Sony KV-28FX66B Service Manual ▷ View online
- 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 SWTICH
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
B20
12C DISABLE
A20
KEY
A19
TXT VIDEO
B17
V SYNC
A17
H SYNC
B16
LINE MUTE
B15
MODE 2
A15
AV LINK
A14
MODE 1
B13
FS 100
A13
AUDIO MUTE
B12
R TEXT
A12
RESET AUDIO
B11
G TEXT
B10
B TEXT
A9
DGC RY
B8
MAIN RY
A8
COINCIDENCE
B7
OCP
A7
GROUP DELAY
B6
OVP
B5
MODE 3
A5
AGC
B4
SIRCS
A4
LED
B3
SDA
A3
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
SHEET1
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
PICTURE TUBE
CN7301
+12V
R-
TO D 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
TO D BOARD
FV (T6800)
G4
G2
13
H1
3
H1
5
G2
RV7375
CN7300
TO D BOARD
CN6500
FV
J7375
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
CN7001
TO A BOARD
CN2000
TO A BOARD
CN2502
VIDEO
HEADPHONES
R
L
WOOFER MUTE
CN2908
R OUT
R IN
L IN
CN2906
AUDIO L
AUDIO R
Y/CVBS
C
1
2
3
5
6
9
4
2
J2900
1
2
4
3
Y/C
CN2900
H2( )
FRONT AV &
HEADPHONE
J2900
6
L OUT
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
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
Q6802, Q6803
AFC
PULSE
PULSE
TO
A BOARD
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 OV
HPROT
CN6801
2/2
TO
A BOARD
CN5802
DYNAMIC PICTURE
STABILISING CIRCUIT
- 27 -
CN8611
6
4
5
3
2
1
V -
CN8614
TO A BOARD
CN8001
V DY
V- DY+
DY ASSY
V- DY-
H DY
H- DY+
H- DY-
7
3
5
6
12
+200V
T8806
10
V +
H -
H +
H +
H -
1
3
5
TO C BOARD
CN7300
CN8612
V +
V -
CN8810
Q8100,8102
TO A BOARD
CN5801
V STAT
+
-
2
3
COMPARATOR IC8100
1
4
+
-
7
6
8
5
1
2
3
4
H CENTRE
M PIN CONT
1
2
3
4
5
6
7
8
CN8620
DF PARA
MP PARA
E/W
H LIN
H DRIVE
AFC PULSE
ABL
X RAY PROTECT
+
-
2
3
COMPARATOR IC8101
1
4
+
-
7
6
8
5
Q8136,8137
+
-
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
6
8
5
3
1
4
2
T8801
Q8122
H OUT Q8804
PIN OUT Q8803
Q8112
Q8807
Q8123
Q8120
M PIN
CONTROL
Q8805
H LIN
Q8806
+8
+8
HD1
TO A BOARD
CN5002
D ( )
DEFLECTION
D8819
D8808
+15V
D8807
-15V
D8805
9
8
+135V
+9V
5-1. BLOCK DIAGRAMS (3)
DGC
10
+6V
AU (+)
CN6001
RECT
D6102
AC IN
AC IN
TO F4 BOARD
CN6992
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
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
15
16
17
18
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
TO A BOARD
CN6202
6
5
CN6006
AU (+)
+135V
+200V
D6004
Q6104
Q6105
FOR CHECK
+11V
- 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)
CN001
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,
0008
12C SWITCH
(CONNECT
12C BUS 0
AND BUS 1
TOGETHER)
Q0009,
0010
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
78
AV LINK OUT
79
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
CN0101
12C DISABLE
DRIVER (CS)
Q0011
5
95
1
54
1
3
4
CN0002
RF-LED
RF-DATA
RF-KEY
TO L BOARD
CN0701
RF-LED
RF-DATA
RF-ENABLE
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)
VM Board
C Board
A Board
H2 Board
M2 Board
G Board
H1 Board
F4 Board
D2 Board
L Board
D Board
- 29 -
A
B
C
D
E
F
G
H
I
J
K
L
M
N
1
2
3
4
5
6
7
8
9
10
11
O
P
Q
R
S
T
U
V
W
12
13
14
15
16
~
A Schematic [ Video & Audio Processors, Audio Output,
Vertical Deflection] page 1/2~
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