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

Chassis Board Layout

KEY CONTROL
P-BOARD

Setting Inspection

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