Panasonic VIERA 50 Series - Circuit Operation Protection Circuit; Power LED Blink Mode; Trouble Mode and Defective Board; How to find the defective board

Circuit Operation Protection Circuit
Power
LED
Blink
Mode
LED Blinking
times
Trouble Mode
Defective Circuit Board (example)
improved
42PD50U I37.42PX50U /42PX500UI 50PX50U
/
50X500U
1
1
IIC
communication NG
Unknown
(
D
)
2
12V down SOS P, D
3
3.3V
down
SOS
D
4
Power SOS
(Vsus,
5V down)
P,
(SC, SS, D,
SU, SD)
5
P5V SOS D, P, C, SC, SS,
Panel
6
SC Energy Recovery SOS(37”,42”)
+
SC
Floatinq Volt.
SOS
(50”)
SC,
SS, D, P
SC, SU, SD, SS, D, P
7
SC
Floating Volt.(37”,42”)
DATA Driver SOS
(50”)
SC, SU, SD, D, P
SS, D,
C,
P
8 SS
Energy recovery
SOS
SS, SC, D, P
9 Soft-Ver. Combination NG D
10 Tuner Power SOS
PA,
P,
(H, DG, Z, DT, DV)
PA, P, (H, DG, GS, Z, DT, DV)
11
Fan SOS PB, FAN
12
Sound SOS PB, Z
LED Blinking Timing
U:J
j«-*j
I.Osec
[*)
Note
2 and 3 times LED blinking become to 1 time in 1st design.
So, when 1 time LED Blinking is found, execute the flow chart
of 2 and
3
times described later.
Panel SOS LED
2-8
times blink <TH-42PD50U>