Hello I need a replacement for this thermistor, here are the markings: T(thunder symbol)9 MZ73BLL
9RMData sheet (see page 7):
TV set I'm trying to fix: Roadstar CTV 2050 Data sheet:
Could someone please write a list of suitable replacements? Thank you.
On Wed, 16 May 2012 06:29:55 -0700 (PDT), Goldfish put finger to keyboard and composed:
That looks like a typical 9 ohm degaussing resistor. Just about any
3-pin PTC degaussing resistor should do.For example, Murata makes popular replacements, eg PTH451C9R0Q21:
- Franc Zabkar
-- Please remove one 'i' from my address when replying by email.
Er..... not quite!
The most common type has 2x PTC pellet - one of which is directly across the incoming mains after the switch, this heats the degauss pellet to cut off any residual current that would cause picture shimmer.
Some makes (notably Philips) sometimes use a PTC/NTC combination - the NTC; as you would expect is in series with the mains to the rectifier, where it serves the dual role of limiting inrush surge and using the current drawn for heating to raise the PTC above residual current.
Putting a PTC/NTC combination in place of a 2x PTC is likely to result in vapourised PCB tracks and welded switch contacts.
If you've salvaged your replacement degauss resistor from a scrap set; you can trace the circuit before binning the board - or you can measure the resistance of both thermistors, then heat the middle pin with the soldering iron for a minute or two and check that both resistances increase.
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I'm sorry but I have to ask the obvious question. Why not try to get the OEM part? Lenny
I'm sorry but I have to ask the obvious question. Why not try to get the OEM part? Lenny vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
Might cost more than the value of an old CRT telly to do so.
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