Tcp 3.3V B+ Check - LG 50PV450 Manual

TCP 3.3V B+ Check

TCP 3.3V B+ Check
For Connectors P101, P102
and P104 on the Control
board, see Control board board see Control board
section. 3.3V leaves on Pins
1~4 of all three connectors.
With all connectors connected, place the
Red Lead On 3.3V Diode Check (0.62V)
Black Lead On 3.3V Diode Check (0.33V) Bl k L d O 3 3V Di d Ch
This also test Data ICs on X-Boards
Left X Board P110
3.3V
3.3V 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.
k (0 33V)
3.3V in on Pins 57 ~ 60 on any connector from the Control board
Center X Board P310
3.3V
3.3V 3 3V
3.3V for TCPs
IC53 on
Control Board Control Board
All Connectors to All TCPs look very similar for
the 3.3V test point. The trace at pins 14 and 38 of
each connector. There will a small feed trough
off pin 14 and 38 you can use for Test Points.
Example here from P302. You can also note a
Capacitor (C322 here) left side to identify Pin 38.
You can only check for continuity back to IC53,
you can not run the set with heat sink removed, you can not run the set with heat sink removed
unless you disconnect VA from the Y-SUS to the
Left X-Board.
124 May 201 1 50PV450
IC53
4.98V
3.3V
Gnd G d
Right X Board P310
3.3V
Plasma