Panasonic TX-23LX50M / TX-23LX50A / TX-23LX50X Service Manual ▷ View online
11.3. Power Block Diagram
VCC
GND
OUT
TNRMSP_5.0V
AUDIO_9V
5.0V
SBY3.3V_D
SBY5.0V
8.0V
SW890
ESB92DA1B
INV_24V
AUDIO_9V
5.0V
24
VDDPAD12
12
V_OUT
IC1102
FOR
MAIN3.3V
139
4
41
129
23
SDRAM
11
VDD33RGB
VDDD4
5
VDD33FBL
VCC
5V
1.8V_A
TP104
75
1
VDD_CORE3
9
VDDPLL
1.8V
B7
3.3V_D
D851
LED_R
1.8ANA
1
66
1.8V
ST_ON
91
VDDP2
DVSUP
VDD_CORE2
2
25
5
62
STANDBTQ
5V
BM
24
IN
44
Q851
VDD_CORE1
1.8V
VDD_CORE4
68
VPP
IC2251
80
VDDAC1
75
PROT1
V_IN
A2
V_OUT
5
V_OUT
STB 5V
16
1
1
4
STBY_LED
118
IC854
STB 3.3V
VCC
VDDDACY
USE
IC853
AUDIO AMP
STB 2.5V
TMS
MCU
VCC
REMOTE RECEIVER
VDD3.3
STB2.5V_D
A7
VDDAC2
MULTI SOUND PROCESSOR
D857
92
62
28
IC1701
VDD3.3
TUNER
40
5V
IC1100
8
VDDARGB
16
(5.0V-3.3V)
VIDEO SIGNAL PROCESSOR
46
VDD3.3
FACTORY
SBY 2.5V
DVSUP
PROT2
39
VDD3.3
8
VDDP3
14
VDDDACY
A6
50
59
IC2501
VDD33C
64
RST
IC1106
5V
15
VDDPAD2
24
78
75
21
BTL
INV_ON
134
STB 5V
VDDD3
VDD33RGB
SBY 5.0V
12
IC852
1
VCC
11
35
V_IN
OUT
V-BOARD
72
13
VDDAFBL
KEY
MSP_8V
143
VDDPAD6
3
42
VDDAPLL
34
VDDPAD8
A4
VDDPAD10
48
IC851
AVSUP
40
78
1
4
33
MAIN 3.3V
VDDPAD5
22
VDDPAD3
VCC
86
26
12
VDDPAD4
12
11
LVDS_VCC
TU100
5.0V
RM201
TX-23LX50A/M/X
Power Block Diagram
Power Block Diagram
TX-23LX50A/M/X
Power Block Diagram
Power Block Diagram
5
AVSUP
VDDDI
96
LCD DRIVER
VDDPAD1
IC1700
3
VDDDACU
12
RC_IN
A-BOARD
32
13
STB2.5V_A
20
57
V1
VCC
KEY SCAN
56
13
VDDA2.5
22
STB3.3V_D
VDDPAD9
3.3DIG
VDDA2.5
15
VDD2.5
65
66
6
44
34
VDD2.5
PROM
73
IC1500
4
50
VDDARGB
Q1223
31
7
13
4
VDDAFBL
32
VCC
44
RESET
RS
VDDD2
LVDS TRANSMITTER
IC1103
2
AHVSUP
IC1104
1.8V_D
LEVEL CHANGE
3.3ANA
VDD
DVSUP
4
32
VDDP1
OUT
3
68
1.8DIG
IC1101
VDDPAD7
STB 3.3V
STB 3.3V
112
PLL_VCC
1.8V
3.3V_A
5V
123
8
REMOTE
104
TP2207
V_IN
POW ON
VDDPAD11
EEPROM
VDDPAD13
5
15
21
AP3
20
13
2
16
14
1
12
AP1
8
9
7
16
10
11
30V
24V
24V
24V
24V
24V
24V
2
IC801
AUDIO VCC 9V/1.2A
V IN
1
SW OUT
2
AP4
3
2
AP5
STBY5V
TO
4
2
3
1
5
24V
24V
24V
24V
24V
12
11
INV_ON
INV_SOS
INPUT_(_VIN_)
IC802
2
1
MAIN5V/2A
OUTPUT_(_V_OUT_)
13
14
15
16
12
21
22
23
SW OUT
IC803
1
1
MAIN1.8V/0.6A
V IN
4
20
1
KEY_SCAN
AP2
1
K3
1
AC IN
110-240V
3
K2
1
1
4
K1
K-BOARD
Q201
14
15
A3
AUDIO_VCC
13
1
2
AUDIO_VCC
16
21
AUDIO_VCC
20
30V
AUDIO_VCC
INV_SOS
INV_ON
INV_24V
POW_ON
LCD PANEL
INVERTER
TO
CN301
LED_R
DOWN
SW305
STR
FUNCTION
SW302
SW301
TV/AV
UP
SW304
SW303
POWER
SWITCH
50/60Hz
COLD
HOT
CN101
TO
A5
26
PANEL 5V
PANEL 5V
LCD PANEL
30
5V_DET
15
Q1102,Q1103
PANEL_5V_ON
44
Q1706
Q1700
Q1105
TX-23LX50M / TX-23LX50A / TX-23LX50X
25
11.4. Signal Block Diagram
VCC
GND
OUT
Y_DET
S_DET
Y_DET
SPR
SPL
AV2L
AV1R
AV1L
AV2L
AV1L
AV1R
LOUT
AV2R
AV2R
ROUT
ROUT
LOUT
LOUT
SW1
SW2
SW1
SW2
S_DET
ROUT
INV_24V
STB3.3V_D
8.0V
AUDIO_9V
5.0V
PANEL_5V
5.0V
1
2
3
4
5
6
7
Y
56
55
C
V
57
AV1
XIN
XOUT
70
69
40
AV2
39
41 PB
V
PR
53
Y
52 TV_V
RST
21
14
CVBS
42
S_DET
50
OE/RST
Y_DET
24
43
KEYSCAN
33
44
RC_IN
STBY_LED
30
HS
VS
29
57
OSD B
58
OSD G
OSD R
59
62
ST_ON
DACML 28
DACMR 27
OUTL
OUTR
37
36
56
SC1_IN_R
SC1_IN_L
57
50
SC3_IN_L
A5
31
32
656I00
61
CVBSO3
CVBSO1
63
23
V OUT
IC1500
VIDEO SIGNAL PROCESSOR
11
SDA
VIDEO OUT
10
12
AFT
17
SCL
TU100
TUNER
TUNER
MULTI SOUND PROCESSOR
IC2501
IC1100
MCU
LCD PANEL
H_IN
9
12
YIN.7
8
19
YIN.0
V_IN
93
R1.7
82
R1.0
103
94
G1.0
G1.7
115
B1.7
B1.0
106
SCL
SDA
4
7
122
125
132
GIN1
RIN1
131
133
BIN1
38
AI_OFF
LCD DRIVER
IC1700
SDA2(3.3V)
SCL2(3.3V)
12
A2
11
13
LED_R
STB 3.3V
REMOTE
SP_L-
2
6
4
5
3
7
STB 3.3V
SP_R+
SP_L+
HP_L
HP_R
SP_R-
1
A4
4
POW_ON
KEY_SCAN
21
INV_ON
A3
OSD B
OSD G
OSD R
STBY_LED
STBY_LED
25
AFC
120
121
PMP2
PMP1
Q1714,Q1718
22
23
INV_ADIM
INV_PWM
PCS1
PCS2
14
SIF OUT
17
H OUT
Q1513,Q1503,Q1501
SDA
6
SCL
13
RESET
24
656I07
10
15
16
21
22
30
V
L
R
R
L
V
PR
PB
Y
R
L
V
AV2
21
A2
2
A1
5
4
19
IC1106
A3
20
23
LEVEL CHANGE
22
A4
OE
3
10 A9
14
B1
B4
B3
B2
B9
SCL1(EEP5V)
SDA2(5.0V)
SDA1(EEP5V)
SCL2(5.0V)
RESET
IC1104
4
2
Q1500,Q1502
Q1101
51
67
21
3
4
10
6
IN1
IN2
OUT1+
2
OUT2+
12
OUT1-
OUT2-
AUDIO AMP
IC2251
8
SCL2(3.3V)
SDA2(3.3V)
11
34
SDA2(3.3V)
SCL2(3.3V)
12
9
SCL1(EEP)
SDA1(EEP)
10
46
13
BUSREQ
INV_ON
45
SMUTE
16
WP
6
16
B5
B7
18
IC1106
LEVEL CHANGE
8
A5
A7
(1/2)
(2/2)
(5.0V-3.3V)
Q1105
Q1223
SDA2(3.3V)
SCL2(3.3V)
SDA1(EEP)
SCL1(EEP)
A-BOARD
SC3_IN_R
ANA_IN+
RESETQ
SCL2(5.0V)
SDA2(5.0V)
IC1102
SDRAM
IC1103
80
PCK1
X1500
JK001
AV1S
AV1
MONITOR
OUT
RST3.3
C
Y
R_SW
(5.0V-3.3V)
COMPONENT
AV2
Q2257
Q2256
Q2255
9
VOL
Q2003
Q2001
Q2502
Q2501
MUTE
78
77
D_CTR_I/O_1
D_CTR_I/O_0
SCL2(5.0V)
SDA2(5.0V)
Q1515
AFC
Q101
TV-V
RESET
2
V_OUT
H_OUT
22
23
HS_OSD
VS_OSD
2
I2C_DA
I2C_CL
X2501
71
72
X_IN
X_OUT
2
4
6
8
10
20
16
18
14
12
30
26
29
27
28
TD-
TA-
42
37
46
41
38
45
40
TC+
47
TA+
TC-
TB+
TB-
48
TCLK+
TD+
39
DAC OUT
2
IC1101
5
6
WC
EEPROM
7
SCL1(EEP)
SCL
SDA1(EEP)
SDA
Q1012
Q1716
Q1715
Q1703
Q1707
Q1711,Q1710
Q1701
Q1705
Q1717
INV_SOS
20
41
PROT2
X1100
52
53
PROT1
31
Q851
D857
D851
56
50
3
2
14
4
24
15
32 /PDMN
PCS3
126
30
27
28
31
LCD_DEN
LCD_HS
LCD_VS
LCD_CLK
LVDS
IC1701
TRANSMITTER
TCLK+
TA0
TA6
TB6
TB0
TC0
TC6
TD6
TD0
TX3-
TX0-
TX2-
TX1-
TCLK-
TX2+
TX3+
TX0+
TCLK+
TX1+
D0-D7
A0-A19
D0-D7
A0-A19
A0-A18
D0-D7
PROM
16
5.0V
XTAL2
XTAL1
SW1
SW2
5
6
TX0-
TX3-
TX1-
TCLK-
TX2+
TX3+
TX2-
TX0+
TCLK+
TX1+
PANEL_5V
PANEL_5V
PANEL_5V
PANEL_5V
PANEL_5V
LVDS_OPTION
21
32
LVDS_ON
26
BATS
15
BATS
V1
15
2
6
4
5
3
7
16
12
11
13
V2
3
4
2
1
JK201
SN201
RM201
Q201
LED_R
REMOTE RECEIVER
V-BOARD
R
SPEAKER
R-
R+
1
AP4
4
20
21
AP3
22
23
INV_ON
INV_SOS
INV_PWM
INV_ADIM
12
14
AP5
13
11
SDA2(5.0V)
SDA2
4
FACTORY
5
SCL2(5.0V)
STB 5.0V
SCL1
6
SDA1
SDA1(EEP5V)
BUSREQ
USE
2
FOR
A6
STB5.0V
SCL1(EEP5V)
1
SCL2
7
L
SPEAKER
L+
L-
AP-BOARD
FUNCTION
DOWN
TV/AV
STR
UP
1
KEY_SCAN
AP2
1
K3
SW301
SW302
SW303
SW304
SW305
K-BOARD
TO
AP1
20
POW_ON
CN301
P3.3
TX-23LX50A/M/X
Signal Block Diagram
Signal Block Diagram
TX-23LX50A/M/X
Signal Block Diagram
Signal Block Diagram
TX-23LX50M / TX-23LX50A / TX-23LX50X
26
11.5. A-Board (1 of 3) Schematic Diagram
++
+
+
+
R
V
L
Y
V
R
V
PR
L
PB
R
Y
C
L
+
+
+
+
+
+
+
AC_AV2_V
AC_AV2_PB
AD_656.4
AB_SCL2(3.3V)
A
C
_A
V1_C
AB_SDA2(3.3V)
AB_HS_VSP
AD_656.0
A
C_A
V1_Y
AD_656_CLK
AD_656.1
AD_656.2
AB_VS_VSP
AD_656.3
AD_656.5
AD_656.7
AD_CLKF
A
C_TV_V
AD_656.6
A
C
_A
V2_V
A
C
_A
V1_V
A
C_A
V2_Y
AB_RST3.3
AB_HS_DPS_OUT
AB_VS_DPS_OUT
AL_DPS_3.3ANA
AC_AV1_V
AC_AV2_PR
AD_CLK20
A
C_A
V2_PB
AB_TXT_CVBS
AG_AV2_L
AG_AV2_R
A
C_A
V2_PR
AG_SW2
AG_SW1
AB_SCL2(5.0V)
AB_AFC
AG_AV1_R
AG_AV1_L
AC_AV1_Y
AC_AV1_C
AC_AV2_Y
AB_SDET
AC_VOUT
AG_LOUT
AG_ROUT
AB_YDET
AB_HS_DPS_IN
AB_VS_DPS_IN
AB_VS_OSD
AB_HS_OSD
AL_DPS_1.8ANA
AB_SDA2(5.0V)
AC_TV_V
AB_VS_VSP
AB_HS_VSP
AB_PWM
AB_INV_ADIM
AD_AI_OFF
AD_DAC_OUT
AL_DPS_3.3DIG
AL_DPS_1.8DIG
AD_DAC_OUT
AC_VOUT
Q1502
2SA207700L
3.3V
C1511
4V
100u
R1506
0
C1500
6.3V
1u
5.0V
C1518
4V
100u
X1500
H0J202500011
AR202505A
R1529
68
C1790
16V
0.1u
Q1718
UNR221100L
R1226
75
C1214
16V
0.1u
R1735
1k
R1738
330
D1221
MAZ81400ML
R1235
75
C1240
0.33u
16V
C1513
4V
100u
3.3V_A
R1245
100
C1559
50V
100p
C1231
560p
50V
1.8V_D
C1223
560p
50V
R1229
75
R1248
100
TP2213
3.3V_D
R1753
0
C1538
6.3V
1u
1.8V_D
R1554
0
R107
1k
R1215
180k
R1778
0
Q1711
2SA207700L
C1766
50V
100p
R1772
330
1.8V_D
R1247
100
C1501
6.3V
1u
C1512
4V
100u
C101
1u
16V
R1729
5.36k
5.36k
R1737
1k
L1501
G1C6R8MA0061
C1242
560p
50V
3.3V_D
R1502
82
C1215
16V
0.1u
R1518
82
C1720
4V
47u
R1741
0
C1221
16V
0.1u
C1548
47u
6.3V
Q1714
UNR221100L
R1513
220
IC1500
C1AB00002128
1
VDDD
A
C
Y
2
AY
O
U
T
3
VSSD
A
C
Y
4
VSSD2
5
VDDD2
6
SDA
7
TMS
8
656VIN/BLANK
9
656CLK
10
656IO7
11
VSSP2
12
VDDP2
13
SCL
14
V
15
656IO6
16
656IO5
17
HOUT
18
H50
19
ADR/TDI
20
V50
21
656IO4
22
656IO3
23
VOUT
24
RESET
25
VDDP3
26
VSSP3
27
CLK
OUT
28
VDDD3
29
VSSD3
30
656IO2
31
656IO1
32
656IO0
33
VSSD4
34
VDDD4
35
VDD
AFBL
36
VSSAFBL
37
FBL1
38
FBL2
39
RIN1
40
GIN1
41
BIN1
42
VDD
ARGB
43
VSSARGB
44
VDD33RGB
45
VSS33RGB
46
RIN2
47
GIN2
48
BIN2
49
VSSD5
50
VDDAC1
51
VSSAC1
52
CVBS1
53
CVBS2
54
CVBS3
55
CVBS4
56
CVBS5
57
CVBS6
58
CVBS7
59
VDD33C
60
VSS33C
61
CVBSO3
62
CVBSO2
63
CVBSO1
64
VDD
A
C
2
65
VSSA
C2
66
VDDD1
67
VSSD1
68
VDD
APLL
69
XOUT
70
XIN
71
TCLK
72
VDDP1
73
VSSP1
74
656HIN/CLKF20
75
VDDD
A
C
V
76
A
V
OUT
77
VSSD
A
C
V
78
VDDDACU
79
AUOUT
80
VSSDACU
R1747
330
C1509
50V
0.01u
Q1705
2SA207700L
L1702
G1C100K00020
JK001
K1U926A00003
V
L
R
G
Y-SW
Y
PB
PR
G
V
L
R-SW
R
G
C
Y
G
Y-G
C-G
G
V
L
R-SW
R
G
C1527
100u
6.3V
Q1515
2SA207700L
R1755
1k
C1535
6.3V
1u
C104
16V
0.1u
1.8V_D
C1224
0.1u
16V
C1225
16V
0.1u
R1777
1k
R1726
0
R1553
4.7k
Q1707
UNR221100L
R1521
82
C1239
0.33u
16V
3.3V_D
R1510
100
R1774
330
C1551
50V
0.01u
R1501
82
C1503
6.3V
1u
C1520
16V
0.1u
1.8V_A
C1507
50V
12p
Q1501
2SC584500L
R1728
2.61k
R1511
1.5k
R1723
0
3.3V_A
R1246
100
TU100
ENG39A02GF
NC
1
NC
2
BM
3
NC
4
SW1
5
SW2
6
BT
7
RF_AGC
8
NC
9
SCL
10
SDA
11
AFT
12
AUDIO_OUT
13
SIF_OUT
14
BTL
15
IF_OUT
16
VIDEO_OUT
17
R1515
220
C1709
50V
0.1u
R1740
0
R1221
75
C1555
16V
0.1u
C105
0.1u
16V
C1529
6.3V
1u
C1536
6.3V
1u
R1779
10k
C1523
4V
100u
C1558
50V
100p
R1732
0
C1701
4V
47u
R1722
0
R1504
0
R1516
82
L101
ELJPA220KF
R1241
75
R1242
180k
1.8V
TP865
C1547
16V
0.1u
Q1716
2SA207700L
R1555
0
C1237
0.33u
16V
L1703
G1C100K00020
R1520
82
C1789
16V
0.1u
R1227
75
C1504
16V
0.1u
Q1500
2SC584500L
C1216
16V
0.1u
R1551
470
5.0V
C1531
6.3V
1u
5.0V
L1701
G1C100K00020
R1746
0
C1506
6.3V
1u
3.3V
R1500
330
C1533
6.3V
1u
C1556
50V
100p
L100
EXCELDR35V
1.8V
C1526
330p
50V
TP2207
R1514
220
C1708
6.3V
1u
R1216
180k
L1500
G1C100K00020
C1765
50V
100p
R1517
82
C1222
16V
0.1u
1.8V_A
R1552
75
C1550
50V
0.01u
R1240
75
R1733
5.6k
30V
L1503
G1C100K00020
R1512
1.5k
Q1703
UNR221100L
R1230
180k
C1554
50V
0.01u
C1710
16V
47u
47u
C1510
6.3V
1u
Q1717
2SA207700L
Q1503
2SA207700L
C1534
6.3V
1u
R3209
0
C1778
50V
1000p
C1553
50V
0.01u
R1730
1k
C1241
560p
50V
3.3V_A
C1502
16V
0.1u
C1528
6.3V
1u
D1223
MAZ81400ML
C1227
16V
1u
R1524
0
R1782
10k
C1230
560p
50V
C1714
4V
47u
L3104
G0C101K00023
L1502
G1C6R8MA0061
Q1715
2SC584500L
PANEL_5V
R1507
82
C1530
6.3V
1u
C1532
6.3V
1u
R1734
0
3.3V
C1508
50V
15p
Q1701
2SC584500L
Q101
2SA207700L
C102
0.1u
50V
C1238
0.33u
16V
R1743
0
R851
0
R1715
10k
R1522
82
R1547
22k
C1519
6.3V
1u
Q1710
2SA207700L
C1505
6.3V
1u
C1537
6.3V
1u
8.0V
R1505
0
C1552
50V
0.01u
R1503
82
50V
100p
C1557
R1739
0
R1718
1k
TP104
D1543
MA2J11100L
R105
220
3.3V
C1229
560p
50V
C3107
6.3V
100u
TNRMSP_5.0V
L1700
G1C100K00020
L103
J0JCC0000241
L104
J0JCC0000241
L1504
J0JCC0000241
L1505
J0JCC0000241
C1793
16V
0.1u
C1785
16V
0.1u
1.8V
R852
0
3.3V_D
C1549
10V
470u
R1702
3k
R1736
5.6k
R1703
2k
R1716
3k
R1719
2k
R1760
3k
R1731
1.2k
Q1513
2SD10300TL
R1548
15k
R1550
100
100
MONITOR OUT
AV1S
AV1
AV2
AV2-COMPONENT
B
E
9
6
8
7
3
D
4
C
1
2
F
5
A
4
6
7
1
5
3
2
A-BOARD TNPH0629 (1/3)
VIDEO SIGNAL
PROCESSOR
0
1.4
0.5
0
2.9
0
3.3
0.1
1.8
3.3
2.4
0.2
0.2
1.4
0
1.4
0
3.3
0
0
3.3
1.0
0
0.5
0.1
0.6
1.8
0
3.3
1.8
0.8
0
0.7
0
0
0.5
0
0.8
3.3
1.8
0
0
0.4
0.9
1.8
1.0
0.9
3.3
1.8
0
0.7
0
3.3
0
0
1.0
0
0
1.5
1.4
1.4
3.2
1.4
0.7
0.7
0
1.8
3.3
1.8
1.4
0
1.4
0
1.8
0
0
0
0
0
0
1.9
2.6
0
1.8
4.3
1.2
4.3
1.8
5.0
1.8
4.3
1.2
2.3
4.4
5.0
1.4
2.1
5.0
2.4
3.0
0
5.0
1.4
2.0
0
0
1.6
0
0.6
1.2
3.0
0
0
2.1
1.5
2.1
2.0
3.6
3.0
0
0
3.1
1.6
3.1
1.0
1.0
1.6
0
5.3
6.0
0
4.9
0
0
TUNER
TX-23LX50A/M/X
A-Board (1 of 3) Schematic Diagram
A-Board (1 of 3) Schematic Diagram
TX-23LX50A/M/X
A-Board (1 of 3) Schematic Diagram
A-Board (1 of 3) Schematic Diagram
TX-23LX50M / TX-23LX50A / TX-23LX50X
27
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