DOWNLOAD Sony KV-28FS20U Service Manual ↓ Size: 10.06 MB | Pages: 74 in PDF or view online for FREE

Model
KV-28FS20U
Pages
74
Size
10.06 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-28fs20u.pdf
Date
PREV: Sony KV-29FQ75A (serv.man3) Service Manual

Sony KV-28FS20U Service Manual ▷ View online

30
29
D618
PROTECT
3
5
6
7
48
46
45
43
42
9
12
26
25
24
28
23
39
13
38
15
35
20
31
21
22
TO C BOARD
CN703
ROT COIL
V- OUT
E/W
V- OUT
H DRIVE
V SYNC
HFBP
EHT
ABL
DGC RELAY
PROT
AFC
SIRCS
SPKRL
STBY
SMART SW
STBY LED
VM OUT
MUTE
H/P L
H/P R
R IN
L IN
V IN
C IN
Y IN
TO A (2/2)
BOARD
CN1
5
-
+
7
IC800
PIN CORRECTION
5
PIN OUT
Q800, 801
SWITCH
Q503
SWITCH
Q501
SWITCH
Q502
IC500
V OUT
1
3
5
6
7
+
D803
V BOOST
+15V
V + I/P
F B-PLS
V OUT
V
c
c
 OUT
V - I/P
T800
PMT
L804
HLC
D807
L802
+135V
D815
H CENT
D808
H CENT
5
3
6
4
1
2
1
4
2
8
D810
200V RECT
9
7
135V
+15V
-15V
HV
13
11
FV
12
200V
+B
CN802
FV TO C BOARD
J701 (G4)
HV TO
PICTURE TUBE
200V
H2
CN800
V+
V-
H-
H+
H OUT
Q802
H DRIVE
Q803
SWITCH
Q805
D800
H DUMPER
D801
H DUMPER
+9V
4
1
3
3
1
5
4
3
2
1
RELAY DRIVE
Q611
D619
PROJECT
RY600
+15V
R
L
R
L
MUTE
Q1204
1
IC1201
HEADPHONE AMP
7
3
6
MUTE
Q1203
MUTE SWITCH
Q1202
+5V
5
3
CN1408
L OUT
R OUT
J1200
L
R
4
CN1401
TO VM BOARD
CN1716
MUTE SWITCH
Q1200
VM OUT
SPR
MUTE
MUTE SW
CN1403
TO D1 BOARD
CN2202
MAIN RECT
D600
D606
D601
D605
4
8
6
14
3
D603
REF
D604
SOFT START
Q601
4
3
2
1
IC601
OPTO-COUPLER
T601
SRT
2
REG
2
1
IC602
ERR-AMP
POWER OFF SWITCH
Q605, 606, D617, 625
+135V
+33V
20
21
19
16
17
18
-21V
D613
+21V RECT
D614
-21V RECT
+21V
3
1
15
D609
135V RECT
+15V
1
3
IC606
9V
STDBY 5V
IC603
D612
15V RECT
D611
5V RECT
7.5V
DGC
CN601
THP600
AC IN
AC IN
IC600
POWER CONTROL
8
4
3
9
INH
F/B
Vcc
B
7
6
1
5
OCP
C
D IN D OUT
+
D607
5V REG
9V REG
CN902
D505
D504
D507
T803 FBT
L801
T804
HDT
D502
-15V RECT
D503
+15V RECT
4
IC1200
AUDIO AMP
7
2
5
11
L IN L OUT
R IN R OUT
CN602
D (             )
DEFLECTION AND
POWER SUPPLY
TO H BOARD
CN5601
RY601
RELAY DRIVE
Q607
13
D608
2
2
1
4
3
12
5
7
1
3
4
6
8
13
11
9
8
3
1
CN805
CN903
R AV IN
L AV IN
MPEG/AV3L
MPEG/AV3
MPEG/AV3R
TO H BOARD
CN5903
HP L
HP R
Y IN
C IN
MPEG/AV3R
MPEG/AV3L
CN904
SMART CORR
H-
SMART SW
TO D2 BOARD
CN8801
16
SPKRR
DF TO D1 BOARD
CN 2806
6
2
CN804
5
6
R825
3
1
3
4
5
CN1803
ROT COIL
V-DRIVE
V+ SAW
KEY
RESPL
CN901
TO H BOARD
CN5901
TO VM BOARD
CN1801
STBY +5V
MUTE SWITCH
Q1201
SPL
TO D1 BOARD
CN3803
S801
+135V
4
3
MUTE
MUTE SW
TO A2 BOARD
CN4407
CN1407
TO D1 BOARD CN2804
3
CN801
TO J2 BOARD
CN6202
5-1.  BLOCK DIAGRAMS [1]
32
31
5-1.  BLOCK DIAGRAMS [2]
RV701
H STAT
CN701
R
G
IK
B
R
G
B
1
2
6
3
C
(RGB DRIVE)
TO D BOARD
FV (T803)
+9V
IC703
VIDEO OUT (GREEN)
1
5
9
3
VB
IK
VI
VOF
VO
8
IC702
VIDEO OUT (BLUE)
1
5
9
3
VB
IK
VI
VOF
VO
8
3
11
H2
12
10
RCV
G2
1
5
H1
H2
7
8
H2
H1
G2
V901
PICTURE  TUBE
TO D BOARD
HV (T803)
HV
TO D BOARD
CN804
G4
IC701
VIDEO OUT (RED)
1
5
9
3
VB
IK
VI
VOF
VO
8
FV
J701
TU101
SCL
CN201
SIF BUFF
Q120,122
A
SIGNAL PROCESSING
SDA
AFC
MON 1
CVBS
QSS
AM AF
CVBS OUT
CVBS IN
MODE
B20
B19
A20
A15
B8
A8
A19
CVBS/Y IN
SVHS-C IN
MODE
CVBS OUT
BLANKING
RED IN
GREEN IN
BLUE IN
B11
B7
B16
B15
VIDEO BUF
Q110-112
VIDEO BUFF
Q202
23
28
33
34
30
60
HPL
47
48
IC202
AUDIO PROCESSOR
25
8
9
36
37
50
51
31
61
SIF BUFF
Q121,124,130
CF120
AUDIO R IN
AUDIO L IN
B2
B6
AUDIO R IN
AUDIO L IN
A2
A6
AUDIO L OUT
AUDIO R OUT
B3
B1
AUDIO L OUT
AUDIO R  OUT
A3
A1
59
3
1
HPR
V3,Y3,C3
SCL,SDL
AGC MONT
5
11
12
14
16
IC302
BASE BAND DELAY-LINE
23
27
29
TV IN
IC201
AV SWITCHING
25
21
20
3
4
6
31
5
7
1
15
10
22
26
IC301
Y/C JUNGLE
51
50
SCL
SDA
AGC
+33v
+5v
RF IN
V3
Y3
C3
L
R
+5V
IC205
RESET
R OUT AV-1
L IN AV-3
R IN AV-3
L IN AV-2
R IN AV-2
L IN AV-1
L OUT AV-1
R IN AV-1
MONO IN (AM)
ANA-(IN2)
SCL
SDA
Z
RESET
L OUT AV-2
R OUT AV-2
L OUT HP
R OUT HP
SSCP
R-Y OUT
B-Y OUT
B-Y IN
B-Y IN
4
3
7
8
12
13
14
VIDEO BUFF
Q201
CV BS
13
53
C IN AV-3
CUBS IN
AV-1
CUBS IN
AV-2
Y IN AV-2
C IN AV-2
MODE
MODE
CVBS IN AV-3
Y IN AV-3
CVBS OUT
AV-2
CVBS OUT
SDA
SCL
SSCP OUT
R-Y OUT
B-Y OUT
B-Y IN
R-Y IN
CVBS IN
R-1 IN
G-1 IN
B-1 IN
SYNC IN TV
SDA
SCL
FB-1
R1
G1
B1
BUFFER
Q332
VM AMP
Q331
SWITCH
Q306
67
66
48
55
79
IC1 TXT MICRO-CONTROLLER
63
16
6
LEVEL SHIFT
Q305
8
LEVEL SHIFT
Q4,5
54
IC4 RESET
1
3
STDY 5V
+5V
OUT
61
IC1001
COMPACT TEXT
66
67
68
64
5
4
10
17
BUFF
Q1,1002
SWITCH
Q1001
77
76
75
58
78
2
3
7
65
61
64
62
80
9
11
24
27
48
47
46
PROTECT
Q330
AMP
Q80,81
V SYNC
AFC
H SYNC
62
63
3
48
4
5
46
6
7
8
45
CN301
CN1
ROTATION COIL
V+ DRIVE
EHT
H FLYBACK
H DRIVE
V-DRIVE
EAST WEST DRIVE
16:9
V SYNC
CHASSIS STANDBY
DGC RELAY
SIRCS
VM
AUDIO MUTE
FRONT KEY 1
STANDBY LED
LUMISPONDER
1
2
3
6
21
22
23
28
24
25
26
6
5
32
33
31
37
38
39
28
49
SVHS-Y
SVHS-C
11
9
55
57
SVHS-C
SVHS-Y
SVHS-Y IN
SVHS-C IN
11
17
18
19
15
16
FB-1 IN
R-2 IN
G-2 IN
B-2 IN
FB-2 IN
HB-2 IN
SWITCH
Q300
49
R3,L3
43
9
12
13
15
39
38
16
35
32
31
42
R2
G2
B2
20
ABL
PROTECTION
AFC
AUDIO OUT SPEAKER
AUDIO R OUT SPEAKER
AUDIO L OUT HP
AUDIO R OUT HP
AUDIO R IN AV-3
AUDIO L IN AV-3
CVBS IN AV-3
S-VHS C IN AV-3
S-VHS Y IN AV-3
BLUE
RED
GREEN
CVBS IN
ENABLE
USART
USART
BLANKING
HS
VS
RESET
RST 2
RST
RGB-S
HS SSCP
VS
VS
TXD
RXD
ENABLE
BLANKING
COR
V-BLK
AGC
MON 1
SDA
COIL
TRAP
4:3
14:9
DGC
IR
MUTE
K1
LED
LS
STBY
L2 FIL
AFC PIN
ABL IN
VM
H OUT
V-DRIVE
E-W
V+ DRIVE
SYNC OUT
HS IN
VS IN
Y OUT
Y IN
R OUT
G OUT
B OUT
1K IN
TO D BOARD
CN902
V+
R
G
B
CUT 0FF
16.9
EW
V-
H OUT
HFBP
EHT
V SYNC
ABL
PROT
AFC
SPL
SPR
DGC
IR
STBY
LS
LED
K1
MUTE
VM
HPR
HPL
R3
L3
V3
Y3
C3
R1
G1
B1
FB1
R2
G1
B1
FB2
FB3
FB2
COR
 CN703
59
SCL
37
A0
35
A1
34
A2
32
A3
31
A4
29
A5
27
A6
25
A7
26
A8
28
A9
33
A10
30
A11
13
A12
24
A13
22
A14
21
A15
36
D7
38
D6
40
D5
42
D4
44
D3
43
D2
41
D1
39
D0
19
A16
18
A17
IC2 NVM
6
SCL
OUT
5
SDA
7
57
56
SDA1
SCL1
4
12
A0
11
A1
10
A2
9
A3
8
A4
7
A5
6
A6
5
A7
27
A8
26
A9
23
A10
25
A11
4
A12
28
A13
29
A14
3
A15
2
A16
30
A17
13
D0
14
D1
15
D2
17
D3
18
D4
19
D5
20
D6
21
D7
IC3
SOFTWARE
17
CVBS OUT
(                  )
1
4
TO D1 BOARD
CN3801
2
3
CN4
4:3
14:9
TO VM BOARD
CN1502
HFBP
ABL
 CN708
1
6
5
CN303
9
SCL
8
SDA
7
I2S CLK
6
I2S NS
5
I2S DA OUT
4
I2S DA IN
D-CTRI
56
L OUT
57
R OUT
14
6
4
8
5
7
1
3
2
6
7
HREQ
RST
SCL
SDA
I2S CLK
I2S WS
I2S DA OUT
I2S DA IN
SP R
SPL
CN202
TO A1 BOARD
CN1202
CN203
TO A1 BOARD
CN1203
34
33
TO
SPEAKERS
CN6201
TO D BOARD
CN1408
S6201
1
3
CN6202
1
3
1
12
CN6206
(      )
J2
INTERNAL
SPEAKER MUTE
SWITCH
CN6205
1
12
L
R
S
C
4
2
S OUT
C OUT
7
11
S IN
C IN
CN6204
3
1
CN6207
6
1
IC6201
EXT L
EXT R
TO A1 BOARD
CN1204
(           )
J1
CENTRE SURROUND
AMP AND EXTERNAL
SPEAKER
CONNECTION
4
5
CN8801
TO D BOARD
CN805
SWITCH
Q8802, 8803
IC8801
SMART MODE
DEFLECTION
H-
D2
(SMART MODE DEFLECTION)
Q8801
H-
SWITCH
SMART CORR
SMART CORR
7
11
12
1
3
2
4
+15V
1
2
3
4
(          )
TO D BOARD
CN801
3
TO VM BOARD
CN1719
CN2804
CN2805
TO VM BOARD
CN1717
6
CN2807
QP OUT
Q2805,Q2806
15V PULSE
QP-
1
3
CN2806
DF
D1
7
2
1
+
-
IC2801
DF/DQP/TIMING
2
3
1
+
-
6
5
7
+9V
TO D BOARD
CN802
DYNAMIC FOCUS OF DQP
4:3 AND 14:9 ASPECT MODE
SWITCHING, SUBWOOFER
AUDIO AMP
STBY
MUTE SW
Q2203
MUTE SW
Q2201, 2202
INPUT
9
10
1
OUTPUT
STBY/
MUTE
MUTE
MUTE SW
SPL
SPR
1
CN2203
TO
SUBWOOFER
IC2201
SUBWOOFER AMP
TO D BOARD
CN1403
CN2202
5
4
3
2
1
6
2
3
4
5
6
1
RELAY SW
Q3801
RELAY SW
Q3802
T3802
T3801
1
4
TO A BOARD
CN4
CN3801
RELAY
RY3802
RELAY
RY3801
+9V
+9V
V-DY+
V-DY-
H-DY-
H-DY-
H-DY+
H-DY+
H-DY+
H-DY+
H-DY-
H-DY-
V-DY-
V-DY+
CN3802
CN3803
TO D BOARD
CN800
H DY
V DY
DY ASSY
V+
V-
H+
H-
IC2803
COMPACTOR
CN1801
VM AMP
Q1701, 1702,
Q1708, 1709
VM
 
(            )
VELOCITY MODULATION &
DYNAMIC CONVERGENCE
VM AMP
BUFFER
Q1704, 1705
VM OUT
Q1703, 1706
NECK ASSY
VM OUT
CN1718
Q.P -
Q.P +
Q.P.
VM
TO
D1 BOARD
CN2807
CN1716
4
TO
D BOARD
CN1401
135V
+9V
1
3
GND
VM
TO
D1 BOARD
CN2805
CN1802
ROT -
ROT +
IC1802
ROTATION AMP
+
-
6
7
5
+
-
2
6
3
TO
ROTATION
COIL
3
4
5
6
CN1717
ROTATION
V-DRIVE IN
V+ SAW
2
3
8
6
5
V SAW
VS IN
REFV
OUT
HDY
CONN
HSTAT
3
2
6
IC1501
CONVERGENCE
CONTROLLER
IC1502
DYNAMIC
CONVERGENCE
CY AMP
Q1505,
1506
4
3
1
ABL
CY+
CY-
CN1502
TO
A BOARD
CN303
1
3
CN1719
5-1.  BLOCK DIAGRAMS (3)
2
3
4
7
CN1202
I2S-DA IN
I2S-WS
125-CLK
RST
HREQ
SCL
SDA
8
6
5
A1 (
DIGITAL AUDIO PROCESS
RAM SURROUND PROCESS
)
1
3
TO A BOARD
CN202
CN1204
SWITCH
Q1201
35
26
43
36
51
55
57
71
69
68
67
65
64
63
62
47
50
7
11
12
13
14
16
18
19
20
22
23
24
25
10
9
8
7
6
5
4
3
25
24
21
23
2
26
1
11
12
13
15
18
19
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A1
0
A1
1
A1
2
A1
3
A1
4
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
D0
D1
D2
D3
D4
D5
D6
D7
IC1202
RAM
1
2
3
IC1207
REGULATOR
+5V
+9V
6
8
LOUT
ROUT
3
2
DATA
WS
1
BCK
49
46
7
1
OUT2
OUT1
6
2
LIN
RIN
6
8
LOUT
ROUT
3
2
DATA
WS
1
BCK
7
1
OUT2
OUT1
6
2
LIN
RIN
CENTRE
SURROUND
TO J1 BOARD
CN4204
6
7
SPLOUT
SPROUT
TO A BOARD
CN203
IC1204
CALIBRATOR
IC1206
OP. AMP
D1201
S-DA0
S-WS2
S-DA1
IC1203
CALIBRATOR
IC1205
OP. AMP
IC1201
DIGITAL AUDIO
PROCESS
HREQ
RST
S-CLK
S-WS1
S-DA2
CN1203
SDA
SCL
HREQ
RESET
S-CLK1
S-WS1
S-DA2
SD01
WST
SCKT
SD00
16
17
4
5
36
35
S5601
POWER
F5601
CN5916
RIGHT AV IN
IC5605
STANDBY
5
4
S
FUNCTION
SWITCH
S5900 - S5902
3
2
IC5900
RECEIVER
RECT
D5642
1
3
13
3
1
9
8
11
TO D BOARD
CN903
CN5903
4
2
3
1
LEFT AV IN
Y IN
H.P.R.
VIDEO
L
R
J5900
H.P.L.
CN5900
1
4
3
6
CN5901
TO D BOARD
CN901
STBY +5V
RESP
D5901
6
2
OPEN
AC IN
AC IN
CN5602
T5602
4
2
1
3
IC5904
1
2
D5604
+5V RECT
+5V
STDBY
5
3
4
7
C IN
H
(                     )
AV INPUT, SIRCS, FRONT AV,
STBY POWER SUPPLY
TO D BOARD
CN602
5-2.  CIRCUIT BOARD LOCATION
5-3.  SCHEMATIC DIAGRAMS AND 
         PRINTED WIRING BOARDS
Note :
•
All capacitors are in µF unless otherwise noted.
•
pF : µµF 50WV or less are not indicated except for 
electrolytic types.
•
Indication of resistance, which does not have one for 
rating electrical power, is as follows.
Pitch : 5mm
Electrical power rating : 1/4W
•
Chip resistors are 1/10W
•
All resistors are in ohms.
k = 1000 ohms, M = 1000,000 ohms
•
: nonflammable resistor.
•
: fusible resistor.
•
: internal component.
•
: panel designation or adjustment for repair.
•
All variable and adjustable resistors have 
characteristic curve B, unless otherwise noted.
•
All voltages are in Volts.
•
Readings are taken with a 10Mohm digital mutimeter.
•
Readings are taken with a color bar input signal.
•
Voltage variations may be noted due to normal production
tolerences.
•
:  B  +  bus.
•
: B - bus.
•
: RF signal path.
•
: earth - ground.
•
: earth - chassis.
Reference Information
RESISTOR
RN
: METAL FILM
RC
: SOLID
FPRD
: NON FLAMMABLE CARBON
FUSE
: NON FLAMMABLE FUSIBLE
RS
: NON FLAMMABLE METAL OXIDE
RB
: NON FLAMMABLE CEMENT
RW
: NON FLAMMABLE WIREWOUND
: ADJUSTMENT RESISTOR
COIL
LF-8L
: MICRO INDUCTOR
CAPACITOR
TA
: TANTALUM
PS
: STYROL
PP
: POLYPROPYLENE
PT
: MYLAR
MPS
: METALIZED POLYESTER
MPP
: METALIZED POLYPROPYLENE
ALB
: BIPOLAR
ALT
: HIGH TEMPERATURE
ALR
: HIGH RIPPLE
Les composants identifiés par une trame et
par une marque      sont d'une importance
critique pour la sécurité. Ne les remplacer
que par des pièces de numéro spécifié.
specified.
Note :
The components identified by shading
and marked      are critical for safety.
Replace only with the part numbers 
specified in the parts list.
Note :
CVM Board
A Board
S1 Board
VM
C
H
D1
A
J
A2
N
D
A1
D2
5-1.  BLOCK DIAGRAMS (4)
C
A1
D
H
VM
D1
A
J1
J2
D2
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