Weird problem with Sony KV-20FV12

[Dude111]

Originally Posted by old_coot88

.....Don't know how long it will last, though.
Screen shot attached.

Excellent!!!

I hope she is happy now and will give you excellent quality for along time

[dieseljeep]

Originally Posted by Electronic M

Dude...It's just a 15 year old BPC!...I can go out any day of the week and get 10 working ones just like it for free....Hell when I see a BPC on the curb I don't even test it (if I even stop), but instead just rip out everything except the cabinet and CRT to use as parts for mid 70's and older sets that actually have some value.

You might be seeing more "curbside setters" as Best Buy quit taking in TV's and computer monitors for recycling, free. They now going to charge $25.00, just like others do.

[jr_tech]

So after resoldering the board conenctions, cleaning the crt pins, the cathodes took a bit of running at normal voltages to recover?

jr

[old_coot88]

That's as good a explanation as any.

[kf4rca]

Have to remember that one. Thanks.

[old_coot88]

Zeno, you being the resident Sony guru, lemme pick your brain a bit. The jug in this Wega KV-20FV12 is starting to get a little soft again. Before I think about pulling the back again, is there a heater series resistor? I can't find a schematic anywhere showing the CRT area. Presumably the resistor would be on the CRT socket board.

I know some other brands had 'em. Having retired from the repair trade in 1986, I'm not overly knowlegable on newer stuff.

[Findm-Keepm]

Originally Posted by old_coot88

Zeno, you being the resident Sony guru, lemme pick your brain a bit. The jug in this Wega KV-20FV12 is starting to get a little soft again. Before I think about pulling the back again, is there a heater series resistor? I can't find a schematic anywhere showing the CRT area. Presumably the resistor would be on the CRT socket board.

I know some other brands had 'em. Having retired from the repair trade in 1986, I'm not overly knowlegable on newer stuff.

3.3 ohm 2W resistor, R718 or R71B, depending on how the CRT board is marked...off pin 7 of the CRT socket.

[old_coot88]

Wow, thanks. May be able to milk the old jug a while longer now.