Hi guy's got one of the above which uses l.g. pdp42v5 display & drive p.c.b's.from cold she comes on & works normally.after about ten mins picture becomes more & more purple negative pulsating with picture content. All the voltages from p.s.u. & the 15volts from zsus p.c.b. seem normal.I have checked all the 33uf smd caps on ysus p.c.b. all are low in value & poor E.S.R. up in the 4-5ohm region the only ones I haven't got to are at the edge of the big heat sink .I have changed the caps I can get to but still same fault.Could it be the display or may be the big i.c.? any idea's.
Fixed it today,I.C.8 on ysus board top right hand corner above main elect caps. i.c.type sm0380r
Topic: tatung tpt4202s plasma picture fault when hot.(it's fixed) (Read 3725 times)