Re: Testing a HOT out of circuit.

Sounds like your measuring that HOT correctly. If your getting 0 pretty much
however you look at it then the thing is bad. You could also put your meter
on auto range resistance and check it that way. Between the two outside legs
you might get a low reading (no where near 0) but that would just be the
internal dampening diode. Readings to the center leg from either outside leg
should be pretty high.

And yes, bad caps could cause the monitor not to fire up. What your hearing
is the power supply coming on then shutting down because of the overcurrent
protection thats kicking in because of the bad HOT...

"Baraka" <grus_jc@xxxxxxxxx> wrote in message
news:1135954466.923613.110210@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> I'm working on this Tatung Chassis which goes in a merit megatouch. I'm
> not getting any heater glow in the tube, just a repeated analong
> chirping sound. It appears that the hi voltage wants to come on but
> doesn't. I checked the flyback and it doesn't appear to be cracked.
> Went over all the caps to see if there is any noticeable leaking,
> checked the solder joints too. I'm suspecting it's a blown HOT on the
> chassis. Now I'm used to the TOC type of transistors that mount to the
> side. This HOT mounts to the chassis but is black with 3 legs that
> mounts to the board. There is no mica insulator as the transistor is
> self insulating. I pulled this HOT out of circuit and tested it in
> diode test and get 0 in every which way I test it. Am I doing this
> correctly out of circuit? Do I test this much like a TIP102 transistor
> or am I missing something? Secondly, could old bad caps cause a monitor
> not to get hi voltage and no heater glow?
>
> Thanks in advance for the tech assist.
> John
>


.

Relevant Pages

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