LG 50PK950 Training Manual page 91

Y - Drive Buffer Troubleshooting
Y - Drive Buffer Troubleshooting
BACK SIDE
BUFFER IC FLOATING GROUND (FGnd)
Any of these output lugs can be tested.
Look for shorts indicating a defective Buffer IC
HOW TO CHECK FOR A SHORTED BUFFER IC
HOW TO CHECK FOR A SHORTED BUFFER IC
FRONT SIDE
Using the "Diode Test" on the DVM, check
the pins for shorts or abnormal loads.
RED LEAD On
Floating Ground
Indicated by white outline
Reversing the leads reads Open
FRONT SIDE OF Y-DRIVE BOARD
8 Ribbon cables communicating with the Panel's (Horizontal
Electrodes) totaling 1080 lines determining the Panel's Vertical
resolution pixel count.
91 October 2010
BLACK LEAD On "ANY"
Output Lug Reads 0.78V
50PK950 Plasma