Panasonic TX-L42DT50B / TX-L42DT50Y / TX-LR42DT50 / TX-L47DT50B / TX-L47DT50Y / TX-LR47DT50 Service Manual ▷ View online
Adjustment Method
Sub-Contrast/White Balance Adjustment
Instrument Name
Connect to
Remarks
1. Remote
controller
2. LCD WB meter (Minolta CA-210 or equivalent)
3. Comunication
3. Comunication
jig
4. Computer for external control
Correlation can be also taken by
CS-1000A or equivalent
CS-1000A or equivalent
Procedure Remarks
Subcontrast adjustment
1. Receive PAL colour bar (100% white) RF signal.
2. Enter “Contrast” adj. In SERVICE mode.
3. Start adjusting by using Yellow Key.
4. If the adjustment finished normally, the letter of Contrast will change from red
2. Enter “Contrast” adj. In SERVICE mode.
3. Start adjusting by using Yellow Key.
4. If the adjustment finished normally, the letter of Contrast will change from red
to black.
White Balance adjustment
1. Procedure basically performs checking using the production software and
make automatic adjustment using external computer.
2. It adjusts in the mode of: Colour balance Normal
Viewing Mode Dynamic
Normal
Highlight x: 0.307
Viewing Mode Dynamic
Normal
Highlight x: 0.307
0.010
y: 0.322
0.010
Normal
Lowlight x: 0.307
0.010
y: 0.322
0.010
Let the panel standfor more than 3
hours at more than 20
hours at more than 20
C.
Basically perform adjustment in the
ambient environment of room
temperature more than 20
ambient environment of room
temperature more than 20
C.
The aging time is more than20 min
at above room temperature.
Applied signal
100% full colour bar
0.7V p-p white peak
85% modulation
100% WHITE
50% GRAY
at above room temperature.
Applied signal
100% full colour bar
0.7V p-p white peak
85% modulation
100% WHITE
50% GRAY
25
CI SLOT
JK1070
BT
A21
WIFI
A20
HDMI2
JK4701D
HDMI1
JK4700D
HDMI4
JK4703D
HDMI3
JK4702D
SER
VICE
CONNECT
OR
CN0100
SD SLOT
CN8660
PC
JK3005
A-BOARD
AV1 scart
JK3003
JK8600
ETHERNET
TU6702
A12A
SPEAKERS WOOFER
A10
K-BOARD
REMOTE
UNIT
K10
LP-BOARD
LP10
RM10
A02
D3006
DIGIT
AL
AUDIO
OUT
LCD PANEL
A15
HP
JK3051
JK3001
AV
2
YUV
,V IN,
AUDIO IN
Side T
erminal
Bottom T
erminal
TUNER
JK8450
USB1
JK8451
USB3
JK8452
USB2
Wiring Diagram
P-UNIT
LD-BOARD
P2
CN001
MAIN IN
P4
CN700
CN100
LD3
LD1
LD2
LD4
26
Block Diagram (1/2)
IC8000
[MN2WS0250E]
LD
A
4
Audio Output
Video Input
Audio Input
Video Output
JK3003
AV1_VIN
11
AV1_VOUT
2
AV1_RED/C
18
AV1_GREEN
15
AV1_BLUE
13
AV1_LIN
7
AV1_LOUT
5
AV1_RIN
8
AV1_ROUT
4
AV1
AA11
AE12
AE13
AD13
AE12
AE13
AD13
V1
R3
G3
B3
JK3005
PC
1
2
3
2
3
PC-R
PC-G
PC-B
PC-G
PC-B
AD11
AE11
AF11
AE11
AF11
R2
G2
B2
G2
B2
AE9
AE10
AD10
AE10
AD10
R1
G1
B1
B1
V1
R3
G3
B3
G3
B3
R2
G2
B2
B2
Y
PB
PR
L
R
L
Y/V
in,PB,PR
JK3001
AUDIO
IN
LIN3_LP
L
R
LIN3_RP
R1
G1
B1
R2
G2
B2
R1
G1
B1
G2
B2
R1
G1
B1
VOUT
VOUT
AC11
Q3051
Q3052
Q3053
LIN1_RP
LIN1_LP
LIN1_LP
LIN1_RP
LIN1_LP
LIN1_LP
LIN1_RP
LIN1_LP
AA5
AA4
AA4
LIN3_RP
LIN3_LP
LIN3_RP
LIN3_LP
AD4
AF5
AF5
HP1_L
JK3051
HP1_R
HP-OUT
AD7
AF8
AF8
LO2_L
LO2_R
IC3052
Audio Amp
1
2
6
7
LO2_L
LO2_R
LO2_R
LO2_L
LO2_R
AE6
AD6
AD6
HP1_L
HP1_R
HP1_L
HP1_R
HP1_R
Digital
Audio
Out
D3006
V7
IECOUT
AB23
ARCOUT
IECOUT
IECOUT
SUB3.3V
JK4700D
HDMI1
HPD2
5VDET2
DDCSDA2
DDCSDA2
DDCSCL2
CEC
CEC
RX2
JK4701D
HDMI2
HPD1
5VDET1
DDCSDA1
DDCSCL1
DDCSCL1
CEC
RX1
JK4702D
HDMI3
HPD0
5VDET0
DDCSDA4
DDCSCL4
CEC
DDCSCL4
CEC
RX2
JK4703D
HDMI4
HPD3
5VDET3
DDCSDA3
DDCSDA3
DDCSCL3
CEC
RX1
IC4700
HDMI SWITCH
(C1AB00003469)
RX2
RX1
DDCSDA4
DDCSCL4
DDCSCL4
DDCSDA3
DDCSCL3
DDCSCL3
53,54,56,57
59,60,62,63
51
52
38,39,41,42
44,45,47,48
36
37
17,18,20,21
23,24,26,27
HDMI I/F
RX2
RX1
RX0
RX0
DDCSDA0
DDCSCL0
30
29
ARCOUT
STM
DDCSDA0
DDCSCL0
HPD2
HPD1
HPD0
HPD3
5VDET2
5VDET1
5VDET0
5VDET3
DDCSDA0
DDCSCL0
DDCSDA1
DDCSCL1
DDCSDA2
DDCSCL2
DDCSDA3
DDCSCL3
DDCSDA4
DDCSCL4
CEC
HDMI I/F
HDMI_SW3.3V
6,12,19,25
40,46,55,61
JK8450
USB2
IC8453
SW
6
1
3
4
USB5V
USB2VBUS
USB2OD
USB2DP
USB2DN
JK8451
USB1
IC8454
SW
6
1
3
4
USB5V
USB1VBUS
USB1OD
USB1DP
USB1DN
JK8452
USB0
IC8455
SW
6
1
3
4
USB5V
PWR
OVR
DD-
DD+
A20
WiFi
IC8457
SW
6
1
3
4
USB5V
PWR
OVR
DD-
DD+
IC8458
USB HUB
31
30
17
18
43
42
5
6
SUB3.3V
1,7,12,16,19,
25,34,37,38,44
3
4
USB0DP
USB0DN
USB I/F
USB2VBUS
USB2OD
USB1VBUS
USB1OD
USB POWER CTRL
P24
P25
ETHERNET
JK8600
9
T8600
1
2
3
6
11
14
16
8
6
3
1
TX+
TX-
RX+
RX-
IC8600
[C1CB00003736]
LAN CONTROLER
6
5
4
3
RMII_RXD0,RXD1
RMII_TXD0,TXD1
RMII_REFCLK,TXEN,
CRS_DV,RXER
MDIO,MDC,INTL,
PHYRSTL
SUB3.3V
7,14,30
31
32
X8600
TX+
TX-
RX+
RX-
LAN CON I/F
CI SLOT
JK1070
17,18
51,52
SUB_CI_5V
CN8660
SD SLOT
SUB3.3V
TS-OUT
TS-IN
TS Parallel output
TS Parallel input
HSBCLKOUT
HSSYNCOUT
HSVALOUT
HSDOUT[0;7]
HS0BCLKIN
HS0SYNCIN
HS0VALIN
HS0DIN[0;7]
SYSTEM BUS
CI I/F
SDDA
TA
SD CARD I/F
CN0100
SERVICE
SUB5V
IC8200
DDR3
SUB1.5V
IC8201
DDR3
SUB1.5V
DDR3 I/F
IC8900
NAND FLASH
SUB3.3V
NAND FLASH I/F
IC8902
EEPROM LD
A
4
SUB3.3V
EEP_WP
BE I2C
A23
A12A
IC4900
[C1AB00003871]
AUDIO AMP
32
1
2
3
1
2
3
4
17,18,23,24,31
11,12
14,15
26,27 29,30
L-
L+
R+
R-
K6
L6
L7
M7
AUDIO OUT
16V
DMD_ IIC1
SOUND_SOS
STM
AD19
IC5000
[AN34043AAVF]
ANALOG ASIC
1
6
2
14
30 31
STB5V
STB5V
SUB5V
SUB9V
STB1.1V
28 12
32
STB3.3V
HP_MUTE
23
Q4971 Q4972
HP_MUTE
HP_MUTE
PEAKSRST
PEAKSRST
STB_XRST
STB_XRST
AC13
BL_PWMA
3
PWM_A_IN
F5
3
7
9-10
12
A02
TO P2
4
6
9
13
1,3,5
16V
TV_SUB_ON
STB5.8V
2
BL_ON
BL_SOS
KEY1
15
TV_SUB_ON
AD17
KEY1
BL_SOS
BL_ON
REMOTE
R_LED
G_LED
STB3.3V
A10
11
9
10
7
6
5,10
3
AI
4
SUB3.3V
9
R2003
SUB_AI_3.3V
REMOTE
G_LED
R_LED
AI
TO K10 / LP10 / RM10
SUB3.3V
15
SUB_AI_3.3V
OVP SOS
SUB3.3V
USB5V
SUB5V
TU_1.2V
SUB1.1V
SUB1.5V
IC5300
REG
4
9
16V
PNL12V
IC5400
REG
2
3
16V
SUB3.3V
IC5420
REG
2
3
16V
SUB5V
IC5440
REG
2
7,8
16V
USB5V
8
6
16V
SUB1.1V
8
6
16V
SUB1.5V
R4076
TCON2.5V
SUB3.3V
IC8702
REG
3
4,2
SUB3.3V
SUB1.8V
IC8404
REG
1
5
SUB5V
SUB_CI_5V
IC8706
REG
4,1
5
SUB5V
HDMI_SW3.3V
HDMI3.3V
A15
RX0AN,P; RX0BN,P
RX0CN,P; RX0CLKN,P
RX0DN,P; RX0EN,P
RX1AN,P; RX1BN,P
RX1CN,P; RX1CLKN,P
RX1DN,P;RX1EN,P
19,20,21,22,
24,25,27,28
29,30,31,32
34,35,36,37
39,40,42,43
44,45,46,47
LVDS I/F
PNL12V
1-9
54,55
BE I2C
SDA,SCL
SER
VICE
59
57
56
SDA,SCL
TO P
ANEL
VJ8660
VDDSD18V33V
SUB3.3V
R8637
WOL3.3V
SUB3.3V
STB3.3V
STB1.1V
SUB1.1V
SUB1.8V
SUB1.5V
SUB3.3V
TCON2.5V
VDDSD18V33V
WOL3.3V
HDMI3.3V
A-BOARD
[EXCHANGE UNIT]
SER
VICE
POWER_ON
POWER_ON
1
2
3
1
2
3
1
2
3
1
2
3
IC8100
Step_down
CONVERTER
IC8101
Step_down
CONVERTER
L6707
SI_3.3V
SUB3.3V
22
5
6
IC4901
[C1AB00003871]
AUDIO AMP
32
1
2
3
17,18,31
11,12
14,15
16V
N5
BE COMMON I/O
Wo- Wo+
SP_L
SP_R
Woofer
BT_LR
PWM_ENB
5
PWM_ENB
49
LOGO_ON
LOGO_ON
Y17
A21
11
2
1
3
5
BT_LR
SUB3.3V
9
10
BT_USBDN
BT_USBDP
BLUETOOTH
8
3D_ON
3D_ON
D5
14
BL_ECO
IC5780
REG
2
3
16V
TU_1.2V
IC5720
REG
1
5
SUB3.3V
TUNER DVB-T/T2/C/SA
T
TU6702
SI_3.3V
SUB1.8V
12,13,14,
2
SDA/SCL
7,8
DMD_ IIC1
16V
22
FE_XRST
6
20
FE_XRST
IC6851
[C1AB00003807]
LNB
DMD_IIC0
FE_XRST
K7
IFAGC1
9
IFAGC1
DMD_ IIC1
DMD_IIC0
TUNER I2C
IFAGC1
IF1_P,N
10,11
IF1_P,N
U5
IF1_P,N EA2, AF2
Parallel TS
BE COMMON I/O
SDA/SCL
15,16
DMD_IIC1
TU_1.2V
20
18
33
8,7
LNB_PWR
32
DISEQC_IIC1
21-31
1
W7
FE_OSC_ENB
FE_1.2V/2.5V
FE_1.2V/2.5V
16V
16V
SUB9V
8
DISPEN
PWM_ENB
PWM_ENB
DISPEN
IC2002
Operational
AMP
5
SUB3.3V
4
LP_FB
LP_FB
12
LP_5V
13
38,37
DMD_ IIC1
TU_1.2V
SUB3.3V
48
29
FE_XRST
IFAGC2
T2FEAIN_P,N
IC6900
[C1AB00003808]
DVB-T/T2/C DEM
Parallel TS
3,4,5,8,9,12
13,14,15,16,17
34 35
X6900
3
IFAGC2
4,5
IF2P/N
27
Block Diagram (2/2)
K-BOARD
K10
4
5
6
7
5
6
7
3
STBY 3.3V
SUB3.3V
SN2800
AI
3
1
VCC
OUT
D2800
R G
AI
G LED
R LED
SUB3.3V
AI
STBY 3.3V
R LED
G LED
LP-BOARD
TO
A10
LP10
2
1
TO
A10
D2880
D2881
D2882
D2883
LD-BOARD
IC9500
LED DRIVER
(C1ZBZ0004571)
LD2
3
5
7
5
7
2,4
6,8
10,12
14,16
1
TO P
ANEL
11
13
15
13
15
9
LD4
2
5
7
5
7
1
TO P4
10
9
VLED
VLED
16V
VLED
16V
2,3
FB
BL-ON
BL-SOS
BL-ON
BL-SOS
61
1
60
LED-K8
LED-K7
LED-K6
LED-K5
LED-K4
LED-K3
LED-K2
LED-K7
LED-K6
LED-K5
LED-K4
LED-K3
LED-K2
LD1
3
5
7
5
7
2,4
6,8
10,12
14,16
TO P
ANEL
11
13
15
13
15
9
17
LED-K1
28
25
22
18
14
11
25
22
18
14
11
8
5
LED-K16
LED-K15
LED-K14
LED-K13
LED-K12
LED-K11
LED-K10
LED-K15
LED-K14
LED-K13
LED-K12
LED-K11
LED-K10
LED-K9
55
52
49
46
42
38
35
32
LD3
1-8
5
7
7
TO P
ANEL
11
13
20
13
20
9
64-71
PWMRST
72
77
76
75
74
PWM_CLK
SEL
SDI
SCK
LOAD
78
DVDD
28
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