Sony KLV-21SG2 (serv.man2) Service Manual ▷ View online
KLV-21SG2 (UC) 3-1
3-1. BLOCK DIAGRAMS
SECTION 3
DIAGRAMS
1
10
9
8
7
6
5
4
3
2
1
CN6403
CN6401
OUT2
DETOUT
STLED
BILED
MODE
FMONO
MUTE
R
L
GND
1
2
3
4
5
6
7
8
9
10
GND
9V
30V
5V
SCL T
SDA T
GND
RF AGC
AFT
GND
Q6402
BUFFER
BUFFER
Q6403
Q6401,6404,6406
BUFFER
9V
30V
5V
TU6400
TUNER
DET OUT2
L OUT
R OUT
MUTE
FMONO
MODE
BIL IND
ST IND
DET OUT
AFT OUT
RFAGC
SCL
SDA
VIDEO
AUDIO L/R
CN9202
1
2
3
4
5
6
7
8
9
10
C2
G
Y2
G
V2
G
S-2
LV2
RV2
G
AUDIO
R
L
VIDEO
S VIDEO
1
2
3
4
V
L
R
J9202
VIDEO 2
INPUT
H2(2/2)
(INPUT TERMINAL)
6
5
4
3
2
1
CN9004
9
10
11
12
GND
L
R
MUTE
FMONO
MODE
BIL
STL
DETOUT
OUT2
1
2
3
4
5
6
7
8
9
10
GND
AFT
RF AGC
AGC DET(NC)
SDA
SCL
5V
30V
9V
GND
10
9
8
7
6
5
4
3
2
1
CN6450
CN6451
TV
LV2
C2
45
AV SW
COUT1
YOUT1
47
9
12
43
8
V2
Y2
10
IC2803
LV3 16
RV3 18
48 RTV
11 RV2
14 S2
S1
S2-1
7
6
RV1
4
3
Y
1
V1
1
5
2
C1
LV1
LTV
46
AUDIO L
AUDIO R
VIDEO
SDA 27
SCL 26
ROUT1 41
LOUT1 39
VOUT2 33
15
V3
Y
C
9V
5V
SCL_T
SDA_T
CR
16
14 C
CB
11
Y
8
IC2511
Y/V
9
6
Y/V OUT
CR OUT
SEL
3
CB/C OUT
5
Y
B-Y
AUDIO L/R
VIDEO
AUDIO R
AUDIO L
8
7
NC
C2
GND
Y2
GND
V2
GND
S-2
LV2
RV2
GND
NC
10
9
8
7
6
5
4
3
2
1
GND
RV1
LY1
S-1
GND
V1
GND
Y1
GND
C1
CN9007
S2-1
NC
NC
12
11
INPUT
VIDEO 1
J9201
R
L
V
4
3
2
1
S VIDEO
VIDEO
L
R
AUDIO
G
RV1
LV1
S-1
G
V1
G
Y1
G
C1
10
9
8
7
6
5
4
3
2
1
CN9201
(TUNER)
TU
20
19
17
16
14
13
11
10
8
6
5
4
3
2
1
CN2801(2/2)
SCL_T
SDA_T
SCL B 5V
SDA B 5V
Q6450
Q6451
Q6452,Q6453
SYNC SEP
Q6454
BUFFER
Q2802
Q2535
Q2535
BUFFER
BUFFER
Q2801
Q2533
Q2533
Q2537
BUFFER
BUFFER
Q2538
Q2540-2542
BUFFER
Q2556,2557,2560
BUFFER
1
VID
MUTE
PMOD
MOD0
MOD1
BIL
ST
AFT
AGC
SYMDET
SDA T
SCL T
LINRE MUTE
DVI-RST
SCL B 5V
SDA B 5V
TO B-1 BOARD
CN1007
2
7
12
CONT
Q2539
BUFFER
R-Y
CCP SW
SDA_B_5V
SCL_B_5V
A1-1
TO A1-2
Q6448
Q6449
Q6449
2
P_MUTE
UNREG33V
Q6448
Q6449
Q6449
D6448,6449
SYNC
C
U1
(INPUT TERMINAL)
LINRE MUTE
AUDIO L/R
Y/PB/PR/CCPSW/VID
Y/CB/CR
LINRE MUTE
V3/LV3/RV3
(AV SW)
KLV-21SG2 (UC) 3-2
BASS/TREBLE
VOL LOUD/ ATT
3
5
14
13
10 11
AUDIO CONTROL
IC7003
L
R
AUDIO L/R
Y/C
5
6
3
2
7
1
7
1
6
5
2
3
42
41
30
29
22 23 26
IC7011
AP
INL
INR
OUTL
OUTR
MODE
AUDIO L
AUDIO R
COMPARATOR
IC7009
MUTE
Q7001,7002
6
5
7
4
3
2
1
CN2802
HP DET
NC
SP MUTE
HP MUTE
4
3
2
1
SP L GND
SP L OUT
SP R GND
SP R OUT
CN7002
L
R
SPEAKER
AUDIO R
AUDIO L
G
TO B-1 BOARD
CN1005
IC7002
HP AMP
AUDIO L
AUDIO R
3
2
1
HP-L
HP-R
HP-GND
CN7601
4
HP-DET
H2
(HEADPHONE)
J7601
HEADPHONE
AUDIO R
AUDIO L
HP MUTE
INPUT2
COMPONENT
J9002
AUDIO
R
L
AV SW2
IC2505
25
26
27
HOUT 22
SCL 30
31
SDA
23
VOUT
20
IN2-2
42
41
43
IN2-1
IN2-3
PR2
PB2
Y2
X2502
4MHz
SCL_B_5V
SDA_B_5V
Q2558,Q2559
LEVEL SHIFT
17
CLAMP SW
16
YG IN
2
3
1 5
6
4
9
8
10
12
11
13
2
4
6
8
10
12
14
15
16
17
18
19
20
21
22
23
24
25
D-PR
D-PB
D-Y
VID
MSAU R
MSAU L
CLAMP GATE
SYNC ON
CCP SW
CSW M
CSW V
AU SW2
AU SW1
SRS
CSW H
CSW V
SYNC
Q2502,Q2503
IC2506
Q7011
SRS
1
2
3
7
5
6
1
3
2
Q7003
9V
IC7004
FILTER W
FILTER W
IC7005
CROUT
CBOUT
YOUT
CN7001
A1-2
(AV SW,AUDIO AMP)
SCL_B_5V
SDA_B_5V
HP DET
TO A-1
PR
PB
Y
L/R
V3/LV3/RV3
V3
Q7400
Q7401
3
2
6
5
1
7
AUDIO L
AUDIO R
COMPARATOR
IC7400
MUTE
Q7005,7006
J7400
Y/CB/CR
LINE MUTE
Y/PB/PR,CCP SW,VID
J9003
SW
IC2802
3
1
5
7
4
2
SW
IC2801
3
1
5
7
4
2
RV3
LV3
IC7007
AUDIO AMP
8
1
5
AUDIO L
10
OUT2
OUT1
AUDIO R
IN+
INV2+
SP MUTE
Q7007,7005
3
Q7018
Q7019
2
P_MUTE
7
5
6
1
3
2
IC7006
MIX
Q70020
R-Y
B-Y
Y
R
L
1
KLV-21SG2 (UC) 3-3
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CN4601
UNREG12V
UNREG12V
GND
GND
UNREG6V
UNREG6V
UNREG6V
GND
GND
GND
UNREG33V
GND
REG10.5V
GND
2
1
CN4605
REG16.5V
REG16.5V
25
24
23
22
CN2801(2/2)
POWER1
POWER2
POWER3
POWER4
IC4601
CONVERTER
24
VCC
STBY1
STBY2
OUT1_D
REG5V_IN
LIM
LL1
OUT1_u
LH2
OUT2_D
LL2
OUT2_U
INV2
FB2
POWER_GOOD
33V
AU12V
IC4603
5V REG
VCC
OUT
Q4602
SW
G
S1
S2
S3
D1
D2
D3
D4
27
4
1
2
3
5
6
7
8
Q4601
SW
G
S1
S2
S3
D1
D2
D3
D4
4
1
2
3
5
6
7
8
Q4603
SW
G
S1
S2
S3
D1
D2
D3
D4
4
1
2
3
5
6
7
8
Q4605
SW
G
S1
S2
S3
D1
D2
D3
D4
1
2
3
4
5
6
7
8
L8602
IC4602
9V REG
VCC
OUT
1
2
21
30
28
29
16
19
18
17
15
14
12
Q4606
L4601
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CN4603
D3.3V
D3.3V
D3.3V
D3.3V
GND
GND
GND
D5V
9V
GND
PANEL12V
PANEL12V
GND
GND
VGA(NC)
DVI-MUTE(NC)
GND
GND
3.3V_ALERT
5V_ALERT
DCIN_ALERT
GND
DIMMER
BACKLIGHT
PANEL_DET
5
4
3
2
1
CN4604
DIMMER
BACKLIGHT
PANEL_DET
GND
D5V
D4612
D4611
+9V
+12V
PS4601
9
10
B
TO B-1 BOARD
CN1003
TO LCD PANEL
TO G1 BOARD
CN6351
C
TO B-1 BOARD
CN1007
A1-3
(POWER SUPPLY)
D3.3V
REG16.5V
16.5V
Q4604
2
P_MUTE
TO D2 BOARD
CN8210
3
2
1
N
L
CN6002
F6000
IC6002
DRIVER
1
15
2
23
22
20
16
PROT
Q6001
Q6005
CONVERTER
CONVERTER
Q6006
T6003
PH6002
IC6005
5
7
7
6
5
2
1
UNREG 6V
UNREG 6V
UNREG 6V
UNREG 12V
UNREG 12V
CN6003
D6019
Q6003,Q6004
P-ON SW
1
2
4
3
3
4
2
1
PH6001
T6001
CN6302
POWER ON
STBY 5V
GND
3
1
4
Q6007
P-ON STOP
CONV.
IC6001
1
4
2
3
8
7
5
D6011
D6010
1
3
9
8
D6015
5
6
G2
(POWER SUPPLY)
AC IN
L6003
D6000
14
13
12
11
L6004
+17V
F/B
D6006
Q6002
CONV.CONTROL
IC6003
VCC
OUT
IC6004
5V REG
UNREG 33V
11
REG 16.5V
13
2
1
REG 16.5V
REG 16.5V
CN6004
TO A-3 BOARD
CN4601
CN1009
TO B-1 BOARD
10
9
T6002
11
12
13
8
9
10
D6015
D6018
D6020
D6017
D6021
D6022
5
7
D
1
2
CN4501
IC4501
3.3V REG
1
5
2
4
2
1
3.3V
3.3V
CN4502
TO B BOARD
CN3002
MSB
(3.3V REG)
KLV-21SG2 (UC) 3-4
CN3001
3
4
5
6
8
10
13
20
21
28
40
43
44
45
46
47
48
49
VCLK
VPEN
VVS
VHS
MSAU L
MSAU R
VUV0
VUV7
VY0
VY7
FLAG
MENU STATUS
AC DET
TXD MS
PIC MUTE MS
RXD MS
MS RESET
MS BS2
Q3004,Q3007
FL3001
L.P.F
L.P.F
FL3002
Q3005,Q3008
L.P.F
FL3003
Q3006,Q3009
5
6
2
3
6
5
7
1
7
IC3003
OP AMP.
OP AMP.
IC3002
BUFFER
Q3013
BUFFER
Q3012
2
4-5
7-8
10,11
13,31
33,34
36,37
39,40
42,45
47,48
50,51
53,54
74,56
60-66
22-27
20
68
63
19
18
16
17
8
18
20
44-45
47-50
54-59
63-66
98-99
101-105
108-112
117-120
68-70
72-74
79-82
86
89
90
92
91
93
97
94
32
D0-D31
A0-A12
13
MSCLK
MSDE
MSVS
MSHS
PXI
Y
PB
PR
124-128
131-133
140-144
147-149
155
156
157
233
205
204
223-226
218-221
211-215
206-208
3
5
4
196
189
206
199
97
96
95
12
6
5
4
3
IC3304
READ PLL
HRERF
RPL LHD
C541
5V
SDRAM
IC3303
19-24
27-32
2,3
5,6
8,9
11,12
39,40
42,43
45,46
48,49
16
17
15
14
18
35,36
37-42
46-49
12
DRSD A0-A11
13-20
25-32
DRSD DQ0-DQ15
16
7
8
9
10
11
XCAS
XRAS
XWE
QDM
XCS
Q3304 VCO LIM.
C0-C7
8
8
Y0-Y7
MSVS
MSHS
MSCLK
122
129
133
140
154
147
117
98
99
67
57
58
61
69
93
DR Y0-Y7
8
8
DR V0-V7
8
DR U0-U7
CLK
HS
VS
CS
CLRK
CLK
CKE
RAS
CAS
SDQM
WE
DRC4
DRC5
DRC2
DRC1
FFSW
CHROMA DEC.
IC3007
IC3302
DRC MF
CCP(Y0-Y7)
8
CCP(C0-C7)
8
CP-HS
CP-VS
CCPCK
IC3008
SDRAM
8
C0-C7
8
Y0-Y7
24
22
20
18
16
14
12
11
10
9
8
7
6
5
4
3
2
1
D-PR
D-PB
D-Y
VID
MSAU R
MSAU L
CLAMP GATE
SYNC ON
CCP SW
CSW-H
CSW-V
AV SW2
AV SW1
SRS
HP DET
SLEEP MUTE
SP MUTE
HP MUTE
CN1005
TO MS BOARD
CN4000
TO A-2 BOARD
CN2802
3
4
231
SDA B
SCL B
3.3V
X3002
79.99188313MHZ
158
CCPCK2
39
DEV RST
158
35
CLK
36
BBOM
76,77
79,80
82,83
85
3
2
1
5
3
7
6
11
25
26
16
15
X3001
14.318MHZ
SDA B 5V
SCL B 5V
IC3001
BUFF
MSAU L
MSAU R
Q3010
BUFF
AUTO WIDE
IC3004
117
90
89
SCLB
SDAB
DR54
XDRC
XDRC
DEV RESET
6
9
8
11
8
12
13
12
4
5
3
13
9
5
MSDE
MS CLK
IC5006
IC5003
CCPCK2
CDHS
PWVPEN
PWVCLK
3
2
1
DIMMER
BACK LIGHT
PANEL DET
CN1003
TO A-3 BOARD
CN4603
25
24
23
22
21
20
18
16
15
13
12
10
9
7
6
4
3
2
TU MUTE
FMONO
MOD0
MOD1
BIL
ST
AFT
AGC
SYNO DET
SDAT
SCLT
GR SW
GR ALLRST
SCL B 5V
SDA B 5V
POWER1
POWER2
POWER3
POWER4
CN1007
1
SDA B 5V
SCL B 5V
SCL B
SDA B
56
57
15
107
108
19
134
133
109
119
28
125
49
47
31
126
127
12
13
17
16
22
30
CPVS
CPHS
DEV RST
MENU STATUS
BRD STATUS
RESET
RXD
TXD
EN
PANEL DET
BACK LIGHT
DIMMER
GR ALLRST
GR SW
SYNC DET
AGC
AFT
ST
BIL
MOD1
MOD2
F MONO
TU MUTE
64
65
43
44
65
23
24
26
128
63
33
34
42
46
132
131
130
8
7
6
5
DRC1
DRC2
DRC4
DRC5
DRC2
HP MUTE
SP MUTE
SLEEP MUTE
HP DET
SRS
AU SW1
AU SW2
CSW V
CSW H
CCP SW
SYNC ON
CLAMP GATE
POWER4
POWER3
POWER2
POWER1
IC1006(1/2)
MAIN CPU
TO A-1 BOARD
CN2801
15
DEVRST
MS BS2
A
G
B
C
B-1
(MAIN CPU,DRC-MF,CHROMA DEC.)
TO B-2
TO B-2
TO B-2
TO B(2/2)
B-Y
R-Y
Y
B-Y
Y
R-Y
2
1
POWER ON
STBY 5V
CN1009
TO G2 BOARD
D
CN6302
STBY5V
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