Nanao MS8-29FSG issues

For monitor related issues
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crawdingle
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Nanao MS8-29FSG issues

Post by crawdingle »

Hi all, been reading the forums for a bit they're always very helpful!

Recently my Astro City's monitor stopped powering on, I noticed an arc around fuse F902 so I immediately unplugged and removed the chassis.

After visual inspection (the chassis is super filthy, I will get that cleaned up). NTH901 appears faulty (cracked in two essentially). From some reading I've determined this is a thermistor in the deguass circuit.

I guess this boils down to three questions for me:

1) Is this likely the root cause of the issue?
2) Is this thermistor cracking an indicator of a larger issue with the chassis?
3) Is there a known replacement for this thermistor I can order? (I've read that it could be a MCM Electronics # 33-650 Globar Thermistor, is that correct?)

Attaching a picture of the trouble area. Thanks again!
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grantspain
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Re: Nanao MS8-29FSG issues

Post by grantspain »

thats a NTC 7 ohms, it could be the issue
This acts as a inrush current limiter and affects the entire AC input circuit
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crawdingle
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Re: Nanao MS8-29FSG issues

Post by crawdingle »

Thanks for the reply!

I'm looking on Newark at the ICL NTC's and there's loads of different, would you happen to know of a replacement part off hand / anything to avoid?

Thanks again.
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grantspain
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Re: Nanao MS8-29FSG issues

Post by grantspain »

just checked one out of circuit and its more like 5 ohm
ac power fuse is 3a i think so this should be ok
https://www.newark.com/amphenol-advance ... 457?st=ntc
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crawdingle
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Re: Nanao MS8-29FSG issues

Post by crawdingle »

Great, thanks! I'll order that and swap it out and move on with my troubleshooting. Appreciate it.
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