RCA AU122N Questions

[TinCanAlley]

I have had this TV for quite some time and went to turn it on last week and, nothing. If found the fuse had blown, so I replaced it. I turned it on and it seemed to work, but I thought I'd go over it to see if there was something obvious as to why the fuse blew. Of course I have no clue if there is something wrong with just a visual inspection.

I do have a couple questions, though. I tested the CRT and it is good. But was wondering why there is no suction cup on the anode. Is this correct? I tried searching for the answer as to whether all anodes had a cap, but found nothing.

Also, what is that bulb attached to the CRT socket? Never seen it before.

Thanks!

[Electronic M]

Given it looks like there's clear shrink tubing over the connector solder joint it probably never had a suction cup. A lot of monochrome sets never had a suction cup. The Predicta never even had heat shrink they just stuck the wire into the spring clip and soldered.

I don't see a bulb but if it's neon it could be used as a spark gap...That was a somewhat common practice too.

[Tom9589]

I can see a neon bulb on top of the CRT. Tom C. is correct that a neon bulb is often used as a spark gap.

[TinCanAlley]

Originally Posted by Electronic M

Given it looks like there's clear shrink tubing over the connector solder joint it probably never had a suction cup. A lot of monochrome sets never had a suction cup. The Predicta never even had heat shrink they just stuck the wire into the spring clip and soldered.

I don't see a bulb but if it's neon it could be used as a spark gap...That was a somewhat common practice too.

Cool. I just figured I'd check as I know how some people attempt repairs and leave it worse than when started.

[TinCanAlley]

Originally Posted by Tom9589

I can see a neon bulb on top of the CRT. Tom C. is correct that a neon bulb is often used as a spark gap.

Ah, learn something new everyday. The only spark gaps I've seen are in my Zenith and they are two wires tied together near the top.