Old Muntz TV for sale Locally to me, Should I pick it up?

[vortalexfan]

Originally Posted by Tube TV

Vortalexfan, how are you doing with this, are you making any headway?

Unfortunately no, I'm no closer to figuring out what's causing my 5U4 tube to arc and red plate than I was a couple of weeks ago.

I've been testing various components and replacing suspect capacitors in the power supply and I'm not getting anywhere.

[Kevin Kuehn]

Originally Posted by vortalexfan

Unfortunately no, I'm no closer to figuring out what's causing my 5U4 tube to arc and red plate than I was a couple of weeks ago.

I've been testing various components and replacing suspect capacitors in the power supply and I'm not getting anywhere.

So what did you find out when you followed Electronic M's below procedure?

Originally Posted by Electronic M

Procedure: disconnect C1a positive and L1 from pin 2 of 5U4. Measure resistance to ground at pin 2 if the resistance is that specified in the service literature or higher then the short is not in the tube or power transformer (but if it meaures well below spec resistance spec the tube socket and or power transformer are prime suspects).

[vortalexfan]

Originally Posted by Kevin Kuehn

So what did you find out when you followed Electronic M's below procedure?

I haven't had a chance to try it yet.

I'm actually kind of afraid to disconnect the wires from the rectifier tube socket because I'm afraid I might accidentally reconnect them wrong and screw things up even more than they already are, especially since I don't which wires are the wires that Electronic M is talking about.

I did post a schematic of the power supply for this TV on here, if someone could mark on the power supply which wires are the ones I need to disconnect and test I can get a better idea of which wires to disconnect and test without risking disconnecting more wires than need to be.

[Kevin Kuehn]

Originally Posted by vortalexfan

I haven't had a chance to try it yet.

I'm actually kind of afraid to disconnect the wires from the rectifier tube socket because I'm afraid I might accidentally reconnect them wrong and screw things up even more than they already are, especially since I don't which wires are the wires that Electronic M is talking about.

I did post a schematic of the power supply for this TV on here, if someone could mark on the power supply which wires are the ones I need to disconnect and test I can get a better idea of which wires to disconnect and test without risking disconnecting more wires than need to be.

Can you take a picture before you disconnect the wires so you'll have a reference to get them back to original? Not trying to be rude, but you need to take the initiative to follow directions and report back if you expect folks to help you troubleshoot this. If I can get the picture to load I drew a red line thought the connections you'll need to open.

[vortalexfan]

Originally Posted by Kevin Kuehn

Can you take a picture before you disconnect the wires so you'll have a reference to get them back to original? Not trying to be rude, but you need to take the initiative to follow directions and report back if you expect folks to help you troubleshoot this. If I can get the picture to load I drew a red line thought the connections you'll need to open.

That's the thing that L1 coil doesn't seem to be present in my TV, the Focus coil is there but that inductor coil or whatever it is that L1 is supposed to be doesn't seem to be present in my TV, at least not that I can see of.

I'll take a picture of that part of the TV so you can see what I mean.

[vortalexfan]

Below is a picture of the power supply circuit on my TV showing that L1 does NOT exist in my set (at least not that I'm aware of).

[Kevin Kuehn]

Originally Posted by vortalexfan

Below is a picture of the power supply circuit on my TV showing that L1 does NOT exist in my set (at least not that I'm aware of).

L1 is the small transformer(filter choke) to the left of the power transformer in your photo. Right above those electrolytic caps you've replaced. I can read the part number LG-10021 in your picture. There's only 2 wires exiting from it. One of the wires should go over to pin 2 of the 5U4 socket. It's also shown on page 4 in sams set 101, folder 5.