Quote:
Originally Posted by Electronic M
Got a schematic? Know where the end below chassis goes to? Those details will tell all.
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The service manual will tell that the wire is there to isolate an open tube heater, as this set is a transformer less series string set.
You were instructed to take a continuity test between that wire and the chassis for a part of the series string and from that wire to another point, probably the damper tube socket. It was supposed to make open heater troubleshooting easier.
I did it both ways, pulling tube from the beginning of the string and from the end. I never took me that long to find an open heater. I knew the tube heater pins by heart, so I could do it real fast with an Ohm meter.
If the tubes light, your problem isn't there.
Motorola did the same thing!