Panasonic TH-42PX50U Replacement Procedure page 44

PDP White Balance Adjustment (Step 4-1)
Adjust the Red Cutoff settings to match the values in Table 1.
Page 34
Before
Y525I :JUST
IIC
Panel W/B Adj.
R Cutoff
88
After
Y525I :JUST
IIC
Panel W/B Adj.
R Cutoff
88
Mid
88
Mid
7B