Slide 79
From the previous page
B - Continue
on the next
slide
A – From the previous slide
Unplug SU41 on the SU board and
perform the same resistance test.
Yes
No
Is there a
short
circuit?
Reconnect SU41 on the
SU board and disconnect
SD42 on the SD board.
Perform the same
resistance test.
YesNo
Is there a
short
circuit?
Replace both
the SC and
SD boards
Replace the
SC board.
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: If the power LED
does not turn on automatically after the
TV is plugged in as expected, then press
the power switch.
YesNo
Does the TV
shut down
with 7 blinks?
Replace the
SD board.
With SU41 unplugged, use the VFG ground and
measure the resistance of both VF5V (SRV –
VF5V) and VFO (SRV – VFO) on the SD board.
YesNo
Is there a
short
circuit?
Replace the
SU board.
(3 of 4)
SD42
VF5V
SRV VF5V
SRV VF5V
VFO
SRV VFO
SRV VFO
VFG
(screw)
SC
SC
SU
SU
SD
SD
SU41
SD42
VFG
(screw)
SD46
VFG
(screw)
SC50
JUMPER
Picture - A
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