No Power / Dead - Panasonic TH-42PZ80U Technical Manual

Trouble Mode Defective Board (Possibility)
Dead/No power
Yes NO
Is there 5V present
when the TV is plugged into
the AC line?
Yes
Is there continuity
Yes
between pins 8 and
10 of connector
P12 of the P
board?
Disconnect connector A7. Place your
volt-meter on pin 5 of connector P7.
Plug in the TV and turn it on.
NO
Go to the Replace
Next slide The P board
No Power/Dead Unit
P, A, GS, K
Unplug the TV and place your
volt-meter on pin 5 of
connector P7. Plug in the TV.
Unplug the TV
Check connection
between P12 and
NO SS12. Also check for
missing jumper on
SS34 on the SS board.
If jumper on connector
SS34 is present,
replace the SS board.
Yes
Is there 5V when the
TV is plugged in?
Replace
The A board
NO
Do the AC relays
click after the TV is plugged
into the AC line?
Place your volt-meter on
pin 9 of connector A1.
Press the power switch
Does
NO
pin 9 of connector
A1 go from 4.5V to 0V while the
power button on the TV is
pressed?
If wiring connections
are ok, check
the S & K boards.
33
Warning: Disconnect AC
Power prior to making any
disconnection or connection
Yes
Unplug the TV and place your volt-meter
on pin 11 of connector P25 or A25. Plug
in the TV and press the power switch
Is there 3.2V
NO
present when
the power
button is
pressed?
Yes
Replace
Replace
The P board
The A board
Yes