Panasonic TX-28PK20P Service Manual ▷ View online
AUDIO BLOCK DIAGRAM
9
TUNER
Q101
Q102
E - BOARD
Q2303
Q2301
AUDIO
MONITOR
OUT
AV2
1 R OUT
3 L OUT
2 R IN
6 L IN
E16A
1
M1
1
2
2
AV3
R
6 R
4 L
HEADPHONE
7 R
5 L
M4
1
M5
3
E17
10
M2
10
8
8
M - BOARD
IC251
Q2102
Q2103
5 R
R 7
Q252
Q251
2 L
L 11
AUDIO
OUTPUT
L
Z4
1
2
E10
1
2
5
6
5
6
IC2301
AUDIO
AUDIO
AMP
5
7
3
1
Z2
1
Z5
2
R Mic In
L Mic In
IC2221
AUDIO
AUDIO
AMP
IC2201
AUDIO
AUDIO
AMP
10
10
8
8
1
5
7
9
1
5
7
9
2
2
Z - BOARD
Q2302
Q2304
IC2101
DACM_R 24
SC3_IN_L 37
47 ANA_IN1+
DACM_L 25
SC3_IN_R 38
AV1
1 R OUT
3 L OUT
2 R IN
6 L IN
SC2_OUT_R 27
SC2_OUT_L 28
SC2_IN_R 40
SC2_IN_L 39
AUDIO
PROCESSOR
22 DACA_L
SC1_OUT_R 30
SC1_OUT_L 31
SC1_IN_R 42
SC1_IN_L 41
21 DACA_R
CONTROL BLOCK DIAGRAM
10
F1
13
21
22
E70
13
21
22
E18
7
4
6
5
3
E8
6
SCL 1
SDA 1
SENSE
CONVERTER
68
54
17
20
29
62
IC1504
IC1503
67
21
DEFLECTION
PROCESSOR
PROCESSOR
IC1501
VIDEO
PROCESSOR
IC1502
C.I.P.
26
53
19
18
55
56
54
32
31
To Y2
F - BOARD
AV2
8
10
AV LINK
SLOW 2
AV1
8
10
12
SLOW 1
SCL 1
SDA 1
RC
SDA 1
SDA 2
SERVICE /
TEST
TEST
IC1101
TUNER
50
SCL 2
SDA 2
SDA 1
SCL 1
Q451
71
60
Q854
52
Q853
74
Q1052
81
Q856
75
Q851
Q1106
Q1105
Q1107
Q1104
51
72
73
59
58
Q3006
Q3007
55
VPROT
KEYSCA
N
ON/OFF
RC
LED
PROT 1
SLOW 2
OUT
IN
S
L
OW
1
SERVI
C
E
SCL
SDA
48
49
SCL
SDA
E - BOARD
IC2101
4
8
7
AUDIO
PROCESSOR
MICRO
PROCESSOR
IC1103
6
5
EAROM
Q1051
AFC
51
AF
C
IC601
5
VIDEO
PROCESSOR
IC601
5
AV VIDEO
SWITCH
Q601
E16A
8
7
M1
8
7
D1061
M - BOARD
D_CTR_OUT0
SCL 1
SCL 2
IC1061
REMOTE
CONTROL
RECEIVER
Q1062
LOCAL
KEYS
SWITCH
MATRIX
M2
6
E17
6
L/L’ POS/NEG
83
82
PO
S/
NEG
L/
L’
POWER SUPPLY BLOCK DIAGRAM
11
15V
M11
4
1
F - BOARD
D868
IC801
T801
IC251
D850
TUNER
Q850
IC851
IC853
D454
Q853
IC1101
IC1102
IC1103
IC2101
T802
RL801
5V SBY
5V SBY
5V
5V
8V
2
43
66
1
31
32
8
33
46
3
4
3
1
3
1
S4
B2
P2
P1
S5
S2
S7
10
T551
9
8
5
6
2
12V
200V
150V
-14V
14V
27V
150V
29V
7V
5V
D867
Q852
Q854
Q855
1
D805
R805
R814
IC850
1
2
D862
R854
33V
16
IC1104
2
RESET
MICRO
PROCESSOR
AUDIO
PROCESSOR
EPROM
EAROM
IC1105
2
RESET
REG
REG
REG
IC1501
31
C.I.P.
IC701
6
EW
CORRECTION
POWER
SUPPLY
IC451
7
9
2
V-OUTPUT
AUDIO
OUTPUT
~
+
~
D801
E - BOARD
Y - BOARD
E3
2
Y3
2
E1
4
1
E2
2
1
R802
Line
Filter
IC351
6
R OUT
12V
Degauss Coil
M10
4
1
Line
Filter
Mains
In
M - BOARD
E70
11
18
19
20
F1
11
18
19
20
IC1502
53
IC1503
VIDEO
PROCESSOR
IC1504
1
Deflection
Processor
Processor
CONVERTER
HOUT5V
3.3V
66
36
19
57
9, 25, 35
56, 57, 59
10
28
51
41, 51, 53
Q1502 /3 /5 /6 /8
/9 /11 /12
E8
1
Y2
1
D554
1
1
IC361
G OUT
IC371
B OUT
6
6
2
2
2
IC856
3
1
REG
IC855
1
3
REG
F801
1
5
1
54
D458
Q908
Q1504 /7 /10 /13
Q1501
4
IC601
VIDEO
SW
7
IC1061
REMOTE
CONTROL
RECEIVER
M1
9
E16A
9
E10
8
Z4
8
IC2302
AMP
IC2221
AMP
IC2201
AMP
8
4
4
Z - BOARD
PARTS LOCATION
12
NOTE:
The numbers on the exploded view below
refer to the mechanical section of the
Replacement Parts List.
The numbers on the exploded view below
refer to the mechanical section of the
Replacement Parts List.
24
3
19
12
6
25
26
11
5
4
22
21
10
9
2
15
14
17
8
20
27
18
28
13
23
1
7
16
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