LG 50PJ340 Training Manual - Page 70

Y-Drive Buffer Troubleshooting, YOU CAN CHECK FOR A SHORTED BUFFER ICs OUTPUT USING THIS PROCEDU

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Y-Drive Buffer Troubleshooting YOU CAN CHECK FOR A SHORTED BUFFER ICs OUTPUT USING THIS PROCEDURE BACK SIDE BUFFER IC (FGnd) FRONT SIDE Using the "Diode Test" on the DVM, check the pins for shorts or abnormal loads. RED LEAD On Floating Ground BLACK LEAD On "ANY" Output Lug Reads 0.79V Indicated by white outline BACK SIDE BLACK LEAD On Floating Ground RED LEAD On "ANY" Output Lug Reads Open Indicated by white outline Any of these output lugs can be tested. Look for shorts indicating a defective Buffer IC 6 Ribbon cables communicating with the Panel's (Horizontal Electrodes) totaling 768 lines determining the Panel's Vertical resolution pixel count. 70 July 2010 50PJ350 Plasma

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70
July 2010
50PJ350
Plasma
Using the “Diode Test” on the DVM, check
the pins for shorts or abnormal loads.
Y
-
Drive Buffer Troubleshooting
Drive Buffer Troubleshooting
RED LEAD On
Floating Ground
BLACK LEAD On “ANY”
Output Lug Reads 0.79V
YOU CAN CHECK FOR A SHORTED BUFFER ICs OUTPUT USING THIS PROCEDU
YOU CAN CHECK FOR A SHORTED BUFFER ICs OUTPUT USING THIS PROCEDU
RE
RE
Any of these output lugs can be tested.
Look for shorts indicating a defective Buffer IC
Indicated by white outline
6 Ribbon cables communicating with the Panel’s (Horizontal
Electrodes) totaling 768 lines determining the Panel’s Vertical
resolution pixel count.
BACK
SIDE
FRONT SIDE
BUFFER IC
(FGnd)
BACK SIDE
BLACK LEAD On
Floating Ground
RED LEAD On “ANY”
Output Lug Reads Open
Indicated by white outline