LG 50PS80 Training Manual page 58

Y - SUS (Y Drive Waveform Set
Y - SUS (Y Drive Waveform Set
1) Pre-Heat unit for at least 10 Minutes before making adjustments.
Vs, Va, -Vy and VSC adjustments should be completed.
2) Place unit into White Wash from the Customer's Menu for all adjustments.
PROCEDURE: (See figure to the right for locations)
Oscilloscope TP on the "Waveform" TPs on the Y-Drive PWB.
3) SET-UP ADJUSTMENT VR602:
Adjust VR602 while observing area (A) and set the flat portion to
10uSec ± 5uSec. While observing only the peak of the waveform,
turning the pot CW which cause the peak to dome to the left of the
flat portion. CCW will cause the peak to decrease in amplitude.
Turn CW until the dome appears, then back off CCW.
4) SET-DOWN ADJUSTMENT VR601:
Adjust VR601 while observing
area (B) and set to
160uSec ± 5uSec.
- Up and Set - Down Adjustments)
- Up and Set - Down Adjustments)
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V Set-Dn Adj
VR601
Lower Center Of PWB
August 2009 Plasma 50PS80
V Set-Up Adj
VR602