Panasonic TC-P55VT60 Technical Troubleshooting Manual page 48

Troubleshooting 2 Blinks Failure (All VT60 and ZT60 Models)
Applies to
Models
Unplug the TV. Set your voltmeter to measure DC
TC-P55VT60 voltage. Ground the negative (Black) lead and place
the positive (Red) lead on: pin 12 of connector P6 on
TC-P60VT60
the P board for models TC-P55VT60 and TC-
P60VT60) and pin 13 for all other VT60 and ZT60
TC-P65VT60
models. Plug-in the TV and press the power switch.
TC-P60ZT60
TC-P65ZT60
No
Replace the P
board
Unplug the TV. Measure the resistance between chassis ground and any of the SRV_P3.3V test
points on the C boards. (For SRV_P3.3V locations see the picture on the next slide).
Replace the A
board
No
Replace the
C2 board
Remove the ribbon cable between the C1 board and the C2
board. Measure the resistance between chassis ground and
any of the SRV_P3.3V test points on the C1 boards.
No
Is there a
short circuit?
Replace the
C3 board
Start Here
Does
15V appears
briefly?
No
Is there a
short circuit?
Is there
Yes
a short
circuit?
Replace the
C1 board
Yes
Remove the ribbon cable between the C2 board and the C3 board. Measure the
resistance between chassis ground and the SRV_P3.3V test points on the C2 boards.
Blink List of boards likely to cause this symptom.
Code
No specific order
2 Blinks A Board
Yes
Replace the
A board
Yes
Remove all the connectors between the C
boards and the panel. Measure the resistance
between chassis ground and any of the
SRV_P3.3V test points on the C boards.
The Panel is
defective
C1-C2-C3 P Board
Is there
No
a short
circuit?
Unplug connectors A31
and A32 on the A board.
Measure the resistance
between chassis ground
and any of the
SRV_P3.3V test points
on the C boards.
Is there
Yes
No
a short
circuit?
Panel
Yes
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