No Picture From Tv Reception - Panasonic TC-32LX70/70 Technical Manual

No Picture from TV Reception

Yes
Are DTV 9V
And SUB
5V OK?
Are SUB_3.3V
and SUB_1.2V present
on the A board? Refer to
Slide 46 for test
point locations
.
Yes
Replace the DT board
Is there video from
any of the inputs?
Check for the BT30V, DTV_9V, and
SUB_5V on connector AP3
of the AP board. Refer to Slide 45 for test
point locations.
Yes
No
No Replace defective Regulator and
biasing components. Reference
the power distribution diagram on
Slide 21.
Replace the A board
Yes
No
Check the cathode of D7601
Is the
on the AP Board. Cathode of D7601
BT30V
should measure 30V. If not, repair the DTV9V
source
DC/DC converter
OK?
53
See the
No
troubleshooting
flowchart for No
picture.
.