Sony KV-28DC20B Service Manual ▷ View online
29
30
31
32
5-1. BLOCK DIAGRAMS (1)
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
CN5601
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
RV701
H STAT
CN701
R
G
IK
B
R
G
B
1
2
6
3
C
(RGB DRIVE)
TO D BOARD
FV (T803)
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 (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
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
DIGITAL SIGNAL 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
11
12
20
19
1
IC302
BASE BAND DELAY-LINE
IC303
SECAM DECODER
23
27
29
TV IN
IC201
VIDEO SWITCH
25
21
20
3
4
6
31
5
7
1
15
10
22
26
IC301
Y/C JUNGLE
1
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 O
U
T
B-Y IN
B-Y IN
B-Y O
U
T
B-Y O
U
T
C
V
BS IN
SSC
P IN
ID
EN
T
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
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
SECAM REF
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
MEGA 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
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
KV-28DX20U/32DX20UONLY
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
CN900
J3
( )
CN901
16
36
30
35
42
3
5
10
17
29
38
39
34
41
6
3
1
4
IC901
SMART CARD
READER
C2 (3)
C3 (5)
SW(10)
RST
CLK
PRES
26
17
10
16
20
19
23
3
24
11
RFU1
40
PRESN
PRES
VDDP
I_OUC
S2
INT1
P36
P37
P11
P10
CLKOUT
RESET
TX
RX
CN902
8
5
6
3
10
14
2
9
NC1
CMDVCC
N
CLK
AUX1
AUX2
6
5
4
CN951
TX
RX
RESET
SW
C5
SW
C6
C1
C2
C7
B8
B3
B7
B2
SMART CARD AND
BANK CARD DECODER
IC902
BANK CARD
READER
TO A2 BOARD
CN4002
CARD READER
CARD READER
CN4701
J4
( )
SEVEN SEGMENT
DISPLAY
TO
A2 BOARD
CN4601
CN4701
13
7
12
10
6
2
3
4
5
11
12
13
14
9
4
5
1
3
8
11
ANODE
SWITCH
Q4712
ANODE
SWITCH
Q4713
ANODE
SWITCH
Q4710
ANODE
SWITCH
Q4706
ANODE
SWITCH
Q4707
ANODE
SWITCH
Q4708
ANODE
SWITCH
Q4709
ANODE
SWITCH
Q4711
2
CATHODE
SWITCH
Q4701
6
CATHODE
SWITCH
Q4702
7
CATHODE
SWITCH
Q4703
8
CATHODE
SWITCH
Q4704
9
CATHODE
SWITCH
Q4705
10
TO
A2 BOARD
CN4601
DISP +5V
D4704
SEVEN
SEGMENT
DISPLAY
P1.1
P1.2
P1.3
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P1.4
P1.0
P2.7
CN4301
J5
( )
DIGITAL AUDIO
OUTPUT
TO
A2 BOARD
CN4006
CN4301
12
10
IC4301
OPTO AUDIO
OUT
SPDIF
+5V
TO
A2 BOARD
CN4006
A
[ SIGNAL PROCESSING ]
C
[ R,G,B DRIVE ]
H
[ AV INPUT, STBY POWER SUPPLY ]
J4
[ 7 SEGMENT DISPLAY ]
J3
[ SMART CARD, BANK CARD DECODER ]
J5
[ DIGITAL OPTICAL AUDIO OUTPUT ]
33
34
36
35
5-1. BLOCK DIAGRAMS (2)
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-PL
S
V O
U
T
Vc
c
O
U
T
V -
I/P
T800
PMT
PMT
L804
HLC
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
OPEN
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
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
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
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
IC2803
7
2
1
+
-
IC2801
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
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-
CN1801
VM AMP
Q1701, 1702,
Q1708, 1709
VM
( )
VELOCITY MODULATION &
DYNAMIC CONVERGENCE
DYNAMIC CONVERGENCE
VM AMP
BUFFER
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
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
D
[ DEFLECTION AND POWER SUPPLY ]
VM
[ VELOCITY MODULATION AND DYNAMIC CONVERGENCE ]
D2
[ SMART MODE DEFLECTION ]
D1
[ DYNAMIC FOCUS OF DQP & SUBWOOFER AUDIO AMP ]
37
38
39
40
5-1. BLOCK DIAGRAMS (3)
CN3501
TO A2 BOARD
CN4003
CN3500
DATA (7)
DATA (6)
DATA (5)
DATA (4)
DATA (3)
DATA (2)
DATA (1)
DATA (0)
A10
B10
A11
B11
A12
B12
A13
B13
A8
PTEN
IC3203
OP AMP
2
SD
14
2
6
IC3205
AUDIO D/A
A OUT R
A OUT L
1
14
6
9
B22
A14
53
~
57
.
60
~
69
.
72
HD15
HD0
IC3102
DC MULTIPLEXER AND GRAPHICS
149
CHDATA0
CHDATA7
75
.
76
.
80
~
99
HA22
HA1
121
~
128
RESET
TTXRQ
TTX0
117
IC3204
MPEG VIDEO DECODER
MADDR(8)
MADDR(0)
MDA(0) - MDA(8)
MDAH(4)
66
MCAS0
65
63
MRAS0
64
MCAS1
108
107
SPDIF
99
RESET
119
D(16)-D(31)
IC3206
DRAM
17
26
18
19
25
24
23
22
MWE
MDA(4)
MDA(3)
MDA(2)
MDA(5)
MDA(6)
MDA(7)
MDA(1)
MDA(0)
MDA(8)
16
SDA-STBY
DATA(0) - DATA(7)
A(1)-A(22)
YUVENC(0)-YUVENC(7)
IC3104
16M EDO RAM
22
.
25
.
28
~
31
A23
VDOUT(7)
VDOUT(0)
138
~
135
.
132
~
129
CAVDATA(0)
CAVDATA(7)
CADEN
CVDEN
152
151
VIDEO STROBE
AUDIO STROBE
114
115
VDIN7
VDIN0
141
~
148
SD_DATA(0)
SD_DATA(7)
150
CVDREQ
CADREQ
VREQ#
AREQ#
AVALID
VVALID
167
165
163
165
163
.161
160
162
164
166
169
170
162
164
166
169
170
DA0
DA9
20
.
17
~
19
.
24
~
28
.
23
73
74
75
100
101
102
103
R/W
IRQ6#
IRQ7#
HLDS#
CS3#
DMUXACK#
HUDS#
R/W
DMXIRQ0
DMXIRQ1
HUDS
HLDS
NCS
ADTACK
176
174
175
DWE
DCAS1
DCAS0
119
CHDEN
PTEN
172
DRAS0
14
13
30
31
WE
UCAS
LCAS
RAS
195
193
191
188
186
183
181
179
177
180
182
185
187
189
192
194
193
191
188
186
183
181
179
177
180
182
185
187
189
192
194
DD0
DD15
2
~
5
~
5
.
7
~
~
10
.
33
~
36
.
38
~
41
MA0
MA9
MD(0) - MD(15)
MA(0) - MA(9)
MD0
MD15
MADDRH(1)
MADDRH(4)
60
~
53
.
51
~
49
.
47
.
46
.
44
.
42
.
41
.
39
~
35
.
33
~
31
.
29
~
20
.
18
.
17
.
15
.
14
.
12
.
10
~
4
4
.
2
.
160
~
151
.
149
.
147
.
145
.
143
~
140
72
.
78
.
67
.
69
.
70
.
71
.
73
.
74
.
76
.
79
.
80
MDAH(1)
IC3207
DRAM
17
26
18
19
25
24
23
22
MDA(4)
MDA(3)
MDA(2)
MDA(5)
MDA(6)
MDA(7)
MDA(1)
MDA(0)
MDA(8)
16
IC3208
DRAM
MDA(5)
IC3209
DRAM
28
13
14
28
13
14
28
13
14
17
26
18
19
25
24
23
22
MDAH(4)
MDA(3)
MDA(2)
MDA(6)
MDA(7)
MDAH(1)
MDA(0)
MDA(8)
16
MDA(5)
28
13
14
17
26
18
19
25
24
23
22
MDAH(4)
MDA(3)
MDA(2)
MDA(6)
MDA(7)
MDAH(1)
MDA(0)
MDA(8)
16
31
~
34
.
36
~
39
.
10
~
7
7
.
5
~
2
~
2
31
~
34
.
36
~
39
.
10
~
7
7
.
5
~
2
~
2
DO(0)
DO(15)
DO(16)
DO(31)
DO(32)
DO(47)
DO(48)
DO(63)
39
~
36
.
34
~
31
.
2
~
5
~
5
.
7
~
~
10
39
~
36
.
34
~
31
.
2
~
5
~
5
.
7
~
~
10
113
VIDEO REQ
118
AUDIO REQ
RESET#
RESET#
100
.
101
.
103
~
105
.
107
.
109
.
111
VDATA(0)
VDATA(7)
83
~
86
.
88
~
91
A22
SPDIF
UCAS
WE
RAS
MCAS1
MCAS0
UCAS
WE
RAS
MCAS0
WE
MRAS0
MCAS1
WE
MRAS0
MCAS0
WE
MRAS0
MCAS1
WE
MRAS0
WE
MRAS0
UCAS
WE
RAS
UCAS
WE
RAS
DO(0)
DO(63)
95
96
97
98
GA_DATA
DA_LACK
DA_BCK
SD
WS
SCK
DA_XCK
FSCLK
1
3
WS
SCK
B-IN
A-IN
DAC-R
DAC-L
ENCVSYNC
ENCHSYNC
33
32
HSYNC
VSYNC
93
92
FIELD
HSYNC
135
130
131
133
CS5#
IRQ5#
AVDTACK
R/W
CS
HADDR0
R/W
INT
DTACK
HADDR2
HDATA(0)
HDATA(7)
120
.
121
.
123
~
126
.
128
.
129
D(24)-D(31)
IC3401
SERIAL/PARALLEL
CONTROLLER
55
16
17
20
A0
A6
DO
D
15
9
~
2
~
2
.
99
~
92
D(16)-D(31)
90
~
84
A(1)-A(7)
TXD3
RXD3
DTR3
B18
A19
A21
TXD
RXD
23
DSR3
B19
DTR
DSR
57
54
GP3
GP6
GP7
GP5
A24
B24
A25
B25
LNBOVR#
18/13V
TONE_GATE
LNBON
53
79
RESET
A7
RESET#
58
GP2
B7
CARLOCK
B15
1
3
G1
D3500
A16
B16
A17
IC3200
RGB/VIDEO SWITCH
23
R(Cr)
29
B(Cb)
26
G(Y)
30
CVBS
R1
G1
B1
CVBS
5
B1
4
CVBS
R1
4
SDA
3
2Z
1
1Y
VREF
IC3501
STBY SWITCH
A1
B1
SCL-STBY
SDA-STBY
6
SCL
5
SDA
IC3502
2
SCL
13
1E
5
2E
Q3517
STBY +5V
IC3601
FP MICRO
49
50
52
P0.0
P0.1
P0.3
IC3604
RESET
1
2
64
RES
CO
OUT
1
TPOUT
7
S10
5
CS
6
SCK
IC3602
51
P0.2
23
SCL
24
SDA
10
P4.1
9
P4.0
30
P7.7
60
IR OUT
SCL-STBY
SDA-STBY
FPREQ
STBY
POWER-ON#
IR-DET
WATCHDOG
B8
A7
A2
B7
SCL
SDA
8
VCC
STBY
IC3500
AV SWITCH
22
SDA
51
VREF
A15
B14
Q3508
17
FBOUT_TV
FAST BLANKING
MODE
25
SLB_TV
21
SCL
SCL-STBY
TXD
RXD
DTR
DSR
LNBOVR#
18/13V
TONE_GATE
LNBON
RESET#
CARLOCK
R1
G1
B1
CVBS
AVALID
VVALID
FIELD
HSYNC
137
~
139
A(1)-A(3)
16
~
9
9
MP0
MP7
YUVGA(0) - YUVGA(7)
RESN
40
RESET#
RCV1
RCV2
7
8
FIELD
HSYNC
CTS2
RTS2
CD2
TXD2
RXD2
GP1
27
26
29
18
19
59
2
5
8
1
3
6
4
7
CN3400
MODEM
OUT
TTXRQ
TTX
43
44
TTX
TTXRQ
TTX0
TTXRQ
SCL
41
SCL
SDA
42
SDA
LLC1
8
CLK27M
SYSCLK
117
CLK27M
B10
A8
B4
TS-SELECT (HIGH)
A4
+3.3V
A9
IRD-MASTER-RESET
TS-SELECT(HIGH)
IRQ1#
IRQ4#
IRQ1# - IRQ4#
13
75
76
12
DMAREQ#
R/W
PIODAK#
DMAACK#
DMAREQ
R/W
DTACK
DMAACK
66
.
68
.
63
.
61
RESET#
IRQ1# - IRQ4#
B17
DAC-L
A18
DAC-R
CARD-RESET
CARD-TX
CARD-RX
B4
B10
A11
78
CS2#
CS
+5v
RESET#
R/W
N( )
1/2
A
TO N BOARD
(2/2)
B
TO N BOARD
(2/2)
C
TO N BOARD
(2/2)
D
TO N BOARD
(2/2)
E
TO N BOARD
(2/2)
F
TO N BOARD
(2/2)
G
TO N BOARD
(2/2)
TO A2 BOARD
CN4004
N
[ 1/2 DIGITAL PROCESSING ]
41
42
44
43
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
5-1. BLOCK DIAGRAMS (4)
VM
C
H
D1
D
A
J5
A2
N
J4
J3
D2
B6
PP7/PST3
PP6/PST2
PP3/DDATA3
PP2/DDATA3
TMS/BKPT
TRST/DSCLK
TD0/DS0
TD1/DS1
PP5/PST1
PP4/PST0
PP1/DDATA3
PP0/DDATA0
136
45
WEI
CS2
RXD2
TXD2
38
64
63
61
IPL0
IPL1
ATA
RST0
A25/CSS
IC3302
CPU
HLDS#
CARD-RX
CARD-TX
159
158
157
156
154
153
152
151
126
124
121
127
137
A7
B7
A8
B8
A9
B9
A10
PP6/PST2
PP5/PST1
PP2/DDATA2
PP7/PST3
PP3/DDATA3
PP4/PST0
PP1/DDATA1
PP0/DDATA0
PP7/PST3
PP6/PST2
PP3/DDATA3
PP2/DDATA2
PP5/PST1
PP4/PST0
PP1/DDATA1
PP0/DDATA0
B4
B5
B2
B1
59
IC3312
8 MBIT FLASH
28
OE
12
11
RESET
WE
29
.
31
.
33
.
35
.
38
.
40
.
42
.
44
.
30
.
32
.
34
.
36
.
39
.
41
.
43
.
45
D16
D31
25
~
18
.
8
~
1
~
1
.
48
.
17
.
16
A0
A19
IC3307
8 MBIT FLASH
28
OE
12
11
RESET
/WE
45
.
43
.
41
.
39
.
36
.
34
.
32
.
30
.
44
.
42
.
40
.
38
.
35
.
33
.
31
.
29
D16
D31
25
~
18
.
8
~
1
~
1
.
48
.
17
.
16
A0
A19
D(0)-D(15)
D(16)-D(31)
120
.
119
.
117
~
115
.
113
~
111
.
109
~
107
.
105
~
103
.
101
~
99
.
97
~
95
.
93
~
91
.
89
~
87
.
85
~
83
.
81
~
79
DO
D31
D(0)-D(31)
78
DRAMW
76
CAS3
75
CAS2
74
CAS1
72
CAS0
70
RASO
DWE
CAS3
CAS2
CAS1
CAS0
RAS
2
.
4
.
5
.
7
.
8
.
10
.
11
.
13
.
14
.
16
.
17
.
19
.
20
.
22
.
23
25
.
26
.
28
.
29
.
31
.
32
.
34
A(1)
A(22)
A(1)-A(22)
IC3303
16 MBIT EDO DRAM LOWER
13
31
/WE
/LCAS
41
~
38
.
36
~
33
.
10
~
7
7
.
5
~
2
~
2
A0
A9
30
14
/UCAS
/RAS
DQ16
DQ1
DWE
CAS3
CAS2
RAS
IC3304
16 MBIT EDO DRAM UPPER
13
31
/WE
/LCAS
41
~
38
.
36
~
33
.
10
~
7
7
.
5
~
2
~
2
A0
A9
30
14
/UCAS
/RAS
DQ16
DQ1
DWE
CAS1
CAS0
RAS
IC3300
RESET
RESET
1
2
+5V
A(9)-A(15), A(17), A(19), A(21)
A(2)-A(21)
A(2)-A(21)
A4
RESET#
CN3301
RSTI
N( )
2/2
D(0)-D(15)
D(16)-D(31)
46
CS3
B12
CLK
135
A(9)-A(21)
A(9)-A(21)
IC3315
GP OUT BY LATCH
1
4
9
1
2
5
10
13
12
11
4Y
3A
2A
1A
1B
2B
3B
4B
4A
IC3316
GP INPUT BY LATCH
1
5
12
4
2
7
10
15
13
3
8
3Y
1Y
3D
2D
1D
1Q
2Q
3Q
4Q
4D
DEMUXACK#
6
2Y
CS3#
CS2#
CS5#
5
IC3305
DTACK COMBINER
&IRQ3 AT RESET
2
11
1
12
6
13
2Y
4B
4A
4Y
1A
1B
2B
133
RST0#
IC3306
INTERRUPT
ENCODER
1
12
11
13
7
01
4B
I4
I2
I1
62
IPL2
9
00
6
02
9
CLK
Q3300
CARD-RESET
IC3313
FLASH OP ENABLE
11
12
6
2A
4Y
4A
IC3314
4 MBIT FLASH
28
OE
12
11
RESET
/WE
45
.
43
.
41
.
39
.
36
.
34
.
32
.
30
.
44
.
42
.
40
.
38
.
35
.
33
.
31
.
29
D16
D31
25
~
18
.
8
~
1
~
1
.
48
.
17
.
16
A0
A19
D(16)-D(31)
A(1)-A(20)
AVDTACK#
PIODAK#
IRQ3#
Q3301
SW RESET
CONTROL
3
Q3302
IRD_MASTER_RESET
R/W
4
3
2
I7
I6
I5
IRQ7#
IRQ6#
IRQ5#
IRQ4#
IRQ2#
IRQ1#
45
CS4
41
WE0
46
CS0
HUDS#
HUDS#
26
26
26
17
~
19
.
23
~
28
.
16
17
~
19
.
23
~
28
.
16
TIN1/DREQ0
DMAREQ#
143
43
DMAACK#
40
CS1
D(24)-D(31)
CE
CE
CE
CS0#
CS0#
CS0#
CS4#
CS4#
RESET#
A
TO N BOARD
(1/2)
B
TO N BOARD
(1/2)
D
TO N BOARD
(1/2)
F
TO N BOARD
(1/2)
G
TO N BOARD
(1/2)
E
TO N BOARD
(1/2)
C
TO N BOARD
(1/2)
B
TO N BOARD
(1/2)
D
F
SOFTWARE
DOWNLOAD &
TEST CONNECTOR
10
IC4009
RGB SWITCH
8
11
6
7
B2 IN
B OUT
G2 IN
G OUT
A2
( )
DIGITAL INTERFACE DOLBY CENTRE
AND SURROUND AMPLIFIER
AND SURROUND AMPLIFIER
6
4
3
1
CN4009
D. LEFT OUT
D. CVBS OUT
R FRONT IN
L FRONT IN
L2 IN
R2 IN
V2 IN
CN4010
B OUT
G OUT
R OUT
FB OUT
FB1 IN
B1 IN
G1 IN
R1 IN
1
5
2
4
6
8
10
12
14
15
9
11
13
A24
A25
B25
B24
A7
B4
B5
4
5
6
12
13
15
4
2
3
5
4
IC4005
PORT EXPANDER
2
R2 IN
B1 IN
G1 IN
R1 IN
SEL
R OUT
FB OUT
FB1 IN
14
FB2 IN
O/P
WATCHDOG
39
IC4601
AUDIO/VIDEO SWITCH
40
L3 OUT
V3 OUT
16
18
15
R3 IN
L2 IN
V2 IN
R2 IN
8
9
SDA
SCL
PSYNC
PTCK
RESET
RXD
TXD
TXD
RXD
RESET
CN4002
38
SDA
36
SCL
42
CLR#
SDA D
SCL D
TU4003
CN4003
41
8
D. RIGHT OUT
L2 OUT
R2 OUT
L3 OUT
R3 OUT
R3 OUT
DATA 7
DATA 6
DATA 5
DATA 4
DATA 3
DATA 2
DATA 1
DATA 0
A10
B10
A11
B11
A12
B12
A13
B13
24
DATA4
18
DATA1
20
DATA2
22
DATA3
16
DATA0
D4
D1
D2
D3
D0
26
28
DATA5
DATA6
30
DATA7
D5
D6
D7
A8
A9
B9
34
32
PSYNC
PCLK
48
DEN
PTEN
PSYNC
PTCK
PTEN
LOCK
B7
45
FEL
LOCK
A5
18/13V
ON/OFF
TONE
OVL
B22
A23
SDA-D
SCL-D
FE-RESET
IC4008
PI/PA
FE-RESET
LNB OVR
LNB 18/13
LNB TONE
LNB ON/OFF
27
SDA
26
SCL
A15
F. BLANK
4
IC4007
LNB CONTROLLER
10
5
7
VSEL
3
MI
LNBA
9
EN
ENT
OLF
3
1
LNB IN
LNB OUT
B17
LEFT
B14
A18
MODE
RIGHT
9
11
13
DL3 IN
S2-2
DR3 IN
8
DV3 IN
CVBS
LEFT
RIGHT
MODE
A17
CVBS
B15
A16
B16
RED
GREEN
BLUE
CN4601
P1.1
P1.2
P1.3
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
10
6
7
8
9
5
11
12
13
4
2
14
P1.4
P1.0
P2.7
3
IC4610
MICRO-CONTROLLER
IC4602
IC4016
4
O/P
2
I/P
10
P4.1
FPREQ
5
PI/PB
7
1
O/PA
O/PB
STBY
IC4604
2
PI/PA
12
CONT D
12
13
CONTA
CONTD
60
30
P7.7
25
P7.2
9
P4.0
64
RES
SIRCS
IC4011
WATCHDOG
MICRO_W
3
RGB
2
10
W.DOG
6
9
MENU
POWER ON
1
W.UP
5
FP_RESET
7
3
PI/PA
IC4603
RESET
RESET
3
2
OUT
5 VFP
CO
30
32
4
6
2
1
L3 IN
MODE
V3 IN
33
1
3
2
6
8
19
20
R OUT
L OUT
R IN
L IN
MODE
V IN
V OUT
J4001
V3 OUT
3
IR OUT
TO J4 BOARD
CN4701
CN4701
SDA-T
SCL-T
SDA-T
SCL-T
15
SCL
14
SDA
12
S/PDIF
CN4006
S/PDIF
A22
TO J5 BOARD
CN4301
CN4301
TO J3 BOARD
CN951
CN951
TO N BOARD
CN3501
CN3501
TO A BOARD
CN205
CN205
TO D BOARD
CN904
CN904
49
6
P0.0
SCK
7
5
1
52
50
P0.3
P0.1
SID
CS
TP OUT
48
~
44
.
39
~
32
P1.0
P2.7
51
P0.2
N
[ 2/2 DIGITAL PROCESSING ]
A2
[ DIGITAL INTERFACE ]
Click on the first or last page to see other KV-28DC20B service manuals if exist.