Sony KV-28FQ70B Service Manual ▷ View online
- 25 -
VM
5
4
1
CN7442
QP (+)
QP (-)
4
7
8
2
3
VM
VM
1
QP (+)
QP (+)
QP (-)
QP (-)
VM ( )
VELOCITY
MODULATION
CN7444
QP-
QP+
VM
NECK ASSY
TO A BOARD (1/2)
CN7000
VM AMPLIFIER
BUFFER
Q7408, Q7409
VM AMPLIFIER
BUFFER
Q7400, Q7401
BUFFER
Q7402
BUFFER
Q7404
VM AMPLIFIER
BUFFER
Q7405
VM AMPLIFIER
BUFFER
Q7403
VM AMPLIFIER
OUTPUT
Q7406
VM AMPLIFIER
OUTPUT
Q7407
5-1. BLOCK DIAGRAMS (1)
RIGHT OUT
CN2501
AUDIO PROCESSOR
IC2000
A 1/2 ( )
VIDEO AND AUDIO PROCESSORS,
AUDIO OUTPUT, VERTICAL DEFLECTION
60 MONO IN (AM)
67 IF INI
SCL
3
SDA
37
56
SC1 OUT L
SC1 IN L
2
SC1 OUT R
57 SC1 IN R
36
27
28
30
TO
SPEAKERS
SPEAKER OUT R
SPEAKER OUT L
SUBWOOFER OUT
HEADPHONE
AMPLIFIER
IC2001
5
3
1
7
R
1
4
CN1000
TO A BOARD
SHEET 2
71
72
RIGHT IN
LEFT OUT
LEFT IN
BLUE IN 1
GREEN IN 1
RED IN 1
VIDEO OUT 1
VIDEO IN 1
RIGHT OUT
34
53
SC2 OUT L
SC2 IN L
SC2 OUT R
54 SC2 IN R
33
1
3
2
6
11
7
15
20
19
RIGHT IN
LEFT OUT
LEFT IN
BLUE IN 2
GREEN IN 2
RED IN 2
VIDEO OUT 2
VIDEO IN 2
CN1001 (1/2)
XTAL IN
XTAL OUT
TU1000
SCL
SDA
FM/AM
QSS
VIDEO
SCL
SDA
RIGHT OUT
50 SC3 IN L
51 SC3 IN R
1
3
2
6
19
20
RIGHT IN
LEFT OUT
LEFT IN
VIDEO OUT 2
V/Y IN 3
CN1001 (2/2)
KEY
47
48
1
6
4
9
LEFT
Y/CVBS FRONT
RIGHT
CN2000
FR IN L
FR IN R
LED
2
1 SIRCS
CN0103
BACKEND: DEFLECTION -
RGB PROCESSOR
IC7002
33 YSYM 2
34 B2 IN
G2 IN
36 R2 IN
35
30
26
R OUT
B OUT
FS 100
B TXT
G TXT
R TXT
52 Y1 IN
U IN 100
28
G OUT
53 CB1 IN
54 CR1 IN
HS IN
60 VS IN
59
V IN 100
H SYNC
V SYNC
PIP Y
56 Y2 IN
PIP CB
57 CB2 IN
PIP CR
58 CR2 IN
64
DF PARA
63
EXTRA PARA
1
EW OUT
17
HD OUT
18
HP IN
20
X RAY IN
5
VDP OUT
6
VDN OUT
16
VPROT
45
VM OUT
AUDIO AMPLIFIER
IC2500
5
IN R
1
IN L
IN W
9
MUTE W
6
12
3
OUT R
OUT W
RIGHT
LEFT
WOOFER
10 MUTE
14
OUT L
DF PARA
MP PARA
E/W
H DRIVE
AFC PULSE
X RAY
PART OF
V PROT
Q5400
Q5401
Q5401
V OUT IC5400
1
7
DAC IC5103
3
7
DF PHOCUS PHASE
M PIN CONT
OP. AMP IC5104
1
4
ROT -
ROT+
5
3
6
OP. AMP IC5301
7
6
COMPARATOR IC5302
1
VM
1
7
AFC PULSE
X RAY
6
5
3
2
H DRIVE
E/W
MP PARA
DF PARA
1
6
B-
B+
5
4
3
2
G+
G-
R+
R-
3
H CENTRE
4
2
M PIN CONT
DF DRIVE
1
3
ROT-
ROT+
1
WOOFER
2
6
R OUT
L OUT
5
L IN
3
R IN
CN2502
TO
SUBWOOFER
TO H1 BOARD
CN2910
CN2500
CN5100
TO
ROTATION
COIL
CN5002
TO D BOARD
CN8810
CN7001
TO C BOARD
CN7301
TO D BOARD
CN8620
TO VM BOARD
CN7442
R OUT
L OUT
J2000
L
CN7000
CN5801
TO F1 BOARD
CN0981
TO H1 BOARD
CN2909
Y IN 100
5
6
7
8
ABL
CN5802
TO D2 BOARD
CN6801
NC/X RAY
AFC PULSE
3
DF DRIVE
ABL
10
WOOFER MUTE
WOOFER MUTE
1
BUFFER
Q5305, Q5306
IC5300
LM358N
QP(-)
QP(+)
6
8
+12V
4
5
PROTECTOR
PS2501
6
5
AU(+)
AU(+)
CN6202
TO G BOARD
CN6006
AUDIO VCC
GND
POWER
S6400
2
1
5
1
F1
( )
POWER SWITCH,
FUSE, SIRCS AND
STAND-BY LED
CN6400
AC
IN
TO G BOARD
CN6001
STB +5V
1
2
CN6401
CN0981
TO A BOARD (1/2)
CN0103
LED
SIRCS
OUT
IC0981
RPM7240-H5F
- 26 -
5-1. BLOCK DIAGRAMS (2)
Y IN 100
BLK 100
H SYNC
V SYNC
RED IN 1
GREEN IN 1
BLUE IN 1
RED IN 2
VIDEO RF
V IN 1
BLK 1
BLK 2
GREEN IN 2
BLUE IN 2
100Hz BUFFER
Y SCAN RATE
BACKEND
Q3300
CN0101
SCAN RATE CONVERTER,
COLOUR DECODER AND I/O
VIDEO SWITCH
IC3200
A 2/2 ( )
VIDEO AND AUDIO PROCESSORS,
AUDIO OUTPUT, VERTICAL DEFLECTION
2
AY OUT 100
8
NC
H OUT 100
23 V OUT 100
39
40
41
R IN 1
46
G IN 1
47
B IN 1
48
R IN 2
52 CVBS 1
CVBS 2
5
AGC
17
FBL 1
38 FBL 2
37
G IN 2
B IN 2
79
76
70
69
63
62
61
58
57
56
55
54
TO G BOARD
CN6008
AU OUT 100
AY OUT 100
X IN
CVBS OUT 2
CVBS OUT 3
CVBS 7
CVBS 6
CVBS 3
X OUT
CVBS OUT 1
CVBS 5
CVBS 4
53
CVBS PIP
C FRONT
Y/CVBS FRONT
V IN 2
C IN 3
V/Y IN 3
100Hz BUFFER
U SCAN RATE
BACKEND
Q3302
4
CS
3
SDA
2
SCL
7
12C DISABLE
KEY
TXT VIDEO
V SYNC
H SYNC
LINE MUTE
MODE 2
AV LINK
MODE 1
FS 100
AUDIO MUTE
R TEXT
RESET AUDIO
G TEXT
B TEXT
DGC RY
MAIN RY
COINCIDENCE
OCP
GROUP DELAY
OVP
MODE 3
AGC
SIRCS
LED
SDA
SCL
PART OF
OVERVOLTAGE
PROTECTION
Q5816
COINCIDENCE
DETECTOR
Q1005
VIDEO RF
CVBS TXT
V SYNC
H SYNC
12 C ADAPTOR
5V - 3.3V
Q3500
12 C ADAPTOR
5V - 3.3V
Q3501
OVP
+3.3V
2
1
CN6200
TO M2 BOARD
CN0001
CN0102
SERVICE CONNECTOR
TO A BOARD
SHEET 1
6dB AMPLIFIER
FOR THE
SELECTABLE
OUTPUT CVBS
(3RD SCART)
Q3200
6dB AMPLIFIER
FOR THE
SELECTABLE
OUTPUT CVBS
(3RD SCART)
Q3202
100Hz BUFFER
U SCAN RATE
BACKEND
Q3301
6dB AMPLIFIER
FOR THE
MONITOR
OUTPUT CVBS
(2ND SCART)
Q3204
V OUT 3
6dB AMPLIFIER
FOR THE
MONITOR
OUTPUT CVBS
(2ND SCART)
Q3201
V OUT 2
V IN 100
U IN 100
39
21
16
17
37
34
5
35
12
36
18
22
19
20
14
13
15
23
11
25
6
40
10
24
9
8
DYNAMIC
FOCUS
T8901
D2 ( )
14
G2
16
FV
1
18
19
12
15
13
HV
17
8
9
7
10
5
6
4
3
11
HV OVERSHOOT
PROJECT
Q6816, Q6817
SS RESET
Q6814,
Q6813
ABL
PROTECT
Q6807
6
1
3
DYNAMIC
FOCUS
Q8918
5
7
6
UNDER VOLTAGE
PROTECT
Q6808
4
3
200V
1
3
2
7
5
6
1
2
3
BUFFER
Q6803
16
12
1
9
15
2
200V
Q6804,
Q6805
Q8909
AFC
PULSE
DETECT
Q6801,
Q6802
AFC PULSE
TO A BOARD (1/2)
CN5802
CN6801
1/2
V SENSE
F/B
VG(H)
VS
VG(L)
IC6800
DF DRIVE
ABL
8
7
6
IC6801
IC6807
IC6803
CATHODE
REF
IC6802
T6800
4
5
HOP OVP
HPROT
CN6801
2/2
TO A BOARD (1/2)
CN5802
DYNAMIC PICTURE
STABILISING CIRCUIT
1
RY SIGNAL
CN6804
TO M2 BOARD
CN0003
TO A BOARD (1/2)
CN2000
TO A BOARD (1/2)
CN2502
VIDEO
HEADPHONES
R
L
WOOFER MUTE
CN2910
R OUT
R IN
L IN
CN2909
AUDIO L
AUDIO R
Y/CVBS
C
1
2
3
5
6
9
4
2
J2901
1
2
4
3
Y/C
CN2900
H1( )
FRONT AV INPUT,
HEADPHONE AND
HEADPHONE AND
CONTROL SWITCHES
6
L OUT
1
S0900 - S0905
PICTURE TUBE
CN7301
+12V
R-
TO D2 BOARD
HV (T6800)
R
G
B
HV
VOLTAGE DET
Q7354, 7350
8
VO
IC7350
VIDEO OUT (BLUE)
8
VO
IC7325
VIDEO OUT (GREEN)
1
VB
8
VO
IC7300
VIDEO OUT (RED)
8
9
10
13
5
HEATER
5
G2
RV7375
CN7300
TO D BOARD
CN8614
J7376
C
(
)
R, G, B OUT
3
VI
5
IK
1
VB
3
VI
5
IK
1
VB
3
VI
5
IK
STANBY SW
Q7353
1
2
3
4
5
6
9
STANBY SW
Q7352
STANBY SW
Q7355
R+
G-
G+
B-
B+
IK
TO A BOARD (1/2)
CN7001
- 27 -
CN8611
6
4
5
3
2
1
V -
TO A BOARD (1/2)
CN8001
V DY
V- DY+
DY ASSY
V- DY-
H DY
H- DY+
H- DY-
3
5
6
+200V
T8806
V +
H -
H +
H +
H -
1
3
CN8612
V +
V -
CN8810
TO A BOARD (1/2)
CN5801
V STAT
+
-
2
3
COMPARATOR IC8100
1
4
+
-
7
8
5
1
3
4
H CENTRE
M PIN CONT
2
3
4
5
6
7
8
CN8620
MP PARA
E/W
H LIN
H DRIVE
AFC PULSE
ABL
X RAY PROTECT
+
-
2
3
COMPARATOR IC8101
1
4
+
-
7
8
+
-
2
3
COMPARATOR IC8103
1
4
+
-
7
6
8
5
Q8201,
8202,8118
3
1
4
2
T8802
+
-
2
3
OP. AMP IC8102
1
4
+
-
7
8
5
3
1
4
2
T8801
Q8122
H OUT Q8804
PIN OUT Q8803
Q8112
Q8123
Q8120
M PIN
CONTROL
Q8805
H LIN
Q8806
+8
+8
HD1
TO A BOARD (1/2)
CN5002
D ( )
DEFLECTION
D8819
+15V
-15V
D8805
Q8136,8137
6
Q8807
5
Q8100,8102
6
6
8
9
10
12
7
D8808
D8807
D8859
HEATER
CN8614
TO C BOARD
CN7300
5
+135V
VCC
VCC
VCC
5-1. BLOCK DIAGRAMS (3)
DGC
10
+6V
AU (+)
CN6001
RECT
D6102
AC IN
AC IN
TO F1 BOARD
CN6401
G ( )
POWER
SUPPLY
1
5
CN6002
CHECK
CHECK
1
2
1
2
3
CN6003
CN6004
PFC
PFC
1
3
CN6008
MAIN RY
DGC RY
TO A BOARD (2/2)
CN6200
1
2
DGC
DGC
3
1
T6003
4
2
3
1
T6101
4
2
9
7
8
RELAY
SWITCH
Q6103
11
12
13
14
16
1
2
3
7
9
6
8
IC6001
MAIN BRIDGE
RECTIFIER
1
V SENSE
2
F/B
CT
4
RT
8
9
VC 1
OCP
3
TIMER
7
SS
6
18
16
15
14
12
10
VD
VG
VG (L)
VC 2
VS
VB
RELAY
SWITCH
Q6101
RELAY
RY6001
RELAY
RY6002
MAIN RECT
D6001
MOSFET
TRANSISTOR
USED BY
SWITCHING
CIRCUIT Q6006
MOSFET
TRANSISTOR
USED BY
SWITCHING
CIRCUIT Q6007
1
2
4
3
PH6001
T6002
RECT
D6010
RECT
D6016
1
2
IC6003
ERROR AMPLIFIER
TO A BOARD
CN6202
6
5
CN6006
AU (+)
+135V
+200V
D6004
Q6104
Q6105
FOR CHECK
+11V
15
17
18
D6031
D6033
D6034
D6032
- 28 -
5-2. CIRCUIT BOARD LOCATION
5-3. SCHEMATIC DIAGRAMS AND
PRINTED WIRING BOARDS
PRINTED WIRING BOARDS
Note :
•
All capacitors are in µF unless otherwise noted.
•
pF : µµF 50WV or less are not indicated except for
electrolytic types.
electrolytic types.
•
Indication of resistance, which does not have one for
rating electrical power, is as follows.
rating electrical power, is as follows.
Pitch : 5mm
Electrical power rating : 1/4W
Electrical power rating : 1/4W
•
Chip resistors are 1/10W
•
All resistors are in ohms.
k = 1000 ohms, M = 1000,000 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.
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.
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.
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.
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
C
A
5-1. BLOCK DIAGRAMS (4)
A(0)
A(1)
A(2)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
A(10)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
CN0001
MICRO CONTROLLER
IC0002
M2 ( )
MICRO PROCESSOR
NVM
MEMORY
IC0001
5
8
SCL
7
6
9
SDA
28
24
LED
LED
76
10
SIRCS
SIRCS
AGC
AGC
22
40
MODE 3
AGC
29
25
OVP
80
11
GROUP DELAY
24
23
OCP
OVP/OCP
59
15
COINCIDENCE
GROUP DELAY
17
13
MAIN RY
OCP FLAG
16
14
DGC RY/AC ON-OFF
COINDIDENCE
46
20
B TEXT
B TEXT
47
19
G TEXT
G TEXT
25
22
RESET AUDIO
RESET AUDIO
48
18
R TEXT
R TEXT
13
36
AUDIO MUTE
AUDIO MUTE
COR*
12
FS 100
52
VDS
4
35
MODE 1
MODE 1
AV LINK
2
34
MODE 2
MODE 2
18
37
LINE MUTE
MUTE LINE
53
17
H SYNC
H SYNC
55
16
V SYNC
V SYNC
32
21
TXT VIDEO
TXT VIDEO
96
38
RESET 100
RESET 100
5
39
KEY
KEY
97
7
12C DISABLE
12C DISABLE
82 SDA 0
81 SCL 0
83 SCL 1
84 SDA 1
71
70
6
MODE 3 (1)
94
6
MODE 3 (2)
93
MAIN RY
DGC RY/AC ON-OFF
43
MAIN RELAY DRIVER Q0002
DEGAUSING COIL RELAY
DRIVER Q0003
12C SWITCH
(CONNECT
12C BUS 0
AND BUS 1
TOGETHER)
Q0007,
Q0008
12C SWITCH
(CONNECT
12C BUS 0
AND BUS 1
TOGETHER)
Q0009,
Q0010
69
49
A(0)
40
A(1)
39
A(2)
38
A(3)
27
A(4)
26
A(5)
23
A(6)
15
A(7)
67
A(8)
66
A(9)
65
A(10)
64
A(11)
37
A(12)
36
A(13)
8
A(14)
33
A(15)
51
A(16)
50
A(17)
9
RD*
10
WR*
98
NVM WL*
73
RESET
AV LINK OUT
AV LINK IN
85
D(0)
86
D(1)
87
D(2)
88
D(3)
89
D(4)
90
D(5)
91
D(6)
92
D(7)
SRAM (TELETEXT
PAGES STORAGE)
IC0005
20
19
18
17
16
15
14
13
3
2
31
1
12
4
11
7
10
9
32
5
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
21
22
23
25
26
27
28
29
SWITCH
NVM WC* CONTROL
DURING RESET Q0013
-
+
2
3
COMPARATOR
(AV-LINK CIRCUIT)
IC0004
1
4
+
-
7
6
8
5
RESET
CIRCUIT
IC0003
3
TO A BOARD (2/2)
CN0101
12C DISABLE
DRIVER (CS)
Q0011
5
IC0006
12
11
10
9
8
7
6
5
27
26
23
25
4
28
29
3
2
1
13
14
15
17
18
19
20
21
A(0)
A(1)
A(2)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
A(10)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
A(17)-LN
ABK(15)
ABK(16)
1
CN0003
RY SIGNAL
TO D2 BOARD
CN6804
78
79
58
57
10
IC0010
AMPLIFIERS
2
1
2
4
IC0007
BUFFER AMPLIFIER
IC0008
COMPARATOR
4
ROMBK.1
ROMBK.0
12
9
11
8
ABK(16)
ABK(15)
A(15)
VM Board
C Board
A Board
M2 Board
G Board
F1 Board
D2 Board
D Board
H1 Board
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