Sony Str-k680 Service Manual

SERVICE MANUAL

Sony Corporation

Home Audio Division Published by Sony Techno Create Corporation

AEP Model

UK Model

STR-K780

E Model

STR-K680/K780

Australian Model

STR-K780

MULTI CHANNEL AV RECEIVER

9-887-140-04

Ver. 1.3 2006.08

SPECIFICATIONS

STR-K680/K780

• STR-K680 is the tuner and the amplifier section in HT-DDW680, STR-K780 is the tuner and the amplifier section in HT-DDW780/HTP-36DW.

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.

— Continued on next page —

Photo : STR-K780

Amplifier section

Power Output

1)

Models of area code SP, SP6 (6 ohms 1 kHz, THD 0.7%) FRONT

2)

: 70 W/ch

CENTER

2)

: 70W

SUR

2)

: 70 W/ch (6 ohms 1 kHz, THD 10%) FRONT

2)

: 100 W/ch

CENTER

2)

:100 W

SUR

2)

: 100 W/ch

Models of area code AEP, UK, RU (6 ohms 1 kHz, THD 0.7%) FRONT

2)

: 85 W/ch CENTER

2)

: 85 W SUR

2)

8:5 W

/c

h

(6 ohms 1 kHz, THD 10%) FRONT

2)

: 122 W/ch

CENTER

2)

: 122 W SUR

2)

: 122 W/c h

Models of area code AUS (6 ohms 120 Hz–20 kHz, THD 0.09%) FRONT

2)

: 50 W/ch

CENTER

2)

: 50 W

SUR

2)

: 50 W/ch (6 ohms 1 kHz, THD 0.7%) FRONT

2)

: 85 W/ch CENTER

2)

: 85 W SUR

2)

: 85 W/ch (6 ohms 1 kHz, THD 10%) FRONT

2)

: 122W/ch

CENTER

2)

: 12 2 W SUR

2)

: 122W/ch

1)

Measured under the following conditions:

2)

Depending on the sound field settings and the source, there may be no sound output.

Area code Power requirements

SP, SP6, AEP, UK, RU 230 V AC, 50 Hz

AR 230 V AC, 50 Hz

Models of area code E51, MX Power Output

1)

(6 ohms 1 kHz, THD 0.7%) FRONT

2)

: 70 W/ch CENTER

2)

: 70 W SUR

2)

: 70 W/ch (6 ohms 100 Hz, THD 0.7%) SUB WOOFER

2)

: 70 W (6 ohms 1 kHz, THD 10%) FRONT

2)

: 100 W/ch

CENTER

2)

: 100 W

SUR

2)

: 100 W/ch (6 ohms 100 Hz, THD 10%) SUB WOOFER

2)

: 10 0 W

E51, AUS 240 V AC, 50 Hz

MX 127 V AC, 60 Hz

Models of area code AR Power Output

1)3)

(6 ohms 1 kHz, THD 0.7%) FRONT

2)

: W/ch1), 65 W/ch

3)

CENTER2): W1), 65 W

3)

SUR2): W/ch1), 65 W/ch

3)

(6 ohms 100 Hz, THD 0.7%) SUB WOOFER

2)

: W1), 65 W

3)

(6 ohms 1 kHz, THD 10%) FRONT

2)

: 100

100 100

100

W/ch

1)

, 90 W/ch

3)

CENTER2): W

1)

, 90 W

3)

SUR2):W/ch1), 90 W/ch

3)

(6 ohms 100 Hz, THD 10%) SUB WOOFER

2)

:W

1)

, 90 W

3)

Measured under the following conditions:

Area code Power requirements

AR 220 V AC, 50 Hz

70 70 70

70

2

STR-K680/K780

About area codes

The area code of the receiver you purchased is shown on the lower right portion of the rear panel (see the illustration below).

Any differences in operation, according to the area code, are clearly indicated in the text, for example, “Models of area code AA only”.

CENTER FRONT

LR

+ +

Area code

MODEL IDENTIFICATION – Rear Panel –

Parts No.

Reproduction frequency range:

28 – 20,000 Hz

Tone

FM tuner section

Tuning range 87.5 - 108.0 MHz Antenna FM wire antenna Antenna terminals 75 ohms, unbalan ced Intermediate Frequency

10.7 MHz

AM tuner section

Tuning range Models of area code AEP, UK, RU,

SP, SP6, AUS

With 9-kHz tuning scale:

531 - 1,602 kHz Antenna Loop antenna Intermediate Frequency

450 kHz

Video section

Inputs/Outputs

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

Y: 1 Vp-p, 75 ohms P

B/CB

/B-Y: 0.7 Vp-p,

75 ohms P

R/CR

/R-Y: 0.7 Vp-p,

75 ohms 80 MHz HD Pass Through

(only K780)

Gain levels ±6 dB, 1 dB step

Models of area code E51 With 10-kHz tuning scale: 530 – 1,610 kHz

4)

With 9-kHz tuning scale: 531 – 1,602 kHz

4)

Models of are code AR, MX With 10-kHz tuning scale: 530 – 1,610 kHz

4)

You can change the AM tuning scale to 9 kHz or 10 kHz. After tuning in any AM station, turn off the receiver. While holding down TUNING +, press ?/1. All preset stations will be erased when you change the tuning scale. To reset the scale to 10 kHz (or 9 kHz), repeat the procedure.

General

Power requirements

Power consumption

Power consumption (du ri ng standby mode)

0.2 W

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

430 × 145 × 300 mm including projecting parts

and controls

Mass (Approx.) 7.5 kg

Design and specifications are subject to change without notice.

Area code Power requirements

AEP, UK, RU 230 V AC, 50/60 Hz AUS 240 V AC, 50 Hz SP, SP6 230 – 240 V AC, 50/60 Hz

Area code Power consumption

AEP, UK, AUS, 190 W E51, MX, RU, AR

E51120/220/240 V AC,

50/60 Hz

MARX1

220-230V AC, 50/60 Hz

27 V AC, 60 Hz

SP, SP6

170 W

(K780)

7.8 kg

(K680)

Inputs (Analog)

Inputs (Digital)

Outputs (Analog)

SA-CD/CD, VIDEO 1, 2, DVD

Sensitivity: 800 mV Impedance: 50 kohms

DVD (Coaxial) Sensitivity: –

Impedance: 75 ohms

VIDEO 1

(VIDEO 1 is only K780)

(only K780)

, 2

(Optical)

Sensitivity: – Impedance: –

SUB WOOFER Voltage: 2 V

Impedance: 1 kohm

•Abbreviation AR : Argentina model AUS: Australian model E51 : Chilean and Peruvian models MX : Mexican model RU : Russian model SP : Singapore model SP6 : Singapore and Malaysia models

Ver. 1.2

Model Part No.

E51 model 2-661-458-2[] AR model 2-661-458-3[] MX model 2-661-458-4[] AEP, UK, RU models 2-662-452-0[] SP, SP6 models 2-662-452-1[] AUS model 2-662-452-2[]

3

STR-K680/K780

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.

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.

TABLE OF CONTENTS

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

2. TEST MODE ............................................................... 11

3. DIAGRAMS

3-1. Block Diagram – MAIN Section –.................................. 14

3-2. Block Diagram – DISPLAY/POWER Section – ............. 15

3-3. Printed Wiring Board – DIGITAL Board (Side A) –...... 16

3-4. Printed Wiring Board – DIGITAL Board (Side B) –...... 17

3-5. Schematic Diagram – DIGITAL Board (1/3) – .............. 18

3-6. Schematic Diagram – DIGITAL Board (2/3) – .............. 19

3-7. Schematic Diagram – DIGITAL Board (3/3) – .............. 20

3-8. Printed Wiring Board – MAIN Board – ......................... 21

3-9. Schematic Diagram – MAIN Board (1/3) – ................... 22

3-10. Schematic Diagram – MAIN Board (2/3),

HEADPHONE Board –................................................... 23

3-11. Schematic Diagram – MAIN Board (3/3),

AC SELECT Board, ADCC Board,

STANDBY Board – ......................................................... 24

3-12. Printed Wiring Boards

– ADCC Board, HEADPHONE Board – ........................ 25

3-13. Printed Wiring Boards

– STANDBY Board, AC SELECT Board – .................... 26

3-14. Printed Wiring Board – DISPLAY Board – ................... 27

3-15. Printed Wiring Boards

– TUNING Board, POWER Board – .............................. 28

3-16. Schematic Diagram – DISPLAY Board,

TUNING Board, POWER Board – ................................. 29

3-17. Printed Wiring Board – VIDEO Board –........................ 30

3-18. Schematic Diagram – VIDEO Board – .......................... 31

4. EXPLODED VIEWS

4-1. Front Panel Section ......................................................... 39

4-2. Chassis Section................................................................ 40

5. ELECTRICAL PARTS LIST .................................. 41

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.

4

STR-K680/K780

SECTION 1

GENERAL

This section is extracted from instruction manual.

Front panel

Receiver

AUTO CAL MIC

PHONES

MEMORY

FM MODE TUNING

+

PRESET TUNING

VIDEO 1 VIDEO 2 DVD SA-CD/CD FM AM

AMP MENU ENTER MASTER

VOLUME

INPUT MODE

+

DISPLAY DIMMER

2CH A.F.D. MOVIE MUSIC

?/1

1 2 34 6 7 8

9

5

qjqkqlw; qgqh qf qaq;qsqd

Name Function

A ?/1 Press to turn the receiver

on or off.

B DISPLAY Press to select informatio n

displayed on the display.

C DIMMER Press to adjust the

brightness of the display.

D Remote sensor Receives signals from

remote commander.

E Display The current st atus of the

selected component or a list of selectable items appears here.

F 2CH Press to select 2CH

STEREO mode.

G A.F.D. Press to select A.F .D. mode.

Name Function

H MOVIE,

MUSIC

Press to select sound fields (MOVIE, MUSIC).

I MASTER

VOLUME

Turn to ad just the volume level of all speakers at the same time.

J ENTER Press to store a station or

enter the selection when selecting the settin g s.

K INPUT MODE Press to select the input

mode when the same components are connected to both digital and analog jacks.

L I/i/U/u After pressing AMP

MENU (M), press I or i and U or u to se lect the settings.

M AM P ME NU Press to display the menu

of the receiver.

N Input buttons Press one of the buttons to

select the com ponent you want to use.

O PRESET

TUNING +/–

Press to select a pres et station.

P TUNING +/– Press to scan a station. Q MEMORY Press to store a station. R FM MODE Press to select FM

monaural or stereo reception.

S PHONES jack Connects to a head phone. T AUTO CAL MIC

jack

Connects to the supplied ECM-AC2 optimizer microphone for the A u t o Calibration function.

5

STR-K680/K780

About the indicators on the display

MEMORY

L C R

SLSSR

SW

LFE

SP

RDS

STEREO MONOD.RANGE

SLEEP OPT COAX

DIGITAL

;

DTS

;

PRO LOGIC II

q; 9qd

qf

qaqs

214356 7

8

Name Function

A SW Lights up when audio signal is

output fr om the SUB WOOFER jack.

B LFE Lights up when the disc being

played back contains an LFE (Low Frequency Effect) channel and the LFE channel signal is actually being reproduced.

C SP Lights up when the receiv e r is

turned on. This indicator does not light up if a headphone is connected to the PHONES jack.

D ;DIGITAL Lights up when Dolby Digital

signals are input.

Note

When playing a Dolby Digital format disc, be sure that you have made digital connections and that INPUT MODE is not set to “ANALOG”.

E ; PRO

LOGIC (II)

“; PRO LOGIC” lights up when the receiv er applies Pro Logic proces s ing to 2 channel signals in order to output the center and surround channel signals. “; PRO LOGIC II” lights up when the Pro Logic II Movie/Music decoder is activated.

Note

Dolby Pro Logic and D olby Pro Logic II decoding do not function for DTS format signals.

Name Function

F DTS Lights up when DTS signals are

input.

Note

When playing a D T S format disc, be sure that you have made digital connections and that INPUT MODE is not set to “ANALOG”.

G MEMORY Lights up when a memory

function, such as Name Input, Preset Memory, et c., is

activated.

H Preset

station indicators

Lights up when using the receiver to tune in radio stations you have preset. For details on presetting radio stations.

I Tuner

indicators

Lights up when using the receiver to tune in radio stations,

etc.

Note

“RDS” appears for mo de ls of area code AEP, UK only.

J D.RANGE Lights up when dynamic range

compression is activated.

K COAX Lights up when INPUT MODE

is set to “ A UTO” and the source signal is a di git al signal being input through the COAXIAL jack, or when INPUT MODE is set to “COAX IN”.

L OPT Lights up when INPUT MODE

is set to “ A UTO” and the source signal is a di git al signal being input through the OPTICAL jack, or when INPUT MODE is set to “OPT IN”.

M SLEEP Lights up when the Sleep Timer

function is activated.

N Playback

channel indicators

L R C SL SR S

The letters (L, C, R, etc.) indicate the channels being played back. The boxes around the letters vary to show how the receiver downmixes the source sound. Front Left Front Right Center (monaural) Surround Left Surround Right Surround (monaural or the surround components obta in ed by Pro Logic processing)

Example:

Recording format (Front/ Surround): Dolby Digital 3/2.1 Sound Field: A.F.D. AUTO

L C R

SL SR

SW LFE

6

STR-K680/K780

Rear STR-K780 model

panel

*You can watch the selected in put image when you

connect the MONI TOR OUT jack to a TV monito r.

3

56

2

41

DVD IN

DIGITAL

OPTICAL

VIDEO 2

IN

VIDEO 1

IN

COAXIAL

SA-CD/CD

AUDIO IN

DVD

AUDIO IN

VIDEO 2

AUDIO IN

VIDEO IN VIDEO IN

AM

ANTENNA

SURROUND

SPEAKERS

LR

+ +

CENTER FRONT

LR

+ +

R

L

R

L

R

L

AUDIO

OUT

VIDEO 1

AUDIO IN

VIDEO IN

VIDEO OUT

SUB

WOOFER

MONITOR

COMPONENT VIDEO

DVDINVIDEO 2INMONITOR

OUT

Y

P

B/CB

/B–Y

P

R/CR

/R–Y

A DIGITAL INPUT section

OPTICAL IN jack

Connects to a DVD player, etc. The COAXIAL ja ck provides a better quality of loud sound.

COAXIAL IN jack

B ANTENNA section

FM ANTENNA

Connects to the FM wire antenna supplied with this receiver.

AM ANTENNA

Connects to the AM loop antenna supplied with this receiver.

C VIDEO/AUDIO INPUT/OUTPUT

section

AUDIO IN/ OUT jack

Connects the video and audio jacks of a VCR or a DVD player.

VIDEO IN/ OUT jack*

White (L)

Red (R)

Yellow

D COMPONENT VIDEO INPUT/

OUTPUT section

COMPONENT VIDEO INPUT/ OUTPUT jack*

Connects to a DVD player, TV, or a satellite tuner. You can enjoy high quality image.

E SPEAKER section

Connects to the speakers.

Connects to the sub woofer.

F AUDIO INPUT section

AUDIO IN jack

Connects to a CD player, etc.

Green

Blue

Red

White (L)

Red (R)

7

STR-K680/K780

Rear pan STR-K680 model

el

SUB

WOOFER SURROUND

DVD IN

SPEAKERS

SA-CD/CD

AUDIO IN

DVD

AUDIO IN

VIDEO 2

AUDIO IN

VIDEO 1

AUDIO IN

LR

+ +

DIGITAL

OPTICAL

VIDEO 2

IN

COAXIAL

AM

ANTENNA

CENTER FRONT

LR

+ +

R

L

R

1

3 42

A DIGITAL INPUT section

OPTICAL IN jack

Connects to a DVD player, etc. The COAXIAL jack provides a better quality of loud sound.

COAXIAL IN jack

B ANTENNA section

FM ANTENNA

Connects to the FM wire antenna supplied with this receiver.

AM ANTENNA

Connects to the AM loop antenna supplied with this receiver.

C AUDIO INPUT section

AUDIO IN jack

Connects to a CD player, etc.

D SPEAKER section

Connects to the speakers and sub woofer.

White (L)

Red (R)

8

STR-K680/K780

You can use the supplied remote RM-AAU006 to operate the receiver and to control the Sony audio/video components that the remote is assigned to operate.

Remote commander

123 46 78

0/10

ENTER

9

SYSTEM STANDBY

TV/VIDEO

SLEEP

AUTO

CAL

AV

?/1

VIDEO 1 VIDEO 2 DVD SA-CD/CD

2CH A.F.D.

RETURN/EXIT

TV CH –

PRESET –

TV CH +

PRESET +

TUNING –

TV

TUNING +

REPLAY ADVANCE

MENU

MOVIE MUSIC

MEMORY DVD MENU

CLEAR

TOOLSDISPLAY

MUTING

TV VOL

MASTER VOL

FM MODE

D.TUNING

D.SKIP

DUAL MONO

TUNER

AMP MENU

TV

?/1

-

F

Gg

f

.

HmM

Xx

<

>

5

AV ?/1 (on/standby) switch

TV ?/1, ?/1 (

on/standby) switch

>10/

1

3

2

wf

wg

5

6

7

8

q;

9

qs

qd

qf

qg

qj

qk

qh

ql

qa

4

w;

wa

ws

wd

Name Function

A AV ?/1 Press to turn on or off the

Sony audio/video components that the remote is assigned to operate. If you press ?/1 (B) at the same time, it will turn of f the receiver and other components (SYST EM STANDBY).

Note

The function of the AV ?/1 switch changes automa tically each time you press the input buttons (C).

B TV ?/1 Press TV ?/1 and TV (P) at

the same time to turn th e TV on or off.

?/1 Press to turn the recei ver o n or

off. To turn off all components, press ?/1 and AV ?/1 (A) at the same ti me (SYSTEM STANDBY).

C Input buttons Press one of the buttons to

select the component you want to use. When you press any of the input buttons, the receiver turns on. The buttons are factory assigned to control Sony components as follows.

D AMP ME NU Press to display the menu of

the receiver. Then, use the control buttons to perform menu operations.

E MOVIE,

MUSIC

Press to select sound fields (MOVIE, MUSIC).

Button Assigned Sony

component

VIDEO 1 VCR (VTR mode 3) VIDEO 2 VCR (VTR mode 2) DVDDVD player SA-CD/CD Super Audio CD/CD

player

TUNER Built-in tuner

9

STR-K680/K780

F DUAL MONO Press to select the language

you want during digital broadcast.

G FM MODE Press to select FM monaural

or stereo reception.

H D.TUNING Press to enter direct tuning

mode.

D.SKIP Press to skip disc of the CD

player or DVD player (multidisc changer only).

I ENTER Press to enter the value after

selecting a channel, disc or track using the num eric buttons.

MEMORY Press to store a station.

J DVD MENU Press to display the menu of

the DVD player on the TV screen. Then, use the control buttons to perform menu operations.

K TOOLS Press to display options

applicable to the entire disc (e.g. disc protection), recorder (e.g. audio settings during recording), or multiple items on a list menu (e.g. erasing multiple titles).

L MUTING Press to mute th e sound. M TV VOL

+*/–

Press TV VOL +/– and TV (P) at the same time to adjust the TV volume level.

MASTER VOL +*/–

Press to adjust the volume level of all speakers at the same time.

N MENU Press to display the menus of

the VCR, DVD player, or satellite tuner on the TV screen. Then, use the control buttons to perform menu operations.

Name Function

O ./> Press to skips tracks of the CD

player, DVD player, or tape deck.

REPLAY / ADVANCE

Press to replay the previous scene or fast forward the current scene of the VCR or DVD player.

m/M Press to

–search tracks in the forward/

backward direction of the DVD player.

–fastforward/rewind of the

VCR, CD player, or tape deck.

H* Press to start playback of the

VCR, CD player, D VD player, or tape deck.

X Press to pause playback or

recording of the VCR, CD player, DVD player, or tape deck. (Also starts recording with components in recording standby.)

x Press to stop playback of the

VCR, CD player, D VD player, or tape deck.

TV CH +/– Press TV CH +/– and TV (P)

at the same time to se lect preset TV channels.

PRESET +/– Press to select

–preset stations. –preset channe ls of the VCR

or satellite tuner.

TUNING +/– Press to scan a station.

P TV Press TV and the button you

want at the same time to activate the button s wi th orange printin g.

Q RETURN/

EXIT O

Press to –return t o the previous menu. –exit the menu while the

menu or on-screen guide of the VCR, DVD player, or satellite tuner is displayed on the TV screen.

Name Function

<

10

STR-K680/K780

*The number 5, MASTER VOL +, TV V O L +, and

H buttons have tactile dots. Use the tact ile dots as references whe n operating the receiver.

Notes

Some functions explained in this section may not

work depending on the m odel.

The above explanation is intended to serve as a n

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

R Control

buttons

After pressing AMP MENU (D), DVD MENU (J), or MENU (N), press the control button V, v, B or b to select the settings. When you press DVD MENU or MENU, press the control button to enter the selection.

S DISPLAY Press to select the information

displayed on the TV screen of the VCR, sate llite tuner, CD player or DVD player.

T -/-- Press -/-- and TV (P) at the

same time to select the channel entry mode, eith er one or two digits of the TV.

>10/

x

Press to select –track numbers over 10 of the

VCR, satellite tuner or CD player.

–channel numbers of the

Digital CATV terminal.

CLEAR Press to

–clear a mistake when you

press the incorrect numer ic buttons.

– return to continuous

playback, etc. of the satellite tuner or DVD player.

U Numeric

buttons (number 5*)

Press to –preset/tune to preset

stations.

–select track numbers of the

CD player or DVD player. Press 0/10 to select track number 10.

–select channel numbers of

the VCR or satellite tuner. Press the numeric buttons and TV (P) at the same time to select the TV channel s .

V 2CH Press to select 2CH STEREO

mode.

W A.F.D. Press to select A.F.D. mode. X AUTO CAL Press to activate the A uto

Calibration function.

Name Function Name Function

Y TV/VIDEO Press TV/VIDEO and TV

(P) at the same time t o select the input signal ( TV input or video input).

SLEEP Press to activate the Sleep

Timer function and the duration which the receiver turns off autom atically.

11

STR-K680/K780

FACTORY PRESET MODE

All preset contents are reset to the default setting.

Procedure:

1. While depressing the PRESET TUNING – and the DIMMER buttons simultaneously, press the power ?/1 button to turn on the main power.

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

AM CHANNEL STEP 9 kHz/10 kHz SELECTION MODE

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

Procedure:

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

2. While depressing the TUNING + button, press the power ?/1 button to turn on the main power.

3. Either the message “9 k STEP” or “10 kSTEP” appears. Select the desired step.

FLUORESCENT INDICATOR TUBE TEST MODE

All fluorescent segments are tested. When this test is acti v ated, all segments turn on at the same time, then each segment turns on one after another.

Procedure:

1. While depressing the PRESET TUNING – and the AM buttons simultaneously, press the power ?/1 button to turn on the main power.

2. All segments turn on.

3. Press either of the VIDEO1 or VIDEO2 or DVD or SA-CD/CD or FM or AM button.

4. Press either of the VIDEO1 or VIDEO2 or DVD or SA-CD/CD or FM or AM button once again.

5. Press either of the VIDEO1 or VIDEO2 or DVD or SA-CD/CD or FM or AM button once ag ain. All segments turn off.

SOUND FIELD CLEAR MODE

The preset sound field is cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair.

Procedure:

1. While depressing the 2CH button, press the power ?/1 button to turn on the main power.

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

SOFTWARE VERSION DISPLAY MODE

The software version is displayed.

Procedure:

1. While depressing the PRESET TUNING – and the < buttons simultaneously, press the power ?/1 button to turn on the main power.

2. The model name, destination and the software version are displayed.

KEY CHECK MODE

Button check

Procedure:

1. While depressing the < and the A.F.D. buttons simultaneously, press the power ?/1 button to turn on the main power. “REST 25” appears.

2. Every pressing of any button other than ?/1 counts down the buttons. The buttons which are already counted once are not counted again.

3. When all buttons are pressed “REST 00” appears.

SHIPMENT MODE

All preset contents are reset to the default setting.

Procedure:

1. While depressing the AM and the A.F.D. buttons simultaneously, press the power ?/1 button to turn on the main power.

2. “CLEARED” appears and switch off the set.

PROTECTOR

Procedure:

1. While depressing the PRESET TUNING – and the 2CH buttons simultaneously, press the power ?/1 button to turn on the main power.

2. “PROT. EVER” appears and switch off the set.

DECODE AUTO ALL

Procedure:

1. While depressing the PRESET TUNING – and the + buttons simultaneously, press the power ?/1 button to turn on the main power.

2. “DEC. TEST” appears and switch off the set.

VACS CONTROL

Procedure:

1. While depressing the < and the DIMMER buttons simultaneously, press the power ?/1 button to turn on the main power.

2. “VACS OFF” appears. (8 second)

L

SW

CR

SL S SR

SBL SB SBR

LFE

SP A SP B SLEEP OPT COAX MULTI CH IN 96/24

DIGITALEX PRO LOGIC II x DTS-ES NEO:6 MPEG-2 AAC RDS

D.RANGE EQ STEREO MONO

D

dB

kHz mft. MHz

MEMORY

DIRECT

LSWR

S

SB

LFE

SP A SP B SLEEP OPT COAX MULTI CH IN 96/24

DIGITALEX PRO LOGIC II x DTS-ES NEO:6 MPEG-2 AAC RDS

D.RANGE EQ STEREO MONO

D

dB

kHz mft. MHz

MEMORY

DIRECT

C

SL SR

SBL SBR

SP A SP B SLEEP OPT COAX MULTI CH IN 96/24

DIGITALEX PRO LOGIC II x DTS-ES NEO:6 MPEG-2 AAC RDS

D.RANGE EQ STEREO MONO

D

kHz mft. MHz

MEMORY

DIRECT

SECTION 2

TEST MODE

12

STR-K680/K780

SWAP ALL MODE

Procedure:

1. While depressing the PRESET TUNING – and the A.F.D.

buttons simultaneously, press the power ?/1 button to turn on the main power.

2. “SWP.ALL” appears. (No change while displayed.)

ADCC FACTORY TEST MODE

ADCC Factory Test mode have two stages:

1. ADCC DSP Data Line Checking

2. ADCC AUTO CAL MIC board Checking

Factory Test System Setup

1. When power off :

Press the three buttons < + DISPLAY + ?/1 . (If it doesn’t operate, please press DISPLAY again afetr 2 seconds.) Afterward, press the DIMMER to start DCAC factory test mode.

1. ADCC DSP Data Line Checking

After press the DIMMER , DCAC Factory test mode will start, below display will show:

“DCAC[][][]x” x = 1, 2, 3 If there is error happen, below display will show:

“ERR[]SD0x” x = 1 → D1112 or R1198 problem

x = 2 → D1113 problem x = 3 → D1114 problem

2. ADCC AUTO CAL MIC board Checking

Connect front left speaker of the receiver and AUTO CAL microphone. Turn MASTER VOLUME jog, there will be test tone sound output from front left speaker, and the display will change accordingly.

“AD[]-[]xxx” xxx = 0 to 255 (depends on loudness of test tone)

DSP Data Line

Check

Start Pass Pass

Auto Cal Mic

Check

END

SPK Front Left

ADCC MIC

Receiver

Ver. 1.3

1313

STR-K680/K780

•Waveforms – DIGITAL Board –

For Schematic Diagrams. Note:

• 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.

• % : indicates tolerance.

• f : internal component.

• 2 : nonflammable resistor.

• 5 : fusible resistor.

• C : panel designation.

• A : B+ Line.

• B : B– Line.

•Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. No mark : FM

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

•Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

F : FM J : ANALOG c : DIGITAL I : VIDEO

•Abbreviation AR : Argentina model AUS:Australian model E51 : Chilean and Peruvian models MX : Mexican Model RU : Russian model SP : Singapore model SP6 : Singapore and Malaysia models

For Printed Wiring Boards. Note:

• X : parts extracted from the component side.

• a: Through hole.

• f : internal component.

• : Pattern from the side which enables seeing.

• Indication of transistor.

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)

Caution: Pattern face side: Parts on the pattern face side seen from (Side B) the pattern face are indicated. Parts face side: Parts on the parts face side seen from (Side A) the parts face are indicated.

1

IC1501 9 (MCLK1)

1 V/DIV, 40 ns/DIV

72 ns

3.4 Vp-p

2

IC1101 id (X1)

1 V/DIV, 20 ns/DIV

41.6 ns

4.2 Vp-p

3

IC1301 ws (XIN)

1 V/DIV, 40 ns/DIV

81 ns

4.4 Vp-p

C

B

These are omitted.

E

Q

B

These are omitted.

CE

SECTION 3 DIAGRAMS

• Circuit Boards Location

DIGITAL board

VIDEO board (K780 only)

AC SELECT board (E51 only)

MAIN board

DISPLAY board

HEADPHONE board

POWER board

ADCC board

TUNING board

STANDBY board

Note: The components identified by mark 0 or dotted

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

Ver. 1.2

1414

STR-K680/K780

3-1. BLOCK DIAGRAM – MAIN SECTION –

• Signal Path

: FM

: ANALOG

: DIGITAL

: VIDEO

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

AUDIO IN

PROCESSOR

49

LOUT

40

SLOUT

33

COUT

DATA

24

CLK

25

21

VOL_CLK

VOL_DATA_LATCH

SDA

SCL

22

IC1101(2/3)

DVD

IN

VIDEO 2

IN

J1301

35

62

IC1303(1/2)

DIGITAL AUDIO

I/F RECEIVER

IC1301

L

+7V

DISPLAY/ POWER SECTION (Page 15)

DIN2

5

DO

35

DI

36

CLK

38

CE

37

ERROR

34

XSTATE

17

XMODE

48

13

CK OUT

20

XMCK

14

BCK

15

LRCK

16

DATAO

IC1303(2/2)

57

3

1

IC2000(1/2)

IC2000(2/2)

X1301

12.288MHz

AUDIO DSP

IC1503

SELECTOR

IC1501

KFSI0

SYSCLK

LRCK

BCK

DOUT

22

16

13

14

15

SDI2

30

LRCK0

19

HCLK

34

HCS

36

HACN

32

PM

113

BST

56

XRST

2

23

SDO1

24

SDO2

25

SDO3

BCKI2

29

LRCKI2

28

BCKII

17

LRCKII

15

IC1502

SRAM

AUDIO CODEC

IC1452

AD CONVERTER

IC1401

SCK1

38

RST

37

ML

36

MC

35

MDI

34

MDO

33

10

VOUT5

BCK

40

LRCK

41

DATA3

47

DATA1

45

DATA2

46

14

VOUT1

12

VOUT3

11

VOUT4

ANALOG SOUND

SL

ADIFL

13

LIN

16

19

20

21

SL

C

32

SWOUT

SBL

SW

SLIN

CIN

SWIN

A

98 97 95 96 99100 94 1

DO

DI

CLK

CE

ERROR

XSTATE

CKSEL1

DATA0

92

LRCK_SW

20

HCLK

4

HCS

5

HACN

7PM3

BST

6

XRST

8

GP12

10

PCM1608_RST

ADCC_DSP_IN

45

ADCC_ANA_OGUE_IN

12

PCM1608_ML

13

PCM1608_MC

14

PCM1608_MDI

15

PCM1608_MDO

5 6

29 30

J402

J2000

J400

VIDEO 1

VIDEO 2

SA-CD/CD

DVD

OPTICAL

IN

IC1353

DIN1

4

22 21

XIN XOUT

93

XMODE

CKSEL1

47

GP9

68

HD OUT

35

HD IN

33

2

GP9

18

HD OUT

19

HD IN

9

MCLK1

12

MCLK2

X1502

13.9MHz

14

SCK OUT

1

LIN

6

RST

20

BCKO

19LRCKO

18SDI1

24

6

1 5

2

AUDIO

GP8

69

EXLOCK

59

GP12

37

INL1

10

TN1

TUNER PACK

FM

75 Ω

COAXIAL

AM

R-CH

ST-DI

ST-DO

CLK

CE

STEREO

TUNED

MUTING

FM

AM

R CH

L CH

TUNER +10V10V

SYSTEM CONTROLLER

IC1101(1/3)

DO

73

SLATCH

74

TUNER-DATA

17

T.SERIAL CLK

16

STEREO

76

TUNED

75

MUTE

78

FM SIG OUT

RDS_SIG

43

RDS_INT

RDS_CLK

52

RDS_DATA

53

COAXIAL

OPTICAL

DIGITAL

VIDEO 1

IN

OPTICAL

IN

IC1352

DIN0

3

OPTICAL

ANTENNA

AUTO CAL MIC

D1301

D1113

D1114

D1112

IC400

SDA SCL

EEPROM

IC1131

IC502

WOOFER AMP

Q471

+3.3V REG

INL4

4

INL5

2

26

DVDD

SB

AY

INL3

6

INL2

8

9

PCM1800_RST

37

57

AEP,UK,RU

K780

K680

IC203

VIDEO AMP

IC807

+5V REG

11

12

M

V3

4S22S213

888786

S1

VIDEO IN

J201 (1/2)

J203

VIDEO 1

VIDEO IN

VIDEO 2

VIDEO IN

DVD

1

V1

3

V2

10

MON

MONITOR

+ V

J201(2/2)

VIDEO OUT

8

+5V

IC804

-5V REG

- V

14

-5V

J251 (1/2)

Y

PR/CR/R-Y

PB/CB/B-Y

Y

DVD IN

VIDEO 2

IN

COMPONENT

VIDEO

PR/CR/R-Y

PB/CB/B-Y

CH1 IN2

3

CH2 IN2

9

CH3 IN2

14

CH1 IN3

5

CH2 IN3

11

CH3 IN3

12

SW1 2SW2

4

CH1 OUT

22

CH2 OUT

20

CH3 OUT

18

Y

PR/CR

/R-Y

PB/CB

/B-Y

MONITOR

OUT

CONPONENT

VIDEO

J251 (2/2)

VIDEO AMP

IC251

Ver. 1.1

1515

STR-K680/K780

3-2. BLOCK DIAGRAM – DISPLAY/POWER SECTION –

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

• Signal Path

: FM

IN2

8

12

+V OUT2

POWER AMP

IC501

POWER AMP

IC601

9

NF2

LIMITER

Q501,502

11

-V OUT2

IN2

12

+V OUT2

9

NF2

11

-V OUT2

BOOSTER

Q503

BOOSTER

Q504

CURRENT

DETECT

Q505,506

AF POWER

PROTECT

Q507

LIMITER

Q601,602

BOOSTER

Q603

BOOSTER

Q604

CURRENT

DETECT

Q605,606

IN2

8

12

+V OUT2

POWER AMP

IC701

9

NF2

LIMITER

Q701,702

11-V OUT2

BOOSTER

Q703

BOOSTER

Q704

CURRENT

DETECT

Q705,706

2

+V OUT1

5

NF1

LIMITER

Q571,572

3-V OUT1

BOOSTER

Q754

BOOSTER

Q753

CURRENT

DETECT

Q755,756

D883

D529

D729

PROTECT SWITCH

Q881-883

RELAY

DRIVE

Q509

RY502

RELAY

DRIVE

Q508

RY501

RELAY DRIVE

Q608

RY601

RELAY

DRIVE

Q708

RY701

L

R

L

R-CH

PHONES

TM600(1/2)

TM601(1/2)

TM601(2/2)

TM600(2/2)

61

PROTECTOR

62

HP RY

66

FRONT RY

68

REAR RY

67

C/SW RY

46

VACS

RV102

ENCODER

3 1

VOL_ENC(B)65VOL_ENC(A)

64

POWER KEY

56

?/1

S152

77

RSTX

48

STOP

54

SIRCS

63

FUSE DETECT

REMOTE CONTROL RECEIVER

1

IC102

D910-913

AC IN

T902

RY901

D915D914

RELAY DRIVE

Q901

D920-923

23

VCC5

84

VCC3

–7V

REG

3 2

+7V REG

1 3

AUDIO

+7V

IC821

IC822

POWER RY

58

RELAY

+B

D804-807

82 83

X0

X1

X1101

24MHz

F1

F2

L

SLSL

C

A

IN1

6

SBL

SW

J700

FLUORESCENT

INDICATOR TUBE

FL101

59

FL_DATA

60

FL_CLK

47

FL_LAT

7

DIN8CLK9STB

14 29

SEG1-16

42 31

GRID1-12

F1 F2

FL DRIVE

IC100

FUNCTION

KEY

A/D0

38

S100-108

S131-139

FUNCTION

KEY

A/D1

39

S110-116

FUNCTION

KEY

A/D2

40

SYSTEM CONTROLLER

IC1101(3/3)

AF POWER

PROTECT

Q607

AF POWER

PROTECT

Q707

IC850(1/2)

21

FRONT

SURROUND

R

L

R-CH

TM602

SURROUND

IC850(2/2)

57

55

HP DETECT

BUFFER

IC101

35

AVCC

+3.3V

REG

3 1

IC1904

AUDIO

–7V

+10V REG

3 1

TUNER

+10V

IC1902

+3.3V REG

3 1

TUNER

+3.3V

IC1071

T901

Q911

AC DET

1 2

IC1111

D811

R803

+B

–B

SWITCH

Q851,852

–20V REG

Q801

FL101

–20V

+B SWITCH

Q860-862

POWER AMP

+B

POWER AMP

–B

+5V REG

3 1

IC1031

+5V

+2.5V REG

5

+2.5V

+3.3V REG

2

4

IC1901

+3.3V

+5V

REG

3 1

IC1001

AUDIO

+5V

SPEAKERS

IMPEDANCE USE 6-16Ω

MASTER

VOLUME

8

RESET

+3.3V(STBY)

MAIN SECTION (Page 14)

CENTER

SUB

WOOFER

RELAY DRIVE

Q560

RY702

AUDIO OUT

J403

SUB WOOFER

K780

AEP,UK,RU

K680

K780

VOLTAGE

SELECT

S901

E51

Ver. 1.1

1616

STR-K680/K780

3-3. PRINTED WIRING BOARD – DIGITAL BOARD (SIDE A) –

:Uses unleaded solder.

• Semiconductor Location

Ref. No.

Location

D1001 C-5 D1301 C-3 D1302 C-2

IC1101 D-5 IC1111 D-6 IC1131 E-5 IC1301 C-2 IC1303 D-2 IC1401 E-2 IC1452 E-3 IC1501 D-4 IC1502 C-4 IC1503 E-4

• See page 13 for Circuit Boards Location.

IC1301

IC1303

IC1502

IC1101

IC1111

IC1131

IC1503

IC1401

IC1452

IC1501

VIDEO

BOARD

CNS250

(Page 30)

1

12

36

37

25

482413

C1063

AEP,UK

R1058

R1059

R1175

AEP,UK,RU

EXCEPT AEP,UK,RU

K780

CNS509

1

5

11236

25

13 24

48

37

1

30

31

90

91

120

61

60

13

45

12

A

B

C

D

E

34567

M

C1360

R1359

R1301

FB1306

R1352

R1362

R1318

C1315

R1303

C1303

R1353

C1302

R1503

R1506

R1502

R1504

R1304

C1304

R1363

C1301

C1516

C1253

R1311

C1251

R1313

R1312

R1316 R1315

R1309

D1301

D1302

R1310

R1306

C1310

JR1511

R1360

R1307

R1308

R1305

JR1020

X1301

FB1502

FB1305

C1309

C1361

R1357

R1356

C1357

R1505

R1358

JR1502

X1502

R1402

C1405

FB1503

C1494

R1120

R1137

R1066

R1532

C1408

R1401

R1556

R1474

C1002

R1460

C1401

FB1452

R1403

R1470

FB1405

R1407

R1446

C1566

R1461

R1486

C1147

C1148

C1422

R1168

R1464

C144

R1476

C1432

C1487

R1472

R1471

R1484

R1445

R1436

R1508

R1475

R1435

R1425

R1426

R1466

R1153

R1509

R1154

R1152

R1072

R1098

R1073

R1151

R1529

R1510

R1155

R1531

R1143

R1160

R1121

R1144

R1161

R1142

R1149

R1162

R1517

R1552

R1521

R1519

R1572

R1571

R1574

R1573

C1521

C1511

C1522 R1515

R1546

R1541

R1555

R1523

R1501

R1545

R1542

R1547

R1544

R1539

R1535

R1540

R1536

R1533

R1537

R1538

R1534

R1134

R1041

R1136

R1135

R1518

R1554

R1520

R1522

R1526

R1551

R1553

R1525

R1548

R1068

R1550

R1549

R1119

R1140

R1115

R1113

R1065

R1150

R1067

R1042

C1107

R1109

R1044

X1101

R1527

R1543

R1570 R1528

R1511

R1107

R1108

R1112

R1524

R1127

R1083

R1035

R1106

R1122

R1123

R1105

R1186

R1094 R1095

R1129

R1124

D1001

FB1308

R1076

R1635

R1190 R1128

C1495

R1082

R1088

R1180

C1123

R1071

R1077

R1459

R1458

C1124

C1122

R1179

R1636

R1078

C1620

R1605

R1159

R1097

C1913

Ver. 1.3

1717

STR-K680/K780

3-4. PRINTED WIRING BOARD – DIGITAL BOARD (SIDE B) –

• Semiconductor Location

Ref. No.

Location

D1003 D-7 D1004 D-7 D1107 C-3 D1110 C-3 D1111 C-3 D1112 D-6 D1113 D-6 D1114 D-7

IC1001 F-6 IC1031 B-3 IC1071 B-5 IC1352 C-7 IC1353 C-7 IC1901 C-3 IC1902 B-4 IC1904 C-3

:Uses unleaded solder.

• See page 13 for Circuit Boards Location.

D E

STANDBY

BOARD

CNP801

(Page 26)

G

MAIN

BOARD

CNP501

(Page 21)

F

C

MAIN

BOARD

CNP502

(Page 21)

DISPLAY

BOARD

CNS100

(Page 27)

B

MAIN

BOARD

CNP503

(Page 21)

A

MAIN BOARD CNP503

(Page 21)

MAIN

BOARD

CN504

(Page 21)

TN1

TUNER UNIT

IC1901

IC1904

IC1031

IC1902

IC1353

IC1352

IC1001

IC1071

VIDEO 2

IN

VIDEO 1

IN

DVD IN

COAXIAL

DIGITAL

OPTICAL

1

2

3

5

114

5

AEP,UK,RU

K780

3

1

EXCEPT AEP,UK,RU

1

5

6

8

12

A

B

C

D

E

F

3456789

1

3

1

3

1

C1905

C1032

C1031

CNP505

CNS501

C1005

R1492

C1454

JR1202

R1201

C1908

C1906

C1021

D1110

D1111

D1107

CNP503

C1022

C1103

C1102

C1137

C1138

R1189

C1299

FB1101

CNP504

C1100

C1130

R1187

C1143

C1129

R1039

CNS504

CNS505

C1140

C1108

R1099

C1254

C1255

C1604

C1120

C1142

R1096

R1163

C1121

C1139

C1149

R1117

R1156

R1157

C1458

C1568

R1164

R1194

C1118

C1119

C1502

R1493

R1495

CNS502

R1167

C1418

C1567

C1569

C1462

C1472

R1491

C1468

R1494

C1506

C1504

C1428

R1118

R1049

C1507

C1505

C1525

C1491

C1483

C1503

C1438

C1547

C1448

C1001

C1514

C1508

C1501

R1514

C1450

C1460

C1457

C1404

C1406

C1407

C1402

C1409

J1301

FB1453

C1403

R1513

R1355

C1362

C1356

R1512

C1355

D1112

D1113

R1198

D1004

C1004

D1003

D1114

C1352

C1305

C1359

C1314

C1312

C1518

C1515

C1517

C1353

C1358

C1306

C1308

R1302

FB1501

FB1302

R1261

C1313

R1314

C1252

C1520

R1260

CNS508

R1252

R1251

C1519

C1509

C1513

C1510

C1914

C1206

C1064

K780

R1193

Ver. 1.3