selects a menu item. Satellite tuner/ DVD player

Notes

Some functio ns explained in this section may not

work depending on the model.

The above explanation is intended to serve as an

example only. Therefore, depending on the component the above operation may not be possible or may operate differently than describ ed.

To activate the buttons with or an ge prin tin g, pre ss

ALT first before pressing the buttons.

The SOURCE button on the rem ote is not available

for receiver operation.

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

3-1. DISASSEMBLY FLOW

SET

3-2. CASE (414535)

(Page 10)

3-3. COMP-V BOARD

(Page 10)

3-4. BACK PANEL BLOCK

(Page 11)

STR-DB795

SECTION 3

DISASSEMBLY

3-5. MAIN BLOCK

(Page 11)

3-6. DIGITAL BOARD

(Page 12)

3-7. STAY 3/STAY 4/SP-B/SP-A/S-VIDEO/

VIDEO/VIDEO-AU/AU-IN BOARD (Page 12)

3-8. MAIN BOARD

(Page 13)

9

STR-DB795

s

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

3-2. CASE (414535)

3

two screws (flat head)

5

2

two screws (flat head)

1

two screws (BVTP3

6

×

8)

7

case (414535)

4

two screw (flat head)

3-3. COMP-V BOARD

3

2

connector (CNP352)

connector (CN351)

4

COMP-V board

1

two screws (BVTP3

×

8)

10

3-4. BACK PANEL BLOCK

)

7

connector (CN909)

6

connector (CN907)

5

connector (CN910)

4

two connectors (CN913, 1112)

3

connector (CN202)

qa

screw

2

connector (CN853)

1

connector (CN417)

9

two screws (BVTP3

×

8)

qs

main block

0

two screws (BVTP3

×

8)

8

wire (flat type) (CN1105)

2

connector (CN901)

1

connector (CN2)

3

connector (CN902)

5

two screws (BVTP3

qs

×

8)

6

two screws (BVTP3 × 8)

7

three screws (BVTP3 × 8)

8

screw (BVTP3

six screws (BVTP3 × 8)

9

five screws (BV3

×

8)

0

six screws (BVTP3

qa

eight screws (BVTP3

qd

back panel block

×

10)

STR-DB795

×

8

×

8)

3-5. MAIN BLOCK

4

wire (flat type) (CN1103)

11

STR-DB795

)

3-6. DIGITAL BOARD

3

connector (CN1107)

1

two connectors (CN1110, CN1111)

2

connector (CN1106)

5

DIGITAL board

4

two connectors (CN402, 403)

3-7. STAY 3/STAY 4/SP-B/SP-A/S-VIDEO/VIDEO/VIDEO-AU/AU-IN BOARD

6

STAY 4 board

0

SP-A board

qs

S-VIDEO board

qf

2

connector (CN447)

VIDEO board

3

STAY 3 board

1

connector (CN104)

qh

qg

4

8

SP-B board

7

two connectors (CN412, 413)

9

two connectors (CN410, 411)

5

connector (CN451)

connector (CN450)

qa

connector (CN408)

qd

connector (CN407)

VIDEO-AU board

connector (CN406)

qj

harness (CN132

qk

two connectors (CN404, 405)

ql

AU-IN board

12

3-8. MAIN BOARD

2

two connectors (CN2701, 2703)

4

A CLASS board

1

six connectors (CN421, 401, 601, 651, 501, 420)

3

connector (CN951)

5

connector (CN423)

6

connector (CN416)

7

connector (CN409)

STR-DB795

9

heatsink block

8

twelve screws (transistor)

0

MAIN board

13

STR-DB795

SECTION 4

TEST MODE

TUNER FACTORY PRESET MODE

All preset contents are reset to the default setting.

Procedure:

1. While pressing the [MUSIC] and [PRESET TUNING --] b uttons, 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 AM STEP CHANGE (9 kHz/10 kHz) MODE

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

Procedure:

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

2. Turn the [INPUT SELECTOR] dial to select the “AM”

3. Press the I/1 button to turn off the main power.

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

5. Either the message “9 K STEP” or “10 K STEP” appears. Select the desired step.

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 on the main power.

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

I/1 button to turn

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 but- ton to turn the main power.

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

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.

PRO TECTOR 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

2. The message “PROT EVER” appears.

I/1 button to turn on the main power.

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 I/1 button to turn on the main power.

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

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 .

14

BIAS ADJUSTMENT

STR-DB795

SECTION 5

ELECTRICAL ADJUSTMENTS

Condition:

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

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) on the MAIN board or CN732 on the SBL board.

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

3. Adjust the RV431 (RV481, RV531, RV581, RV631, RV681) on the MAIN board or RV731 on the SBL board so tha t 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) –

– SBL BOARD (Component Side) –

1

CN732

2

RV731

RV431

2 1

CN432

RV481

CN482

2 1

RV631

2 1

CN632

RV681

2 1

CN682

CN532

RV531 RV581

2 1

CN582

15

STR-DB795

MEMO

16

SECTION 6

DIAGRAMS

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

TU301

TUNER UNIT

ANTENNA

(Page 21)

COAXIAL

FM 75

A

AM

DATA, CLK

DATA CLK

FM

AM

3 1

VIDEO

ST-DI CLK

(AEP, UK)

VIDEO

J1092

VIDEO 3

INPUT

S-VIDEO

J850 (2/2)

S-VIDEO

TV/SAT IN

J850 (1/2)

S-VIDEO

DVD IN

J852 (1/2)

S-VIDEO

VIDEO 1 IN

ST-DO

CE

TUNED

STEREO

MUTE

VIDEO 3

INPUT VIDEO

TV/SAT IN

VIDEO 2 OUT

VIDEO 2 IN

VIDEO 1 OUT

VIDEO 1 IN

8L CH

10R CH

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

2 4 6 7

11

DVD IN

Y

C

Y

C

Y

C

Y

C

R-CH

J1091 (1/2)

J305

J304

SYSTEM CONTROLLER

IC1703 (1/6)

47 RDS.DATA

RDS_CLK

61

RDS_SIGNAL

135

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

V3

7

TV

3

LD

5

V2. OUT

11

V2. IN

9

V1. OUT

15

V1. IN

13

V3

7

V2. IN

9

TV

3

LD

5

13

V1. IN

V3

7

V2. IN

9

TV

3

LD

5

13

V1. IN

VIDEO SELECTOR

IC301

Y SWITCH

IC851

C SWITCH

IC850

STR-DB795

TUNER-L

J351 (1/2)

-1

-2

RELAY DRIVE

Q352

C SYNC BUFFER

Q370

Y SYNC BUFFER

Q371

RY352

RY354

VIDEO AMP

IC372

RELAY DRIVE

Q351

-1

-2

RY351

RY353

COMPONENT

99UP CON SDA

100UP CON SCL

SW1

114VIDEO_SW1

SW2

115VIDEO_SW2

SW3

116VIDEO_SW3

SW4

117VIDEO_SW4

SW4

SW1

SW2

SW3

SW4

6

SW3

4

SW2

10

SW1

14

M. OUT

1

SW5

OUT

SW2 SW3

SW1 SW4

OUT

SW5

OUT

SW2 SW3

SW1 SW4

OUT

SW5

D301

2

D302

V1.

15

10

4

14

6

M.

1

2

D851

V1.

15

10

4

14

6

M.

1

2

D850

VIDEO

TV/SAT IN

COMPONENT

VIDEO

DVD IN

VIDEO BUFFER

1

16

3.5795MHz (Taiwan, Korean models)

4.43MHz (EXCEPT Taiwan, Korean models)

PB/CB/B-Y

PR/CR/R-Y

PB/CB/B-Y

PR/CR/R-Y

Q372

CLOCK

GENERATOR

IC371

4

X370

Y

15 16

IC370

19

27

25

-1

7

VIDEO SYNC

7

SEPARATOR

J351(2/2)

Y

PB/CB/B-Y

PR/CR/R-Y

MONITOR OUT

Y

VIDEO 1 OUT

C

Y

MONITOR OUT

C

J302

VIDEO

J852 (2/2)

S-VIDEO

J851

S-VIDEO

(Page 19)

B

COMPONENT

VIDEO

MONITOR OUT

VIDEO

STR-DB795

SYNC SEPARATOR

1717

IC852

-2

RELAY DRIVE

Q850, 851

RY850

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

• SIGNAL PATH

: TUNER

: VIDEO

STR-DB795

6-2. BLOCK DIAGRAM – AUDIO DSP Section –

VIDEO

ANALOG

(Page 21)

TV/SAT IN

DVD IN

VIDEO 2 OUT

VIDEO 2 IN

VIDEO 1 OUT

VIDEO 1 IN

VIDEO 3

INPUT AUDIO

DATA, CLK, LAT

C

J201

L

J202

L

J1091 (2/2)

VIDEO SELECTOR

IC201

2

3

4

5

7

8

10

CONTROL

1415 16

CLK

DATA

LAT

S-RAM

D0 – D15 A0 – A15

7 – 10, 13 – 16,

29 – 32, 35 – 38

IC1202

5 – 1, 44 – 42,

27 – 24, 21 – 18

SOURCE-L

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

CS

WE

617

• SIGNAL PATH

: AUDIO (ANALOG)

D

(Page 19)

: AUDIO (DIGITAL)

108, 107, 105 – 102,

99, 98, 80 – 77,

75 – 72

12

BUFFER IC1402

LIN

1

SIGNAL-END

DEFERENTIAL

TIMING CONTROL RESET

MODULATOR

CLOCK/

/POWER CONTROL

RSTB

6

DIGITAL

CONVERTER

DOUT

SERIAL I/O

INTERFACE

LRCK

SYSCLK

A/D CONVERTER

IC1401

BCK

15

14

13

16

18 SDI1

17 BCKI1

29 BCKI2

15 LRCKI1 28 LRCKI2

59 EXLOCK

30 SDI2

GP8

69

KFSIO

22

D0 – D15

MCLK112MCLK2

9

X1201

13.9MHz

SIGNAL PROCESSOR

112, 110, 109,

97 – 92, 82 – 85,

AUDIO DIGITAL

IC1201

HDIN35HDOUT32HACN

33

66 – 64

A0 – A15

HCS34HCLK

36

4445

CSO

WEO

SDCLK

GP9

PM

68

XRST

113

2

37

SIGNAL

SELECTOR

IC1204

23SDO1 24SDO2 25SDO3 26SDO4

20BCKO 19LRCKO 67GP10

BST

56

5

6

1

2

SDO1 SDO2 SDO3 SDO4

BCKO

LRCKO

SDO1, SDO2,

SDO3, SDO4

BCKO,

LRCKO

E

F

(Page 19)

DIGITAL

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

DIGITAL OPTICAL

RECEIVER

IC1081

DIGITAL OPTICAL

RECEIVER

IC1104

DIGITAL OPTICAL

RECEIVER

IC1105

DIGITAL OPTICAL

RECEIVER

IC1106

J1101

DIGITAL OPTICAL

TRANSCEIVER

IC1107

DIGITAL SELECTOR

IC1103

IC1102

IC1151

3 7

4

5

6

AB

14 2

B

A

DIGITAL AUDIO INTERFACE RECEIVER

DIN0

3

DIN1

4

DIN2

5

DOUT

2

CKSEK1

47

CKSEL1

INPUT

CIRCUIT

MICON INTERFACE

DICECLK

36 38 37 35

DI

DEMODULATOR

CLKCEDO

IC1101

DATA

TIMING

CLOCK

104103

90

HDOUT

DSP_HACN

88

105

DSP GP9

107

GP12

106

PM

121

82

XRST

LRCK SW

DIR ERROR

ANALOG_DIGITAL

67

D1601

85

DSP_BST

EEPROM SDA

EEPROM SCL

58X057

X1601

16.5MHz

X1

MUTING SWITCH

Q1602

MUTING SWITCH

Q1601, 1603

SWITCHING

IC1503

EEPROM

IC1604

SDA

5112

6111

SCL

S MUTE

G

(Page 19)

SCLKO

H

(Page 19)

89

102

91 ADC:RST

A

69 OPT SEL2

B

70 OPT SEL1

CKSEL1

74 CKSEL1

DI

79 DI

CLK

75 CLK

CE

76 CE

DO

80 DO

XMODE

73 XMODE

DATAO

16

ERROR

LOCK

DETECT

DO

XMODE

CKOUT

XSTATE

48

XMODE

BCK

LRCK

XMCK

XOUT

XIN

AUDIO

34

14 15 13

17

20

21

22

24

X1101

12.288MHz

D1101

HDIN

HCLK

DSP_HCS

SYSTEM CONTROLLER

IC1703 (2/6)

DATA071XSTATE

72

STR-DB795

1818

6-3. BLOCK DIAGRAM – AUDIO CONTROL Section –

J101

FRONT

L

SURR

CENTER

SUB WOOFER

L

J151

L

J131

L

PHONO EQ AMP

IC131

ANALOG

MULTI CH IN

ANALOG

PHONO IN

MD/TAPE IN

MD/TAPE OUT

SA-CD/CD IN

9 5.1FL

12 5.1SL

28 5.1 C

15 5.1SW

2 PHONO

3 MD IN

4 MD OUT

5CD

FLOUT

STR-DB795

AUDIO SELECTOR

IC173

11

LINE AMP

IC110

BUFFER

+

IC171

26 25

27

23

CONTROL

1415 16

CLK

LAT

DATA

22

2117

19

VRIN

20

LEVEL SHIFT

CIRCUIT

DATA

16

DATA

CLK17LAT

13

CLK

LAT

OUT

TRIM

23

24

25

ELECTRICAL

VOLUME

BUFFER

IC401

IC402

FL

(Page 20)

J

(Page 17)

(Page 18)

B

D

E

F

H

G

TUNER-L

SOURCE-L

SDO1, SDO2, SDO3, SDO4

BCKO, LRCKO

SCLKO

S MUTE

SDO1 SDO3 SDO2

BCKO LRCKO

SDO4

BCKO LRCKO

DATA1

45

DATA2

46

DATA3

47

BCK

40

LRCK

41

SCKI

38

2 DATA

1 BCK 3 LRK

16 SCK

INTERFACE

SERIAL INPUT

MODE CONTROL

INTERFACE

MDI35MC36ML37RST33MDO

34

14MC13

MD

D/A

CONVERTER

IC1502

15

DIGITAL FILTER

MULT-FUNCTION

X8 OVER SAMPLING

ML

RST

MDO

ML

D/A

CONVERTER

7VO L

8VO R

MUTING

CONTROL

Q813

LPF

AMP

LPF

AMP

LPF

AMP

LPF

AMP

D/A CONVERTER

IC1501

MDI MCI

VOUT1

VOUT2

VOUT3

VOUT4

VOUT5

VOUT6

6 TUNER

7 A/D, V 8 2CH

R-CH

BUFFER

IC1521

BUFFER

IC1541 (1/2)

BUFFER

IC1541 (2/2)

BUFFER

IC1561

LINE AMP

IC1581 (2/2)

LINE AMP

IC1581 (1/2)

MUTING

Q401

MUTING

Q601

MUTING

Q751

MUTING

Q501

MUTING

Q701

MUTING

Q651

14

13

12

11

10

9

D/AFL

10

26 D/A C

17 D/ASW

13 D/ASL

AUDIO SELECTOR

IC101

24COUT

19SWOUT

14SLOUT

DATA21CLK23LAT

22

LINE AMP

IC111 (2/2)

LINE AMP

IC111 (1/2)

LINE AMP

IC112

VRIN

20

VRIN

9

LEVEL SHIFT

CIRCUIT

DATA

16

DATA

VRIN

20

LEVEL SHIFT

CIRCUIT

DATA

16

DATA

VRIN

20

VRIN

9

LEVEL SHIFT

CIRCUIT

DATA

16

CLK17LAT

13

CLK

CLK17LAT

13

CLK

CLK17LAT

13

LAT

OUT

TRIM

OUT

TRIM

OUT

TRIM

OUT

TRIM

OUT

TRIM

23

24

25

6

5

4

ELECTRICAL

VOLUME

23

24

25

ELECTRICAL

VOLUME

23

24

25

6

5

4

ELECTRICAL

VOLUME

BUFFER

IC602 (2/2)

BUFFER

IC602 (1/2)

IC601

BUFFER

IC502

IC501

BUFFER

IC652 (2/2)

BUFFER

IC652 (1/2)

IC651

RELAY DRIVE

Q826

RY807

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

• SIGNAL PATH

: TUNER

: AUDIO (ANALOG)

: AUDIO (DIGITAL)

J203

SBL

SB (R)

C

SL

(Page 20)

K

SUB WOOFER

(Page 20)

L

(Page 20)

M

(Page 20)

N

STR-DB795

SDO4

SDO2

MDO

108 DA1DO

MDI MCI

ML RST

93 DA1LAT 92 DAC_RST 95 DAC_MDI 94 DACCLK 96 DA2LAT 81 GROUP SW

SYSTEM CONTROLLER

IC1703 (3/6)

DATA

CLK

LAT

6CTR/SW RY

1

2

6

SELECTOR

IC1504

5

DATA

CLK

LAT

DATA, CLK, LAT

SW

Q

P

R

(Page 21)

(Page 20)

1919

STR-DB795

6-4. BLOCK DIAGRAM – AUDIO AMP Section –

(Page 19)

L

R

L

R

CENTER

L

R

L

R

J1086

PHONES

FRONT A

FRONT B

SURR BACK

SURR

SPEAKERS

IMPEDANCE

USE 4-16Ω

R-CH

RY806

RELAY

DRIVE

Q823

FL

J

PRE DRIVE

Q2001, 2003

BIAS

Q2004, 2005

BIAS

Q2006

RV431

BIAS

Q431, 434

BOOSTER

Q402

BOOSTER

Q403

D411

CURRENT

DETECT

Q432, 433

RELAY DRIVE

Q809

RY449

R-CH

TM699

+ –

– +

TM449 (1/2)

+

RY444

RELAY DRIVE

D611

C

K

SBL

M

SB (R)

N

SL

L

PRE DRIVE

Q2201, 2203

PRE DRIVE

Q2701, 2703

PRE DRIVE

Q2301, 2303

PRE DRIVE

Q2401, 2403

BIAS

Q2204, 2205

BIAS

Q2206

BIAS

Q2704, 2705

BIAS

Q2706

BIAS

Q2304, 2305

BIAS

Q2306

BIAS

Q2404, 2405

BIAS

Q2406

RV631

BIAS

RV731

BIAS

RV681

BIAS

RV531

BIAS

Q631, 634

BIAS

Q731, 734

BIAS

Q681, 684

BIAS

Q531, 534

BOOSTER

Q602

BOOSTER

Q603

BOOSTER

Q702

BOOSTER

Q703

BOOSTER

Q652

BOOSTER

Q653

BOOSTER

Q502

BOOSTER

Q503

+

D711

D661

D511

OVER VOLTAGE

DETECT

Q822

CURRENT

DETECT

Q632, 633

CURRENT

DETECT

Q732, 733

CURRENT

DETECT

Q682, 683

CURRENT

DETECT

Q532, 533

B+

AF POWER

PROTECTOR

Q802, 803,

Q805

RELAY DRIVE

Q807

RY549

Q808

RELAY DRIVE

Q811

R-CH

RY649

–1

–2

RY699

R-CH

–

– +

TM444

+ –

+

–

+

–

TM449 (2/2)

+ –

– +

STR-DB795

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

• SIGNAL PATH

: AUDIO (ANALOG)

SYSTEM CONTROLLER

IC1703(4/6)

LIMITTER.IN

HP DETECT

PROTECTOR

SURR.RY

SP.A.RY

H/P RY

SB.RY

134

41

5

3

2

4SP B RY

7

118

D818

D812D819D816

D820

SW

R

(Page 19)

2020

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

REMOTE CONTROL RECEIVER

IC1051

SYSTEM CONTROLLER

63 SIRCS

IC1703 (5/6)

STR-DB795

17+/–.JOG (4A) 16+/–.JOG (4B)

ROTARY

ENCODER

RV1051

MENU

(Page 17)

(Page 18)

(Page 19)

J2305

CONTROL A1 II

DATA, CLK

A

DATA, CLK, LAT

C

DATA, CLK, LAT

P

DATA, CLK, LAT

Q

DATA

CLK

LAT

DATA

CLK

LAT

8

LEVEL SHIFT

3

11

IC804

ROTARY

ENCODER

RV1052

ROTARY

ENCODER

RV1060

ROTARY

ENCODER

RV1061

–/+

MASTER

VOLUME

INPUT

SELECTOR

S1051 – 1054,

S1056, 1061,

S1062, 1065

S1041 – 1047

AD2

AD1

SP SW

19+/–.JOG (3A) 18+/–.JOG (3B)

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

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

133

132

S1057

SPEAKERS

20

S1050

D1603

I/O BUFFER

Q1607

CLK

DATA

9

10

2

1 13 12

86 CONTROL.A1.IN

87 CONTROL.A1.OUT

21 VOL IC/TUNER DATA

22 VOL IC/TUNER CLK

23 VOL LAT

I / 1

IC805

Q810

9

10

2

1 13 12

5

4

D+5V

120 FUNCTION.SW.LAT

62POWER.ON/OFF

FLUORESCENT INDICATOR TUBE DRIVER

IC1001

1LED1

2LED2

D1031

MULTI CHANNEL DECODING

LED DRIVE

Q1032

DIMMER

CONTROL SWITCH

Q1031

D+5V

8

3

LEVEL SHIFT

11

6

STR-DB795

F1

42 – 31

15FL DATA

LEVEL SHIFT

14FL CLK

113FL STB

IC1006

7 DIN 8 CLK 9 STB

GRID1 – GRID12

14 – 29

SEG1 – SEG16

F2

FL1603

FLUORESCENT

INDICATOR

TUBE

2121

STR-DB795

6-6. BLOCK DIAGRAM – POWER SUPPLY Section –

+5V

TUNER +10V

+3.3V

TUNER +3.3V

(AEP, UK)

A+5V

REGULATOR

IC1905

+5V

REGULATOR

Q824

+10V

REGULATOR

IC1902

+5V

REGULATOR

IC1403

BIAS

B–

BIAS

B+

LIMITER SWITCH

Q2602

LIMITER SWITCH

Q2601, 2603

+15V

REGULATOR

IC955

+24V (RY)

Malaysia models

B–

B+

Singapore

D903 – 906

RECT D914

RECT

EXCEPT

Singapore

Malaysia models

F905

F906

EXCEPT

Singapore

Malaysia models

S901

IMPEDANCE

SELECTOR

8Ω

4Ω

-1

-2

T901

MAIN POWER

TRANSFORMER

F1

SYSTEM CONTROLLER

IC1703 (6/6)

+15V

– 15V

–18V

+5V

V+5V

+3.3V

+2.5V

119LIMITTER,OUT

42D.POWER

43V.POWER

55RSTX

8SUB T

60STOP

D+3.3V

STBY +3.3V

REGULATOR

IC952

+3.3V/+2.5V REGULATOR

IC1901

+3.3V

REGULATOR

IC1903

RESET SIGNAL

GENERATOR

IC1602

B+ SWITCH

Q956, 957

B+ SWITCH

Q958, 959

+3.3V

REGULATOR

IC1904

D+5V

V–5V

THERMAL DETECT

Q960 – 962

– 15V

REGULATOR

IC954

–18V

REGULATOR

Q903

+5V

REGULATOR

IC953

–5V

REGULATOR

IC951

D909

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

F903

F904

T2

SUB POWER

TRANSFORMER

(AC IN)

RY1

RELAY DRIVE

Q51

STR-DB795

1PW RY

2222

STR-DB795

T

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 1/4 W or less unless otherwise 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 MΩ). 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 AUS: Australian model KR : Korean model MY : Malaysia model SP : Singapore model TW : Taiwan model

• Circuit Boards Location

PRI board

SEC (3) board

HP-V3 board

SEC (1) board

DC1 board

DISPLAY board

AC board

FUN board

4-8 board

STAY 4 board

COMP-V board

TUNER UNI

STAY 3 board

VOL board

DIRECT board

SP-B board

SP-A board

S-VIDEO board

VIDEO board

VIDEO-AU board

AU-IN boar

DIGITAL board

SBL board

MAIN board

DC2 board

A CLASS board

STR-DB795

2323

STR-DB795

6-7. PRINTED WIRING BOARD – DIGITAL Section (1/2) –

• See page 23 for Circuit Boards Location.

:Uses unleaded solder.

• Semiconductor Location

Ref. No. Location

D1001 I-2 D1101 G-3 D1601 J-11 D1603 E-10 D1604 I-13 D1905 D-9 D1906 D-9 D1907 D-8

IC1101 F-3 IC1102 K-2 IC1103 E-3 IC1201 G-6 IC1202 E-6 IC1204 H-8 IC1401 I-10 IC1402 J-10 IC1501 I-3 IC1502 I-4 IC1503 H-2 IC1504 H-4 IC1521 J-8 IC1541 J-7 IC1561 J-5 IC1581 J-4 IC1602 D-12 IC1604 H-9 IC1703 G-11

Q1601 J-12 Q1602 J-12 Q1603 J-12 Q1607 E-9

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

A

B

DIGITAL BOARD

C

R1127

D

R1120

E

R1105

F

G

H

I

R1123

C1154

R1154

J

R1118

K

(COMPONENT SIDE)

16 9

1

R1121

R1122

R1107

C1104

R1104

C1101

R1102

IC1503

4

FB1503

R1507

FB1101

R1509

R1508

D1001

C1124

R1109

C1115

1

4

C1114

R1119

IC1103

48 37

1

12

13 24

IC1101

FB1104

FB1105

R1112

D1101

135

R1550

C1117

8

IC1102

R1117

R1111

R1114

R1649

R1108

R1503

R1501

48 37

1

12

13 24

IC1501

R1540

R1570

8

R1113

R1110

36

R1101

25

X1101

R1124

R1100

R1437

C1110

C1109

FB1407

IC1504

R1502

R1560

R1594

C1152

36

25

R1520

R1530

1

4

1

8

5

8

5

IC1502

IC1581

R1584

(AEP, UK)

R1705

16

9

4

1

R1711

R1574

R1710

C1230

R1202

IC1202

R1216

R1217

R1215

R1212

R1214

R1213

120 91

1

R1221

R1222

IC1201

30

31 60

IC1561

5

8

4

1

5

8

IC1541

R1564

122

4423

90

A18

IC1204

C1233

58

41

R1204

5

8

61

4

1

IC1521

R1630

R1224

D1907

R1604

R1603

R1674

R1721

R1601

R1647

4

1

R1673

R1648

R1611

R1661

R1605

D1906

R1308

R1612

R1608

R1669

R1644

IC1604

R1616

R1609

D1905

R1672

Q1607

E

D1603

R1671

JR1688

R1643

R1694

R1645

85

14

C1410

C1401

FB1401

L1901

R1680

R1681

72 37

73

R1646

IC1703

R1684

108

109 144

R1620

IC1401

13

1

4

IC1402

FB1601

IC1602

R1642

15

34

R1639

R1679

R1678

C1612

R1665

R1664

36

1

R1634

(EXCEPT AEP, UK)

R1676

R1677

R1667

C1640

C1619

R1724

R1602

R1622

R1600

D1601

C1634

E

Q1602

C1618

R1683

R1629

R1625

C1670

12

124

8

R1690

5

R1722

R1696

R1638

R1637

R1658

R1656

R1693

R1692 R1651

R1650

R1698

R1652 R1714 R1715

R1699

R1623

C1601

E

R1624

R1633

R1641

E

R1723

R1657

R1653

Q1603

Q1601

FB1604

R1640

D1604

R1716

1-863-045-11(12)

STR-DB795

2424

6-8. PRINTED WIRING BOARD – DIGITAL Section (2/2) –

• See page 23 for Circuit Boards Location.

STR-DB795

:Uses unleaded solder.

A

B

C

D

E

F

G

H

J

K

I

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

ANTENNA

AM

COAXIAL

FM 75Ω

TU301

R1203

C1210

C1209

JR1121

C1564

TUNER UNIT

SUPPLIED WITH THE

ASSEMBLED BLOCK

CN1103

C1310

C1227

C1311

R1314

C1208

R1201

C1201

C1216

C1513

C1562

R1562

C1563

R1571

R1563

R1573

R1561

C1211

C1234

C1572

R1572

C1573

CN1101

C1212

C1235

R1226

C1574

(AEP, UK)

R1364

R1208

C1309

X1201

R1207

R1209

C1582

R1582

R1581

C1231

FB1203

C1583

C1221

R1505

FB1502

R1580

R1583

R1206

R1205

R1593

C1584C1544

JR1201

R1590

C1592

R1592

R1591

FB1202

C1506

C1508

C1593

FB1201

R1512

C1512

C1129

R1504

R1506

C1501

IC1903

13

C1909

FB1102

FB1501

C1113

C1131

C1108

C1105

C1502

C1509

C1510

C1511

C1507

C1594

R1151

C1112

C1111

C1106

C1505

D1501

C1514

C1503

IC1151

C1151

C1910

R1115

R1106

D1502

C1504

C1116

C1127

C1126

C1107

IC1105

C1102

IC1106

IC1107

C1119

85

14

EB1101

C1132

C1121

C1122

C1123

C1120

CN1109

R1116

R1156

C1153

IC1104

3

1

3

1

3

1

3

1

C1118

C1130

R1153

R1152

1-863-045-

(CHASSIS)

COAXIAL IN

(CHASSIS)

11

(12)

(Page 50)

(Page 38)

S-VIDEO

BOARD

CN1111

(Page 32)

COMP-V

BOARD

CNP352

(Page 34)

(Page 52)

(Page 48)

2

DC1 BOARD CN907

1

MAIN BOARD CN419

51

52

53

SEC (3) BOARD

CN57

3

DISPLAY

BOARD

CN1001

DIGITAL BOARD

CN1110

1

CN1111

5

3

CN1112

1

CN1105

R1701

FB1605

D1602

(CONDUCTOR SIDE)

CN1106

113 5

C1617

FB1603

R1704

R1703

R1712

R1713

C1605

R1636

C1624

C1632

R1695

R1675

CN1104

C1659

R1702

R1627

R1628

C1611

C1610

C1613

C1639

R1613

R1666

(FOR CHECK)

C1606

C1658

C1609

C1608

C1638

R1614

C1614

R1615

R1697

R1720

R1685

C1631

R1305

FB1602

R1654

C1602

R1635

C1674

C1626

R1691

CN1107

C1100

R1304

C1671

C1620

C1406

C1413

X1601

C1603

C1404

4

R1687

C1673

DC2 BOARD

CN952

(Page 50)

IC1904

3

C1912

R1668

C1633

R1682

R1621

C1416

C1407

R1431

C1415

R1434

1

C1911

CN1108

C1627

(AEP, UK)

C1672

C1676

R1626

R1401

R1402

C1411

C1405

R1422

C1414

R1432

R1424

C1412

C1675

R1719

R1717

C1403

C1408

R1421

R1718

C1906

C1905

1

R1659

R1660

C1635

C1312

R1610

C1409

C1402

C1417

13

C1418

IC1403

C1908

IC1901

5

42

JR1113

JR1112

(EXCEPT AEP, UK)

R1618

R1607

R1606

R1632

R1655

C1522

R1522

CN1102

R1521

R1617

R1619

C1524

R1524

C1523

JR1114

JR1211

R1631

R1523

C1532

R1532

R1531

R1533

C1533

C1534

C1914

R1534

JR1200

C1218

(AEP, UK)

IC1905

C1915

3

1

C1916

1

3

C1913

IC1902

C1213

R1210

C1219

C1552

R1552

R1551

R1553

C1554

JR1214

C1202

C1553

JR1210

R1219

R1218

R1554

C1214

R1220 C1103

C1207

C1206

C1205

C1204

C1203

C1220

C1542

R1542

R1541

C1543

R1543

R1544

IC1104

OPTICAL

DVD IN

IC1105

OPTICAL

TV/SAT IN

IC1106

OPTICAL

MD IN

IC1107

OPTICAL

MD OUT

SA-CD/CD

DVD

• Semiconductor Location

Ref. No. Location

D1501 H-12 D1502 H-12 D1602 J-2

IC1104 E-14 IC1105 F-14 IC1106 G-14 IC1107 H-14 IC1151 K-13 IC1403 J-6 IC1901 D-6 IC1902 D-8 IC1903 C-12 IC1904 C-5 IC1905 C-8

DIGITAL

J1101

L

STR-DB795

5

MAIN BOARD

CN403

(Page 38)

MAIN BOARD

6

CN402

(Page 38)

2525

STR-DB795

6-9. SCHEMATIC DIAGRAM – DIGITAL Section (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

J1101

(CHASSIS)

IC1104

TORX141L

IC1105

TORX141L

IC1106

TORX141L

IC1107

TOTX141L

CN1109

1P

CN1108

1P

EB1101

R1116

R1156

75

DIGITAL OPTICAL

RECEIVER

DIGITAL OPTICAL

RECEIVER

DIGITAL OPTICAL

RECEIVER

DIGITAL OPTICAL

TRANSCEIVER

C1118

0.001

C1130

0.1

C1132

0.1

C1151

22

50V

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

0.1

R1127

100

R1117

470

C1114

1p

GND

R1151

470

GND

• See page 54 for Waveforms. • See page 55 for IC Block Diagrams. • See page 62 for IC Pin Function Description.

A

XMODE

R1112

R1507

CKSEL1

DIGITAL AUDIO

INTERFACE RECEIVER

IC1101

LC89056W

4

5

0

1

B

B F

F

100

BCKI

LRCKI

R1437

0

100

0 1

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

IC1102

BUFFER

IC1151

BUFFER

C1115

C1154

0.1

47p

C1127

0.1

R1106 R1105

33k 4.7k

C1104

0.01

D1001

1SS352-TPH

FB1503

R1508 R1509

100 100

SCKI

C1107

C1113

0.1

C1111

0.1

C1102

47

16V

C1103

0.1

C1106

0.1

0.01 R1107

5.6k

R1104C1101

1000.1

C1108

0.1

C1105

47

16V

FB1101

TC7SH08FU

SCK

SWITCHING

IC1503

C1112 R1115

0.01 10k

CLK

12.288MHz

XMCK

CE

C1129

0.001

R1100 C1110

1M 18p

X1101

C1109

FB1501

C1505

0.1

FB1102

R1101

10k

R1110

R1113

1k

C1131R1124

100p100

R1111

1k

D1101

1SS352-TPH3

R1102

R1108

10k

100

18p

1k

XSTATE

LRCKI2

DI

DO

DATA0

GP8

DATA

BCKI2

KFSIO

X1

X2

X3

X4

X5

X6

Z1

Z2

Z3

Z4

(Page 29)

(Page 27)

STR-DB795

1 Y

2 Y

3 Y

(Page 28)

2626

STR-DB795

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

(2/4)

Z1

Z2

(Page 26)

Z3

Z4

C1231

0.1

C1212

470 10V

C1205

0.1

C1203

0.1 A1

A0

C1204

0.1 A8

A5

C1230

0.1 A6

A7

C1211

470 10V

R1222

R1221

220

D15

D14

JR1121

• See page 54 for Waveforms. • See page 62 for IC Pin Function Description.

0

D1

D2

D3

D4

D5

D6

D7

A15

A14

A13

A12

GP8

A3

A4

D0

A2

FB1201

FB1202

C1213 C1214

R1204C1218

1k100p

C1202

0.1

0.1 0.1

D5

D6

D7

WE

A15

A14

A13

A12

D10

D9

A8

D8

A9

A10

A11

D4

D11

D0

D1

D2

D3

D12

CS

S-RAM

IC1202

IS61LV6416-15T

D15

D14

D13

A5

A6

A7

A4

A3

A2

A1

A0

V1

V2

(Page 29)

C1206

C1207

C1209

R1203

C1210

C1208

JR1200

C1233

0

V3

SIGNAL SELECTOR

IC1204

TC7WH157FU

0.1

R1220

R1210

220

R1219

220

R1218

220

R1217

220

R1216

220

R1215

220

R1214

220

R1213

220

R1212

220

C1219

0.1

10k

XRST

AUDIO DIGITAL SIGNAL PROCESSOR

R1201

10k

R1226

C1235C1234

27p27p

X1201

13.9MHz

0

IC1201

CXD9718BQ

R1205

00

100

1

100 6

08

KFSIO

R120

DATA1

1207 R

DATA3

R12

DATA2

R1209

SD04

LRCKI2

BCKI2

FB1203

100

CK

LR

R1202

100

JR1201

0

DATA

WE

CS

C1201

0.1

R1224C1220

100100p

SDCLK

HCS

HDOUT

HCLK

HDIN

HACN

S

DSP

D13

0.1 D12

D11

D10

D9

D8

0.1 A9

A10

A11

0.1

C1216

100p

10k

0.1

PM1

STR-DB795

2

1

W

(Page 28)

2727

STR-DB795

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

TU301

TUNER UNIT

(SUPPLIED WITH THE ASSEMBLED BLOCK)

100

(AEP,UK)

R1401

C1417

R1705

-D S D R

R1711

-I S D R

C1221

0.1

1k

C1408

C1405

47 16V

470 16V

100

R1710

E

IG

T

S

U

M

F

0.1

C1309

LRCKI

BCKI

XMCK

470p

C1402

C1401

0.1

+5V REGULATOR

IC1403

7805

G

IC1402

M5218AFP-T

VCC

VEE

BUFFER

C1414 C1415

220p 220p

E T S

0.1

C1311

C1310

IO

R1434R1424

100k100k

(Page 26)

(Page 39)

(3/4)

R1364

0

R1314

0

Y2

Y1

Y3

C1409

47

16V

2.2k

R1402

FB1401

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

SBL

SL

SR

SW

C

SUBT

STOP

R1421

33k

L E C R U O S

• See page 54 for Waveform. • See page 55 for IC Block Diagrams.

COAXIAL FM 75Ω

ANTENNA

AM

CN1103

11P (EXCEPT AEP,UK)

15P

(AEP,UK)

O

I

N

T

D

K

T

L

A

U T

C1418

R1432R1422

R1431

0.1

C1227

0.1

33k33k

33k

S

L

A/D CONVERTER

IC1401

PCM1800

R E C R U O S

S

C

C1410

0.1

C1416

0.1

C1407

10 50V

C1406

4.7 50V

C1404

4.7 50V

C1403

10 50V

C1592

0.0018

22k

1.5k

R1592

R1591

180p

C1593

R1593

1k

C1594 C1584 C1574 C1564 C1554 C1544 C1534 C1524

100 25V

R1594

L B S

C1412C1413

0.10.1

(Page 27)

W1

W2

IC1905

2933

IO

G

C1915 C1914

47

+3.3V REGULATOR +10V REGULATOR

16V

R1504

10k

C1509

0.1

R1506

100

RST

CK

LR

DATA1

B T

DATA2

0.1

S

C1411

R

DATA3

FB1502

VEE

VCC

BUFFER

R1584 R1574 R1564 R1554 R1544 R1534 R1524

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

100k

SCKI

C1501

C1502

330

0.1

10V

R1502

100

R1503

100

R1501

100

C1572C1582

0.00180.0018

R1571

22k

1.5k

R1581

R1582

180p

C1583

R1583 R1573 R1563 R1553

1k 1k 1k 1k

100 25V

R B S

1.5k

22k

R1572

180p

C1573

100 25V

R S

C1916

(AEP,UK)

IC1902

M5F7810L

IO

G

C1913

0.1

U1

(Page 29)

U2

MC

C1522

0.0018

22k

1.5k

R1521

R1522

180p

C1523

100 25V

8.2k

R1530

8.2k

R1520

D1501

1SS367

C1507

D1502C1514

1SS3670.1

C1552

0.0018

22k

1.5k

R1552

R1551

180p

C1553

100 25V

W S

C1506

-T3

10

50V

VCC

0.1

C1510

0.1

SD04

DATA3

C1511

0.1

IC1541IC1581

M5218AFPM5218AFP

BUFFER

R1512

100

CK

LR

C1508

0.1

R1580R1590C1512

8.2k8.2k0.1

C1542

C1532

0.0018

22k

1.5k

R1541

R1542

R1532

180p

C1543

R1543 R1533 R1523

1k 1k 1k

100 25V

C

FRONTR

DATA SELECTOR

IC1504

TC7WH157FU

GRO

D/A CONVERTER

IC1502

PCM1748

IC1521

1.5k

R1531

180p

C1533

100 25V

M5218AFP

VEEVEE

VCC

BUFFER

R1505

C1513

SCK

100

DA2

MDI

10

50V

FRONTL

IC1561

M5218AFP

VCC

BUFFER

47

16V

I

C

L

O

D

M

D/A CONVERTER

IC1501

PCM1604

16V

8.2k

0.1

220

C1503

C1504

VEE

8.2k

R1570

R1560

R1550

R1540

C1562

0.0018

22k

1.5k

R1561

R1562

180p

C1563

100 25V

L S

0.1

STR-DB795

2828

STR-DB795

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

STR-DB795

(Page 33)

(Page 35)

(Page 27)

(Page 28)

V1

V2

V3

U1

U2

CN1111

5P

CTRL A1 GND

CTRL A1 SIGNAL

SCL

SDA

RESET

R1631

C1675

C1676

• See page 54 for Waveforms. • See page 62 for IC Pin Function Description.

(Page 26)

X2

X5

X4

D1907

C1627

50V

10

1SR154-400 TE-25

VINVOUT2

T1 U O

GND

VC

V

C1671

0.1

R1684

C1905

0.1

(EXCEPT AEP,UK)

UTE

MD2

C1635

R1666

0.1

10k

MD0

0.1

10k

C1620

R1635

SYSTEM CONTROLLER

IC1703

MB91154PFV-G-121

-BNDE1

R1720

FLCS

C1619

10k

C1605

0.1

STE

TUN

M

RDS-D

10K

JR1113

100

1k

R1636

10k

0.1

R1665

R1664

R1308

C1613

0.022

C1614

0.022

R1627

1k

10k

R1628

R1623

10k

R1691

10k

AD2

PRO

DET

AD1

LAT

STDO

A

B

DATA0

0.1 XSTATE

1k

R1680

100

R1639

R1648

1k

R1679

SW1

R1674

1k

R1678

SW2

1k

R1673

1k

R1677

SW3

C1624

10k

1k

R1654

R1601

R1649

R1681

3.3k

100k

R1626

R1682

FLASH1

FLASH2

1k

R1676

SW4

SIRCS

100

R1658

1k

R1690

POWER

1k

R1667

LIMT

(EXCEPT AEP,UK)

RDS-I

JR1112

X1601

16.5MHz

1k

R1685

FUN

10K

10k

R1687

FMSIG

RESET

(AEP,UK)

R1697

C1631

*

C1632

C1633

ER

DPOW

VPOW

100

R1637

R1633

(EXCEPT AEP,UK)

0.1

0.01

D1601 ISS352

HP SW

10k

R1656

R1304

R1305

R1657

R1634

JR1114

RESET

R1625

R1624

10k

RESET SIGNAL

GENERATOR

IC1602

S-80929CNMC-

G8ZT2G

R1642

C1612

*

R1697

0

(AEP,UK)

2.2k

(SP,MY)

4.7k

(AUS)

47k

(TW,KR)

C1674

0.1

10k

Q1602

2SC2712-YG

47k

10k

47k0.1

C1673

0.1

10K

R1655

10k

SMUTE

CD NC

10k

0.1

C1603C1634

0.10.1

R1723

47k

C1659

0.01

C1611

Q1601,1602

MUTING

SWITCH

(4/4)

+2.6V/+3.3V

REGULATOR

IC1901

SI-3004KWF

C1906

470 16V

D1905

1SR154-400 TE-25

C1908

470 16V

D1906

1SR154-400 TE-25

D1603 R1668

ISS352 5.6k

1k

R1724

R1722

XMODE

CKSEL1

CLK

CE

DI

DO

C1312

GRO

S

DSP

HCS

HACN

RSTB

RST

ML

MC

MDI

DA2

HDOUT

HDIN

HCLK

SDCLK

XRST

PM1

MDO

0.1

10k

0.1

R1672

10

R1661

10k

Q1607

2SC2712-YG

I/O BUFFER

R1643

R1694

R1644

R1645

R1646

R1647

R1721

R1630

R1621

R1603

R1719 R1718

10k 10k

R1604

R1605

R1620

R1608

R1611

R1609

R1612

R1616

R1617

R1618

R1619

R1632

R1606

R1607

R1610

R1671

10k

1k

R1669

4.7k

1k

100

1k

100

1k

R1660

10k

R1659

100

1k

C1672

0.1

EEPROM

IC1604

CAT24WC16WI-TE13

X3

C1617

0.01

+3.3V REGULATOR

IC1903

VCC

VSS

OUT

C1910

220 16V

L1901

0

+3.3V REGULATOR

IC1904

IGO

C1911

0.1

0.01

C1658

C1609

C1608

R1615

R1614

R1613

R1696

R1693

R1692

R1651

R1650

R1640

R1641

R1653

R1652

R1714

R1715

R1698

R1638

R1629

R1699

R1602

R1622

R1600

0.01

C1610

C1639

C1638

C1670 C1601C1626C1602

C1640

220p

RT1N141C-T ISS352

2933

IGO

C1909

0.1

JR1688

2933

1k

10k

100

10k

2.2k

0.1 0.10.10.1

Q1601 D1602

STOP

0

FB1601

C1912

470 16V

FUNC

CLK

MENU+

MENU-

FLDATA

FUNC+

FUNC-

FLCLK

SURRY

SPBRY

SPSW

VOL+

VOL-

STDI

SUBT

SBRY

SWRY

FRRY

HPRY

PWRY

R1683

R1695

+

R1675

R1702

R1701

R1704

R1703

R1712

R1713

FB1602

C1606

47 16V

C1618

0.1

10k

D1604

ISS352

R1716

10k

Q1603

2SC2712-YG

MUTING

SWITCH

R1717

X1

X6

CN1106

5P

+5V.D(+8V)

+5V.FL

D.GND

FB1603

FB1604

FB1605

D-POWER

V-POWER

OPT GND

DISP GND

FL DATA

FUNC-(STBY)

FUNC-LAT

FUN LAT SW

S-MUTE

LIMITER

PROTECTOR

SP-B-RY

MENU +

MENU -

V3 OPT

FL CLK

FLASH2

+5V(D)

SUR-RY

DETECT

AC 6V

POWER

SIRCS

+3.3V

SP SW

-/+ +

-/+ -

HP SW

FUNC+

FLASH1

V-SW4

V-SW3

V-SW2

V-SW1

SW-RY

HP-RY

CN1110

-28V

CN1107

CN1112

CN1105

+3.3V

FL CS

VOL+

VOL-

CN1104

RESET

CN1102

DATA

SB-RY

FR-RY

(Page 51) (Page 51)

3P

+8V

NC

2P

(Page 40)

3P

GND

(Page 53)

31P

GND

-28V

(Page 49)

+5V

AD2

AD1

7P

MD2

MD0

GND

VDD

(FOR CHECK)

20P

GND

CLK

(Page 39)

DPOWER

VPOWER

C1100

0.22

POWER

SIRCS

SPSW

+

-

MENU+

MENU-

HP SW

FLDATA

FLCLK

FLCS

VOL+

VOL-

FUNC+

FUNC-

AD2

AD1

MD2

MD0

RESET

FLASH2

FLASH1

STDI

CLK

FUNC

FUN

SMUTE

SW4

SW3

SW2

SW1

LIMT

10k

PRO

SBRY

SWRY

SURRY

SPBRY

FRRY

HPRY

DET

2929

STR-DB795

6-13. PRINTED WIRING BOARDS – VIDEO Section –

1 2 3 4 5 6 7 8

A

VIDEO BOARD

C302

R302

B

C

D

JW305

JW309

JW307

C311

16

9

JW301

JW306

IC301

1

JW304

8

C315

JW302

JW303

C313

D301

D302

C304

C305

R303

JW308

C303

C306

R304

C307

R305

C308

C309

R306

C310

• See page 23 for Circuit Boards Location.

C301

J302

MONITOR OUT

R301

(CHASSIS)

VIDEO 1 IN

(CHASSIS)

VIDEO 1 OUT

VIDEO 2 IN

VIDEO 2 OUT

(CHASSIS)

DVD IN

TV/SAT IN

R307

J304

J305

:Uses unleaded solder.

8

HP-V3

BOARD

CN1091

(Page 32)

VIDEO

VIDEO-AU BOARD

3

1

CN202

JW218

14

IC201

1

C214

JW219

JW220

JW201

R211

C213

15

28

JW203

R207

JW217

C212

C211

JW204

JW216

JW210

JW206

JW214

JW205

R208

JW215

JW208

JW213

JW209

JW207

R256

R206

C215

R205

R254

C201

R252

R251

R201

R255

R202

R204

R253

R203

R

L

(CHASSIS)

R

L

R

L

R

L

(CHASSIS)

R

L

R

L

VIDEO 1 IN

VIDEO 1 OUT

VIDEO 2 IN

VIDEO 2 OUT

DVD IN

TV/SAT IN

J202

VIDEO

AUDIO

J201

E

STR-DB795

CN301

MAIN BOARD

CN407

(Page 38)

1-688-645-

11

(15)

CN201

97

1-688-647-

MAIN BOARD

CN406

11

(15)

(Page 38)

3030

Sony STRDB-795 Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

3-2. CASE (414535)

3-3. COMP-V BOARD

3-4. BACK PANEL BLOCK

3-5. MAIN BLOCK

3-6. DIGITAL BOARD

3-7. STAY 3/STAY 4/SP-B/SP-A/S-VIDEO/VIDEO/VIDEO-AU/AU-IN BOARD

3-8. MAIN BOARD

TEST MODE

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 Section (1/2) –

6-8. PRINTED WIRING BOARD – DIGITAL Section (2/2) –

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

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

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

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

6-13. PRINTED WIRING BOARDS – VIDEO Section –