Sony STR-K402 Service Manual ▷ View online
8
STR-K402
3-1. CIRCUIT BOARDS LOCATION
STANDBY board
POWER SW board
HP board
DISPLAY board
MAIN board
VIDEO board
DIGITAL board
9
9
STR-K402
3-2. BLOCK DIAGRAM – MAIN SECTION –
— TUNER UNIT —
• Signal Path
• R-CH is omitted due to same as L-CH.
: FM
: CD
FM
AM
R-CH
S DATA
PLL DATA
S CLK
S LAT
STEREO
AUTO STOP
S DATA
DATA OUT
S CLK
S LAT
STEREO
TUNED
T MUTING
T MUTING
FM
AM
R OUT
L OUT
CD IN
MD/TAPE OUT
DVD/LD
AUDIO IN
VIDEO
AUDIO OUT
VIDEO
AUDIO IN
FRONT
SURROUND
CENTER
SUB WOOFER
J501
PROC.
IC201
IN G2
63
IN B2
70
REC OUT 2A
61
IN C2
69
IN E2
67
REC OUT 2B
62
49
L OUT
IN D2
68
43
SL OUT
37
C OUT
28
SW CH OUT
MUTING
Q361
DATA
32
CLOCK
31
LATCH
33
DATA
CLOCK
S CE
MUTING
Q362
MUTING
Q363
MUTING
Q364
J1004
J1006
VIDEO
VIDEO IN
MONITOR
VIDEO OUT
MOUT
10
V1
12
OUT
5
V2
3
V3
1
2
S1
13
S2
4
M2
11
M1
VIDEO SELECT
IC1015
66
AUTO STOP
S1
75
S2
76
VIDEO MUTING
74
65
67
STEREO
62
TUNER DATA IN
60
TUNER DATA OUT
61
TUNER CLK
59
TUNER LAT
79
M CLK
80
M CE
78
M DATA
AUTO STOP
T MUTING
T MUTING
STEREO
DATA
S DATA
S CLK
S LAT
CLOCK
S CE
DATA
SYSTEM CONTROL
IC102(1/2)
TV/SAT
AUDIO IN
J401
J402
MD/TAPE IN
J403
3
1
IC401(1/2)
DIGITAL
DVD/LD IN
J1001
IR LINK
DET
IC1002
DIGITAL
TV/SAT IN
3
5
6
2
IC1003
DIGITAL AUDIO
I/F RECEIVER
IC1004
L
DIN0
3
DIN1
4
DO
35
DI
36
CLK
38
CE
37
ERROR
34
XSTATE
17
XMODE
48
12.288M
22
DIR DO
DIR DI
DIR CLK
DIR CE
DIR ERROR
DIR XSTATE
DIR MODE
13
MCLK
14
BCK
15
LRCK
16
DATAO
IC1003
1
7
IC1005
X1101
12.288MHz
6
2
IC1005
AUDIO DSP
IC1006
SDIA1
85
SDIA0
84
SO
67
SI
68
SCK
69
CS
66
CSB
65
IC
62
XI
8
DSP SO
47
SBOB0
46
SBOB1
45
SBOB2
SDBCK0
83
SDWCK0
82
DSP SI
DSP CLK
DSP CS
DSP CSB
DSP IC
3
5
IC1005
IC1007
SRAM
AUDIO CODEC
IC1008
MCLK
39
CDT1
43
CCLK
42
DIF0/CSN
41
DFS
11
PDN
17
SMUTE
3
CODEC CDT1
27
L OUT1
BCK
4
LRCK
5
SDTO
9
SDTI1
6
SDTI2
7
SDTI3
8
CODEC CLK
CODEC CS
CODEC DFS
CODEC MUTING
CODEC PD
5
7
IC402
3
L OUT2
3
1
IC403
23
L OUT3
3
1
IC404
24
R OUT3
5
7
IC404
LIN+
30
LIN-
29
2
1
IC1201
6
7
IC1201
ANALOG SOUND
IN F2
66
SW CH N IN
27
SL
50
44
38
SEL OUT2
60
TIN2
58
45
39
26
L CH N IN
SL CH N IN
C CH N IN
SL
C
SW
DOUT2
59
SL CH D IN
C CH D IN
SW CH D IN
A
89
VIDEO
VIDEO OUT
DVD/LD
VIDEO IN
TV/SAT
VIDEO IN
-5V
REG
3
2
-5V
IC1014
-12V
90 92 91 95 96 93
94
DIR DO
DIR D1
DIR CLK
DIR CE
DIR ERR
DIR XSTATE
DIR XMODE
DIR DATA0
24
DSP SO
DIR DO
DIR D1
DIR CLK
DIR CE
DIR ERR
DIR XSTATE
DIR XMODE
22
DSP SI
21
DSP CLK
25
DSP CS
99
DSP CSB
100
DSP IC
69
CODEC CDT1
DSP SO
DSP SI
DSP CLK
DSP CS
DSP CSB
DSP IC
68
CODEC CLK
73
CODEC CS
70
CODEC DFS
71
CODEC PD
72
CODEC MUTING
98
ANA/DIG
CODEC CDT1
CODEC CLK
CODEC CS
CODEC DFS
CODEC PD
CODEC MUTING
MUTING
CONT
Q103,104
88
SYSTEM MUTING
MUTING
SWITCH
Q379
49
MD0
50
MD1
51
MD2
19
FLASH 1
20
FLASH 2
MD0
VDD
MD2
FLASH 1
FLASH 2
RESET
+5.6V
CNS105
FOR FRASH
PROGRAMMING
B
+5V
REG
3
1
+5V
IC1009
+9.2V
+5V
REG
3
1
+5V
IC1011
+5V
REG
3
1
+5V
IC1013
+3.3V
REG
3
1
+3.3V
IC1010
MULTI CH IN
ANTENNA
10
10
STR-K402
3-3. BLOCK DIAGRAM – DISPLAY SECTION –
RESET
Q100,101
Q659
• Signal Path
• R-CH is omitted due to same as L-CH.
: FM
IN2
8
12
+V OUT2
POWER AMP
IC701
9
NF2
LIMITER
Q701
11
-V OUT2
LIMITER
Q702
BOOSTER
Q703
BOOSTER
Q704
CURRENT
DETECT
Q705,706
OVER LOAD
DETECT
Q708,709
IN1
6
2
+V OUT1
5
NF1
LIMITER
Q651
3
-V OUT1
LIMITER
Q652
BOOSTER
Q653
BOOSTER
Q654
CURRENT
DETECT
Q655,656
IN+
1
6
+V OUT
POWER AMP
IC501
2
IN-
LIMITER
Q501
5
-V OUT
LIMITER
Q502
BOOSTER
Q503
BOOSTER
Q504
CURRENT
DETECT
Q505,506
OVER LOAD
DETECT
Q507,509
OVER LOAD
DETECT
Q657,658
Q707
D706
D606
D506
D721
PROTECT
SWITCH
Q722,723,725
RELAY
DRIVE
Q791
RY791
RELAY
DRIVE
Q730
RY730
D731
RELAY
DRIVE
Q610
RY601
D735
RELAY
DRIVE
Q550
RY550
D734
IC401(2/2)
5
7
RELAY
DRIVE
Q560
RY560
D736
L
R
SR
SL
C
R-CH
R-CH
R-CH
SPEAKERS
FRONT
PHONES
SPEAKERS
SURROUND
SPEAKERS
CENTER
TM601
TM602
J253
58
PROTECT
15
H/P RY
10
SP A RY
14
REAR RY
12
CTR RY
13
WOOFER RY
LED DRIVE
Q008
RV102
VOL ENCODER
MASTER
VOLUME
VOLUME
1
3
VOL A
1
VOL B
2
PW KEY IN
56
S150
77
RESET
47
STOP
57
SIRCS
REMOTE
CONTROL
RECEIVER
2
1
IC101
POWER
CONTROL
IC950
5
8
3
6
+5.6V REG
Q951
D110
D109
D910-913
AC
IN
IN
T902
F901
RY901
D915
D914
RELAY
DRIVE
Q901
D820-823
84
VCC
23
VCC
-7V
REG
3
2
+7V
REG
3
1
+5V
REG
3
1
+5V
REG
3
1
+5V
REG
3
1
AUDIO
+5V
LED
+5V
+5V
AUDIO
+7V
AUDIO
-7V
TUNER,RDS
VIDEO
+5V
IC807
IC803
IC804
IC801
IC802
POWER RY
8
RELAY
+B
+12V
REG
3
1
TUNER
+12V
IC806
-30V REG
Q801
FL201
-30V
-B SW
Q691
POWER AMP
-B
D898
D802
T901
POWER AMP
+B
82
83
X0
X1
X101
16MHz
FL1
FL2
L
SL
SL
C
SW
A
VCC
13
VCC
14
+B
9
POWER
MUTING
Q747,748
29
AC MUTING
J791
FLUORESCENT
INDICATOR TUBE
FL101
16
FL DAT
17
FL CLK
18
FL LAT
7
DIN
8
CLK
9
STB
14 29
SEG1-16
42 31
GRID1-12
FL1
FL2
2
LEVEL LED
3
NAME LED
1
SUR LED
4
SETUP LED
FL/LED DRIVE
IC103
D007-010
3
BLU LED
LED DRIVE
Q009
4
DCS LED
5
AFD LED
7
MODE LED
6
2CH LED
+5V
D011
D014
D002
D003
D004
FUNCTION
KEY
AD KEY IN1
38
S110,112,113
S115-118
S121,122
S121,122
S100-103
S105-109
S105-109
FUNCTION
KEY
AD KEY IN2
39
FUNCTION
KEY
AD KEY IN3
40
S111,114,120
S123-129
FUNCTION
KEY
AD KEY IN4
41
S104
S131-136
52
HSTX
D101
B
RESET
D824-827
VIDEO
+9.2V
VIDEO
-12V
SYSTEM CONTROL
IC102(2/2)
55
HP SW
SUB WOOFER
AUDIO OUT
?/1
SYSTEM
POWER
11
11
STR-K402
3-4. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) –
• See page 20 for IC Block Diagram.
IC B/D
IC B/D
IC B/D
(Page 13)
(Page 12)
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