Resistor on a post in CRT monitor?

[gmc]

I'm busy trying to repair a old 12" CRT from the early 80's - Yes, I'm  aware of the electrical dangers 

One of the components is a 56R resistor which is now reading 100R. Looking at the schematic it's a 56R RN1/4 which from what I can gather is a 0.25W Metal Film Resistor.  Resistor looks a bit worse for wear and has overheated.

That's all good and easily replaceable. One thing that I've noticed is that there are a few resistors around the HV side that have one leg soldered to a post which I've not seen before.

Guessing it's to keep it off the PCB for cooling? But why one leg and why mount it to a post? (Or is the post also some sort of heat sink?)

Was this a standard for the CRT's in the 80's?

[johansen]

Usually 2 posts were used to keep the heat away from the board

[jonpaul]

post keeps HV arc to PCB surface eg dust.

Very common.

Use carbon comp resistor rated for the HV

Jon

[gmc]

Thanks for the info. Will source the correct resistor replacement.

[inse]

You can see the windings, this isn’t a carbon composition resistor but a metal film type.

[CaptDon]

I absolutely agree that it is metal film!!! Carbon Comp replacement is a huge mistake seeing how the metal film burned up. I would also recommend the flameproof version FP which the original resistor probably was. Looks like the O.E.M. expected a possible failure mode of this part and could be part of the reason for the post mounting.