LG 50PK950 Training Manual page 124

TCP 3.3V B+ Check
TCP 3.3V B+ Check
For Connectors P101, P102
and P104 on the Control
board, see Control board
section.
With all connectors connected, place the Red
Lead On 3.3V Diode Check (0.66V)
Black Lead On 3.3V Diode Check (0.33V)
This also test IC100, IC200 and IC300
Left X Board P110
3.3V
Warning: DO NOT attempt to run the set with the
Heat Sink over the TCPs removed.
Checking IC53 for 3.3V, use center pin or Top of component.
3.3V in on Pins 57 ~ 60 on any connector from the Control board
3.3V
3.3V for TCPs
IC53 on
Control Board
Center X Board P210
124 October 2010
Right X Board P310
3.3V
All Connectors to All TCPs look very
similar for the 3.3V test point. The trace
at pins 33 and 34 of each connector.
There will be two small feed troughs',
(TP) you can use for Test Points.
Example here from P203. You can only
check for continuity back to IC53, you
can not run the set with heat sink
removed.
50PK950
IC53
5V
3.3V
Gnd
Plasma