HITACHI - 51F710A, 57F710A, 65F710A (DP55) 51F710E, 57F710E, (DP57) 51F710G, 57F710G, (DP55) 51F59, 57F59, 65F59, (DP65) 51F59A, 57F59A, 65F59A (DP65G) 51F59J, 57F59J, 65F59J _ PRT SPOT PREVENTION

     If one or more PRTs have a spot mark around the center, check the +220V filter capacitor, CP50 (DP-5x chassis) or C965 (DP-6x chassis); if value is 100 MFD/250V, replace with 220MFD /250V. See images below for physical location; FIG-1 for DP-5x chassis, FIG-2 for DP-6x chassis.

DP5X-CHASSIS

DP6X - CHASSIS