Chassis Board Layout; Setting Inspection - Panasonic TX-20LA80F Service Manual

Chassis Board Layout

KEY CONTROL
P-BOARD
Board Name
Key Control

Setting Inspection

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