Read Panasonic TX-20LA70F / TX-20LA70P / TX-20LA7F / TX-20LA7P Service Manual online
Chassis Board Layout
Setting Inspection
Voltage Confirmation
Board Name
Function
A-Board Main
Board
A-Board Tuner
A-Board AV2
A-Board AV2
Terminal
Key Control
Key Control
P-Board
Mains Input, Power Switch
P-Board Power
Supply
V-Board
Remote Receiver, LED IR
7
A-BOARD
V-BOARD
P-BOARD
KEY CONTROL
Confirm the following voltages:
A board
Normal mode
Test
point
Position
Voltage Description
TP025
C888
5V
±0,25V
5V
TP024
C891
8,2V
±0,5V
8V
TP031
R874
30V
±2V 30V
Standby mode
TP029
C868
+pin
3,3V
±0,2V
STBY3,3V
TP030
C864
+pin
1,8
±0,15
STBY1,8V
TP025
C888
<2V 5V
P board
Normal mode
TP842
Q843
23,8V
±1V
24V
switched
TP840
Connector
P2,
pin12
9,8V
±1
12V
TP3802
IC3802,
pin1
15V
±1V 15V
TP3800
IC3801,
pin4
4,3V
±0,3V
REG2
TP3801
IC3801,
pin21
4,5V
±0,3v
REG3
Standby mode
TP842
Q843
<10V
24V
switched
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