|
Philco Seventeener III - Horizontal Blanking and Retrace lines
I have a couple of Seventeener III sets that both have this problem. When the brightness is set about right I get white retrace (scan) lines at the top of 1/5th of the screen. I can make them disappear if I back off the brightness but this makes the picture too dark.
Seems to be a horizontal blanking issue.
I assumed that the issue was related to some bad networks. So I ordered a set from Crist. But sure would like to know where to poke around and discover the actual problem instead of just replacing parts. I have the schematics.
I did a complete recap of both sets. This fixed a multitude of issues. but...the retrace lines remain.
Last edited by koviatt; 12-14-2018 at 08:38 AM.
Reason: Unclear topic
|