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SERVICE MANUAL
Sony CorporationHome Audio DivisionPublished by Sony Techno Create Corporation
• STR-K685 is the tuner and the amplifiersection in HT-DDW685.
This receiver incorporates Dolby* Digital and Pro Logic Surround andthe DTS** Digital Surround System.* Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic” and the double-D symbol are trademarks ofDolby Laboratories.
** “DTS” and “DTS Digital Surround” are registered trademarks of DTS,Inc.
— Continued on next page —
Amplifier sectionModels of area code SP, SP6, E51, MX, THPower Output1)
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)70 W + 70 W
2)Reference power output for front, center, surround speakers and sub woofer. Depending on the sound field settings and the source, there may be no sound output.
3)Measured under the following conditions:
InputsAnalog Sensitivity: 800 mV/
50 kohmsDigital (Coaxial) Impedance: 75 ohms
ToneGain levels ±6 dB, 1 dB step
Reproduction frequency range:28 – 20,000 Hz
FM tuner sectionTuning range 87.5 - 108.0 MHzAntenna FM wire antennaAntenna terminals 75 ohms, unbalancedIntermediate frequency
10.7 MHz
Area code Power requirements
AR 220 V AC, 50 Hz
127 V AC, 60 Hz
2
STR-K685
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 SOLDERBoards requiring use of unleaded solder are printed with the lead-free 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 MARKUnleaded 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 beapplied to the solder joint for a slightly longer time.Soldering irons using a temperature regulator should be set toabout 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 bridgesoccur such as on IC pins, etc.
• Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder mayalso be added to ordinary solder.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORIN SUPPLEMENTS PUBLISHED BY SONY.
About area codesThe 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”.
FRONTCENTERLR
LR
SPEAKERS
Area code
AM tuner sectionTuning rangeModels of area code SP, SP6, THWith 9-kHz tuning scale:
531 – 1,602 kHzModels of area code E51:With 10-kHz tuning scale:
530 – 1,610 kHz4)
With 9-kHz tuning scale:531 – 1,602 kHz4)
Models of area code AR, MXWith 10-kHz tuning scale:
530 – 1,610 kHzAntenna Loop antennaIntermediate frequency
450 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 MOVIE, 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.
GeneralPower requirements
Power consumption
Power consumption (during standby mode)0.3 W
Dimensions (w/h/d) (Approx.)429 × 145 × 308 mm (16 7/8 × 5 6/8 × 12 1/8 inches) including projecting parts and controls
Mass (Approx.) 7.4 kg (16 lb 9 oz)
Area code Power requirements
SP, SP6, TH 230 – 240 V AC, 50/60 Hz
E51 120/220/240 V AC, 50/60 Hz
AR 220 – 230 V AC, 50/60 Hz
MX 127 V AC, 60 Hz
Area code Power consumption
SP, SP6, E51, AR, MX, TH
190 W
Design and specifications are subject to change without notice.
• AbbreviationAR : Argentine modelE51 : Chilean and Peruvian modelsMX : Mexican modelSP : Singapore modelSP6 : Singapore and Malaysia modelsTH : Thai model
Ver. 1.2
Model Part No.
SP and SP6 models 2-896-343-0[]
E51 model 2-896-343-1[]
MX model 2-896-343-2[]
AR model 2-896-343-3[]
TH model 2-896-343-7[]
Parts No.
MODEL IDENTIFICATION– Rear Panel –
3
STR-K685
TABLE OF CONTENTS
1. GENERAL ................................................................... 4
2. TEST MODE ............................................................... 10
6. ELECTRICAL PARTS LIST .................................. 41
4
STR-K685SECTION 1GENERAL
Front panel
Receiver
VIDEO 1 IN/PORTABLE AUDIO IN/
AUTO CAL MIC
PHONES
INPUT SELECTOR
A.F.D. MOVIE MUSIC
?/1
9q;qf qaqd
1 2 3 4 765 8
qs
DIMMER SLEEP 2CH
DISPLAY
MASTER VOLUME
AUTO CAL
Name FunctionA ?/1
(on/standby)Press to turn the receiver on or off.
B DIMMER Press to adjust the brightness of the display.
C SLEEP Press to activate the Sleep Timer function and the duration which the receiver turns off automatically.
D 2CH Press to select 2CH STEREO mode.
E Display The current status of the selected component or a list of selectable items appears here.
F DISPLAY Press to select information displayed on the display.
G AUTO CAL Press to activate the Auto Calibration function.
Name FunctionH MASTER
VOLUMETurn to adjust the volume level of all speakers at the same time.
I INPUT SELECTOR
Turn to select the input source to playback.
J Remote sensor Receives signals from remote commander.
K MOVIE, MUSIC Press to select sound fields (MOVIE, MUSIC).
L A.F.D. Press to select A.F.D. mode.
M PHONES jack Connects to a headphone.
N VIDEO 1 IN/PORTABLE AUDIO IN/AUTO CAL MIC jack
– Connects to the supplied optimizer microphone for the Auto Calibration function.
– To connect a portable audio such as MP3 player, etc..
5
STR-K685
About the indicators on the display
SW LFE
L C R
SL S SR
;D ;PLII ;PL OPT DTS MEMORY RDS STMONOD.RANGECOAX
1 2 3 4 5 6 87
qs qa 9q;
Name Function
ASW Lights up when audio signal is output from 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; D Lights up when the receiver is decoding Dolby Digital signals.
D; PL/; PLII
“; PL” lights up when the receiver applies Pro Logic processing to 2 channel signals in order to output the center and surround channel signals.“; PLII” lights up when the Pro Logic II Movie/Music decoder is activated.NoteDolby Pro Logic and Dolby Pro Logic II decoding do not function for DTS format signals.
EOPT Lights up when VIDEO 2 input is selected. However, “UNLOCK” appears on the display if no digital signal is input through the OPTICAL jack.
Name Function
FDTS Lights up when the receiver is decoding DTS signals.
GMEMORY Lights up when a memory function, such as Name Input, Preset Memory, etc., is activated.
H Tuner Indicators
Lights up when using the receiver to tune in radio stations,
etc.Note“RDS” appears for models of area code AEP, UK only.
I Preset station indicators
Lights up when using the receiver to tune in radio stations you have preset. For details on presetting radio stations.
JD.RANGE Lights up when dynamic range compression is activated.
KCOAX Lights up when DVD input is selected. However, “UNLOCK” appears on the display if no digital signal is input through the COAXIAL jack.
L Playback channel indicators
LRCSLSRS
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 LeftFront RightCenter (monaural)Surround LeftSurround RightSurround (monaural or the surround components obtained by Pro Logic processing)Example:Recording format (Front/Surround): 3/2.1Sound Field: A.F.D. AUTO
SW LFE
L C R
SL SR
6
STR-K685
Rear panel
* The numbers of the SUB WOOFER terminals varies depending on the models.
1 2 43
SUBWOOFER SURROUND
DVD IN
DIGITALOPTICAL
VIDEO 2/BD IN
COAXIAL
ANTENNA
LR
LR
AM
SA-CD/CD
L
R
AUDIO IN
TV
AUDIO IN
SAT
AUDIO IN
SPEAKERS SPEAKERS
FRONTCENTERLR
LR
ADIGITAL INPUT section
OPTICALIN jack
Connects to a DVD player, etc. The COAXIAL jack provides a better quality of loud sound (page 19).
COAXIAL IN jack
BANTENNA section
FMANTENNA jack
Connects to the FM wire antenna supplied with this receiver (page 21).
AM ANTENNA terminals
Connects to the AM loop antenna supplied with this receiver (page 21).
CAUDIO INPUT section
AUDIO IN jacks
Connects to a CD player, etc. (page 17).
DSPEAKER section
Connects to the speakers and sub woofer* (page 15).
White (L)
Red (R)
7
STR-K685
You can use the supplied remoteRM-AAU013 to operate the receiver and to control the Sony audio/video components that the remote is assigned to operate.
RM-AAU013
Remote commander
1 2 3
4 6
7 8
0/10 ENTER
9
SYSTEM STANDBY
TV INPUTSLEEP
AUTO CAL
TV ?/1AV ?/1
VIDEO 1 VIDEO 2 VIDEO 3 DVD
2CH A.F.D.
RETURN/EXITTV CH –
PRESET –TV CH +
PRESET +
TUNING –
TV
TUNING +
REPLAY ADVANCE
MENU
MOVIE MUSIC
MEMORY DVD MENU
CLEAR
TOOLSDISPLAY MUTING
TV VOLMASTER VOL
FM MODE
D.TUNING
D.SKIP
AMP MENU
SAT TV SA-CD/CD TUNER
?/1
-
F
G g
f
.
Hm M
X x
< < >
5
>10/
wd
qj
ql
qk
w;
wa
ws
qg
1
3
2
6
7
8
q;9
qf
qs
qa
4
5
qdqh
Name Function
A TV ?/1 (on/standby)
Press TV ?/1 and TV (O) at the same time to turn the TV on or off.
AV ?/1(on/standby)
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 off the receiver and other components (SYSTEM STANDBY).NoteThe function of the AV ?/1 switch changes automatically each time you press the input buttons (C).
B ?/1(on/standby)
Press to turn the receiver on or off.To turn off all components, press ?/1 and AV ?/1 (A) at the same time (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.
Button Assigned Sony component
VIDEO 1 VCR (VTR mode 3)
VIDEO 2 VCR (VTR mode 2)
VIDEO 3 Not assigned
DVD DVD player
SAT Satellite tuner
TV Television
SA-CD/CD Super Audio CD/CD player
TUNER Built-in tuner
8
STR-K685
Name Function
D 2CH Press to select 2CH STEREO mode.
A.F.D. Press to select A.F.D. mode.
MOVIE, MUSIC
Press to select sound fields (MOVIE, MUSIC).
E AMP MENU Press to display the menu of the receiver. Then, use V, v, B, b and to perform menu operations.
F FM MODE Press to select FM monaural or stereo reception.
G D.TUNING Press to enter direct tuning mode.
D.SKIP Press to skip disc of the CD player or DVD player (multi-disc changer only).
H DVD MENU Press to display the menu of the DVD player on the TV screen. Then, use V, v, B, b and to perform menu operations.
I ENTER Press to enter the value after selecting a channel, disc or track using the numeric buttons of the TV, VCR or satellite tuner.
MEMORY Press to store a station.
J 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). Press TOOLS and TV (O) at the same time to display options applicable to the TV.
K MUTING Press to activate muting function.Press MUTING and TV (O) at the same time to activate the TV’s muting function.
L TV VOL +*/–
Press TV VOL +/– and TV (O) 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.
Name Function
M MENU Press to display the menus of the VCR, DVD player, Blu-ray disc player or satellite tuner on the TV screen.Press MENU and TV (O) at the same time to display the TV’s menu. Then, use V, v, B, b and to perform menu operations.
N ./> Press to skips tracks of the CD player, DVD player or Blu-ray disc player.
m/M Press to search tracks in the forward/backward direction of the DVD player or to fast forward/rewind of the VCR, CD player or Blu-ray disc player.
H* Press to start playback of the VCR, CD player, DVD player or Blu-ray disc player.
X Press to pause playback or recording of the VCR, CD player, DVD player or Blu-ray disc player. (Also starts recording with components in recording standby.)
x Press to stop playback of the VCR, CD player, DVD player or Blu-ray disc player.
TV CH +/– Press TV CH +/– and TV (O) at the same time to select preset TV channels.
PRESET +/– Press to select preset stations or preset channels of the VCR or satellite tuner.
TUNING +/– Press to scan a station.
O TV Press TV and the button you want at the same time to activate the buttons with orange printing.
P REPLAY /ADVANCE
Press to replay the previous scene or fast forward the current scene of the VCR, Blu-ray disc player or DVD player.
<
<
9
STR-K685
* The number 5, MASTER VOL +, TV VOL +, and H buttons have tactile dots. Use the tactile dots as references when operating the receiver.
Notes• Some functions 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 described.
• The VIDEO 3 button on the remote is not available for receiver operation.
Name Function
Q RETURN/EXIT O
Press to return to the previous menu or exit the menu while the menu or on-screen guide of the VCR, DVD player, or satellite tuner is displayed on the TV screen.Press RETURN/EXIT O and TV (O) at the same time to return to the previous menu or exit the TV’s menu while the menu is displayed on the TV screen.
R
V/v/B/b
After pressing AMP MENU (E), DVD MENU (H), or MENU (M), press V, v, B or b to select the settings. Then, press to enter the selection for DVD MENU or MENU.Press also to enter the selection of the receiver, VCR, satellite tuner, Blu-ray disc player or DVD player.
S DISPLAY Press to select the information displayed on the TV screen of the VCR, satellite tuner, CD player, Blu-ray disc player or DVD player. Press DISPLAY and TV (O) at the same time to select TV information displayed on the TV screen.
T -/-- Press -/-- and TV (O) at the same time to select the channel entry mode, either one or two digits of the TV.
>10/x Press to select track numbers over 10 of the VCR, satellite tuner or CD player or to select channel numbers of the Digital CATV terminal.
CLEAR Press to clear a mistake when you press the incorrect numeric buttons.
Name Function
U Numeric buttons (number 5*)
Press to preset/tune to preset stations or to select track numbers of the CD player, Blu-ray disc player or DVD player or to select channel numbers of the VCR or satellite tuner. Press 0/10 to select track number 10. Press the numeric buttons and TV (O) at the same time to select the TV channels.
V AUTO CAL Press to activate the Auto Calibration function.
W TV INPUT Press TV INPUT and TV (O) at the same time to 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 automatically.
10
STR-K685SECTION 2TEST MODE
SOUND FIELD CLEAR MODEThe preset sound field is cleared when this mode is activated. Usethis mode before returning the product to clients upon completionof repair.Procedure:
1. While depressing the 2CH button, press the power ?/1button to turn on the main power.
2. The message “S.F. CLR.” appears and initialization isperformed. (3 second)
SOFTWARE VERSION DISPLAY MODEThe software version is displayed.Procedure:
1. While depressing the DIMMER and the AUTO CAL buttonssimultaneously, press the power ?/1 button to turn on themain power.
2. The model name, destination and the software version aredisplayed. (8 second)
KEY CHECK MODEButton checkProcedure:
1. While depressing the MUSIC and the AUTO CAL buttonssimultaneously, press the power ?/1 button to turn on themain power.“REST 08” appears.
2. Every pressing of any button other than ?/1 counts downthe buttons. The buttons which are already counted once arenot counted again.
3. When all buttons are pressed “REST 00” appears.
FLUORESCENT INDICATOR TUBE TEST MODEAll fluorescent segments are tested. When this test is activated, allsegments turn on at the same time, then each segment turns on oneafter another.Procedure:
1. While depressing the SLEEP and the AUTO CAL buttonssimultaneously, press the power ?/1 button to turn on themain power.
2. All segments turn on.
3. Turn the INPUT SELECTOR dial.
4. Turn the INPUT SELECTOR dial once again.
5. Turn the INPUT SELECTOR dial once again. All segmentsturn off.
6. Every turning of the INPUT SELECTOR dial turns on eachsegment one after another in the same order.
SWAP ALL MODEThe signal will be swapped to all channels so that all speakers willhave sound output.Procedure:
1. While depressing the DIMMER and the DISPLAY buttonssimultaneously, press the power ?/1 button to turn on themain power.
2. “SWP. ALL” appears. (No change while displayed.)
SHIPMENT MODEAll preset contents are reset to the default setting.Procedure:
1. While depressing the SLEEP and the DISPLAY buttonssimultaneously, press the power ?/1 button to turn on themain power.
2. “CLEARED” appears and switch off the set.
PROTECTORIf an error occurs, the “Protector Display” will flash for a while andthe power is turned OFF.Procedure:
1. While depressing the MOVIE and the DISPLAY buttonssimultaneously, press the power ?/1 button to turn on themain power.
2. “PROT. EVER” appears (3 seconds) and the display returnsto the “Protector Display” and the power remains ON.
AM CHANNEL STEP 9 kHz/10 kHzSELECTION MODEEither the 9 kHz step or 10 kHz step can be selected for the AMchannel step.Procedure:
1. Set the FUNCTION to AM. Turn off the main power.2. While depressing the MOVIE 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.
VACS CONTROLThe VACS feature of the amplifier is turned off purposely.Procedure:
1. While depressing the MOVIE and the AUTO CAL buttonssimultaneously, press the power ?/1 button to turn on themain power.
2. “VACS OFF” appears. (8 second)
MEMORY
L C RSL S SR
SB SBRSBL
SW LFE SP ASP B
CATNEO:6 SAT D.RANGE
RDS STMONO
DTS-ES 96 / 24HDMI COAX
D EX; OPT;PL II x ;PL
dBk Hzmft.MHz
LFESP B NEO:6 D.RANGE MONOCOAX
kmMHz
RDSx
MEMORY
CSL SR
SB SBRSBL
SW CATDTSD; ;PL
dBHzft.
ST
11
STR-K685
DCAC FACTORY TEST MODEDCAC Factory Test mode have two stages:
1. DCAC DSP Data Line Checking2. DCAC board Checking
Factory Test System Setup
1. When power off :Press the three buttons MUSIC + DISPLAY + ?/1 .“DCAC[]FTM” appears.Afterward, press the DIMMER to start DCAC factory testmode.
1.DCAC DSP Data Line CheckingAfter press the DIMMER , DCAC Factory test mode will start,below display will show:
“DCAC[][][]x” x = 1, 2, 3If there is error happen, below display will show:
“ERR[]SD0x” x = 1 → D1501 or R1530x = 2 → D1502 problemx = 3 → D1503 problem
2.DCAC board CheckingConnect front left speaker of the receiver and AUTO CALmicrophone. Turn MASTER VOLUME jog, there will be test tonesound output from front left speaker, and the display will changeaccordingly.
“AD[]-[]xxx” xxx = 0 to 255 (depends on loudness of test tone)
DSP Data LineCheck
Start Pass PassAuto Cal MicCheck END
SPK Front Left
DCAC MIC
Receiver
12
STR-K685SECTION 3
ELECTRICAL ADJUSTMENT
[FM Auto Stop Check]
Procedure:1. Turn the power on.2. Input the following signal from Signal Generator to FM
antenna input directly.
* Carrier Freq : A = 87.5 MHz, B = 98 MHz, C = 108 MHzDeviation : 75 kHzModulation : 1 kHzANT input : 35 dBu (EMF)
Note: Please use 75 ohm “coaxial cable” to connect SG and the set. Youcannot use video cable for checking.Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal withautomatic scanning.
4. Confirm that input Frequency of A, B and C are detected andautomatic scanning stops.
The stop of automatic scanning means “The station signal is receivedin good condition.”
TUNER SECTION
generator
OUT (75 Ω)SET
1313
STR-K685
STR-K685
• Circuit Boards Location
SECTION 4DIAGRAMS
For Schematic Diagrams.Note:• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics andtantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
• A : B+ Line.• B : B– Line.• Voltages and waveforms are dc with respect to ground un-
der 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 productiontolerances.
• Waveforms are taken with a oscilloscope.• Circled numbers refer to waveforms.• Signal path.F : FMJ : ANALOGc : DIGITAL
• AbbreviationAR : Argentine modelE51 : Chilean and Peruvian modelsMX : Mexican modelSP : Singapore modelSP6 : Singapore and Malaysia modelsTH : Thai model
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.
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.
C
B
These are omitted.
E
Q
B
These are omitted.
C E
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.(In addition to this, the necessary note is printed in each block.)
• Waveforms
– DIGITAL Board –
1 IC1905 9 (MCLK1)
1 V/DIV, 40 ns/DIV72 ns
3.5 Vp-p
2 IC1101 id (X1)
1 V/DIV, 20 ns/DIV41.6 ns
4.2 Vp-p
3 IC1301 ws (XIN)
1 V/DIV, 40 ns/DIV81.4 ns
4.2 Vp-p
Note: The components identified by mark 0 or dottedline with mark 0 are critical for safety.Replace only with part number specified.
DIGITAL board
MAIN boardDISPLAY board
HEADPHONE board
POWER board
DCAC board
STANDBY boardAC SELECT board (E51)
Ver. 1.2
1414
STR-K685
STR-K685
4-1. BLOCK DIAGRAM – MAIN SECTION –
• Signal Path
: FM
: ANALOG
: DIGITAL
• R-CH is omitted due to same as L-CH.
AUDIO IN
AUDIO IN
AUDIO IN
PROCESSOR
INL36
49LOUT
INL44
INL52
40SLOUT
33COUT
DATA24
CLOCK25
59
VOL
IC_C
L
SDA
SCL
60
VO IC
L_DA
SYSTEM CONTROLIC1101(1/2)
VIDEO 2/BD IN
DVDIN
J1301
3 5 6 2IC1303
DIGITAL AUDIOI/F RECEIVER
IC1301
L
DISPLAY/POWERSECTION
DIN25
DOUT35
DI36
CLK38
CE37
ERROR34
XSTATE17
XMODE48
13CK OUT
20XMCK
14BCK
15LRCK
16DATAO
IC1303
X130112.288MHz
AUDIO DSPIC1905
KFSI0
SYSCLK
LRCKBCK
DOUT
22
15
10
11
12
SDI230
HCLK34
HCS36
HACN32
PM113XRST2
23SDO1
24SDO2
25SDO3
BCKI229
LRCKI228
LRCKI115BCKI117
IC1502
SRAM
AUDIO CODECIC1452
AD CONVERTERIC1401
SCKI38
RST37
ML36
MC35
MDI34
MDO33
10VOUT5BCK40
LRCK41
DATA347
DATA145
DATA246
14VOUT1
12VOUT3
11VOUT4
ANALOG SOUND
27AVCC
26DVDD
SL
ADIFL13
LIN16
19
20
21
SL
C
32SWOUT SW
SLIN
CIN
SWIN
A
98 97 95 96 99 100 94 1
DO DI
CLK CE
ERRO
R
XSTA
TE
CKSE
L1
DATA
0
3
BST
20
HCLK
4
HCS
5
HACN
7PM
92
BST_
SEL
6XR
ST10
PCM
1609
/180
3_RS
T
12
PCM
1609
_ML
13
PCM
1609
_MC
14
PCM
1609
_MDI
15
PCM
1609
_MDO
5 6
29 30
J400
INL28SA-CD/CD
SAT
TV
OPTICALIN
IC1351
DIN03
22 21XIN XOUT
12 9
93
XMOD
E
CKSEL147
GP968
HDOUT35
HDIN33
2
GP9
18
HD O
UT
19
HD IN
8
GP12
GP1237
MCLK1MCLK2
X150213.9MHz
14SCKOUT
1LIN
7PDWN
20BCKO
19LRCKO18 SDI1
24AUDIO GP869
EXLOCK59
INL110
TUNER PACK
FM75Ω
COAXIAL
AM
R-CH
DI
DO/SD/ST
CLK
CE
FM
AM
R CH
L CH
TUNER +10V10V
DO/S
D/ST
73
SLAT
CH
74
TUNE
R_DA
TA
47
TUNE
R_CL
K
46
OPTICAL
DIGITAL
COAXIAL
D1301
IC400
SDA SCL
EEPROM
IC1131
IC502WOOFER AMP
3 7
IC1503SELECTOR
1
6
5562
A
BBST
S
Y
ANTENNA
(Page 15)
BDISPLAY/POWERSECTION
(Page 15)
57
ADCC
_INT
D1501-1503
+3.3VREG
+7V
Q471
VIDEO 1 IN/PORTABLE AUDIO IN/
AUTO CAL MIC
J2000R-CH
AUTO CAL MIC
1515
STR-K685
STR-K685
4-2. BLOCK DIAGRAM – DISPLAY/POWER SECTION –
• R-CH is omitted due to same as L-CH.• Signal Path
: FM
IN28
12+V OUT2
POWER AMPIC501
POWER AMPIC601
9NF2
LIMITERQ501,502
11-V OUT2
IN2
12+V OUT2
9NF2
11-V OUT2
BOOSTERQ503
BOOSTERQ504 CURRENT
DETECT
Q505,506
AF POWERPROTECT
Q507
LIMITERQ601,602
BOOSTERQ603
BOOSTERQ604 CURRENT
DETECT
Q605,606
IN28
12+V OUT2
POWER AMPIC701
9NF2
LIMITERQ701,702
11-V OUT2
BOOSTERQ703
BOOSTERQ704 CURRENT
DETECT
Q705,706
2+V OUT1
5NF1
LIMITERQ751,752
3-V OUT1
BOOSTERQ753
BOOSTERQ754 CURRENT
DETECT
Q755,756
D1001
PROTECTSWITCH
Q881-883
RELAYDRIVE
Q509RY502
RELAYDRIVE
Q608RY551
D1111
RY601
D1110
RELAYDRIVE
Q708RY701
D1107
L
R
R
L
R-CH
R-CH
SR-CH
R-CH
R-CH
SR-CH
SR-CH
R-CH
R-CHPHONES
TM602(1/2)
61
PROT
ECTO
R
62HP
_RY
66FR
ONT_
A_RY
/DG5
1_FB
69
C/RE
AR/S
B_RY
RV102
ENCODER3 2
VOL_
ENCO
DER(
B)
64
VOL_
ENCO
DER(
A)
65
POW
ER_K
EY
56
?/1
S152
77RSTX
48STOP54 SIRCS
63FUSE DETECT
REMOTECONTROLRECEIVER
1
IC102
D910-913
RY901
D915D914
RELAYDRIVE
Q901
D920-923
23VCC5
84VCC3
-7VREG
3 2
+7VREG
1 3AUDIO+7V
IC821
IC822
POWER_RY 58
RELAY+B
D804-807
82
83
X0
X1
X110124MHz
F1
F2
L
SLSL
C
A
IN16SW
J790
FLUORESCENTINDICATOR TUBE
FL101
9
FL_L
AT
7 DIN
8 CLK
9 STB
16
FL_C
LK
17
FL_D
ATA
14
2931
SEG1-17
42
32GRID1-11
F1F2
FL DRIVEIC100
ADCC
38
DC-C
ONTR
OL
68
S114-119
FUNCTIONKEY
A/D1
39
FUNCTIONKEY
A/D2
40
S103,104
SYSTEM CONTROLIC1101(2/2)
AF POWERPROTECT
Q607
AF POWERPROTECT
Q707
FRONT
SURROUND
55
HP_D
ETEC
T
BUFFERIC101
35AVCC
36AVRH
+3.3VREG
3 1
IC1904
AUDIO-7V
+10VREG
3 1TUNER+10V
IC1902
T901
Q911AC DET
1 2
IC1111
D811
R803
+B
-B
-BSWITCH
Q851,852
-20V REGQ801FL101
-20V
POWER AMP-B
+5VREG
3 1
IC1031
PROTECTDET
2 7
IC850
+5V
+2.5VREG
5+2.5V
+3.3VREG
24
IC1901
+3.3V
+5VREG
3 1
IC1001AUDIO
+5V
SPEAKERS
(IMPEDANCE USE 6-16Ω)
SPEAKERS
(IMPEDANCE USE 6-16Ω)
SPEAKERS
(IMPEDANCE USE 6-16Ω)
SPEAKERS
(IMPEDANCE USE 10-16Ω)
MASTERVOLUME
RV101
ENCODER3 2
ENC_
B32
ENC_
A
31
INPUTSELECTOR
8
RESET
5 1
IC2000
AMP
+3.3V(STBY)
MAINSECTION
CENTER
SUBWOOFER
(Page 14)
BMAINSECTION
(Page 15)
AUTO CAL MIC
+7V
TM605(1/2)
TM602(2/2)
TM605(2/2)
DCCONTROL
Q2001,2002
VACSCONTROL
D841
R-CH
45
VAX
CTRL
ACIN
T902
F901
VOLTAGESELECT
S901E51
EXCEPT E51
1616
STR-K685
STR-K685
4-3. PRINTED WIRING BOARD – DIGITAL BOARD (SIDE A) – :Uses unleaded solder.• See page 13 for Circuit Boards Location.
0Q503 6-702-390-01 IC MN2488-OPY-MK0Q504 6-702-391-01 IC MP1620-OPY-MK0Q553 6-702-390-01 IC MN2488-OPY-MK
0Q554 6-702-391-01 IC MP1620-OPY-MK0Q603 6-702-390-01 IC MN2488-OPY-MK0Q604 6-702-391-01 IC MP1620-OPY-MK0Q653 6-702-390-01 IC MN2488-OPY-MK0Q654 6-702-391-01 IC MP1620-OPY-MK
0Q703 6-702-390-01 IC MN2488-OPY-MK0Q704 6-702-391-01 IC MP1620-OPY-MK0Q753 6-702-390-01 IC MN2488-OPY-MK0Q754 6-702-391-01 IC MP1620-OPY-MK0T901 1-443-918-11 POWER TRANSFORMER (SP, SP6, AR, TH)
0T901 1-443-919-11 POWER TRANSFORMER (E51)0T901 1-443-920-11 POWER TRANSFORMER (MX)
A-1221-896-A DIGITAL BOARD, COMPLETE (SP, SP6, TH)A-1221-905-A DIGITAL BOARD, COMPLETE (E51)A-1221-915-A DIGITAL BOARD, COMPLETE (AR)A-1249-608-A DIGITAL BOARD, COMPLETE (MX)
JR1002 1-211-950-11 SHORT CHIP 0JR1005 1-216-864-11 SHORT CHIP 0JR1008 1-216-864-11 SHORT CHIP 0JR1009 1-211-950-11 SHORT CHIP 0JR1010 1-211-950-11 SHORT CHIP 0
JR1020 1-216-864-11 SHORT CHIP 0JR1511 1-400-862-11 BEAD, FERRITE
< RESISTOR >
R1010 1-216-809-11 METAL CHIP 100 5% 1/10WR1011 1-216-809-11 METAL CHIP 100 5% 1/10WR1012 1-216-809-11 METAL CHIP 100 5% 1/10W
R1013 1-216-809-11 METAL CHIP 100 5% 1/10WR1014 1-216-809-11 METAL CHIP 100 5% 1/10W
R1015 1-216-809-11 METAL CHIP 100 5% 1/10WR1035 1-216-825-11 METAL CHIP 2.2K 5% 1/10WR1039 1-216-833-11 METAL CHIP 10K 5% 1/10WR1041 1-216-809-11 METAL CHIP 100 5% 1/10WR1042 1-216-809-11 METAL CHIP 100 5% 1/10W
R1049 1-216-833-11 METAL CHIP 10K 5% 1/10WR1061 1-216-809-11 METAL CHIP 100 5% 1/10WR1062 1-216-809-11 METAL CHIP 100 5% 1/10WR1065 1-216-809-11 METAL CHIP 100 5% 1/10WR1066 1-216-809-11 METAL CHIP 100 5% 1/10W
R1067 1-216-809-11 METAL CHIP 100 5% 1/10WR1068 1-216-809-11 METAL CHIP 100 5% 1/10WR1072 1-216-827-11 METAL CHIP 3.3K 5% 1/10WR1073 1-216-827-11 METAL CHIP 3.3K 5% 1/10WR1076 1-216-809-11 METAL CHIP 100 5% 1/10W
R1077 1-216-809-11 METAL CHIP 100 5% 1/10WR1078 1-216-809-11 METAL CHIP 100 5% 1/10WR1083 1-216-833-11 METAL CHIP 10K 5% 1/10WR1084 1-216-809-11 METAL CHIP 100 5% 1/10WR1088 1-216-833-11 METAL CHIP 10K 5% 1/10W
R1094 1-216-833-11 METAL CHIP 10K 5% 1/10WR1095 1-216-833-11 METAL CHIP 10K 5% 1/10WR1096 1-216-833-11 METAL CHIP 10K 5% 1/10WR1105 1-216-833-11 METAL CHIP 10K 5% 1/10WR1106 1-216-809-11 METAL CHIP 100 5% 1/10W
R1107 1-216-825-11 METAL CHIP 2.2K 5% 1/10WR1108 1-216-825-11 METAL CHIP 2.2K 5% 1/10WR1110 1-216-825-11 METAL CHIP 2.2K 5% 1/10WR1111 1-216-825-11 METAL CHIP 2.2K 5% 1/10WR1112 1-216-809-11 METAL CHIP 100 5% 1/10W
R1114 1-216-825-11 METAL CHIP 2.2K 5% 1/10WR1117 1-216-821-11 METAL CHIP 1K 5% 1/10WR1118 1-216-821-11 METAL CHIP 1K 5% 1/10WR1120 1-216-821-11 METAL CHIP 1K 5% 1/10WR1121 1-216-809-11 METAL CHIP 100 5% 1/10W
R1122 1-216-809-11 METAL CHIP 100 5% 1/10WR1123 1-216-809-11 METAL CHIP 100 5% 1/10WR1124 1-216-809-11 METAL CHIP 100 5% 1/10WR1125 1-216-809-11 METAL CHIP 100 5% 1/10WR1126 1-216-809-11 METAL CHIP 100 5% 1/10W
R1127 1-216-809-11 METAL CHIP 100 5% 1/10WR1128 1-216-809-11 METAL CHIP 100 5% 1/10WR1129 1-216-809-11 METAL CHIP 100 5% 1/10WR1134 1-216-809-11 METAL CHIP 100 5% 1/10WR1135 1-216-809-11 METAL CHIP 100 5% 1/10W
R1140 1-216-809-11 METAL CHIP 100 5% 1/10WR1143 1-216-809-11 METAL CHIP 100 5% 1/10WR1144 1-216-809-11 METAL CHIP 100 5% 1/10WR1150 1-216-809-11 METAL CHIP 100 5% 1/10WR1151 1-216-809-11 METAL CHIP 100 5% 1/10W
R1152 1-216-809-11 METAL CHIP 100 5% 1/10WR1153 1-216-809-11 METAL CHIP 100 5% 1/10WR1154 1-216-809-11 METAL CHIP 100 5% 1/10WR1156 1-216-864-11 SHORT CHIP 0R1157 1-216-864-11 SHORT CHIP 0
DIGITAL
44
STR-K685
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
R1159 1-216-827-11 METAL CHIP 3.3K 5% 1/10WR1160 1-216-809-11 METAL CHIP 100 5% 1/10WR1161 1-216-809-11 METAL CHIP 100 5% 1/10WR1163 1-216-841-11 METAL CHIP 47K 5% 1/10WR1164 1-216-833-11 METAL CHIP 10K 5% 1/10W
R1175 1-216-809-11 METAL CHIP 100 5% 1/10WR1179 1-216-833-11 METAL CHIP 10K 5% 1/10WR1180 1-216-833-11 METAL CHIP 10K 5% 1/10WR1181 1-216-833-11 METAL CHIP 10K 5% 1/10WR1182 1-216-833-11 METAL CHIP 10K 5% 1/10W
R1183 1-216-833-11 METAL CHIP 10K 5% 1/10WR1184 1-216-833-11 METAL CHIP 10K 5% 1/10WR1185 1-216-833-11 METAL CHIP 10K 5% 1/10WR1186 1-216-833-11 METAL CHIP 10K 5% 1/10WR1187 1-216-833-11 METAL CHIP 10K 5% 1/10W
R1188 1-216-833-11 METAL CHIP 10K 5% 1/10WR1189 1-216-833-11 METAL CHIP 10K 5% 1/10WR1190 1-216-833-11 METAL CHIP 10K 5% 1/10WR1191 1-216-833-11 METAL CHIP 10K 5% 1/10WR1192 1-216-833-11 METAL CHIP 10K 5% 1/10W
R1193 1-216-837-11 METAL CHIP 22K 5% 1/10W(AR, MX)
R1193 1-216-841-11 METAL CHIP 47K 5% 1/10W(SP, SP6, E51, TH)
R1194 1-216-829-11 METAL CHIP 4.7K 5% 1/10W(SP, SP6, TH)
R1194 1-216-837-11 METAL CHIP 22K 5% 1/10W(E51)
R1194 1-216-841-11 METAL CHIP 47K 5% 1/10W(AR, MX)
R1201 1-216-837-11 METAL CHIP 22K 5% 1/10WR1253 1-216-833-11 METAL CHIP 10K 5% 1/10WR1260 1-216-821-11 METAL CHIP 1K 5% 1/10WR1261 1-216-821-11 METAL CHIP 1K 5% 1/10WR1301 1-216-830-11 METAL CHIP 5.6K 5% 1/10W
R1302 1-216-829-11 METAL CHIP 4.7K 5% 1/10WR1303 1-216-839-11 METAL CHIP 33K 5% 1/10WR1304 1-216-809-11 METAL CHIP 100 5% 1/10WR1305 1-216-819-11 METAL CHIP 680 5% 1/10WR1306 1-216-801-11 METAL CHIP 22 5% 1/10W
R1307 1-216-809-11 METAL CHIP 100 5% 1/10WR1308 1-216-809-11 METAL CHIP 100 5% 1/10WR1309 1-216-809-11 METAL CHIP 100 5% 1/10WR1310 1-216-857-11 METAL CHIP 1M 5% 1/10WR1311 1-216-809-11 METAL CHIP 100 5% 1/10W
R1312 1-216-809-11 METAL CHIP 100 5% 1/10WR1313 1-216-809-11 METAL CHIP 100 5% 1/10WR1314 1-216-833-11 METAL CHIP 10K 5% 1/10WR1318 1-216-833-11 METAL CHIP 10K 5% 1/10WR1319 1-216-864-11 SHORT CHIP 0
R1321 1-216-864-11 SHORT CHIP 0R1323 1-216-833-11 METAL CHIP 10K 5% 1/10WR1325 1-216-864-11 SHORT CHIP 0R1351 1-216-809-11 METAL CHIP 100 5% 1/10WR1355 1-218-285-11 METAL CHIP 75 5% 1/10W
R1356 1-216-817-11 METAL CHIP 470 5% 1/10WR1357 1-216-841-11 METAL CHIP 47K 5% 1/10WR1359 1-216-809-11 METAL CHIP 100 5% 1/10WR1360 1-216-809-11 METAL CHIP 100 5% 1/10W
R1400 1-216-864-11 SHORT CHIP 0
R1401 1-216-809-11 METAL CHIP 100 5% 1/10WR1403 1-216-864-11 SHORT CHIP 0R1404 1-216-864-11 SHORT CHIP 0R1405 1-216-864-11 SHORT CHIP 0R1406 1-216-864-11 SHORT CHIP 0
R1407 1-216-809-11 METAL CHIP 100 5% 1/10WR1408 1-216-864-11 SHORT CHIP 0R1409 1-216-864-11 SHORT CHIP 0R1410 1-216-817-11 METAL CHIP 470 5% 1/10WR1411 1-216-817-11 METAL CHIP 470 5% 1/10W
R1425 1-216-864-11 SHORT CHIP 0R1426 1-216-821-11 METAL CHIP 1K 5% 1/10WR1435 1-216-864-11 SHORT CHIP 0R1436 1-216-821-11 METAL CHIP 1K 5% 1/10WR1445 1-216-864-11 SHORT CHIP 0
R1446 1-216-821-11 METAL CHIP 1K 5% 1/10WR1455 1-216-864-11 SHORT CHIP 0R1460 1-216-864-11 SHORT CHIP 0R1461 1-216-864-11 SHORT CHIP 0R1464 1-216-864-11 SHORT CHIP 0
R1466 1-216-821-11 METAL CHIP 1K 5% 1/10WR1469 1-216-809-11 METAL CHIP 100 5% 1/10WR1470 1-216-864-11 SHORT CHIP 0R1471 1-216-864-11 SHORT CHIP 0R1472 1-216-864-11 SHORT CHIP 0
R1474 1-216-833-11 METAL CHIP 10K 5% 1/10WR1475 1-216-864-11 SHORT CHIP 0R1476 1-216-821-11 METAL CHIP 1K 5% 1/10WR1484 1-216-864-11 SHORT CHIP 0R1486 1-216-821-11 METAL CHIP 1K 5% 1/10W
R1491 1-216-864-11 SHORT CHIP 0R1492 1-216-864-11 SHORT CHIP 0R1493 1-216-864-11 SHORT CHIP 0R1494 1-216-864-11 SHORT CHIP 0R1495 1-216-864-11 SHORT CHIP 0
R1501 1-216-809-11 METAL CHIP 100 5% 1/10WR1502 1-216-809-11 METAL CHIP 100 5% 1/10WR1503 1-216-813-11 METAL CHIP 220 5% 1/10WR1504 1-216-809-11 METAL CHIP 100 5% 1/10WR1505 1-216-809-11 METAL CHIP 100 5% 1/10W
R1506 1-216-809-11 METAL CHIP 100 5% 1/10WR1508 1-216-809-11 METAL CHIP 100 5% 1/10WR1509 1-216-809-11 METAL CHIP 100 5% 1/10WR1510 1-216-809-11 METAL CHIP 100 5% 1/10WR1511 1-216-809-11 METAL CHIP 100 5% 1/10W
R1512 1-216-833-11 METAL CHIP 10K 5% 1/10WR1513 1-216-833-11 METAL CHIP 10K 5% 1/10WR1514 1-216-833-11 METAL CHIP 10K 5% 1/10WR1515 1-216-857-11 METAL CHIP 1M 5% 1/10WR1523 1-216-813-11 METAL CHIP 220 5% 1/10W
R1524 1-216-864-11 SHORT CHIP 0R1530 1-216-845-11 METAL CHIP 100K 5% 1/10WR1541 1-216-813-11 METAL CHIP 220 5% 1/10WR1555 1-216-813-11 METAL CHIP 220 5% 1/10WR1556 1-216-809-11 METAL CHIP 100 5% 1/10W
R1557 1-216-813-11 METAL CHIP 220 5% 1/10W
DIGITALVer. 1.2
45
STR-K685
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
DISPLAY
R1570 1-216-833-11 METAL CHIP 10K 5% 1/10WR1571 1-216-833-11 METAL CHIP 10K 5% 1/10WR1572 1-216-833-11 METAL CHIP 10K 5% 1/10WR1573 1-216-833-11 METAL CHIP 10K 5% 1/10W
R1574 1-216-833-11 METAL CHIP 10K 5% 1/10WR1635 1-216-833-11 METAL CHIP 10K 5% 1/10WR1636 1-216-833-11 METAL CHIP 10K 5% 1/10WR1943 1-216-841-11 METAL CHIP 47K 5% 1/10WR1946 1-216-809-11 METAL CHIP 100 5% 1/10W
R1947 1-216-801-11 METAL CHIP 22 5% 1/10WR1948 1-216-809-11 METAL CHIP 100 5% 1/10W
J790 1-815-314-21 JACK (PHONES)*************************************************************
A-1221-893-A MAIN BOARD, COMPLETE (SP, SP6, TH)A-1221-900-A MAIN BOARD, COMPLETE (E51)A-1221-912-A MAIN BOARD, COMPLETE (AR)A-1249-599-A MAIN BOARD, COMPLETE (MX)
0Q504 6-702-391-01 IC MP1620-OPY-MK0Q553 6-702-390-01 IC MN2488-OPY-MK0Q554 6-702-391-01 IC MP1620-OPY-MK0Q603 6-702-390-01 IC MN2488-OPY-MK0Q604 6-702-391-01 IC MP1620-OPY-MK
0Q653 6-702-390-01 IC MN2488-OPY-MK0Q654 6-702-391-01 IC MP1620-OPY-MK0Q703 6-702-390-01 IC MN2488-OPY-MK0Q704 6-702-391-01 IC MP1620-OPY-MK0Q753 6-702-390-01 IC MN2488-OPY-MK
0Q754 6-702-391-01 IC MP1620-OPY-MK0T901 1-443-918-11 POWER TRANSFORMER (SP, SP6, AR)0T901 1-443-919-11 POWER TRANSFORMER (E51)
STANDBYVer. 1.2
51
STR-K685
MEMO
STR-K685
REVISION HISTORY
Clicking the version allows you to jump to the revised page.Also, clicking the version at the top of the revised page allows you to jump to the next revised page.
Ver. Date Description of Revision
1.0 2007.04 New
1.1 2007.06 Addition of SP6 (Singapore and Malaysia models) model