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What does RT mean on a pcb

hi i am a self taught repairer of basic electronic items and have been doing it for about 4 years, as i buy faulty items repair them then sell them on but i have a batch of about 25 PVRs i have repaired about

20 of them but there is one part on the last 4 that i need and cant identify

It is on the power supply board

it is labelled RT1 and looks alot like a small capacitor

it has the marking 8S100L on it

it is one of the early components on the board (next after the fuse- F1))

please help as i have repured the rest of the board but am sure that i need to replace this aswell as it is showing scorch marks

Reply to
rupert
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Probably a MOV for surge protection.

Reply to
James Sweet

It's a 'surgeguard' style NTC thermistor. Have you measured them ? They can run quite hot btw.

Graham

Reply to
Eeyore

They look similar to NTCs too. The MOV will be 'across the line' where an NTC will be in series.

Graham

Reply to
Eeyore

hi THANKS ALOT its an NTC then but how do i find the value of the one i need

Reply to
rupert

been

about

i

Highly likely that RT means Resistor - Temperature (dependant).

It will be a NTC inrush current suppressor.. Since the unit is not likely to be using more than a couple of 10's of watts at most you could use one such as this

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Reply to
Ross Herbert

Measure a good one ?

They're specced by surge capability (related to size) and hot and cold resistance. You should be able to find a suitable replacement from that.

Graham

Reply to
Eeyore

NTC

resistance.

THANKS FOR YOUR REPLIES I GET SOME ON ORDER!!!

Reply to
rupert

Could this device (or similar) be put in series with my halogen puck lights that keep blowing bulbs - and would it help?

Reply to
jtaylor

Yes it could.

It might do. It will certainly reduce the inrush.

Graham

Reply to
Eeyore

cant

fuse-

that

Could you please explain what a "puck light" is?

I am familiar with the standard halogen downlights operating from ac mains supply via a transformer but not knowing the specifics of your particular halogen I couldn't say whether the NTC would help.

Reply to
Ross Herbert

Is it a microprocessor PCB? Does it say "RTS"?

"Return to sender, address unknown".

But that's just a guess...

--
Al, the "king"
Reply to
Usual Suspect

I would guess he means the hockey puck shaped halogen fixtures meant for mounting under kitchen cabinets.

Reply to
James Sweet

snipped-for-privacy@NOSPAM.hfx.andara.com wrote in news: snipped-for-privacy@4ax.com:

When that happens, start by taking an accurate voltmeter and measuring the AC voltage on the lamps. If it's too high, of course they will keep blowing.

What about other light bulbs? Do they keep blowing too? What is the voltage at an outlet?

Reply to
Jim Land

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