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Plasma Fall 2008 42PG20
Control PWB Testing
Control PWB Testing
For quick PWB test.
(All PWB connectors
Disconnected).
Jump 5V from Power
Supply to IC121 Pin 1.
If the Temp LED lights,
Pretty much guaranteed,
PWB is OK.
Quick observation
Of Temp. LEDs
Tell if the Control
Board is running.
When the Television has a problem related to;
1) Shutdown caused by Main PWB
2) No Picture
This can be checked by the following.
(1) Disconnect the Main PWB from all connectors. Apply AC power.
Since P813 is not connected, the set will come on. Short the two pins on the Auto Test Pattern lands.
If there is a picture of cycling colors, the Y-SUS, Y-Drive, Z-SUS, Power Supply,
Control PWBs and Panel are all OK.
Same test for (2) to tell if the No Video is caused by the Main PWB.
Confirm B+ to Control PWB
VS_DA
Control PWB Check
3V ~ 3.3V
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