Panasonic Viera TH-42PX75U, Technical Manual

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LED blinks 7 times
<Trouble Mode and Defective Board>
<How to find the defective boards>
Trouble Mode
SC Floating voltage SOS
Defective Board (possibility)
SC, SU, SD, P board (SC,SU,SD>D,P)
SS Board
P Board
Disconnect
the connectors SC2,
and SC20 from the SC
board. Turn the TV on.
Does the TV power up
and
stay on?
Turn the TV on.
Does 15Vdc appear
at pin 1 of CN P25 on the
P board before the unit
shuts down?
Turn the TV on.
Does
VSUS(*1)
voltage appear at pin 1 of
CN P2 of the P board
before shutdown?
Connect
the connectors SC2(*2),
and SC20 to the SC board.
Remove the SU board.
Turn the TV on. Does the
TV power up
and stay on?
SU Board
Yes
No
Yes
No
Yes
No
Yes
No
Make sure the connectors P2/SC2, SC20/D20 are not loose and seated properly.
Note: CN = Connector
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
Install
the SU board and
Remove the SD board.
Turn the TV on. Does
it power up
and stay on?
SD Board
Yes
No
P Board
SC Board.
NOTE: If the SC board
does not fix the
problem, replace the D
board.
(*1) VSUS about 180V
(Accurate voltage is
provided on the Panel
Label)
(*2)
CAUTION:
Before connecting
P2/SC2 or P11/SS11,
discharge is necessary
to prevent potential
shock caused by
VSUS
.
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