TV Doesn't Turn Off

[Electronic M]

Originally Posted by Outland

Sounds good! I'll update this thread as I progress.

Here's the power supply schematic. Looks like there's only one relay, part #TSE1864 which is no longer available. So the replacement relay only needs to match coil voltage?

Other important relay specs contact voltage/current rating number of throws and poles in the contacts. A SPST won't replace a DPDT relay. Too little contact voltage or current rating could mean contacts burning up, arcing shorting etc.

Aside from that mechanical mount specs can matter...Though usually can be worked around and are less significant than coil and contact specs.

[Outland]

I picked up a very similar set (CT-20G11U) for free the other day, and will take the relay from that one if this one starts misbehaving again.

I noticed that according to encompass parts, the model I picked up and the TV in question (CT-20S2S) share the same CRT. The CRT in mine is getting tired and has a little CC burn-in (for proper black level brightness has to be boosted to 25% above factory), while in the model I picked up calibration is good at factory on the same tube. In fact, the tube in the new one is in excellent condition. Does this mean I can swap the tube from the new one into mine? What would such an operation entail?

[zeno]

If the yoke is the same super easy. 4 bolts, 4 connectors &
maybe a few wire ties. In my prime I could do it & have the
back on in <15 mn. Thats if none of the tools are hiding !
If you you need to swap the yoke you have to do the complete
CRT set-up. First one takes a while especially on in line jugs.

73 Zeno
LFOD !

[Outland]

In my case, the yokes appear to be identical. I look forward to swapping them because the CRT in mine is certainly starting to get tired (though still outputs a very acceptable picture, Panasonic surely made excellent quality).

The one I picked up for free appears to have been dropped because there is some broken plastic on the top and the coaxial connector is partially broken off. Perhaps for this reason, the TV wasn't used much because the picture looks brand new.

[Outland]

Before I swap the relays, I think they should be identical even though they have different part numbers. Here's the power supply circuit from the donor TV.



Apologies for the huge images. Are they the same as the relay from the circuit in the target?