Sears Silvertone Color

[southernguy]

Here is one of my latest finds, This is a 1966 Sears Silvertone 21 inch color model # 61861 , chassis # 529. I acquired this set from Steve(rcaman). It has a very nice cabinet and finish. This set seems to have a problem with the horizontal hold not wanting to lock in place. You could turn the knob to the left and then to the right just a little bit and then it would lock into place. The picture would stay in place for a few seconds then the tint would shift towards green, next, the color would turn to black and white and then the picture would start rolling sideways from left to right or right to left and then HH is lost. Adjust the HH knob, it would lock back into place only to repeat the same process. Usually there is a little room before you loose sync when adjusting the Horzontal Hold from left to right but not with this set. Last night I played around with it a little bit. I swaped out a 6FQ7 in the Horizontal Osccillator section, only seemed to make the problem a little worse. So I put the origonal 6FQ7 back in. While looking at chassis I noticed that steve did a little recaping, also changed a resistor. Im still waiting for some caps to come at a local parts store here in town so I can't really mess with that now. The replacments seem to be of good Quality so maybe it could be a another bad cap or maybe something else. For the past few days ive been tempted to adjust the Horizontal Osc Coil to see if that would lock the picture into place. Coils is something I never mess with but I gave it a try. I first turned the Horizonal Oscillator Coil to the left ever so slightly. Eww crap the problem got worse crap crap crap. So I went right with it and then Boom it locked and stayed locked . The Horizontal Hold knob now has alot more room when I adjust it now and is at dead center. Everything seems normal now. I have a nice picture on this roundie, great sound too. One little last problem If I change the channel or adjust the fine tunning out of range to the right there are a few signs of the existing problem. The picture will roll sideways for a second then lock. But it locks and stays locked, but still should not do that. Should I turn the Horiz Osc coil a little bit more to the right. Have any of you guys seen a simular problem to this. I tried to describe it as best as I could. For now Im going to enjoy it like it is. Ive got the set running now, its been on for 4 hours this morning without a problem with a very nice picture, but there could of corse be something im over looking that you guys may have come across before.

Bruce