Panasonic TX-20LA5F / TX-20LA5P (serv.man3) Service Manual ▷ View online
POWER SUPPLY BLOCK DIAGRAM
1
4
SW800
P1
MAINS IN
+
~
D801
~
F800
Line
Filter
LF802
Line
Filter
LF803
P - BOARD
-
IC801
POWER
SUPPLY
23
20
19
16
15
11
10
7
T801
13
14
7
8
6
1
3
4
IC803
IC802
IC850
REG
K
Q851
P4
17
÷19
Q805
D806
Q803
D805
A
A13
1
÷3
A3
3
RM1050
REMOTE
VCC
SBY3,3V
V - BOARD
SN1063
V1
3
TUNER
15
3
33V
A12
10
33V
4
5V
B1
10
B - BOARD
4
5V
IC2000
MSP3410
11,12,13,65,66
5,0V
8,0V
39
IC1100
SDA5550M
6,73
SBY2,5V_D
SBY3,3V_D
8,40,75,92
SBY2,5V_A
22,56
IC1102
SDRAM
32
IC1103
EPROM
32,1
SBY3,3V_D
SBY3,3V_D
IC1101
EAROM
8
SBY3,3V_D
IC250
TDA1517
7
12V
IC1104
RESET IC
2
SBY3,3V_D
IC1105
RESET IC
2
24V
IC1500
VSP9405
5,28,34,66
1,8V_D
3,3V_D
7,12,25,72
35,42,50,64
1,8V_A
3,3V_A
1,44,59,75,78
A6
1
SERV
ICE
5,0V
A50
2
Q1700
5,0V
A4
1
÷5
24V_INV
LCD PANEL
A - BOARD
IC1700
DPS9450A
5,20,32,40,48,57,68,78,86,96,104,112,123
24,62,91,118
129,139
DPS_3,3DIG
DPS_1,8DIG
DPS_3,3ANA
75,134,143
DPS_1,8ANA
33V
5V
SBY3,3V
24V
68
1,8V_VSP
D851
D852
D853
15
÷16
4
÷5
IC866
REG
1
4
IC860
REG
3
5
4
Q868
D862
D863
Q867
33V
12V
Q866
24V_INV
F861
3,3V_SBY
IC862
REG
1
2
24V
IC883
REG
1
6
5V
D854
IC871
REG
4
5
8V
5V
24V
LC filter
3,3V_D_SBY
2,5V_SBY
2,5V_A_SBY
2,5V_D_SBY
LC filter
LC filter
3,3V
Q890
1,8V
Q880
3,3V_A
3,3V_D
LC filter
LC filter
1,8V_A
1,8V_D
LC filter
LC filter
IC1701
LVDS DRIVER
1,9,26,34,44
3,3V_LVDS
3,3V
LC filter
3,3V_LVDS
4
9
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
PARTS LOCATION
11
NOTE:
The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List.
2
22
28
19
3
4
10
9
8
21
16
12
31
23
1
29
11
5
26
13
15
30
17
18
25
6
7
14
24
20
27
Components Identified by mark have special characteristics important for safety.
* When replacing any of these components, use only manufacturers specified parts.
In case of ordering these spare parts, please always add the complete Model-Type
number to your order.
* When replacing any of these components, use only manufacturers specified parts.
In case of ordering these spare parts, please always add the complete Model-Type
number to your order.
REPLACEMENT PARTS LIST
Important Safety Notice
Description
Cct Ref
Parts Number
Description
Cct Ref
Parts Number
COMMON PARTS
EXPLODED VIEW
SPEAKER
1
EAS9D25A
TUNER
2
ENG37A04GF
REMOTE CONTROL
3
EUR7651010
LCD PANEL
4
L5EDD5L00006
PANASONIC BADGE
5
TBMA148
5-KEY BUTTON
6
TBX0E80900
POWER BUTTON
7
TBXA42902
LOCK HINGE (R)
8
TEJA081
LOCK HINGE (L)
9
TEJA082
PLASTIC WASHER
10
TEJF016
LED PANEL
11
TKKC5205-1
CONNECTOR COVER
12
TKKL5290
IR/AI WINDOW
13
TKP0E13901
BUTTON COVER
14
TKPA85003
BACK COVER
15
TKUC15902
SWIVEL PLATE
16
TKXA13201
PEDESTAL COVER
17
TKXA16901A
CABINET
18
TKYA26102
LEFT FIXING METAL
19
TKZC5023
RIGHT FIXING METAL
20
TKZC5024
PEDESTAL METAL
21
TKZG5039-2
FIXING METAL
22
TKZX5180
CHASSIS FRAME
23
TMX0E406-1
B P.C.B.
24
TNP8EBL30AA
P P.C.B.
25
TNP8EPL30AA
V P.C.B.
26
TNP8EVL30AA
Z P.C.B.
27
TNP8EZL30AA
AC CORD ASSY
28
TXASX01EFHG
SCREW
29
XTB4+10FFJ
MISCELLANEOUS COMPONENTS
BATTERY
.
R6RC/2P
PRESET LABEL -TUNER
.
TBMU387
PRESET LABEL -TERMINAL
.
TBMU388
GASKET
.
TEWA339
VESA METAL
.
TKZX5181-1
SET FOOT
.
TMKK039-1
AC CORD BRACKET
.
TMW0E904
CARTON
.
TPC0E63601
BOTTOM CUSHION
.
TPD0E0046
TOP CUSHION
.
TPD0E0047
SCREW
.
XTN3+10J
SCREW
.
XTV3+12JFJ
SCREW
.
XYN4+J10FJ
I.C.s
AUDIO AMPLIFIER
IC250
TDA1517/N3
RESET IC
IC251
C0EBF0000086
MAIN PS CONTROL
IC801
F9222L-F219
PHOTO COUPLER
IC802
B3PAA0000363
PHOTO COUPLER
IC803
B3PAA0000363
VOLTAGE REF IC
IC850
TL431AILPM
STEP-UP DC CONVERTER
IC860
C0DBAMA00015
2.5V REGULATOR
IC862
TA48L025FLF
3.3V SBY REGULATOR
IC866
C0DAAGH00003
8V REGULATOR
IC871
C0DBEZC00010
1.8V REGULATOR
IC881
XC6365D105MR
5V REGULATOR
IC883
C0DAAJG00007
MICRO PROCESSOR
IC1100
SDA5550MQBTL
SRAM
IC1102
K6X4008T1FU7
4M EPROM M27W40180B6E
IC1103
26E0/020/0E
RESET IC
IC1104
C0EBF0000086
RESET IC
IC1105
C0EBF0000086
VIDEO PROCESSOR
IC1500
VSP9405BVKC4
LCD DRIVER
IC1700
DPS9450AXZA1
LCD PANEL INTERFACE
IC1701
C0JBCZ000512
AUDIO PROCESSOR
IC2000
C1AB00002133
LED RECEIVER
RM1050
PNA4701M05TV
FUSES
FUSE
F800
K5D502BNA005
FS LINK
F861
TSF19252
DIODES
DIODE
D801
B0EBNT000007
DIODE
D802
UDZSTE-1722B
DIODE
D803
UDZSTE-1710B
ZENER DIODE
D804
UDZSTE-1720B
DIODE
D805
1N4004-T
DIODE
D806
1N4004-T
DIODE
D807
ERB93-02E
ZENER DIODE
D808
UDZSTE-1720B
DIODE
D809
MA8270MTX
DIODE
D810
MA8270MTX
DIODE
D811
CMS16TE12LQ
DIODE
D812
CMS16TE12LQ
DIODE
D813
MTZJT-775.6B
DIODE
D851
YG868C10R
DIODE
D852
YG868C10R
DIODE
D853
YG868C06R
DIODE
D854
1SS355TE-17
DIODE
D855
1SS355TE-17
DIODE
D861
1SS355TE-17
DIODE
D862
1SS355TE-17
DIODE
D863
1SS355TE-17
DIODE
D865
CMS16TE12LQ
DIODE
D866
UDZSTE178.2B
12
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