I hope someone could give me a few pointers here. Set is a hitachi CL
1709 with g7-ps mk3 chassis, estimated 1992-3 vintage.I have just replaced a shorted power supply regulator STR D6601 and resoldered a number of dry joints around the power supply area which I suspect caused it to fail. Checked for any other shorted diodes or open resistors and found nothing suspect. Set now powers up and works well. Raster is stable, correct size, no evidence of any breathing or blooming etc. sound also fine.
However, after running the set for about 30 mins I decided to check all was Ok inside. STR D6601 and its heatsink were fine, but I noticed that the chopper transformer (marked M 2229751) was excessively hot, to the point where I could not hold my finger against its metal core for more than a few seconds. It also buzzes , not excessively but noticeably, in operation. Obviously there is something amiss here. Is it a case of changing the transformer or is have I missed something else causing the overheating?
regards, B.