Led Blinks 8 Times - Panasonic TH-42PX75U Technical Manual

<Trouble Mode and Defective Board>
Trouble Mode
SS Energy recovery SOS/Panel
Disconnect
CN SS11 and SS23 (*2)
from the SS board and
CN P12 (*1) from the P
board. Turn the TV on.
Does the TV power up
and stay on?
Yes
No
Is the collector of Q251 or the
anode of D255 on the SS board
high.
Panel
SS34

LED blinks 8 times

Defective Board (possibility)
SS, SC, D, P board (SS>SC,D,P)/PDP
Turn the TV on.
No
Is the VSUS(*3) input at
pin 1 of CN P11 present
before Shutdown?
Yes
D Board
Yes
SS Board
(*4)
Q551 and D255 Location.
SS Board
SS34
Warning: Disconnect AC Power prior to
making any disconnection or
Disconnect
No
CN SC2, and SC20
from the SC board.
Turn the TV on. Does
the TV power up and
stay on?
Yes
SC Board
(*1) Place a jumper across pin 8 and 10 of
connector P12. The unit will not enter the standby
mode without the jumper.
(*3) VSUS about 180V (Accurate voltage is written
on the Panel Label of the chassis)
CAUTION : To avoid potential shock from the VSUS
voltage, discharge the connectors SC2 or SS11
before reconnecting them into their respective
socket.
(*4) If the power LED continues to blink after
replacing the SS board, change the D board.
16
connection.
(*2) = The reference
number of the sustain
data connector is
different in some of the
No
models:
TH-42PX75U = SS23
TH-42PX77U = SS23
TH-50PX75U = SS33
P Board
TH-50PX77U = SS33