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NEC 68cm PF68T32 CRT No Power

 
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monarols



Joined: 22 Apr 2008
Posts: 3

PostPosted: Tue Apr 22, 2008 7:14 am    Post subject: NEC 68cm PF68T32 CRT No Power Reply with quote

Hi all, Have the above television which has had very little use, and spends most weeks in standby mode. The TV actually gets viewed about 3 hours a week, lol.

The problem is that I came to turn it on the other day, and noticed the "red standby" light was not on, checked the mains plug, all ok.

I thought it may have beena fuse, but when I opened it up, couldnt find a fuse on the PCB anywhere. I did notice tho, a component that looks like its blown. and has prionted on it T4A/250v. is this a fuse? See Below:



I do recall a lightning storm a few days earlier and hadnt tried watchingthe TV until now. The only other strange thing is that there is 4 other items sharing the powerboard, 3 of which were also on standby, but no damage occured to these units, so was only the TV. Could it be lightning damage, and if I replaced the burned component, would that fix the TV?

Thanks Chris.
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vtech



Joined: 08 May 2006
Posts: 1264
Location: USA

PostPosted: Tue Apr 22, 2008 8:03 pm    Post subject: Reply with quote

Yes, that is a fuse in a different pacakaging. (same as a 4A slo- blo fuse).

Mainly selected due to lower cost in production. You can use a"pigtail" 4A 125/250V slo-blo fuse in place of it---if unable to find one.

....Not a bad idea to check for"possible" shorted diodes(due to lightning) before powering up which will blow the fuse right away.
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PostPosted: Thu Apr 24, 2008 8:24 am    Post subject: Reply with quote

Thanks vtech, will look around to see if I can get one then. Cheers!
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monarols



Joined: 22 Apr 2008
Posts: 3

PostPosted: Thu Apr 24, 2008 10:36 am    Post subject: Mmmm, may be more serious? Reply with quote

I notice some brown gunk on the power switch connections, is this likely to be a fried switch as well? Pic attached:
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vtech



Joined: 08 May 2006
Posts: 1264
Location: USA

PostPosted: Thu Apr 24, 2008 5:59 pm    Post subject: Reply with quote

No problem with the brown stuff.--common solder flux residue left over from soldering that happense all the time. No worries.
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monarols



Joined: 22 Apr 2008
Posts: 3

PostPosted: Thu Apr 24, 2008 11:39 pm    Post subject: Reply with quote

OK, thanks vTech. Had no luck getting the same type fuse here, Tandy and Dick Smith just looked at them and more or less said they had never seen those type before, so dont stock them (bit of a worry) LoL, so will have to use a pigtail one, as you suggest. Cheers!
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