Panasonic TC-19LX50 / TC-23LX50 / TC-19LE50 / TC-23LE50 Service Manual ▷ View online
7 Measurements and Adjustments
7.1. Video Signal Level Adjustment (RF)
Instrument Name
Connect to
Remarks
1.
Remote controller
2.
RF signal
3.
SG
RF in
1. Receive studio color bar by RF signal input.
(Viewing mode: standard, LCD AI: OFF, Back Light: +30 )
2. In service mode choose adjust item then press remote button 1 into main mode then press remote 3 into Y Gain and press
remote button “8” to do auto adjustment.
3. Press remote button “2” go back main menu.
13
TC-19LX50 / TC-23LX50 / TC-19LE50 / TC-23LE50
14
TC-19LX50 / TC-23LX50 / TC-19LE50 / TC-23LE50
8 Block Diagram
8.1. Block Diagram (1 of 3)
+
+
+
+
PUSH
+
+
+
INV_SOS
INV_ADIM
INV_ON
INV_PWM
KEY
MAIN_SW_DET
INV_ADIM
INV_PWM
INV_SOS
INV_ON
KEY
MAIN_SW_DET
D24
R14
1K
1K
D890
Q862
Q864
Q854
D877
C23
220u
R3817
Q859
D21
R3815
D879
RC2
D869
Q868
D10
D886
CN1
C18
100u
100u
D12
R931
Q865
R3821
R913
C12
47u
47u
D875
D878
R3816
RC3
Q856
SW3804
R930
D5
C19
100u
100u
R892
SW3808
Q869
D889
D11
D23
R936
R932
R9
22K
R934
R19
1K
D13
C13
2200p
SW3807
Q867
SW3803
R900
RC1
SW3805
C17
100u
100u
R891
D6
R3818
Q870
D872
D7
R18
2.2K
2.2K
C21
1000u
R933
D18
D876
SW3806
D884
D882
D14
C6
330u
R896
Q857
D887
R937
D9
R910
Q855
D871
R14
150
D8
D17
R935
D873
R3
0.1
Q866
3
+5VS
AP3
7
POWER ON/OFF
5
K-BOARD
HOT
CN2
9
6
14
5
AP1
12
SWITCHING TRANS
13
13
19
6
+32V
COLD
2
17
2
H:ABNORMAL
1
HOT
L:NORMAL
1
DD1
AC CORD
13V(SOUND_10V OVP)
4
18
CH
7.5V(PANEL_5V OVP)
TV/VTR
RL1
7
MAIN_SW_DET
CH
+5VS
VOL
VOL
RELAY
IC854
STB+5V
INV_ADIM
PANEL 5V ON/OFF
16
14
17
13
18
12
AP4
11
7.5V(SUB_5V OVP)
13
15
SOS DET
2
+30V(BT)/+5V(P)
18
SWITCHING REG
20
IC851
HOT
22
19
1
+24V
SUB+9V
POWER UNIT
MAIN+3.3V
AP6
2
2
6
Z2
5
POWER SWITCH
7
13
6
8
6
3
5
10
11
4
1
14
3
Q861
POWER_ON
1
AP4
15
4
DC-DC ON/OFF
4
SUB+5V
2
MAIN+9V
4
PANEL+5V
5
14
3
GENE
2
INV_ON
5
AVR
INV_SOS
1
4
INV_PWM
2
COLD
+24V(INV)
AVR
1
15
SOUND+10V
+24V(INV)
5
COLD
BT_30V
+24V(INV)
OSC
DC-DC ON/OFF CONTROL
+24V(INV)
IC855
+24V(INV)
1
4
2
3
AVR
11
5
SHORT DET
IC852
IC853
1
2
PC2
AVR
LCD PANEL
+24V(INV)
5
+24V(INV)
16
+24V(INV)
5V
+24V(INV)
FEED BACK
1
9
11V(SUB_9V OVP)
6
2
1
AVR
3
DRIVE
K5
1
T2
2
RELAY
KEYSCAN
STBY 5V
3
Q2
4
+32V
CONTROL
(INVERTER)
TO
DC-DC ON/OFF
DC-DC ON/OFF
RECTIFIER
B
7
4
6
D
2
E
C
A
8
1
5
3
AP-BOARD
TC-19/23LX50, TC-19/23LE50
Block Diagram (1/3)
Block Diagram (1/3)
TC-19/23LX50, TC-19/23LE50 Block Diagram (1/3)
TC-19LX50 / TC-23LX50 / TC-19LE50 / TC-23LE50
15
8.2. Block Diagram (2 of 3)
+
+
IR
Y
PR
PB
OUT
C
R
L
Y
R
MONIT
OR
R
C
AV
1
Y
L
V
AV
2
R
L
V
L
SD
A0B
R_LED
D1-PR
G_LED
VO
L
MAIN-L
SRQ
MAIN-R
V2_L
PANEL_ON
TV_SOS
V2_V
SUB_ON
INV_SOS
V1_V
V1_DET
SUB_ON
MAIN_ON
V2_DET
RM
V1_L
TV-L
KEY
V2_S
AI
V1-Y
V1_C
TV-R
V2_C
V1-L
RM
INV_PWM
V1_R
D1-R
SD
A1
AFT
D1-PB
R_LED
V2-S
SCL1
V2_Y
D1-Y
G_LED
TV_SOS
V2-Y
D1_Y
MAIN_SW
KEY
V1_Y
INV_ON
V2-R
D1_PR
INV_ADIM
D1-L
SDA1
INV_SOS
SCL1
V2-V
D1_PB
V2_R
INV_ON
V2-L
SCL1
V1_DET
V1_S
V2-C
SCL0B
V1-V
V1-S
P
ANEL_ON
SCL0A
MAIN_SW
TV
-R
SDA1
MAIN-R
SD
A1
TV
-L
MAIN-L
MON_DEF
MAIN_SW
SCL1
SCL2
SDA2
SD
A0A
MUTE
MUTE
AI
V1-R
D1_R
D1_L
AFT
VO
L
SDA0A
SCL0A
MON_DEF
MAIN_ON
V1-C
V2_DET
Q2310
Q2308
Q2307
MAIN3.3V
R2333
C2323
16V 100u
Q3002
C2326
16V
100u
R2329
Q2311
Q3003
JK3001A
NC
NC
L
R
G
C
Y
G
Y-
G
C-G
G
V-
S
W
V
L
R
G
C
Y
G
Y-
G
C-G
G
V-
S
W
V
L
R
G
NC
NC
NC
Y
PB
PR
G
L
R
G
NC
NC
Q1107
61
BLANCE
91
MONITOR
9
27
VIDEO1
4
26
44
L(-)
REMO
TE
S DET
L(+)
MUTE
AUDIO
ADJ
3
MUTE(L)
6
LED R
AMP
2
26
6
2
13
6
4
14
2
MUTE(R)
LED G
LED R
22
Y
LED G
MONITOR
S DATA
AI SENSOR
96
13
V
27
6
AFT
9
59
L
10
8
97
VIDEO
TV
1
3
30
IC4029
A4
11
92
Q4006-Q4014
49
7
14
MAIN+2.5V
+9V(M)
56
51
RESET
IC4030
VIDEO2
SOUND_10V
4
MAIN+1.8V
56
AVR
SUB9V
SOUND_10V
GC3FM
S_DATA2
A MUTE
5V(S)
+11V(SOUND)
SUB_5V
IC4021
109
BT30V
AD+2.5V
MAIN_3.3V
2.5V(PLL)
SUB_ON
12
66
TV_SOS
MAIN_ON
HP MUTE(L)
VIDEO
VO
L
STB_5V
HP MUTE(R)
MAIN_SWDET
AFT
28
117
PANEL_5V
V1 DET
Q3001
HS/VS
L AMP
AUDIO
IC4023
TREBLE
R
IC4020
CONTROL
SOUND CONTROL
AV SW
(10bit)
DEFFET
CLAMP
YUV
U/V-V
AUDIO DET
5
BASS
L OUT
AUDIO DEF
39
I/F
S DET
4
A/D
CIRCUIT
S CLOCK1
R-OUT
BTL
40
24
11
R
11
C
13
Pr
SIF
29
64
15
MON DEF
L-OUT
R
C/Pb
18
23
5
Y
VIDEO
20
Pr
60
7
21
TUNER
10
PANEL_ON
22
+3.3V(M)
S CLOCK0A
PB
S2 DET
10
11
INV_ON
S_CLOCK2
L
15
12
24
2.5V(AD)
S D
A
T
A
1
13
L
PANEL_5V
+2.5V(M)
116
15
INV_SOS
V/Y
15
16
KEY
16
12
INV_ADIM
17
V
R(-)
INV_PWM
REMOTE
18
10
INV ON
Q2303
Q2306,
Q2312,Q2314
KEYSCAN
R(+)
111
8
15
AUDIO OUT
P
A
NEL5V_ON
IC2302
MAIN SW DET
2
IC1103
89
5
MCU
22
1
MAIN ON
C
S_DATA
S_CLOCK
V
TV SOS
AVR
STB+3.3V
SIF
PR
INV SOS
IC1103
R OUT
R
12
STB+3V
7
VO
L
BUFFER
5
8
IC2301
14
AFT
AVR
S
D
ATA
0
A
17
R AMP
Q001
4
+B
S
D
ATA
0
B
1
A3
VIDEO1
SDA
S CLOCK0B
Y
5
5
SCL
3
SRQ
8
UV IN
IC3001
33
55
A2
2
9
10
54
TU001
COMPONENT
V/Y
8
BT_30V
SUB_9V
AI
MAIN_9V
2
4
+5V(S)
AVR
PLL+2.5V
1
5
STB+3.3V
AVR
5
(10bit)
A
C
ON
CLK
110
C/Pb
OSD OUT
105
S CLOCK
L
(16bit)
21
VIDEO2
102
COMPONENT
CIRCUIT
SP(L-)
HP(L+)
SP(L+)
SP(R-)
SP(R+)
HP(R+)
14
DEMODU
19
22
FILTER
MTS DEMODULATER
21
IC2202
L
18
+5V(M)
R
IIC
7
MATRIX
1
2
26
25
24
30
31
DIGITAL CORE, 3D Y/C SEP
LUMINANCE
DEMODU
DIGITAL
SKEW
CHROMA
LINE MEMORY
I/F
PROCESS
3D
Y/C SEP
MOVE DET
WIDE
Y/C SEP
SELF
2D
DET
CLAMP
SYNC SEP
ID1/ED2
DET
INV
SY 52
CC
CIRCUIT
Q4022-Q4024
CC
78
WP
STB_3.3V
SDA
IC1104
SCL
EEPROM
5
1
RESET
IC4024
IC1105
+3.3V(STB)
DATA
ADR
DATA_I/O
ADDRESS
FLASH MEMORY
4
IC1102
RESET
2
125
RESET
1
+9V(S)
57
OSD DATA
HV/CLK
16bit
CVBS
FILTER
SELECT
Q4045-Q4047
IC4032
115
CVBS FL
TR ON/OFF
L:fc 14MHz
H:fc 30MHz
6
5
7
8
EEPR
OM WP
114
L-OUT
R-OUT
19
V2 DET
11
15
9
14
10
12
8
13
A-BOARD
1
2
3
4
5
6
7
8
9
10
11
12
TC-19/23LX50, TC-19/23LE50 Block Diagram (2/3)
TC-19/23LX50, TC-19/23LE50 Block Diagram (2/3)
TC-19LX50 / TC-23LX50 / TC-19LE50 / TC-23LE50
16
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