Read Panasonic TX-20LA5F / TX-20LA5P (serv.man3) Service Manual online
CONTROL BLOCK DIAGRAM
TUNER
11
10
SDA2 5,0
A12
6
33V
5
5V
B1
6
B - BOARD
5
SCL2 5,0
SDA2 5,0
SCL2 5,0
7
7
12
AFC
AFC
A3
2
RM1050
REMOTE
CONTROL
ROUT
BATS
V - BOARD
SN1063
V1
2
Q1062
Q1061
4
4
RC
BATS
RC
A13
19
IC802
B3PAA0000267
KEYSCAN
P - BOARD
P4
1
ST_ON
18
2
LOCAL KEYS
SWITCHING
MATRIX
Q851
POWER SUPPLY
KEYSCAN
ST_ON
LCD PANEL
A4
12
13
INV_ON
LCD_AI
Q1706
RST 3,3
SCL2 3,3
SDA2 3,3
HS
VS
656_CLK
CLKF
AI_OFF
DACY_OUT
INV_PSU_ON
LCD_CLK
LCD_HS
LCD_VS
LCD_DEN
Q1700
LCD PANEL 5V
DACU_OUT
DACV_OUT
AI_OFF
BATS
LCD_AI
INV_ON
CLK20
IC1700
DPS9450A
4
SCL2 3,3
2
RST 3,3
7
SDA 3,3
8
HS
9
VS
AD_656.0
÷
AD_656.7
656_CLK
26
CLKF
27
AI_OFF
38
PANEL_ON
39
42
INV_PSU_ON
INV_ON
46
CLK20
73
80
LCD_CLK
122
LCD_HS
125
LCD_VS
126
LCD_DEN
OSD_FB
141
AI
REGULATION
IC1500
VSP9405
8
HS_OSD
6
SDA2 3,3
9
656_CLK
13
SCL2 3,3
AD_656.0
÷
AD_656.7
24
RST3,3
23
VS
27
CLKF
69
XOUT
70
XIN
74
CLK20
17
HS
2
DACY_OUT
79
DACU_OUT
76
DACV_OUT
656_CLK
CLKF
CLK20
DACY_OUT
DACU_OUT
DACV_OUT
X1500
SDA2 3,3
HS_OSD
SCL2 3,3
HS
VS
RST3,3
IC1100
SDA5550M
10
SDA1 3,3V
D0
÷
D7
A0
÷
A18
9
SCL1 3,3V
11
SCL2 3,3V
12
SDA2 3,3V
13
BUSREQ
14
RST
15
RESET
24
KEYSCAN
25
AFC
27
SLOW1
31
PROT1
33
RC_IN
AV_LINK_IN
34
SERVICE
37
STBY_LED
44
XTAL2
52
XTAL1
53
WR_OUT
64
RD_OUT
65
PSEN_OUT
88
Q1108
Q1109
Q1101
Q1100
RST 5,0
RST 3,3
LEVEL
SHIFTER
Q1103
Q1104
LEVEL
SHIFTER
SCL1 5,0
SDA1 5,0
SCL2 5,0
SDA2 5,0
SDA2 3,3
SCL2 3,3
IC1101
EAROM
6
SCL1 3,3V
5
SDA1 3,3V
Q1107
Q1106
BUSREQ
IC1105
RESET IC
VOUT
1
KEYSCAN
AFC
SLOW1
RC_IN
PROT1
ST_ON
62
IC1102
SDRAM
RD_OUT
24
D0
÷
D7
A0
÷
A18
IC1103
EPROM
PSEN_OUT
24
D0
÷
D7
A0
÷
A18
WR_OUT
29
AV_LINK_IN
SERVICE
X1100
STBY_LED
SCL2 5,0
SDA2 5,0
RST 5,0
X2000
TRP_ON
IC2000
MSP3410
2
SCL2 5,0
3
SDA2 5,0
21
RST 5,0
71
XTAL_IN
72
XTAL_OUT
78
TRP_ON
Q869
Q870
Q871
D866
D867
D868
PROT 1
SBY3,3
5,0V
8,0V
Q1207
Q1208
SERVICE
SDA2 5,0
AV_LINK_IN
A6
2
SERVICE
4
5
8
9
SCL
1 5,0
SDA1 5,0
BUSR
E
Q
SCL
2 5,0
SDA2 5,0
AV1 21 PIN SCART
8
SL
O
O
W1
16
FBL1
50
RST
IC1104
RESET IC
VOUT
1
OSD_FB
60
ST_ON
9
9
14
TRP_ON
X200
X201
Q200
HS_OSD
29
HS_OSD
VS
30
VS
Q1105
TRP_ON
A - BOARD
Q860
Q864
POWER SUPPLY
ST_ON
37
FBL1
FBL1
LCD_CLK
LCD_HS
LCD_VS
LCD_DEN
IC1701
LVDS
DRIVER
31
LCD_CLK
27
LCD_HS
28
LCD_VS
30
LCD_DEN
14
BACKLIGHT_PWM
Q1713
BACKLIGHT_PWM
BACKLIGHT_PWM
120
LVDS_ON
32
LVDS_ON
LVDS_ON
LVDS_ON
43
A2
Z1
Q254
D2350
STBY_LED
1
1
STBY_LED
Z - BOARD
Q865
INV POWER
SUPPLY
INV_PSU_ON
10
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