Sony STR-KS370 - A/v Receiver User manual

SERVICE MANUAL
Sony Corporation
Audio & Video Business Group
Published by Sony EMCS (Malaysia) PG Tec
STR-KS370
SPECIFICATIONS
AV RECEIVER
9-890-531-01
2010A08-1
© 2010.01
US Model
Ver. 1.0 2010.01
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.
** Manufactured under license under U.S. Patent
#’s: 5,451,942; 5,956,674; 5,974,380;
5,978,762; 6,487,535 & other U.S. and
worldwide patents issued & pending. DTS and
DTS Digital Surround are registered trademarks
and the DTS logos and Symbol are trademarks of
DTS, Inc. © 1996-2008 DTS, Inc. All Rights
Reserved.
This receiver incorporates High-Definition
Multimedia Interface (HDMITM) technology.
HDMI, the HDMI logo and High-Definition
Multimedia Interface are trademarks or registered
trademarks of HDMI Licensing LLC in the
United States and other countries.
“x.v.Color” and “x.v.Color”
Sony Corporation.
“BRAVIA” is a trademark of Sony Corporation.
“PlayStation” is a registered trademark of Sony
Computer Entertainment Inc.
“S-AIR” and its logo are trademarks of Sony
About area codes
The area code of the receiver you purchased is
shown on the upper left 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”.
FRONT R
SPEAKERS
FRONT L SUR R SUR L CENTER
SUBWOOFER
4-XXX-XXX-XX(X) AA
Area code
AUDIO POWER
SPECIFICATIONS
Amplifier section
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
(FTC)
(Models of area code US only)
FRONT L + FRONT R
With 3 ohm loads, both
channels driven, from 180
– 20,000 Hz; rated 84 watts
per channel minimum
RMS power, with no more
than 1% total harmonic
distortion from 250
milliwatts to rated output.
POWER OUTPUT (reference)
FRONT L/FRONT R/CENTER/SUR L/SUR R
167 W (per channel at 
3 ohms, 1 kHz)
SUBWOOFER 165 W (at 3 ohms, 60 Hz)
Inputs
Analog Sensitivity: 1 V/50 kohms
Digital (Coaxial) Impedance: 75 ohms
FM tuner section
Tuning range 87.5 – 108.0 MHz 
(100 kHz step)
Antenna FM wire antenna
Antenna terminals 75 ohms, unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
Antenna AM loop antenna
Intermediate frequency
450 kHz
Area code Tuning scale
10 kHz step 9 kHz step
US 530 –
1,710 kHz
531 –
1,710 kHz
Power requirements
Power output (DIGITAL MEDIA PORT)
DC OUT: 5 V, 0.7A MAX
Power consumption
Power consumption (during standby mode)
0.3 W (When Control for
HDMI and S-AIR standby
are set to off)
Dimensions (w/h/d) (Approx.)
17 in × 2 5/8 in × 12 1/8 in
(430 mm × 66.5 mm ×
306 mm)
including projecting parts
and controls
Mass (A
pp
rox.) 7 lb 8 oz (3.4 k
g
)
Area code Power requirements
US 120 V AC, 60 Hz
Area code Power consumption
US 110 W
Design and specifications are subject to
change without notice.
Halogenated flame retardants are not used in
the certain printed wiring boards.
General

STR-KS370
2
TABLE OF CONTENTS
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples
of a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2 V AC range are suitable. (See
Fig. A)
1.5 kΩ0.15 μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
NOTES ON CHIP COMPONENT REPLACEMENT
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
1. SERVICING NOTES .............................................. 3
2. DISASSEMBLY......................................................... 4
2-1. Disassembly Flow........................................................... 4
2-2. Case................................................................................. 4
2-3. S-AIR Board ................................................................... 5
2-4. Tuner (FM/AM), IO Board ............................................ 5
2-5. Front Panel Block ........................................................... 6
2-6. MAIN Board ................................................................... 6
3. TEST MODE ............................................................. 7
4. ELECTRICAL CHECK .......................................... 9
5. DIAGRAMS ................................................................ 10
5-1. Block Diagram - MAIN Section -................................... 11
5-2. Block Diagram - HDMI PC Section -............................. 12
5-3. Block Diagram - DSP/S-AIR Section - .......................... 13
5-4. Block Diagram- AMP Section -...................................... 14
5-5. Block Diagram - SMPS Section - ................................... 15
5-6. Printed Wiring Board
- MAIN Board (Component Side) -................................ 17
5-7. Printed Wiring Board
- MAIN Board (Conductor Side) -.................................. 18
5-8. Schematic Diagram - MAIN Board (1/5) -..................... 19
5-9. Schematic Diagram - MAIN Board (2/5) -..................... 20
5-10. Schematic Diagram - MAIN Board (3/5) -..................... 21
5-11. Schematic Diagram - MAIN Board (4/5) -..................... 22
5-12. Schematic Diagram - MAIN Board (5/5) -..................... 23
5-13. Printed Wiring Board- S-AIR and IO Board - ................ 24
5-14. Schematic Diagram - S-AIR Board -.............................. 24
5-15. Schematic Diagram - IO Board - .................................... 25
5-16. Printed Wiring Board - HDMI PC Board - ..................... 26
5-17. Schematic Diagram - HDMI PC Board (1/2) - ............... 27
5-18. Schematic Diagram - HDMI PC Board (2/2) - ............... 28
5-19. Printed Wiring Board - DISPLAY, IR, LED,
KEY FUNCTION and KEY POWER Board - .............. 29
5-20. Schematic Diagram - DISPLAY, IR, LED,
KEY FUNCTION and KEY POWER Board - ............... 30
5-21. Printed Wiring Board- SMPS Board - ............................ 31
5-22. Schematic Diagram - SMPS Board - .............................. 32
6. EXPLODED VIEWS ............................................... 43
6-1. Case, S-AIR Board Section ............................................ 43
6-2. Front Panel Section......................................................... 44
6-3. Chassis Section ............................................................... 45
7. ELECTRICAL PARTS LIST ............................... 46

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3
SECTION 1
SERVICING NOTES
UNLEADED SOLDER
Boards 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 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 viscous (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.
NOTE OF REPLACING THE IC3500 AND IC3501 ON
THE HDMI PC BOARD
IC3500 and IC3501 on the HDMI PC board cannot exchange with
single. When these parts on the HDMI PC board are damaged,
exchange the entire mounted board.

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4
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
Note: Follow the disassembly procedure in the numerical order given.
2-2. CASE
2-2. CASE
(Page 4)
2-4. TUNER (FM/AM), IO BOARD
(Page 5)
2-3. S-AIR BOARD
(Page 5)
2-6. MAIN BOARD
(Page 6)
2-5. FRONT PANEL BLOCK
(Page 6)
SET
1four screws
FLAT HEAD (TP)
7case
2one screw
FLAT HEAD (TP)
2one screw
FLAT HEAD (TP)
3
3
4Lift up the case
in the direction of arrow.
5two claws
6

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5
2-4. TUNER (FM/AM), IO BOARD
2-3. S-AIR BOARD
1wire (flat type) (9 core)
(CNS250)
5four screws
+BV3 (3-CR)
3two screws
+BV3 (3-CR)
7IO board
2wire (flat type) (25 core)
(CNS200)
6cushion saranet
4Tuner (FM/AM)
3two screws
+BV3 (3-CR)
1four screws
+BV3 (3-CR)
6card slot (SAIR)
2one screw
+BV3 (3-CR)
4connector (CN104)
5SAIR board

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6
2-5. FRONT PANEL BLOCK
2-6. MAIN BOARD
1wire (flat type) (13 core)
(CNS700)
2one screw
+BV3 (3-CR)
3three claws
4claw
6front panel block
4claw
5three claws
7heat sink (AMP)
8MAIN board
1wire (flat type) (19 core)
(CN1007)
3connector
(CN906)
4two screws
+BV3 (3-CR)
4two screws
+BV3 (3-CR)
6four screws
BVTP 3 x 14
5two screws
+BV3 (3-CR)
2connector
(CN904)

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7
SECTION 3
TEST MODE
1. COLD RESET
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. Press the [?/1] button on the set to turn the power on.
2. Keeps pressing the [?/1] button on the set for about five sec-
onds.
3. The message “CLEARED” appears, then the set turns off.
2. HOW TO ENTER THE TEST MODE
Note: The operation of the button of the following test modes is only a
remote commander.
Procedure:
1. Press the [?/1] button to turn the power on.
2. Press the buttons in order of [TUNER] [RETURN] Hold
SHIFT button ([ENTER] [0] [1] [0]) [SOUND
FIELD +]
3. The message “TEST MENU” appears, then enter the test
menu.
4. Press the [?/1] button to exit from the test mode.
3. PANEL TEST
3-1. Pattern check
Procedure:
1. Enter the test mode menu.
2. Press the []/[] buttons to select “PANEL”, and press the
[ENTER] button.
3. All segments and all LEDs turn on. Change as follows all on,
test pattern 1, test pattern 2 and test pattern 3, all on in this
order.
NIGHT SLEEP HDMI COAX OPT TUNED ST S-AIR ECO MUTINGAACLPCM
; TrueHD
; D + EX
; PL II x
DTS 96/24
-ES NEO:6
DTS -HDLBR
MSTR HI RES
NIGHT SLEEP HDMI COAX OPT TUNED ST S-AIR ECO MUTINGAACLPCM
; TrueHD
; D+ EX
; PL II x
DTS 96/24
-ES NEO:6
DTS -HDLBR
MSTRHI RES
TUNED STLPCM
; D EX
; PL II
DTS
NEO:6
DTS -HD
MSTR
3-2. Key check
Procedure:
1. Press the [VOLUME –] button, while executing pattern
check.
2. The message “K0 V0” appears. “K0” value increases when-
ever a button on the set is pressed. However, once a button has
been pressed, it is no longer taken into account. All buttons on
the set is pressed, “K3 V0” is displayed.
3. “V” value increases in the manner of 0, 1, 2, 3 ... [MASTER
VOLUME] knob is turned clockwise, or it decreases in the
manner of 0, 9, 8, 7 ... [MASTER VOLUME] knob is turned
counterclockwise.
4. Press the [?/1] button to exit from the test mode.
3-3. Software version and destination display
Procedure:
1. Press the [VOLUME +] button, while executing pattern
check.
2. The display of model name, destination, and software version
changes whenever [VOLUME +] button is pressed.
3. Press the [?/1] button to exit from the test mode.
4. AMP TEST
Not used for the servicing.
Press the [?/1] button if having entered this mode.
5. TUNER FACTORY PRESET
Not used for the servicing.
Press the [?/1] button if having entered this mode.
6. VACS DISPLAY
Procedure:
1. Enter the test mode menu.
2. Press the []/[] buttons to select “VACS DISP”, and press the
[ENTER] button.
3. It will appear the VACS status
7. VACS ON/OFF
Procedure:
1. Enter the test mode menu.
2. Press the []/[] buttons to select “VACS ON OFF”, and press
the [ENTER] button.
3. The VACS status will change.
8. DSP HALT MODE
Not used for the servicing.
Press the [?/1] button if having entered this mode.
9. DSP STATUS DISPLAY
Not used for the servicing.
Press the [?/1] button if having entered this mode.
10. HDMI UCOM UPDATE
Procedure:
1. Enter the test mode menu.
2. Press the []/[] buttons to select “HDMI VER”, and press the
[ENTER] button.
3. HDMI MICOM software version is displayed.
4. Press the [?/1] button to exit from the test mode.
11. HDMI THROUGH DMPORT UPDATE
Procedure:
1. Enter the test mode menu.
2. Press the []/[] buttons to select “HDMI UPD”, and press the
[ENTER] button.
3. Connect the programming jig to dmport connection.
4. Flash HDMI software from computer through programming
jig.
5. Press the [?/1] button to exit from the test mode.
12. DMPORT TEST
Procedure:
1. Connect the DMPORT check jig (Part No. J-2501-309-A) with
the DMPORT jack (CN1701) on the MAIN board.
2. Press the [?/1] button to turn the power on.
3. Confirm that both LEDs of the DMPORT check jig lights.
(Confirmation the power supply line)
4. Press the [DMPORT] button to select the “DMPORT”.
5. Enter the test mode menu.
6. Press the []/[] buttons to select the “DMPORT CHK”, and
press the [ENTER] button.
7. The message “DMPORT OK.” appears on the fluorescent indi-
cator tube and enter the digital media port test mode. (Confir-
mation of communication line)
When “NO DETECT” and “UART TO” are displayed on
the fluorescent indicator tube, confirm the connection of the
DMPORT check jig, and enter the mode again.
Each time the [>] button is pressed, the connect check and
adaptor version check are changed.
Press the [.] button, connected confirmation of the
DMPORT check jig is done again.
8. To a pin-jack of the DMPORT check jig input information rel-
evant to audio signal (sine-wave 1.0 Vrms).
9. Confirm the output of speakers. (Confirmation of analog sig-
nal)

STR-KS370
8
10. Press the [?/1] button to exit from the test mode.
AF
oscillator
DMPORT
check jig
(Part No.
J-2501-309-A)
J001
amplifier FL/FR
speakers
MAIN board
CN1701
MAIN board
TB2001, 2002
13. DMPORT DEVICE TEST
Note: It connects with the iPod adaptor and it is necessary to repair hard-
ness to execute this mode.
Procedure:
1. Connect the DMPORT check jig (Part No. J-2501-309-A) with
the DMPORT jack (CN1701) on the MAIN board.
2. Enter the test mode menu.
3. Press the []/[] buttons to select “DMPORT DEV”, and press
the [ENTER] button.
4. LED on the jig lights.
5. Press the [?/1] button to exit from the test mode.
14. S-AIR TEST MODE
Procedure:
1. Enter the test mode menu.
2. Press the []/[] buttons to select “SAIR TEST”, and press the
[ENTER] button.
3. S-AIR test menu is displayed.
4. Press the [?/1] button to exit from the test mode.
14-1. Power
Procedure:
1. Enter the S-AIR test mode.
2. Press the []/[] buttons to select “POWER”, and press the
[ENTER] button.
3. The messages “000 SET” is appears.
4. Press the []/[] buttons to select the output power. (OFF or
000 to 063)
5. Press the [ENTER] button, return to S-AIR test mode each
item.
14-2. NAMG
Procedure:
1. Enter the S-AIR test mode.
2. Press the []/[] buttons to select “NAMG”, and press the
[ENTER] button.
3. The messages “AUTO” is appears.
4. Press the []/[] buttons to select the NAMG setting value.
(107 to 117)
5. Press the [ENTER] button, return to S-AIR test mode each
item.
14-3. Version check
Procedure:
1. Enter the S-AIR test mode.
2. Press the []/[] buttons to select “VER. CHECK”, and press
the [ENTER] button.
3. MICOM software version of S-AIR product is displayed.
4. Press the [ENTER] button, return to S-AIR test mode each
item.
15. S-AIR TEST ELEC MODE
Not used for the servicing.
Press the [?/1] button if having entered this mode.
16. UART FLASH (SOURCE)
Not used for the servicing.
Press the [?/1] button if having entered this mode.
17. UART FLASH (TARGET)
Not used for the servicing.
Press the [?/1] button if having entered this mode.
18. COLD RESET
Procedure:
1. Enter the test mode menu.
2. Press the []/[] buttons to select “COLD RESET”, and press
the [ENTER] button.
3. The message “CLEARED” appears, then the set turns off.

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9
SECTION 4
ELECTRICAL CHECK
FM AUTO STOP CHECK
signal
generator
set
Procedure:
1. Turn on the set.
2. Input the following signal from signal generator to FM antenna
input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the set.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with
automatic scanning.
4. Confirm that input frequency of A, B and C are detected and
automatic scanning stops.
When the station signal is received in good condition, automatic
scanning stops.

STR-KS370
10
SECTION 5
DIAGRAMS
• Waveforms
– MAIN Board –
1IC1003 <zvc (XTAL)
500 mV/DIV, 20 ns/DIV
40 ns
1.1 Vp-p
2IC1005 qd (Xout)
2 V/DIV, 100 ns/DIV
200 ns
3.4 Vp-p
3IC1704 wa (XOUT(O))
2 V/DIV, 50 ns/DIV
81 ns
4 Vp-p
4IC2004 4(Y)
1 V/DIV, 10 ns/DIV
20.2 ns
2.6 Vp-p
5IC2000 qf (XFSOOUT)
1 V/DIV, 10 ns/DIV
20.2 ns
2.4 Vp-p
6IC2001 qf (XFSOOUT)
1 V/DIV, 10 ns/DIV
20.2 ns
2.4 Vp-p
7IC3500 4(XTALOUT)
1 V/DIV, 50 ns/DIV
8IC3000 qa (XOUT)
2 V/DIV, 50 ns/DIV
100 ns
3.5 Vp-p
q; Q701 (Collector)
5 V/DIV, 5 Ps/DIV
6.3 Ps
15.8 Vp-p
9Q701 (Base)
1 V/DIV, 5 Ps/DIV
6.2 Ps
3 Vp-p
100 ns
3.2 Vp-p
– HDMI PC Board – – DISPLAY Board –

STR-KS370
STR-KS370
1111
5-1. BLOCK DIAGRAM - MAIN Section -
EEPROM
IC1014
SYSTEM CONTROLLER
IC1005 (1/4)
DIGITAL OPTICAL
RECEIVER
IC203
22
DATA
23
CLK
TV L
5
SACD L
L CH
R CH
DO/ST/SD
DI
3
TUNER L
11
VinL
13
DIR_HDOUT
DAMP_SCDT/DIR_DIN
DAMP_SHIFT/DIR_CLK
DIR_HCE
DIR ERROR
DIR CSFLAG
DIR RST
DIR_XSTATE
DIR_ZERO
18
BD3842CLK
87
BD3842DATA
86
43
DATA_DIR, DOUT,
BCK, LRCK, CKOUT
DOUT
6
SCKI
9
BCK 8
LRCK 7
OUT L 14
DO 35
DI 36
CLK 38
CE 37
ERROR(O) 34
XMODE 48
XSTATE(O)
DIR_DO
DIR_ZERO
DIR_DIN
DIR_CLK
DIR_CE
ERR
DIR_RST
DIR_XSTATE
DIR_DO
DIR_ZERO
DIR_DIN
DIR_CLK
DIR_CE
ERR
DIR_RST
DIR_XSTATE
17
DATA(O) 16
BCK(O) 14
LRCK(O) 15
CKOUT
DATA_DIR
BCK
LRCK
DOUT
CKOUT
13
AUDIO(O) 24
TV OPT IN
DIGITAL OPTICAL
RECEIVER
IC202
SAT/CATV
OPT IN
DIGITAL AUDIO
INTERFACE RECEIVER
IC1704
J202
VIDEO
COAX IN
FM 75Ω
COAXIAL
45
41
40
DIGITAL
TV AUDIO IN
ANTENNA
J201
TUNER (FM/AM)
SA-CD/CD
AUDIO IN
AM
L
R
L
R
DMPORT L
9
R-CH
R-CH
ANALOG AUDIO
INPUT SELECTOR
IC212
A/D CONVERTER
IC1703
R-CH
21
22
X1700
12.288MHz
XOUT(O)
XIN(I)
FM ANT
GND
AM ANT
GND
CL
CE
ST_DI
ST_DO
ST_CLK
ST_CE
LINE AMP
IC1705
42
75
RDS DATA
RDS CLK
RDS_DATA
RDS CLK
44
TUNED_SD TUNED
13 15
Xout Xin
53
ROM_SDA
54
5 6
ROM_SCLK
X1001
5MHz
A
xSIGNAL PATH
: TUNER
: AUDIO (ANALOG)
: AUDIO (DIGITAL)
xR-ch is omitted due to same as L-ch.
DIGITAL AUDIO
INPUT SELECTOR
IC210
1C0
6
1C1
5
DIN0
3
1Y 7
2
B
14
A
TC74VHC153A
51
TC74VHC153B
66
AUTO
CAL MIC
J200
DCAC L
1
DCAC R
DCACON/OFF
11
CEC DATA
SWITCH
Q1006 – 1009
36
UCOM RX-HDMI_TX
UCOM TX-HDMI_RX 35
HDMI_RST
HTXD
HRXD
HRESET
94
22
CEC_DO
CEC_DI 3
AUDIO B
DIR_XSTATE, DIR_RERR
SAIR OUT L
C
CEC D
100 1 2 24 2769 10
HDMI_CNVSS
HDMI_CNVSS
61
HRESET,
HTXD, HRXD
E
: MIC
DIN2
5
DIN1
4
JHDMISPDIF
PLUG DETECT
SWITCH
Q201 DIR_RERR
DIR_XSTATE
GAIN CONTROL
Q200 A+9V
SAIR OUT L 18
CSFLAG(O) 25 DIR_CSFLAG
DIR_SCFLAG
19
M
SC_SHIFT, SC_SCDT P
SC_SHIFT
SC_SCDT
WAVE SHAPPER
IC211
IC2
4
762 1
31
MIC AMP
IC209
57
(PAGE 12)
N
(PAGE 13)
(PAGE 13)
(PAGE 13)
(PAGE 13)
(PAGE 14)
(PAGE 13)
(PAGE 12)
(PAGE 12)
U(PAGE 12)
ARC_SPDIF
AMP
IC3527 2

STR-KS370
STR-KS370
1212
5-2. BLOCK DIAGRAM - HDMI PC Section -
(PAGE 11)
(PAGE 13)
(PAGE 13)
(PAGE 11)
(PAGE 15)
(PAGE 13)
(PAGE 11)
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STR-KS370
STR-KS370
1313
5-3. BLOCK DIAGRAM - DSP/S-AIR Section -
A
DATA_DIR, DOUT,
BCK, LRCK CKOUT
GMUTE
LRCK
DOUT
DATA_DIR
SD1
SIGNAL SELECTOR
IC1701
14 4A
13 4B
CKOUT
11 3A
10 3B
SD0
BCK
SD2
SD3
52A
LRCK
BCK
62B
MCK
31B
4Y 12
3Y 9
2Y 7
SEL
1
1Y 4
SWITCHING
IC1702
31B
62B
10 3B
14
13
21A
F
4B
4A
1Y 4
2Y 7
3Y 9
SEL
1
4Y 12
MUTING
Q1700
C
DIR_XSTATE, DIR_RERR
CLK1
33
CNVSS
9
PCM_MULTI
21
SYSTEM CONTROLLER
IC1005 (2/4)
78 DPSIA
79 DPSIB
88 DPLRCK
94 DPFSCK
89 DPLBCK
16 DIR_ERR
82 DPSIE
81 DPSID
80 DPSIC
DSP SPIDS
26
DSP_RESET
88
DSP_INTR
68
SPIDS*
RESET*
INT_REQ
DSP
IC1003
DPSOA 64
SWITCHING
IC1002
1
2
5
3
7
6
MUTING
Q1004
DPDVLRCK 86
DPDVBCK 87
DPSOB 65
DPSOC 70
SWITCH
IC1000
AMP_BCK1
AMP_LRCK1
AMCK1
AMP_DATA1 – AMP_DATA3,
AMP_BCK1, AMP_LRCK1, AMCK
H
AMP_DATA1
AMP_DATA2
AMP_DATA3
DSP_SPI CLK
7
DSP MOSI
5
DSP MISO
6
S-AIR_I2C_SDA
78
SAIR_SEL
85
S-AIR_I2C_SCL
77
S-AIR GPIO2
67
SAIR_ADC_SEL
70
S-AIR_DET
71
S-AIR_SRC_MUTE
34
S-AIR RST
63
143
142
X1000
25MHz
XTAL
CLKIN
SD0 – SD3, MCK,
BCK, LRCK
97 NONAUDIO*
BAUDIO
S
R
DIR_XSTATE
DIR_RERR
122 121 15
DPSOE 77
BUFFER
IC1008
2A0
3B0
5A1
6B1
11 A2
10 B2
14 A3
13 B3
Y0 4
Y1 7
Y2 9
Y3 12
S
1
CN100
EZW-T100
4
2
16
26
15
14
23
19
18
7
12
25
20
11
24
M
S AIR OUT L
L ch
R ch
SD1
SD2
BCK1
BCK2
LRCK1
LRCK2
I2C_SDA
I2C_SCL
INT
ADC_SEL
GND
SRC_MUTE
RESN
R-CH
SIGNAL PATH
: AUDIO (ANALOG)
: AUDIO (DIGITAL)
SPICLK
MOSI
MISO
125 127 126
BUFFER
IC1015
14
13
12
2
3
4
5
6
7
DMPORT RX (UCOM TX)
DMPORT TX (UCOM RX)
6
5
CN1701
31 UCOM TX-DMP RX
32 UCOM RX-DMP TX
DET
7
CLK1
CNVSS
RESET
RTS1
RXD1
4
5
CN1002
TXD1
8
91 DMPORT_DET
DMPORT
FLASH PROGRAMMING
3
7
2
DMPORT_RX
DMPORT_TX
(PAGE 12)
(PAGE 11)
(PAGE 14)
(PAGE 11)
(PAGE 12)
(PAGE 11)
(PAGE 11)
(PAGE 12)
(PAGE 15)
Lch
Rch
14
13
R-CH
N(PAGE 11)

STR-KS370
STR-KS370
1414
5-4. BLOCK DIAGRAM - AMP Section -
+
H
AMP_DATA1 – AMP_DATA3,
AMP_BCK1, AMP_LRCK1, AMCK1
LSD
AMP_BCK1
AMP_DATA1
AMP_DATA2
DIGITAL POWER AMP
IC2005
STREAM PROCESSOR
IC2000
31 DATA1
OVER LOAD
DETECT
Q2005, 2006
SYSTEM CONTROLLER
IC1005 (3/4)
30 BCK
AMP_LRCK1 29 LRCK
36 XFSIIN
21 SCDT
SC_SCDT
AMCK1
AMP_DATA3
22 SCSHIFT
SC_SHIFT
23 SCLATCH
LAT1
27 INIT
INIT
24 OVF FLAGR
25 OVF FLAGL
OVF FLAGL
OVF FLAGL
OVFW
X2000
49.152MHz
L.P.F.
L.P.F.
OVF1
19 SOFT MUTE
SOFT_MUTE
18 NSP MUTE
20 PGMUTE
PGMUTE
NSPMUTE
19 SOFT MUTE
SOFT_MUTE
19 SOFT MUTE
SOFT_MUTE
OUTL1(+) 11
OUTL2(–) 9
OUTR1(+) 6
OUTR2(–) 4
XFSOIN 48
FSOCKO 37
XFSOOUT 14
FSOI 38
STREAM PROCESSOR
IC2001
31 DATA2
30 BCK
29 LRCK
36 XFSIIN
21 SCDT
SC_SCDT
22 SCSHIFT
SC_SHIFT
23 SCLATCH
LAT2
27 INIT
INIT
24 OVF FLAGR
25
OUTL1(+) 11
OUTL2(–) 9
OUTR1(+) 6
OUTR2(–) 4
XFSOIN 48
XFSOOUT 14
FSOI 38
STREAM PROCESSOR
IC2002
31 DATA3
30 BCK
29 LRCK
36 XFSIIN
21 SCDT
SC_SCDT
22 SCSHIFT
SC_SHIFT
23 SCLATCH
LAT3
27 INIT
INIT
18 NSP MUTE
20 PGMUTE
NSP_MUTE
PGMUTE
24 OVF FLAGR
LAT1
LAT2
LAT3
INIT
25
OUTR1(+) 6
OUTR2(–) 4
OUTL1(+) 11
OUTL2(–) 9
XFSOIN 48
FSOI
CLOCK
BUFFER
IC2004
FRONT L
+
_
_
_
_
_
OVER LOAD
DETECT
Q2003, 2004
L.P.F.
L.P.F.
FRONT R
+
TB2002
TB2001
+
_
OVER LOAD
DETECT
Q2007, 2008
OVER LOAD
DETECT
Q2009, 2010
OVER LOAD
DETECT
Q2011, 2012
L.P.F.
L.P.F.
SUR L
SPEAKERS
SUR R
SUBWOOFER
+
OVER LOAD
DETECT
Q2013, 2014
L.P.F.
L.P.F.
CENTER
+
DIGITAL POWER AMP
IC2007
L.P.F.
L.P.F.
DIGITAL POWER AMP
IC2006
/SD
PWM_A OUT_C
OUT_D
6
PWM_B
8
31
28
5
/RESET
7
DC DETECT
Q2017
DAMP_LATCH1
DAMP_LATCH2
DAMP_LATCH3
82
79
80
DAMP_INIT 76 OVF1
OVERFLOW1 83 OVFW
OVERFLOW2 84
SOFT_MUTE
DAMP_SOFT_MUTE 72 NSP_MUTE
DAMP_NSP_MUTE 56
DRIVE OPC (DIAG) 20
DC_DET 46
DRIVE _RST(EN) 81
L.P.F.
L.P.F.
PWM_D OUT_B
OUT_A
16 PWM_C
18
39
36
/RESET
17
/SD
PWM_C OUT_C
OUT_D
16
PWM_D
18
31
28
5
/RESET
7
PWM_B OUT_B
OUT_A
6PWM_A
8
39
36
/RESET
17
/SD
PWM_C OUT_C
OUT_D
16
PWM_D18
31
28
5
/RESET
7
PWM_A
OUT_B
OUT_A
639
PWM_B
836
/RESET
17
18 NSPMUTE
20 PGMUTE
NSPMUTE
PGMUTE
PROTECT DETECT
Q2018 – 2019 +31.5V
RESET
Q2020 – 2021 +3.3V
AMP_BCK1
AMP_LRCK1
AMCK1
AMP_BCK1
AMP_LRCK1
AMCK1
P
SC_SHIFT,
SC_SCDT
(PAGE 13)
(PAGE 11)
(PAGE 15)
SIGNAL PATH
: AUDIO (DIGITAL)
: AUDIO (ANALOG)
38

STR-KS370
STR-KS370
1515
5-5. BLOCK DIAGRAM - SMPS Section -
3
POWER CONTROL
IC901
D
(AC IN)
MAIN POWER
TRANSFORMER
T901
SUB POWER
TRANSFORMER
T902
F901
D908
ISOLATOR
PC901
B+ SWITCH
Q901 4VCC
1OCP
5OLP
1
POWER CONTROL
IC921
D
4VCC
6FB/OLP
8STARTUP
RECT
D931
D932
SHUNT
REGULATOR
IC931
D922
D910
D905
D906, 907
POWER ON/OFF
CONTROL
Q943, 947
+31.5V
RECT
D943
D914, 915
TH901
Q921
POWER VOLTAGE
CONTROL
Q981, 982
ISOLATOR
PC902
DSP +1.2V
+2.5V
REGULATOR
IC1001
LF901
LINE
FILTER
LF902
LINE
FILTER
RECT
D901
AMP +1.8V
+1.8V
REGULATOR
IC2003
RECT
D942
DMPORT +5V
+5V
REGULATOR
IC942
RECT
D941
+12V
REGULATOR
IC941
IC3509
A +9V
B+ SWITCH
Q946
SHUNT
REGULATOR
IC951
STBY +3.3V
50PCONT_1
39PCONT_3_SAIR
23PCONT_2
SYSTEM CONTROLLER
IC1005 (4/4)
F1
F2
VEE
FOR FLUORESCENT
INDICATOR TUBE
T700
DC/DC
CONVERTER
RECT
D726 – 727
OSC
Q701
60 FL_D_OUT
57 FL_CLK
59 FL_LAT
FLUORESCENT
INDICATOR TUBE DRIVER
IC700
7
DIN
8
CLK
9
STB
FL700
FLUORESCENT
INDICATOR
TUBE
SEG1 – SEG16,
SEG17
14 – 29,31
GRID1 – GRID12
42 – 31
4SIRCS_IN
ROTARY
ENCODER
RV750
REMOTE CONTROL
RECEIVER
IC750
MASTER
VOLUME
I/174 POWER KEY
92 VOL JOG
S301
+9V
REGULATOR
IC1012
D909
LSD
AMP +12V
HDMI +5V
+5V
REGULATOR
IC3510
K
+1.8V
REGULATOR
IC3528
HDMI +1.8V
+3.3V
REGULATOR
IC943
D +3.3V
97P_CONT_HDMI
B+ SWITCH
D1001D1002
D3515D3514
D1007
D1008
5VPWR
D729
(O)
ACTIVE
STANDBY
LED DRIVE
Q702 58 CEC_STBY_LED
D1003
ISOLATOR
PC903
D380
DISPLAY
INDICATOR
LED DRIVE
Q380 1SW1
D729
(G)
DISPLAY
INDICATOR
LED DRIVE
Q700 2SW1
95 AD KEY
S350
INPUT
SELECTOR -
S351
SOUND
FIELD
S352
INPUT
SELECTOR +
90 KEY_0
+5V
REGULATOR
IC1013
+5V
47P_CONT4_DSP
HDMI +3.3V +3.3V
REGULATOR
IC3526
SAIR +4V
+5V
REGULATOR
IC1010
+5V
REGULATOR
IC1700
AVCC
12RESET
73AC_CUT
RESET SIGNAL
GENERATOR
IC1006
RESET
SWITCH
Q1005
HDMI +1.8V
+1.8V
REGULATOR
IC3523
Q
S
+5V
REGULATOR
IC1009
(PAGE 12)
(PAGE 13)
(PAGE 14)
(PAGE 12)
+6.4V
REGULATOR

STR-KS370
STR-KS370
1616
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 Ωand 1/4 W or less unless otherwise
specified.
• f: internal component.
• 2: nonflammable resistor.
• 5: fusible resistor.
• C: panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
• A: B+ Line.
• B: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
*: Impossible to measure
• Voltages are taken with VOM (Input impedance 10 M).
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.
J: AUDIO (DIGITAL)
F: AUDIO (ANALOG)
f: TUNER
E: HDMI
N: MIC
For Printed Wiring Boards.
Note:
• X: Parts extracted from the component side.
• Y: Parts extracted from the conductor side.
• f: Internal component.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
CEB
These are omitted.
• Circuit Boards Location
Note:
The components identi-
fied by mark 0or dotted
line with mark 0are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés
par une marque 0sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu-
méro spécifié.
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
DISPLAY board
KEY FUNCTION board
LED board
KEY SELECTOR board
IR board
S-AIR board
IO board
HDMI PC board
FFC SUPPORT board
TUNER (FM/AM)
MAIN board
SMPS board

STR-KS370
STR-KS370
1717
5-6. PRINTED WIRING BOARD - MAIN Board (Component Side) - • : Uses unleaded solder.
• See page 16 for Circuit Boards Location.
1 2 3 4 5 6 7 8 9 10 11 14 1512 13
A
B
C
D
E
F
G
H
I
J
FLASH PROGRAMMING
118
CN1701
C1310
C1311
C1700
C1701
C1512
C1718
C1719
C1722
C1723
C1724 C1726
C1744
C1745
C1748
C1751
C1752
C1759
C1761
C1762
L2000
L2003L2006L2007
C2341
C2345
L2012 L2013
C1000
C1003
D1001D1002
1
220
19
CN110
B2000
C1055
14
CN2002
C1250
C1252
C1254
C1257
C2003
C2013
C1081
C1083
C2023
C1088
C2036
C2038
C2231
C2234 C2235
C2238
C2240
C2242
C2247 C2249
C2253
C2255
C2259
C2260
EB1001
C2265C2266 C2267C2268
112
CNP100
C2272C2273
C2278 C2279
C2283 C2284
C2287C2288 C2289 C2290
C2293 C2294
X1001
C2297 C2298
C1300
C1513
C1525
C1524
JR
JR
JR
C1503
C1504
C1505
FB1002
C1506
C1312
C1507
C1508
C1509
R2099
C1703
C1510
C1705
C1706
C1707
C1708
R1105
JL2101
R1106
JL2102
JL2103
C1518
R1108
EB2000
C1519
EB2001
EB2002
EB2003
EB2004
R1301
EB2005
C1520
R1304
R1305
R1112
R1306
R1113
C1717
C1523
R1114
R1115
R1309
R1116
R1117
R1118
R1119
L1000
R1310
R1313
L1003
L1007
R1700
R1318
R1701
C1729
R1125
R1702
R1126
JL2122
R1703
JL2123
R1704
R1128
JL2124
R1705
R1129
JL2125
R1706
JL2126
R1707
JL2127
IC1700
C1730
JL2128
18
916
IC1701
R1321
18
9
16
IC1702
IC1703
IC1704
R1130
R1325
R1131
C1736
R1133
R1134
C1738
R1135
R1136
JL2132
R1713
JL2133
R1138
X2000
JL2134
R1139
R1715
JL2135
R1716
R1717
R1330
C1740
R1718
JL2138
C1741
JL2139
R1332
C1742
C1743
R1140
R1335
R1141
R1142
R1336
R1143
C1747
R1720
R1338
JL2140
R1145
C1749
R1721
JL2141
R1722
C2302
JL2142
R1147
R1723
C2303
JL2143
R1148
R1724
R1725
R1726
C2306
R1727
C2307
C1750
R1728
R1340
R1729
C1755
C1756
R1153 R1154
R1730
FB2000
R1155
R1731 R1156
R1732
FB2002
R1157
R1733
FB2003
R1158
R1734
C2316
R1737
C2317
R1738
C1760
C2318
R1739
C2319
R2100 R2101
R1163
R1740
C2320
R1165
R1741
C2321
R1742
C2322
R1743
C2323
R1744
C2324
R1745
C2325
C2326
C2327
C2328
C2329
R1172
R1173
R2113
R1750
R1174
C2330
R1751
R1175
C2331
R1176 R1177
R1753
CL1000
R1178 R1179
CL1002
CL1004
R1180
R1181
R1182
D2126
R1185
C2342
R2127
CL1010
R1188
R2128
R2129
CL1012
R1190
R1191
R1192
TP2002
TP2003
TP2005
JL1006
CL1027
TP2007
CL1028
TP2008
R2140
CL1029
TP2009
R2141
R2145
R2146
R2147
CL1030
JL1010
TP2010
R2148
CL1031
TP2011
R2149
CL1032
TP2012
CL1033
TP2013
CL1034
TP2014
TP2015
CL1036
TP2016
CL1037
R2150
CL1039
R2151
R2152
R2155
R2157
CL1040
R2158
CL1041
JL1021
R2159
CL1042
CL1043
JL1024
TP2024
JL1025
TP2025
JL1026
TP2026
CL1047
TP2027
CL1048
JL1029
CL1049
19
CN1002
R2164
19 1
18 2
CN1007
CL1050
TP2030
JL1031
CL1051
TP2031
JL1032
TP2032
JL1033
CL1053
TP2033
EB1700
CL1054
C1001
CL1055
C1002
C2196
CL1057
C2197
BE
Q1005
B
E
Q1007
BE
Q1008
R2178
B
E
Q1009
CL2003
C1010
CL2004
C1011
C1012
C1013
CL2007
C1014
CL2008
C1015
C1016
C1017
R2183
C1018
R2184
C1019
R2185
R2187
C1020
C1024
C1025
D1003
C1027
R1000
C1028
D1005
C1029
R1002
R1003
1
2
13
12
CNS700
R1004
D1008
R2198
R1005
JL2001
R2199
R1006
JL2002
R1007
JL2003
R1008
IC1000
X1700
C1030
C1031
R1009
6
15
IC1001
C1032
IC1002
144
1
108
109 73
72
36
37
IC1003
C1033
C1034
IC1005
C1035
C1036
IC1006
C1037
C1038
R1010
1
89
16
IC1008
6
15
IC1009
C1039
R1011
R1012
R1013
R1017
6
15
IC1010
C1040
IC1011
R1019
JL1076
IO
IC1012
C1042
IC1013
C1043
8
5
1
4
IC1014
18
9
16
IC1015
C1046
C1047
C1048
R1021
C1049
R1022
R1023
FB1700
R1024
FB1701
R1025
FB1702
R1026
R1027
C1050
C1051
R1029
C1052
FB1707
C1053
FB1708
C1054
R1222
R1223
R1030
R1031
R1032
R1033
FB1710
R1034
C1251
R1036
C1060
C1255
C1061
C1256
C1062
C1065
C2006
C1067
BE
Q2003
BE
Q2004
BE
Q2005
R1042
B
EQ2006
BE
Q2007
R1044
BE
Q2008
R1045
BE
Q2009
R1047
C2204
C2010
R1049
C2205
C2011
C2206
C2207
BE
Q2010
L1701
BE
Q2011
BE
Q2012
C2016
BE
Q2013
C2017
C1078
R1050
BE Q2014
R1051
BE
Q2017
BE
Q2018
R1055
BE
Q2019
C1080
C2020
JL2630
C2021
JL2055
C1082
BE
Q2020
C1085
BE
Q2021
C2026
R1060
R1061
R1064
R1065
R1067
R2007
IC2000
R2008
C2030
C1091
IC2001
R2009
C2031
C1092
IC2002
IC2003
C2033
R2200
IC2004
C2034
R2201
C2035
1
44
22
23
IC2005
R2202
1
44
22
23
IC2006
R2203
1
44
22
23
IC2007
R2204
R2010
R1071
R2205
R2011
C2039
R2012
R1073
R2013
R1074
R2208
R2014
R2209
R2015
R1076
R2016
R2017
R2018
C2040
R2019
C2043
R2210 R2211
C2046
R2020
R2021
R1082
R2022
R1083
R2023
R2024
R1086
R2026
C2243
R2028
R1089
JL2087
R1090
R2031
R1093
R2033
R1094
R2034
R1095
R2035
C2251
R1096
R2036
JL2092
R1097
JL2093
R1098
R2038
JL2670
R1099
R2039
JL2096
JL2098
R2040
C2068
R2041
C2069
R2042 R2043
C2263
CL1711
EB1000
C2070
CL1701
C2071
CL1702
C2072
CL1703
C2073
C2270
R2055
R2057
R2058
SL2001
SL2002
R2069
R2072 R2073
X1000
C1106
1
2
25
24
CNS201
C1301
R2085
R2087
R2088
C1111
C1112
C1113
C1309
L1008
L1009
L1010
BE Q1006
BE
Q1004
BE
Q1700
TP2001
L1011
R2228
JL1035
5
8
4
1
1
12
13
24
25 37
36
48
1
12
13
24
25 37
36
48
1
12
13
24
25 37
36
48
1
12
13 24
25
36
37
48
IO BOARD
CNS200
(PAGE 24)
F
HDMI PC
BOARD
CN3512
(PAGE 26)
DISPLAY BOARD
CNS701
(PAGE 29)
SMPS BOARD
CN906
(PAGE 31)
S-AIR BOARD
CN104
(PAGE 24)
SMPS BOARD
CN904
(PAGE 31)
TB2001 TB2002
SPEAKERS
CENTERSUBWOOFER
SPEAKERS
SUR RSUR L FRONT RFRONT L
MAIN BOARD (COMPONENT SIDE)
(CHASSIS)
(CHASSIS)(CHASSIS) (CHASSIS)
(CHASSIS)
(CHASSIS)
(CHASSIS)
(CHASSIS)
C
AEB
1-881-001-
G
IC1705
11
(11)

STR-KS370
STR-KS370
1818
5-7. PRINTED WIRING BOARD - MAIN Board (Conductor Side) - • : Uses unleaded solder.
• See page 16 for Circuit Boards Location.
1 2 3 4 5 6 7 8 9 10 11 14 1512 13
A
B
C
D
E
F
G
H
I
J
FB1001
R2097
R2098
C1702
R1100
R1101
R1102
R1103
R1104
C1514
JL2100
C1709
FB1013
R1107
JL2104
R1109
JL2105
JL2106
JL2107
C1710
JL2108
C1711
JL2109
C1712
R1110
C1714
C1521
R1111
C1715
C1716
C1522
JL2110 JL2111
JL2112 JL2113
JL2114
JL2115 JL2116
JL2117
JL2118 JL2119
D1700
L1004
D1701
L1005
JL2120 JL2121
R1137
R1719
C1746
C2301
R1339
R1146
C2308
C2309
R1159
R1735
R1736
R1160
R1162
R1164 R1166 R1167 R1168 R1169
R1746
R1747
R1170
R1171
R2111
R2112
C2333
CL1001
C2335 C2336
C2337 C2338
CL1005
C2339
CL1008
R2125
R2126
R1187
C2343
C2348
C2154
C2155
C2156
CL1017
C2157
CL1018 CL1020
TP2000
CL1021
CL1022
CL1023
CL1024
TP2004
CL1025
TP2006
JL1007
JL1011
JL1012
JL1013
JL1014
JL1015
C2175
JL1016
C2176
JL1017
JL1018
JL1019
TP2019
JL1020
TP2020
TP2021
TP2022
JL1027
R2160R2161
R2165
R2166
CL1052
TP2035
CL1056
TP2036
TP2037
C1004
TP2038
C1005
TP2039
C1007
R2177
TP2040 TP2041
CL2002
TP2042
CL2005
R2188 R2189
C1021
D1000
R2190
R2191 R2192 R2193 R2194 R2195
R1014
FB1703
R1028
FB1704
FB1705
FB1706
R1224
C1058
R1225
R1035
C1258
C2004
C1259
C2005
C1066
C2007
C2008
C2009
C1261
R1048
C1071
JL2045
C1072
C1266
C2012
JL2046
C1073
JL2047
C1074
C2208
C2014
JL2048
C1075
C2209
C2015
JL2049
C1076
C2018
C1079
C2019
R1052
R1053
C2210
JL2050
C2211
JL2051
C2212
JL2052
C2213
JL2053
R1058
C2214
R1059
C2215
C2216
C2022
C2217
C2218
C2024
C2219
C2025
C1086
C2027
C2028
C1089
C2029
R1063
C2220
C2221
R1066
C2222
C2223
R1068
C2224
R1069
C2225 C2226
C2032
C1093
C2227
C2228 C2229
C2037
R1070
R2206 R2207
C2230
R1075
C2232
R1077
C2233
R1078
C2236
JL2076
C2237
JL2077
JR
JR1000
C2044
JL2078
JR
JR1001
C2239
C2045
JR
JR1002
JR
JR1003
C2047
JR
JR1004
JR
JR1005
JR
JR1006
JR
JR1007
R1084
JR
JR1008
R1085
JR
JR1009
C2241
R1087
C2244
C2246
JR
JR1010
C2248
JL2088
JR
JR1011
JL2089
JR
JR1012
JR
JR1013
R2224
R1092
R2226
R2227
C2250
JL2090
JL2091
C2252
C2254
JL2094
JL2095
C2256
C2257
JL2097
C2258
C2066
C2067
C2262
C2264
C2269
R2053
R2054
C2271
C2275
C2276 C2281
C2282
R2067
R2068
C2285
C2091
C2286
C2092
C2291 C2292
C2295
C2296
C1103
C1105
C2299
R2083
R2084
CL1007
CL1006
CL1009
CL1014 CL1013
CL1026
CL1016
CL1003
CL1015
CL1035
CL1061
CL1059
CL1063 CL1060
CL1068
CL1069
CL1070
CL1064
CL1072
CL1065
CL2009
CL1066
CL1067
CL1062
CL1074
CL1073
CL1071
CL2010
R1341
CL1705
CL1730
CL1729
CL1728
CL1727 CL1726
CL1725
CL1723
CL1724
CL1722
CL1720
CL1721
CL1718
CL1717 CL1716
CL1715 CL1714
CL1713
CL1712
CL1710
CL1709
CL1708
CL1707
CL1706
CL1075
MAIN BOARD (CONDUCTOR SIDE)
1-881-001-
11
(11)

STR-KS370
STR-KS370
1919
5-8. SCHEMATIC DIAGRAM - MAIN Board (1/5) - • See page 10 for Waveforms. • See page 33 for IC Block Diagrams. • See page 38 for IC Pin Function Description.
1 2 3 4 5 6 7 8 9 10 11 14 1512 13
A
B
C
D
E
F
G
H
I
J
+3.3V
HDMISPDIF
DGND
1k
R1733
100
R1730
100
R1722
100
R1721
100
R1720
1k
R1732
E
EB1700
1
2
3
4
5
6
7
8
9
10
11
12
131415161718192021222324
25
26
27
28
29
30
31
32
33
34
35
36
37 38 39 40 41 42 43 44 45 46 47 48
LC890561W
IC1704
DISEL(I)
SPDIF(O)
DIN0
DIN1
DIN2
DGND
DVDD
AD_IN
AGND
LPF(O)
AVD D
AGND
CKOUT
BCK(O)
LRCK(O)
DATA(O)
XSTATE(O)
DGND
DVDD
XMCK(O)
XOUT(O)
XIN(I)
EMPHA
AUDIO(O)
CSFLAG(O)
F0(O)
F1(O)
F2(O)
FV(O)
DVDD
DGND
VREF
BPSYNC(O)
ERROR(O)
DO
DI
CE CL(I) XSEL(I) MODE0(I) MODE1(I) DGND DVDD DOSEL0(I) DOSEL1(I) CKSEL0(I) CKSEL1(I) XMODE
1k
R1734
100
R1726
100
R1753
FB1708
100R1723
R1738 10k
220
R1731
0.01
C1738
100
R1729
12.288MHz
X1700 0.022
C1717
1M
R1741
1000p
C1736
100
R1718
100R1717
JL1076
FB1710
FB1702
FB1701
E+6V
AGND
A+9V
BD3842DATA
BD3842CLK
TC74VHC153A
TC74VHC153B
DCACON/OFF
R1735
3.3k
CL1711 C1741 1
CL1702
8765
4321
NJM4565M(TE2)
IC1705
V-
V+
R1740
47k
C1740 1
CL1703
10uH
L1701
R1736
4.7k
R1746
47k
R1739
47k
C1743 1
CL1701
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
18P
CN1701
DGND
VBUS(5V)
NC
VIDEO5V
DMPORT RX (UCOM TX)
DMPORT TX (UCOM RX)
DET
DGND
WM DET
WM A/D
(Lch)AGND
(Rch)AGND
Lch
Rch
WM RX
WM TX
VIDEO
VGND
C1742 1
C1086
0.1
R1747
47k
+5V
FB1704 FB1703
DMPORT_DET
DMPORT_TX
DMPORT_RX
10k
R1737
RT1N141C-TP-1
Q1700
HDMI_MUTE
ARC_SPDIF
SAIR-OUT-R
SAIR-OUT-L
10V
470
C1761
10V
470
C1719
10
C1726
50V
50V
10
C1724
16V
C1723
100
C1700
16V
47 0.1
C1706
0.1
C1707
C1705
0.1
C1760
0.1
C1722
100
16V
C1759
100
16V
R1719
100
0.1
C1716
0.1
C1747
50V
10
C1752
50V
10
C1748
14
13
12
11
10
9
87
6
5
4
3
2
1
IC1703
PCM1808PWR
Vref
AGND
AVc c
DVdd
DGND
SCKI
LRCK BCK
DOUT
MOD0
MOD1
FMT
VinL
VinR
50V
10
C1751
0.1
C1749
0.1
C1750
100
R1750
100
R1751
MA2J1110GLS0
D1700 C1746
1000p
MA2J1110GLS0
D1701
R1713
100
FB1707
50V
1
C1745
50V
1
C1744
0
R1727
0R1728
0
R1725
0R1724
1
C1708
1
C1703
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
25P
CNS201
RDS DATA
RDS CLK
DO/ST/SD
CL
DI
CE
TUNED SD
AGND
TC74VHC153 B
+9AV
TC74VHC153 A
TUNER GND
OPT OUT
DMPORT L
DGND
DMPORT R
DGND
ANALOG OUT R
+3.3V
ANALOG OUT L
BD3842 DATA
SAIR OUT R
BD3842 CLK
SAIR OUT L
DCAC ON/OFF
ST-CE
RDS_CLK
ST_CLK
ST_DI
RDS-DATA
ST_TUNED
SD-DO
330R1715
220R1716
33p
C1730
33p
C1729
100p
C1755
100p
C1756
0.1
C1709
HDMI_SD1
DIR_NONAU
DIR_CLK
161514131211109
87654321
TC74VHC157FT(EKJ)
IC1702
SEL
1A 1B 1Y 2A 2B 2Y
GND3Y
3B 3A 4Y 4B 4A ST
VDD
DIR_ERR
DATA_DIR
SI_E
MULTI_PCM
161514131211109
87654321
TC74VHC157FT(EKJ)
IC1701
SEL
1A 1B 1Y 2A 2B 2Y
GND3Y
3B 3A 4Y 4B 4A ST
VDD
DIR_RST
100R1704
FB1706
HDMI_SD3
100R1707
DIR_DO
DIR_XSTATE
SI_B
100R1706
HDMI_SD0
DIR_DIN
C1702
0.1
C1718
10
50V
LRCK
HDMI_BCK
100R1705
BCK
SI_C
100R1701
DIR_RERR
220R1700
HDMI_SD2
100
R1703
DIR_ZERO
SI_D
DIR_CSFLAG
0.1
C1714
C1762
10
50V
FB1705
DIR_CE
HDMI_LRCK
MCK
EMG_MUTE
HDMI_MCK
0.1
C1710
5
43
2
1
TK11150CSCL-G
IC1700
CTRL
GND
CNp Vout
Vin
R1742
22k
R1743
22k
R1744
22k
R1745
22k
16V47
C1701
0.1
C1715
0.1
C1711
0.1
C1712
DIR_DO
DIR_DIN
DIR_ERR
DIR_RERR
DIR_CSFLAG
DIR_RST
HDMI_SD2
DIR_ERR
DIR_RST
HDMI_MCK
DIR_XSTATE
DATA_DIR
DIR_CE
HDMI_SD1
HDMI_SD0
HDMI_SD2
DIR_CSFLAG
DIR_NONAU
HDMI_SD1
HDMI_BCK
DIR_DO
DIR_DIN
HDMI_SD3
HDMI_SD3
DIR_ZERO
HDMI_LRCK
DIR_CLK
HDMI_LRCK
HDMI_SD0
HDMI_BCK
DIR_CE
DIR_CLK
HDMI_MCK
DIR_NONAU
DIR_ZERO
DATA_DIR
DIR_XSTATE
DIR_RERR
IC1701
SIGNAL SELECTOR
IC1702
IC1704
DIGITAL AUDIO
IC1705
LINE AMP
(CHASSIS)
IC1703
A/D CONVERTER
IC1700
+5V REGULATOR
INTERFACE RECEIVER
DMPORT
DC5V
0.7A MAX
MUTING
SWITCHING
FB1700
6.3V
1000
C1512
MAIN
BOARD
(3/5)
(Page 21)
IO
BOARD
CNS200
(Page 25)
8
A
MAIN
BOARD
(3/5)
(Page 21)
14
MAIN
BOARD
(3/5)
(Page 21)
11
MAIN
BOARD
(2/5)
(Page 20)
5
MAIN
BOARD
(2/5)
(Page 20)
3
MAIN
BOARD
(3/5)
(Page 21)
9
MAIN
BOARD
(3/5)
(Page 21)
10
MAIN
BOARD
(2/5)
(Page 20)
1
MAIN BOARD (1/5)
0
2.8
0.3
3.3
3.3
0
3.3
1.71.71.72.53.33.31.61.60
3.3
3.3
3.3
3.3
0
1.8
0 0 3.3 3.3 3.3
2.5
5
3.4
1.7
1.7 1.7
3.1
0
5
1.3
3.3 6.3
1.3
3.4
2.5
2.5
505
5 5 5 8
1.7 0 1.7 1.3 0 1.3 3.4
0 0
3.40.30.2000
00001.701.71.701.7
IC B/D
IC B/D
IC B/D IC B/D
3

STR-KS370
STR-KS370
2020
5-9. SCHEMATIC DIAGRAM - MAIN Board (2/5) - • See page 10 for Waveforms. • See page 33 for IC Block Diagrams. • See page 38 for IC Pin Function Description.
MAIN BOARD (2/5)
1 2 3 4 5 6 7 8 9 10 11 14 1512 13
A
B
C
D
E
F
G
H
I
J
10k
R1017
JL1006
10
R1013
10k
R1014
100
R1022
8765
4321
TC7WZ08FK(TE85R)
IC1002
GND
VCC
100
R1007
100R1029
100
R1027
1k
R1034
0.1
C1002
22
R1008
0.1
C1060
54
321
74LVC1G79GW-125
IC1000
D CLK DGND Q
VCC
10kR1011
22
R1010
0.1
C1001
JL1008
123456789101112131415161718192021222324252627282930313233343536
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
737475767778798081828384858687888990919293949596979899100101102103104105106107108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
ADSST-AVR-1115
IC1003
VDDINT CLKCFG0 CLKCFG1 BOOTCFG0 BOOTCFG1 GND VDDEXT GND VDDINT GND VDDINT GND VDDINT GND INT_REQ DIR_ERR AD7 GND VDDINT GND VDDEXT GND VDDINT AD6 AD5 AD4 VDDINT GND AD3 AD2 VDDEXT GND AD1 AD0 WR* VDDINT
VDDINT
GND
RD
ALE
AD15
AD14
AD13
GND
VDDEXT
AD12
VDDINT
GND
AD11
AD10
AD9
AD8
A16
VDDINT
GND
A17
A18
GND
VDDEXT
VDDINT
GND
PF_CE
SPI_MAS
DPSOA
DPSOB
VDDINT
GND
VDDINT
GND
DPSOC
DPSOD
VDDINT
VDDEXT
GND
VDDINT
GND
DPSOE
DPSIA
DPSIB
DPSIC DPSID
DPSIE
VDDINT
GND GND
DPDVLRCK
DPDVBCK
DPLRCK
DPLBCK
VDDINT
GND GND
VDDEXT
DPFSCK
GND
VDDINT
NONAUDIO
SF_CE
VDDINT
GND
VDDINT
GND
VDDINT
GND
VDDINT
GND
VDDINT VDDINT
GND
VDDINT
GND
VDDINT
GND
VDDINT
GND
VDDEXT
GND
VDDINT
GND
VDDINT
RESET
SPIDS
GND
VDDINT
SPICLK
MISO
MOSI
GND
VDDINT
VDDEXT
AVD D
AVSS
GND
CLKOUT
EMU
TDO
TDI
TRST
TCK
TMS
GND
CLKIN
XTAL
VDDEXT
0.1
C1061
100
R1033
22
R1009
1M
R1012
10k
R1004
1234
6
5
SI-3010KM-TLS
IC1001
VC VIN GND VOUT ADJ
100R1030
100
R1026
1000
C1003
6.3V
10k
R1000
100
R1223
100
R1024
JL1007
1k
R1006
100
R1025
0.22
C1062
1k
R1047
D1008
1SR154-400TE-25
JL1009
10k
R1003
10k
R1021
RT1P140C-TP-1
Q1004
10k
R1019
470
R1005
2k
R1002
E+6V
L1005
+3.3V
+5V
SI_D
SI_C
SI_E
SI_B
EMG_MUTE
1
2
3
4
5
6
7
8
9
10
11
12
12P
CNP100
L1007
P_CON1
P_CON2
E+4V
D+3.3V
E+6V
DGND(SAIR)
BUP33V
MODEL/DESTINATION
DGND
D+5V
A+12V
AGND
1234
6
5
SI-3010KM-TLS
IC1010
EN IN GND OUT FB
C1255 0.1
R1045 10k
R1044
C1524
220
10V
1k
R1191
22k
R1092
10k
A12V
+3.3V_Amp
0.01
C1072
BCK
DATA_DIR
MCK
LRCK
DIR_NONAU
DIR_RERR
100
C1000
16V
C1254
47
16V
C1310
470
25V
C1309
0.1
R1309
1k
R1310
33k
1234
6
5
SI-3010KM-TLS
IC1009
EN IN GND OUT FB
R1313
5.6k
C1312
0.1
C1311
100
16V
R1318
10k
R1190
8.2k
0.1
C1025
0.01
C1012
25MHz
X1000
47
R1031
22p
C1266
C1081
1000
6.3V
10V
470
C1055
0.1
C1018
0.1
C1010
0.1
C1020
10
C1007
0.01
C1011
0.1
C1017
0.1
C1019
0.1
C1016
0.1
C1013
0.1
C1015
0.1
C1014
0.1
C1508
10p
C1004
8p
C1005
0.1
C1504
0.1
C1038
0.1
C1039
0.1
C1503
10
C1046
0.1
C1031
0.1
C1029
0.1
C1035
0.1
C1043
0.1
C1036
0.1
C1030
0.1
C1042
0.1
C1033
0.1
C1034
330R1023
0.33uH
L1011
0.1
C1027
0.1
C1506
0.1
C1024
10
C1021
0.1
C1040
0.1
C1507
0.1
C1032
0.1
C1028
0.1
C1037
0.1
C1505
0.1
C1050
0.1
C1053
10
C1058
0.1
C1049
0.1
C1054
0.1
C1051
0.1
C1048
0.1
C1052
0.1
C1047
220k
R1032
1000p
C111 3
AGND
50V
10
C1252
A+9V
1k
R1185
IO
G
TA7809AF-(T6L1SONQ
IC1012
L1003
1
C1112
0.47
C1082
5
43
2
1
TK11150CSCL-G
IC1013
CTRL
GND
CNp Vout
Vin
BCK
LRCK
AMP_DATA3
SI_B
SI_C
SI_D
SI_E
EMG_MUTE
SI_E
SI_D
SI_C SI_B
AMP_DATA1
AMP_BCK0
AMP_BCK1
AMP_LRCK0
AMP_LRCK1
BCK
LRCK
DIR_NONAU
DIR_RERR
DIR_NONAU
R1332
22
DSP_INT
DSP_SPIDS
DSP_MOSI
DSP_MISO
DSP_SPICLK
DATA_DIR
DATA_DIR
DSP_RESET
AMP_LRCK0
DIR_RERR
EMG_MUTE
AMP_DATA2
IC1000
SWITCH SWITCHING
IC1002
IC1001
IC1010IC1009
IC1012
+5V REGULATOR
IC1013
1
3
4
5
6
7
8
10
14
13
12
11
15
16
17
2
9
IC1003
DSP
+9V REGULATOR
+5V REGULATOR +5V REGULATOR
+1.2V REGULATOR
MUTING
16V
47
C1083
1
C1111
0.47
C1509
16 15
14
13
12
11
10
98
7 6 5 4 3 2 1S
AO
BO YO
A1
B1 Y1 GND Y2
B2 A2 Y3 B3 A3
/E
VCC
BUFFER
IC1015
TC74VHC157FT
IC1015
150
R1702
47
R1325
L1010
0.33uH
MODEL/DESTINATION
C1519
0.1
C1518
47
16V
FB1002
C1252
220
10V
C1257
47
16 V
L1009
C1256
0.1
150
R1341
18
L1008
22
R1330
MAIN
BOARD
(3/5)
(Page 21)
2
SMPS
BOARD
CN906
(Page 32)
MAIN
BOARD
(1/5)
(Page 19)
MAIN
BOARD
(5/5)
(Page 23)
MAIN
BOARD
(1/5)
(Page 19)
MAIN
BOARD
(4/5)
(Page 22)
B
6
5
4
3
MAIN
BOARD
3/5
(Page 21)
7
MAIN
BOARD
(1/5)
(Page 19)
1
1.4 03.3 3.3 3.3 3.3 03.3 3.31.2 1.2 1.2 1.2 1.2 1.2 3.4 1.2
1.2
3.4
1.2
1.2
3.4
1.2
3.3
3.3
1.2
1.2
3.3
1.2
3.41.23.32.51.30001.23.33.31.71.71.23.31.71.201.21.21.21.21.2
1.2
1.2
3.4
1.2
1.2
3.3
3.3
1.2
3.4
3.3
3.4
1.2
3.4
1.1
1.6
1.6
3.3
1.2
1.2
3.4 1.7 1.7 1.7 1.7 1.7 1.7
1.71.71.73.4
1.0 1.2 2.4 3.3
3.4 3.4 1.7 3.4 3.43.4
3.4 3.4
1.0 4.1 6.3 3.0
1.7 3.41.7
3.36.34.91.0
12.18.8
5
8.83.3
1.3
3.4
3.3
IC B/D
IC B/D
1