LG 50PC1DR - - 50" Plasma TV Troubleshooting Manual page 66

V-Set DN too low
DUAL SCAN PDP 50PX2
All of the center washes out due to decreased Vset_DN time.
V-Set DN too high
The center begins to wash out and arc due to decreased
Vset_DN time.
Plasma Display Panel Troubleshooting - 2007
66