[TechAssist] Re: Toshiba ARCING IN CRT NECK only at turn on
- From: MDileo0000@xxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 18 Sep 2003 19:53:37 EDT
Bil
These are showing up pretty regularly with H-K shorts and you may be seeing
the beginning of it with filament insulation particles being accelerated out of
the neck into the bell at turn on. The filaments always did glow brilliant at
turn on and settle down as you have observed. Toshiba tech said that this
brings up the image to full brightness quickly and the filaments are lower in
resistance when cold, drawing more current initially.
Dominic DiLeo
Atlantic TV
Freeport, Maine
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In a message dated 9/18/03 4:18:19 PM Eastern Daylight Time,
tv.vcrrepair@xxxxxxxxxxx writes:
> Toshiba CF3566A
> 1991 35" TV
>
> There is arcing at the bottom, inside the CRT gun assembly (between a
> thin metal plate and a white plastic insulator).
>
> This happens only for a second at turn on, and at the same time, the
> filament glows too bright (also just for a second).
>
> IT APPEARS THAT THE HIGH VOLTAGE MAY BE GOING TOO HIGH MOMENTARILY
>
> Anyone seen this happen on any TV? Would appreciate any help.
>
> The HOT blew out when this first started. New one is holding up
> (customer insists on using TV until fixed - doesn't arc except at
> turn-on).
>
>
> --
> Best regards,
>
> Bil Green
> 2001 TV VCR
> Mammoth Lakes, CA 93546
> 760-934-2001 mailto:tv.vcrrepair@xxxxxxxxxxx
>
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