Tcp 3.3V B+ Check - LG 42PJ350 Training Manual

TCP 3.3V B+ Check

TCP 3.3V B+ Check
For Connectors P162 on the
Control board, see Control
board section.
With all connectors connected, place the Red
Lead On 3.3V = Diode Check (0.60V)
Black Lead On 3.3V = Diode Check (0.39V)
With all connectors removed, place the Red
Lead On 3.3V = Diode Check (0.64V)
Black Lead On 3.3V = Diode Check (0.4V)
Warning: DO NOT attempt to run the set with the
Heat Sink over the TCPs removed.
Checking IC121 for 3.3V, use center pin or Case of component.
3.3V in on Pins 1 ~ 5 only on P232 connector from the Control board
3.3V
5.0V
3.3V
Control Board
P161 and P162
102 August 2010
Gnd
3.3V for TCPs
IC121 on
Control Board
3.3V
All Connectors to All TCPs look very
similar for the 3.3V test point. The trace
at pins 32 and 33 of each connector.
There is a small feed trough and a Cap,
you can use for Test Points.
Example here from P305. You can only
check for continuity back to IC231, you
can not run the set with heat sink
removed.
42PJ350 Plasma