Panasonic TX-LR22X20 Service Manual ▷ View online
TX-LR22X20
25
7.12. Pedestal Assembly 2
Stick RUBBER FOOT to BASE PLATE.
TX-LR22X20
26
8 Measurements and Adjustments
8.1.
Voltage chart of A-board
Set IP-Board to a dummy set or dummy load and check the satisfaction with the specified voltage as following table.
8.2.
Voltage chart of IP-board
Set IP-Board to a dummy set or dummy load and check the satisfaction with the specified voltage as following table.
POWER SUPPLY
NAME
MEASUREMENT
POINT
SPECIFICATION
SUB1.8V
TP5601
1.74 - 1.90 V
SUB1.2V
TP5600
1.18 - 1.32 V
SUB3.3V
TP5602
3.19 - 3.46 V
SUB5V
TP5200
4.9 - 5.1 V
SUB9V
TP5220
8.82 - 9.18 V
STB5V
TP5400
4.9 - 5.1 V
POWER SUPPLY
NAME
MEASUREMENT
POINT
NORMAL
CONDITION (V)
STBY CONDITION
(V)
17V
TP7502
18 ± 1
NO CARE
DTV12V
TP7501
12 ± 0.6
NO CARE
TUNER6V
TP7601
5.9 ± 0.3
NO CARE
TX-LR22X20
27
9 Block Diagram
9.1.
Main Block Diagram
(L
E
D
:7
T
IM
E
S
)
(L
ED
:1
TIM
ES
)
(L
E
D
:4
T
IM
E
S
)
(L
ED
:3
TIM
ES
)
(L
E
D
:9
T
IM
E
S
)
(L
ED
:3
TIM
ES
)
STB5V
TMDS DATA
DCDC
V10
STB_RESET
TUNER5V
INV_SOS
OVP_DET
ERROR DET
TUNER5V
POWER LED(R)
DTV12V
POWER CONTROL
LCD PANEL
TUNER6V
STB3.3V
INV_SOS
STB5.8V
DCDC
D/A
RECTIFIER
+5.8VS
SUB5V
PANEL POWER SOS
VOFF2-6V
SUB9V
DCDC
V
SUB9V
SOUND SOS
STB_RESET
DVDD2.5V
AMP
DCDC
SOUND SOS
STB3.3V
VCON31V
INV_ON
(STM)
(SIDE)
DTV_L/R
DROP
D/A CONVERTOR
SUB1.2V
STB5V
CONTROL PANEL
DVB_CVBS
R
L/R
HDMI I/F
PFC CONTROL
V-BOARD
ANALOG-ASIC
Y/PB/PR, R/G/B/H/V CVBS
VOLTAGE
V/Y/PB/PR
STANDBY VOLTAGE RECTIFIER
C.A.T.S. SENSOR
DTV12V SENSE
INV_ON
SUB3.3V
PANEL POWER SOS
OPTICAL AUDIO OUT
DCDC
DVDD2.5V
OVP_DET
DCDC
DTV12V
INVERTER POWER CONTROL
CURCUIT
PWM
SUB1.8V
VIDEO PROCESSOR
STB+3.3V
SUB5V
R/G/B/H/V
PWM
VREF_1-12
REMOTE RECEIVER
OVER
AC CORD
STB+3.3V
12V
SUB 3.3V SENSE
AUDIO
PANEL
EEPROM
AUDIO PROCESSOR
SUB_ON
TS Parallel
SD CARD DATA
OPERATION BUTTON
VOLTAGE
K-BOARD
HDMI2
A02
EEPROM
K01
NAND FLASH
DVDD2.5V
ON
HDMI1
LIVE
+5.8VS
INV_PWM
TMDS DATA
POWER LED
INV_PWM
INV_SOS
SUB1.8V
SPEAKER(R)
(A Chip)
AV2
CPU BUS I/F
(D Chip)
CONTROL
DCDC
NEUTRAL
17V
SOS DET
A-BOARD
PANEL
OPTICAL OUT
SUB_ON
SOS DET
AV SW
AVDD13.7V
PC
MONITOR L,R
POWER LED
P-BOARD
POWER SUPPLY
MONITOR OUT
MONITOR V
DIGITAL SIGNAL PROCESSOR
OPTICAL
V
REMOTE RECEIVER
A/D CONVERTOR
AVDD13.7V
P5,P6.P7,P8
C.A.T.S. SENSOR
AVDD13.7V
RECTIFIER
LINE FILTER
SOUND17V
AUDIO
A14
SPEAKER(L)
HP
HEADPHONE
CPU BUS
INV_PWM
SD CARD
OUT
AV1
SUB ON/OFF
L
+5.8VS
RECEIVER
HOT START
(DAC_ENB)
SD CARD DATA
PROCESS VOLTAGE RECTIFIER
REMOTE IN
L/R
RELAY
32V
DTV12V
Peaks sLD
SOUND17V
TS Parallel
SIF
SUB5V
STB+5.8V
SLOT
SUB3.3V
LVDS DATA
POWER SW
P2
L/R
P1
BACK LIGHT
DCDC
SUB1.2V
A10
LVDS DATA
INV_ON
STB5V
KEYSCAN
A09
A12
C.A.T.S. SENSOR
IFD_OUT
OFDM
SIF_OUT
TUNER
V
(LED:7TIMES)
(LED:1TIMES)
(LED:4TIMES)
(LED:3TIMES)
(LED:9TIMES)
(LED:3TIMES)
TX-LR22X20
28
10 Wiring Connection Diagram
10.1. Wire Dressing 1
Wire
Clamper
1
2
3
4
5
6
7
8
9
10
11
No.1 AC
No.2 A25 - SP
No.3 A10 - V10
No.4 A03 - CN002
No.5 Analog tuner digital
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