Panasonic TH-42PZ80U Technical Manual page 10

Trouble Mode
15V down SOS
Plug in the TV and turn it on. Measure
the voltage at pin 1 of connector P7
Is there
No
15V
present?
Replace
The P board
Reconnect P25 and measure the
resistance between pin 1 of
connector P7 and ground (Chassis)
Is there a
No
short
circuit?
Go to the
Next slide (A)
LED blinks 2 times
Defective Board (Possibility)
P, A, D, SC, SS, PB Board (P > A, SC, SS, PB)
Unplug the TV and check the resistance between
pin 1 of connector P7 and ground (Chassis)
No
Yes
Replace
The D board
Disconnect SC20 on the SC board
Yes
and measure the resistance between
pin 1 of connector P7 and ground
(Chassis
Unplug connectors P6, P7, P12, and P25 on the P
Is there a Yes
board. Measure the resistance between pin 1 of
short
circuit? connector P7 and ground (Chassis)
Reconnect P12 and measure the
resistance between pin 1 of
connector P7 and ground (Chassis)
Yes
No
Is there a
short
circuit?
Go to the
Next slide (B)
10
Warning: Disconnect AC Power prior to
making any disconnection or connection
Yes
No
Is there a
short
circuit?
The P board
Replace
The SS board
Replace