Panasonic TC-P55VT60 Technical Troubleshooting Manual page 59

At this point
the SD is
bad, the
following
steps are
SU
used to see
if the SD is
also bad.
Picture -
VFG
(screw)
SU41
SC
SD46
SC50
JUMPER
SD42
VFG
(screw)
SD
From the previous page
Reconnect SU41 on the
SU board and disconnect
SD42 on the SD board.
Perform the same
resistance test.
A
Is there a
No
short
circuit?
See the picture "A" on the left side and:
• Remove the 2 or 4 VFG screws from the SU
and SD boards.
• Unplug SC41, SC42, and SC46 from the SC
board.
• Install the SC50 Jig or just jump pins 1 and 2
of connector SC50 on the SC board.
• Plug in the TV. Note:
does not turn on automatically after the
TV is plugged in as expected, then press
the power switch.
Does the TV
No
shut down
with 7
blinks?
Replace the
SD board.
Yes
Replace the
SC board.
If the power LED
Yes
Replace both
the SC and SD Replace the
boards
A – From the previous slide
Unplug SU41 on the SU board and
perform the same resistance test.
Is there a Yes
No
short
circuit?
With SU41 unplugged, use the VFG ground and
measure the resistance of both VF5V (SRV –
VF5V) and VFO (SRV – VFO) on the SD board.
VF5V
SRV VF5V
VFO
SRV VFO
No
Is there a
short
circuit?
SU board.
(3 of 4)
At this point
the SU is
bad, the
following
steps are
used to see
if SD or SC
are also
bad.
SD42
VFG
(screw)
Yes
B - Continue
on the next
slide
Slide 59 Slide 59